lily/parser.yy

   1 %{ // -*-Fundamental-*-
   2
   3 /*
   4   parser.yy -- Bison/C++ parser for LilyPond
   5
   6   source file of the GNU LilyPond music typesetter
   7
   8   (c) 1997--2005 Han-Wen Nienhuys <hanwen@xs4all.nl>
   9                  Jan Nieuwenhuizen <janneke@gnu.org>
  10 */
  11
  12 /*
  13 FIXME:
  14
  15    * The rules for who is protecting what are very shady.  Uniformise
  16      this.
  17
  18    * There are too many lexical modes?
  19 */
  20
  21 #include "config.hh"
  22
  23 #include <cctype>
  24 #include <cstdlib>
  25 #include <cstdio>
  26 using namespace std;
  27
  28 #include "book.hh"
  29 #include "context-def.hh"
  30 #include "dimensions.hh"
  31 #include "music.hh"
  32 #include "file-path.hh"
  33 #include "input-smob.hh"
  34 #include "input.hh"
  35 #include "lily-guile.hh"
  36 #include "lilypond-input-version.hh"
  37 #include "main.hh"
  38 #include "misc.hh"
  39 #include "lily-lexer.hh"
  40 #include "lily-parser.hh"
  41 #include "paper-book.hh"
  42 #include "output-def.hh"
  43 #include "scm-hash.hh"
  44 #include "program-option.hh"
  45 #include "score.hh"
  46 #include "text-interface.hh"
  47 #include "warn.hh"
  48 #include "music.hh"
  49
  50 #define MY_MAKE_MUSIC(x)  make_music_by_name (ly_symbol2scm (x))
  51
  52 Music *property_op_to_music (SCM op);
  53 Music *context_spec_music (SCM type, SCM id, Music *m, SCM ops);
  54 SCM get_next_unique_context_id ();
  55 SCM get_next_unique_lyrics_context_id ();
  56
  57 #undef _
  58 #if !HAVE_GETTEXT
  59 #define _(x) x
  60 #else
  61 #include <libintl.h>
  62 #define _(x) gettext (x)
  63 #endif
  64
  65 #define YYERROR_VERBOSE 1
  66
  67 #define YYPARSE_PARAM my_lily_parser
  68 #define YYLEX_PARAM my_lily_parser
  69 #define THIS\
  70         ((Lily_parser *) my_lily_parser)
  71
  72 #define yyerror THIS->parser_error
  73
  74 /* We use custom location type: Input objects */
  75 #define YYLTYPE Input
  76 #define YYLLOC_DEFAULT(Current,Rhs,N) \
  77         ((Current).set_location ((Rhs)[1], (Rhs)[N]))
  78
  79
  80 /* Add symbols to the TAGS field of a music object.  */
  81
  82 void
  83 tag_music (Music *m, SCM tag, Input ip)
  84 {
  85         SCM tags = m->get_property ("tags");
  86         if (scm_is_symbol (tag))
  87                 tags = scm_cons (tag, tags);
  88         else if (ly_is_list (tag))
  89                 tags = ly_append2 (tag, tags);
  90         else
  91                 ip.warning (_ ("tag must be symbol or list of symbols"));
  92
  93         m->set_property ("tags", tags);
  94 }
  95
  96 bool
  97 is_regular_identifier (SCM id)
  98 {
  99   String str = ly_scm2string (id);
 100   char const *s = str.to_str0 ();
 101
 102   bool v = true;
 103 #if 0
 104   isalpha (*s);
 105   s++;
 106 #endif
 107   while (*s && v)
 108    {
 109         v = v && isalnum (*s);
 110         s++;
 111    }
 112   return v;
 113 }
 114
 115
 116 SCM
 117 get_first_context_id (SCM type, Music *m)
 118 {
 119         SCM id = m->get_property ("context-id");
 120         if (SCM_BOOL_T == scm_equal_p (m->get_property ("context-type"), type)
 121             && scm_is_string (m->get_property ("context-id"))
 122             && scm_c_string_length (id) > 0)
 123         {
 124                 return id;
 125         }
 126         return SCM_EOL;
 127 }
 128
 129 SCM
 130 make_simple_markup (SCM a)
 131 {
 132         return a;
 133 }
 134
 135 bool
 136 is_duration (int t)
 137 {
 138   return t && t == 1 << intlog2 (t);
 139 }
 140
 141 void
 142 set_music_properties (Music *p, SCM a)
 143 {
 144   for (SCM k = a; scm_is_pair (k); k = scm_cdr (k))
 145         p->internal_set_property (scm_caar (k), scm_cdar (k));
 146 }
 147
 148 SCM
 149 make_chord_step (int step, int alter)
 150 {
 151         if (step == 7)
 152                 alter += FLAT;
 153
 154         while (step < 0)
 155                 step += 7;
 156         Pitch m ((step -1) / 7, (step - 1) % 7, alter);
 157         return m.smobbed_copy ();
 158 }
 159
 160
 161 SCM
 162 make_chord (SCM pitch, SCM dur, SCM modification_list)
 163 {
 164         SCM chord_ctor = ly_lily_module_constant ("construct-chord");
 165         SCM ch = scm_call_3 (chord_ctor, pitch, dur, modification_list);
 166
 167         unsmob_music (ch)->protect();
 168         return ch;
 169 }
 170
 171 /* Todo: actually also use apply iso. call too ...  */
 172 bool
 173 ly_input_procedure_p (SCM x)
 174 {
 175         return ly_is_procedure (x)
 176                 || (scm_is_pair (x) && ly_is_procedure (scm_car (x)));
 177 }
 178
 179 Music*
 180 set_property_music (SCM sym, SCM value)
 181 {
 182         Music *p = MY_MAKE_MUSIC ("PropertySet");
 183         p->set_property ("symbol", sym);
 184         p->set_property ("value", value);
 185         return p;
 186 }
 187
 188 Music*
 189 make_music_relative (Pitch start, Music *music)
 190 {
 191         Music *relative = MY_MAKE_MUSIC ("RelativeOctaveMusic");
 192         relative->set_property ("element", music->self_scm ());
 193
 194         Pitch last = music->to_relative_octave (start);
 195         if (lily_1_8_relative)
 196                 music->set_property ("last-pitch", last.smobbed_copy ());
 197         return relative;
 198 }
 199
 200 Music*
 201 make_lyric_combine_music (SCM name, Music *music)
 202 {
 203         Music *combine = MY_MAKE_MUSIC ("LyricCombineMusic");
 204         combine->set_property ("element", music->self_scm ());
 205         combine->set_property ("associated-context", name);
 206         return combine;
 207 }
 208
 209 %}
 210
 211 /* We use SCMs to do strings, because it saves us the trouble of
 212 deleting them.  Let's hope that a stack overflow doesnt trigger a move
 213 of the parse stack onto the heap. */
 214
 215 %left PREC_TOP
 216 %left ADDLYRICS
 217 %left PREC_BOT
 218
 219 %union {
 220         Book *book;
 221         Output_def *outputdef;
 222         SCM scm;
 223         String *string;
 224         Music *music;
 225         Score *score;
 226         int i;
 227 }
 228 %{
 229
 230 int
 231 yylex (YYSTYPE *s, YYLTYPE *loc, void *v)
 232 {
 233         Lily_parser *pars = (Lily_parser*) v;
 234         Lily_lexer *lex = pars->lexer_;
 235
 236         lex->lexval = (void*) s;
 237         lex->lexloc = loc;
 238         lex->prepare_for_next_token ();
 239         return lex->yylex ();
 240 }
 241
 242
 243 %}
 244
 245 %expect 1
 246
 247 /* One shift/reduce problem
 248
 249 1.  \repeat
 250         \repeat .. \alternative
 251
 252     \repeat { \repeat .. \alternative }
 253
 254 or
 255
 256     \repeat { \repeat } \alternative
 257 */
 258
 259
 260 %pure_parser
 261 %locations
 262
 263 /* The third option is an alias that will be used to display the
 264    syntax error.  Bison CVS now correctly handles backslash escapes.
 265
 266    FIXME: Bison needs to translate some of these, eg, STRING.
 267
 268 */
 269
 270 /* Keyword tokens with plain escaped name.  */
 271 %token ACCEPTS "\\accepts"
 272 %token ADDLYRICS "\\addlyrics"
 273 %token ADDQUOTE "\\addquote"
 274 %token ALIAS "\\alias"
 275 %token ALTERNATIVE "\\alternative"
 276 %token BAR "\\bar"
 277 %token BOOK "\book"
 278 %token CHANGE "\\change"
 279 %token CHORDMODE "\\chordmode"
 280 %token CHORDS "\\chords"
 281 %token CLEF "\\clef"
 282 %token CONSISTS "\\consists"
 283 %token CONTEXT "\\context"
 284 %token DEFAULT "\\default"
 285 %token DEFAULTCHILD "\\defaultchild"
 286 %token DENIES "\\denies"
 287 %token DESCRIPTION "\\description"
 288 %token DRUMMODE "\\drummode"
 289 %token DRUMS "\\drums"
 290 %token FIGUREMODE "\\figuremode"
 291 %token FIGURES "\\figures"
 292 %token GROBDESCRIPTIONS "\\grobdescriptions"
 293 %token HEADER "\\header"
 294 %token INVALID "\\invalid"
 295 %token KEY "\\key"
 296 %token LAYOUT "\\layout"
 297 %token LYRICMODE "\\lyricmode"
 298 %token LYRICS "\\lyrics"
 299 %token LYRICSTO "\\lyricsto"
 300 %token MARK "\\mark"
 301 %token MARKUP "\\markup"
 302 %token MIDI "\\midi"
 303 %token NAME "\\name"
 304 %token NOTEMODE "\\notemode"
 305 %token OBJECTID "\\objectid"
 306 %token OCTAVE "\\octave"
 307 %token ONCE "\\once"
 308 %token OVERRIDE "\\override"
 309 %token PAPER "\\paper"
 310 %token PARTIAL "\\partial"
 311 %token RELATIVE "\\relative"
 312 %token REMOVE "\\remove"
 313 %token REPEAT "\\repeat"
 314 %token REST "\\rest"
 315 %token REVERT "\\revert"
 316 %token SCORE "\\score"
 317 %token SEQUENTIAL "\\sequential"
 318 %token SET "\\set"
 319 %token SIMULTANEOUS "\\simultaneous"
 320 %token SKIP "\\skip"
 321 %token TAG "\\tag"
 322 %token TEMPO "\\tempo"
 323 %token TIMES "\\times"
 324 %token TRANSPOSE "\\transpose"
 325 %token TRANSPOSITION "\\transposition"
 326 %token TYPE "\\type"
 327 %token UNSET "\\unset"
 328 %token WITH "\\with"
 329
 330 /* Keyword token exceptions.  */
 331 %token TIME_T "\\time"
 332 %token NEWCONTEXT "\\new"
 333
 334
 335 /* Other string tokens.  */
 336
 337 %token CHORD_BASS "/+"
 338 %token CHORD_CARET "^"
 339 %token CHORD_COLON ":"
 340 %token CHORD_MINUS "-"
 341 %token CHORD_SLASH "/"
 342 %token DOUBLE_ANGLE_CLOSE ">>"
 343 %token DOUBLE_ANGLE_OPEN "<<"
 344 %token E_BACKSLASH "\\"
 345 %token E_ANGLE_CLOSE "\\>"
 346 %token E_CHAR "\\C[haracter]"
 347 %token E_CLOSE "\\)"
 348 %token E_EXCLAMATION "\\!"
 349 %token E_BRACKET_OPEN "\\["
 350 %token E_OPEN "\\("
 351 %token E_BRACKET_CLOSE "\\]"
 352 %token E_ANGLE_OPEN "\\<"
 353 %token E_PLUS "\\+"
 354 %token E_TILDE "\\~"
 355 %token EXTENDER "__"
 356
 357 /*
 358 If we give names, Bison complains.
 359 */
 360 %token FIGURE_CLOSE /* "\\>" */
 361 %token FIGURE_OPEN /* "\\<" */
 362 %token FIGURE_SPACE "_"
 363 %token HYPHEN "--"
 364
 365 %token CHORDMODIFIERS
 366 %token LYRIC_MARKUP
 367 %token MULTI_MEASURE_REST
 368 %token SCM_T
 369
 370
 371 %token <i> DIGIT
 372 %token <i> E_UNSIGNED
 373 %token <i> UNSIGNED
 374
 375 %token <scm> BOOK_IDENTIFIER
 376 %token <scm> CHORDMODIFIER_PITCH
 377 %token <scm> CHORD_MODIFIER
 378 %token <scm> CONTEXT_DEF_IDENTIFIER
 379 %token <scm> DRUM_PITCH
 380 %token <scm> DURATION_IDENTIFIER
 381 %token <scm> EVENT_IDENTIFIER
 382 %token <scm> FRACTION
 383 %token <scm> LYRICS_STRING
 384 %token <scm> LYRIC_MARKUP_IDENTIFIER
 385 %token <scm> MARKUP_HEAD_EMPTY
 386 %token <scm> MARKUP_HEAD_LIST0
 387 %token <scm> MARKUP_HEAD_MARKUP0
 388 %token <scm> MARKUP_HEAD_MARKUP0_MARKUP1
 389 %token <scm> MARKUP_HEAD_SCM0
 390 %token <scm> MARKUP_HEAD_SCM0_MARKUP1
 391 %token <scm> MARKUP_HEAD_SCM0_SCM1
 392 %token <scm> MARKUP_HEAD_SCM0_SCM1_MARKUP2
 393 %token <scm> MARKUP_HEAD_SCM0_SCM1_SCM2
 394 %token <scm> MARKUP_IDENTIFIER
 395 %token <scm> MUSIC_FUNCTION
 396 %token <scm> MUSIC_FUNCTION_MARKUP
 397 %token <scm> MUSIC_FUNCTION_MARKUP_MARKUP
 398 %token <scm> MUSIC_FUNCTION_MARKUP_MARKUP_MUSIC
 399 %token <scm> MUSIC_FUNCTION_MARKUP_MUSIC
 400 %token <scm> MUSIC_FUNCTION_MARKUP_MUSIC_MUSIC
 401 %token <scm> MUSIC_FUNCTION_MUSIC
 402 %token <scm> MUSIC_FUNCTION_MUSIC_MUSIC
 403 %token <scm> MUSIC_FUNCTION_SCM
 404 %token <scm> MUSIC_FUNCTION_SCM_MUSIC
 405 %token <scm> MUSIC_FUNCTION_SCM_MUSIC_MUSIC
 406 %token <scm> MUSIC_FUNCTION_SCM_SCM
 407 %token <scm> MUSIC_FUNCTION_SCM_SCM_MUSIC
 408 %token <scm> MUSIC_FUNCTION_SCM_SCM_SCM
 409 %token <scm> MUSIC_IDENTIFIER
 410 %token <scm> NOTENAME_PITCH
 411 %token <scm> NUMBER_IDENTIFIER
 412 %token <scm> OUTPUT_DEF_IDENTIFIER
 413 %token <scm> REAL
 414 %token <scm> RESTNAME
 415 %token <scm> SCM_IDENTIFIER
 416 %token <scm> SCM_T
 417 %token <scm> SCORE_IDENTIFIER
 418 %token <scm> STRING
 419 %token <scm> STRING_IDENTIFIER
 420 %token <scm> TONICNAME_PITCH
 421
 422
 423 %type <book> book_block
 424 %type <book> book_body
 425
 426 %type <i> bare_unsigned
 427 %type <i> figured_bass_alteration
 428 %type <i> dots
 429 %type <i> exclamations
 430 %type <i> optional_rest
 431 %type <i> questions
 432 %type <i> script_dir
 433 %type <i> sub_quotes
 434 %type <i> sup_quotes
 435 %type <i> tremolo_type
 436
 437 %type <music> Composite_music
 438 %type <music> Generic_prefix_music
 439 %type <music> Grouped_music_list
 440 %type <music> Music
 441 %type <music> Prefix_composite_music
 442 %type <music> Repeated_music
 443 %type <music> Sequential_music
 444 %type <music> Simple_music
 445 %type <music> Simultaneous_music
 446 %type <music> chord_body
 447 %type <music> chord_body_element
 448 %type <music> command_element
 449 %type <music> command_event
 450 %type <music> context_change
 451 %type <music> direction_less_event
 452 %type <music> direction_reqd_event
 453 %type <music> event_chord
 454 %type <music> gen_text_def
 455 %type <music> music_property_def
 456 %type <music> note_chord_element
 457 %type <music> post_event
 458 %type <music> re_rhythmed_music
 459 %type <music> relative_music
 460 %type <music> simple_element
 461 %type <music> string_number_event
 462 %type <music> tagged_post_event
 463 %type <music> tempo_event
 464 %type <music> toplevel_music
 465
 466 %type <outputdef> output_def_body
 467 %type <outputdef> output_def_head
 468 %type <outputdef> output_def
 469 %type <outputdef> paper_block
 470
 471 %type <scm> Alternative_music
 472 %type <scm> Generic_prefix_music_scm
 473 %type <scm> Music_list
 474 %type <scm> absolute_pitch
 475 %type <scm> assignment_id
 476 %type <scm> bare_number
 477 %type <scm> bass_figure
 478 %type <scm> figured_bass_modification
 479 %type <scm> br_bass_figure
 480 %type <scm> bass_number
 481 %type <scm> chord_body_elements
 482 %type <scm> chord_item
 483 %type <scm> chord_items
 484 %type <scm> chord_separator
 485 %type <scm> context_def_mod
 486 %type <scm> context_def_spec_block
 487 %type <scm> context_def_spec_body
 488 %type <scm> context_mod
 489 %type <scm> context_mod_list
 490 %type <scm> context_prop_spec
 491 %type <scm> direction_less_char
 492 %type <scm> duration_length
 493 %type <scm> embedded_scm
 494 %type <scm> figure_list
 495 %type <scm> figure_spec
 496 %type <scm> fraction
 497 %type <scm> full_markup
 498 %type <scm> identifier_init
 499 %type <scm> lilypond_header
 500 %type <scm> lilypond_header_body
 501 %type <scm> lyric_element
 502 %type <scm> lyric_markup
 503 %type <scm> markup
 504 %type <scm> markup_braced_list
 505 %type <scm> markup_braced_list_body
 506 %type <scm> markup_composed_list
 507 %type <scm> markup_head_1_item
 508 %type <scm> markup_head_1_list
 509 %type <scm> markup_list
 510 %type <scm> markup_top
 511 %type <scm> mode_changing_head
 512 %type <scm> mode_changing_head_with_context
 513 %type <scm> multiplied_duration
 514 %type <scm> new_chord
 515 %type <scm> new_lyrics
 516 %type <scm> number_expression
 517 %type <scm> number_factor
 518 %type <scm> number_term
 519 %type <scm> object_id_setting
 520 %type <scm> octave_check
 521 %type <scm> optional_context_mod
 522 %type <scm> optional_notemode_duration
 523 %type <scm> pitch
 524 %type <scm> pitch_also_in_chords
 525 %type <scm> post_events
 526 %type <scm> property_operation
 527 %type <scm> scalar
 528 %type <scm> script_abbreviation
 529 %type <scm> simple_markup
 530 %type <scm> simple_string
 531 %type <scm> steno_duration
 532 %type <scm> steno_pitch
 533 %type <scm> steno_tonic_pitch
 534 %type <scm> step_number
 535 %type <scm> step_numbers
 536 %type <scm> string
 537
 538 %type <score> score_block
 539 %type <score> score_body
 540
 541
 542 %left '-' '+'
 543
 544 /* We don't assign precedence to / and *, because we might need varied
 545 prec levels in different prods */
 546
 547 %left UNARY_MINUS
 548
 549 %%
 550
 551 lilypond:       /* empty */
 552         | lilypond toplevel_expression {
 553         }
 554         | lilypond assignment {
 555         }
 556         | lilypond error {
 557                 THIS->error_level_ = 1;
 558         }
 559         | lilypond INVALID      {
 560                 THIS->error_level_ = 1;
 561         }
 562         ;
 563
 564
 565 object_id_setting:
 566         OBJECTID STRING { $$ = $2; }
 567         ;
 568
 569 toplevel_expression:
 570         lilypond_header {
 571                 THIS->lexer_->set_identifier (ly_symbol2scm ("$defaultheader"), $1);
 572         }
 573         | add_quote {
 574
 575         }
 576         | book_block {
 577                 Book *book = $1;
 578                 SCM proc = THIS->lexer_->lookup_identifier ("toplevel-book-handler");
 579                 scm_call_2 (proc, THIS->self_scm (), book->self_scm ());
 580                 book->unprotect ();
 581         }
 582         | score_block {
 583                 Score *score = $1;
 584
 585                 SCM proc = THIS->lexer_->lookup_identifier ("toplevel-score-handler");
 586                 scm_call_2 (proc, THIS->self_scm (), score->self_scm ());
 587                 score->unprotect ();
 588         }
 589         | toplevel_music {
 590                 Music *music = $1;
 591                 SCM proc = THIS->lexer_->lookup_identifier ("toplevel-music-handler");
 592                 scm_call_2 (proc, THIS->self_scm (), music->self_scm ());
 593                 music->unprotect ();
 594         }
 595         | full_markup {
 596                 SCM proc = THIS->lexer_->lookup_identifier ("toplevel-text-handler");
 597                 scm_call_2 (proc, THIS->self_scm (), $1);
 598         }
 599         | output_def {
 600                 SCM id = SCM_EOL;
 601                 Output_def * od = $1;
 602
 603                 if ($1->c_variable ("is-paper") == SCM_BOOL_T)
 604                         id = ly_symbol2scm ("$defaultpaper");
 605                 else if ($1->c_variable ("is-midi") == SCM_BOOL_T)
 606                         id = ly_symbol2scm ("$defaultmidi");
 607                 else if ($1->c_variable ("is-layout") == SCM_BOOL_T)
 608                         id = ly_symbol2scm ("$defaultlayout");
 609
 610                 THIS->lexer_->set_identifier (id, od->self_scm ());
 611                 od->unprotect();
 612         }
 613         ;
 614
 615 toplevel_music:
 616         Composite_music {
 617         }
 618         ;
 619
 620 embedded_scm:
 621         SCM_T
 622         | SCM_IDENTIFIER
 623         ;
 624
 625
 626 lilypond_header_body:
 627         {
 628                 $$ = get_header(THIS);
 629                 THIS->lexer_->add_scope ($$);
 630         }
 631         | lilypond_header_body assignment  {
 632
 633         }
 634         ;
 635
 636 lilypond_header:
 637         HEADER '{' lilypond_header_body '}'     {
 638                 $$ = THIS->lexer_->remove_scope ();
 639         }
 640         ;
 641
 642 /*
 643         DECLARATIONS
 644 */
 645 assignment_id:
 646         STRING          { $$ = $1; }
 647         | LYRICS_STRING { $$ = $1; }
 648         ;
 649
 650 assignment:
 651         assignment_id '=' identifier_init  {
 652                 if (! is_regular_identifier ($1))
 653                 {
 654                         @1.warning (_ ("identifier should have alphabetic characters only"));
 655                 }
 656
 657                 THIS->lexer_->set_identifier ($1, $3);
 658
 659 /*
 660  TODO: devise standard for protection in parser.
 661
 662   The parser stack lives on the C-stack, which means that
 663 all objects can be unprotected as soon as they're here.
 664
 665 */
 666         }
 667         | embedded_scm { }
 668         ;
 669
 670
 671 identifier_init:
 672         score_block {
 673                 $$ = $1->self_scm ();
 674                 $1->unprotect ();
 675         }
 676         | book_block {
 677                 $$ = $1->self_scm ();
 678                 $1->unprotect ();
 679         }
 680         | output_def {
 681                 $$ = $1->self_scm ();
 682                 $1->unprotect ();
 683         }
 684         | context_def_spec_block {
 685                 $$ = $1;
 686         }
 687         | Music  {
 688                 $$ = $1->self_scm ();
 689                 $1->unprotect();
 690         }
 691         | post_event {
 692                 $$ = $1->self_scm ();
 693                 $1->unprotect();
 694         }
 695         | number_expression {
 696                 $$ = $1;
 697         }
 698         | string {
 699                 $$ = $1;
 700         }
 701         | embedded_scm {
 702                 $$ = $1;
 703         }
 704         | full_markup {
 705                 $$ = $1;
 706         }
 707         | DIGIT {
 708                 $$ = scm_from_int ($1);
 709         }
 710         ;
 711
 712 context_def_spec_block:
 713         CONTEXT '{' context_def_spec_body '}'
 714                 {
 715                 $$ = $3;
 716         }
 717         ;
 718
 719 context_def_spec_body:
 720         /**/ {
 721                 $$ = Context_def::make_scm ();
 722                 unsmob_context_def ($$)->set_spot (@$);
 723         }
 724         | CONTEXT_DEF_IDENTIFIER {
 725                 $$ = $1;
 726                 unsmob_context_def ($$)->set_spot (@$);
 727         }
 728         | context_def_spec_body GROBDESCRIPTIONS embedded_scm {
 729                 Context_def*td = unsmob_context_def ($$);
 730
 731                 for (SCM p = $3; scm_is_pair (p); p = scm_cdr (p)) {
 732                         SCM tag = scm_caar (p);
 733
 734                         /* TODO: should make new tag "grob-definition" ? */
 735                         td->add_context_mod (scm_list_3 (ly_symbol2scm ("assign"),
 736                                                         tag, scm_cons (scm_cdar (p), SCM_EOL)));
 737                 }
 738         }
 739         | context_def_spec_body context_mod {
 740                 unsmob_context_def ($$)->add_context_mod ($2);
 741         }
 742         ;
 743
 744
 745
 746 book_block:
 747         BOOK '{' book_body '}'  {
 748                 $$ = $3;
 749         }
 750         ;
 751
 752 /* FIXME:
 753    * Use 'handlers' like for toplevel-* stuff?
 754    * grok \layout and \midi?  */
 755 book_body:
 756         {
 757                 $$ = new Book;
 758                 $$->set_spot (@$);
 759                 $$->paper_ = dynamic_cast<Output_def*> (unsmob_output_def (THIS->lexer_->lookup_identifier ("$defaultpaper"))->clone ());
 760                 $$->paper_->unprotect ();
 761                 $$->header_ = THIS->lexer_->lookup_identifier ("$defaultheader");
 762         }
 763         | BOOK_IDENTIFIER {
 764                 $$ = unsmob_book ($1);
 765                 $$->set_spot (@$);
 766         }
 767         | book_body paper_block {
 768                 $$->paper_ = $2;
 769                 $2->unprotect ();
 770         }
 771         | book_body score_block {
 772                 SCM s = $2->self_scm ();
 773                 $$->add_score (s);
 774                 $2->unprotect();
 775         }
 776         | book_body full_markup {
 777                 $$->add_score ($2);
 778         }
 779         | book_body lilypond_header {
 780                 $$->header_ = $2;
 781         }
 782         | book_body error {
 783                 $$->paper_ = 0;
 784                 $$->scores_ = SCM_EOL;
 785         }
 786         | book_body object_id_setting {
 787                 $$->user_key_ = ly_scm2string ($2);
 788         }
 789         ;
 790
 791 score_block:
 792         SCORE '{' score_body '}'        {
 793                 $$ = $3;
 794         }
 795         ;
 796
 797 score_body:
 798         Music {
 799                 SCM m = $1->self_scm ();
 800                 $1->unprotect();
 801                 SCM scorify = ly_lily_module_constant ("scorify-music");
 802                 SCM score = scm_call_2 (scorify, m, THIS->self_scm ());
 803
 804                 // pass ownernship to C++ again.
 805                 $$ = unsmob_score (score);
 806                 $$->protect ();
 807                 $$->set_spot (@$);
 808         }
 809         | SCORE_IDENTIFIER {
 810                 $$ = unsmob_score ($1);
 811                 $$->set_spot (@$);
 812         }
 813         | score_body object_id_setting {
 814                 $$->user_key_ = ly_scm2string ($2);
 815         }
 816         | score_body lilypond_header    {
 817                 $$->header_ = $2;
 818         }
 819         | score_body output_def {
 820                 if ($2->lookup_variable (ly_symbol2scm ("is-paper")) == SCM_BOOL_T)
 821                 {
 822                         THIS->parser_error (@2, _("\\paper cannot be used in \\score, use \\layout instead"));
 823
 824                 }
 825                 else
 826                 {
 827                         $$->defs_.push ($2);
 828                 }
 829                 $2->unprotect ();
 830         }
 831         | score_body error {
 832                 $$->error_found_ = true;
 833         }
 834         ;
 835
 836
 837 /*
 838         OUTPUT DEF
 839 */
 840
 841 paper_block:
 842         output_def {
 843                 $$ = $1;
 844                 if ($$->lookup_variable (ly_symbol2scm ("is-paper")) != SCM_BOOL_T)
 845                 {
 846                         THIS->parser_error (@1, _ ("need \\paper for paper block"));
 847                         $$ = get_paper (THIS);
 848                 }
 849         }
 850         ;
 851
 852
 853 output_def:
 854         output_def_body '}' {
 855                 $$ = $1;
 856
 857                 THIS->lexer_->remove_scope ();
 858                 THIS->lexer_->pop_state ();
 859         }
 860         ;
 861
 862 output_def_head:
 863         PAPER {
 864                 $$ = get_paper (THIS);
 865                 $$->input_origin_ = @$;
 866                 THIS->lexer_->add_scope ($$->scope_);
 867         }
 868         | MIDI    {
 869                 Output_def *p = get_midi (THIS);
 870                 $$ = p;
 871                 THIS->lexer_->add_scope (p->scope_);
 872         }
 873         | LAYOUT        {
 874                 Output_def *p = get_layout (THIS);
 875
 876                 THIS->lexer_->add_scope (p->scope_);
 877                 $$ = p;
 878         }
 879         ;
 880
 881
 882 output_def_body:
 883         output_def_head '{' {
 884                 $$ = $1;
 885                 $$->input_origin_.set_spot (@$);
 886                 THIS->lexer_->push_initial_state ();
 887         }
 888         | output_def_head '{' OUTPUT_DEF_IDENTIFIER     {
 889                 $1->unprotect ();
 890                 Output_def *o = unsmob_output_def ($3);
 891                 o->input_origin_.set_spot (@$);
 892                 $$ = o;
 893                 THIS->lexer_->remove_scope ();
 894                 THIS->lexer_->add_scope (o->scope_);
 895                 THIS->lexer_->push_initial_state ();
 896         }
 897         | output_def_body assignment  {
 898
 899         }
 900         | output_def_body context_def_spec_block        {
 901                 assign_context_def ($$, $2);
 902         }
 903         | output_def_body tempo_event  {
 904                 /*
 905                         junk this ? there already is tempo stuff in
 906                         music.
 907                 */
 908                 int m = scm_to_int ($2->get_property ("metronome-count"));
 909                 Duration *d = unsmob_duration ($2->get_property ("tempo-unit"));
 910                 set_tempo ($$, d->get_length (), m);
 911                 $2->unprotect ();
 912         }
 913         | output_def_body error {
 914
 915         }
 916         ;
 917
 918 tempo_event:
 919         TEMPO steno_duration '=' bare_unsigned  {
 920                 $$ = MY_MAKE_MUSIC ("MetronomeChangeEvent");
 921                 $$->set_property ("tempo-unit", $2);
 922                 $$->set_property ("metronome-count", scm_from_int ( $4));
 923         }
 924         ;
 925
 926 /*
 927 The representation of a  list is the
 928
 929   (LIST . LAST-CONS)
 930
 931  to have efficient append.  */
 932
 933 Music_list:
 934         /* empty */ {
 935                 $$ = scm_cons (SCM_EOL, SCM_EOL);
 936         }
 937         | Music_list Music {
 938                 SCM s = $$;
 939                 SCM c = scm_cons ($2->self_scm (), SCM_EOL);
 940                 $2->unprotect (); /* UGH */
 941
 942                 if (scm_is_pair (scm_cdr (s)))
 943                         scm_set_cdr_x (scm_cdr (s), c); /* append */
 944                 else
 945                         scm_set_car_x (s, c); /* set first cons */
 946                 scm_set_cdr_x (s, c);  /* remember last cell */
 947         }
 948         | Music_list embedded_scm {
 949
 950         }
 951         | Music_list error {
 952                 Music * m = MY_MAKE_MUSIC("Music");
 953                 // ugh. code dup
 954                 m->set_property ("error-found", SCM_BOOL_T);
 955                 SCM s = $$;
 956                 SCM c = scm_cons (m->self_scm (), SCM_EOL);
 957                 m->unprotect (); /* UGH */
 958
 959                 if (scm_is_pair (scm_cdr (s)))
 960                         scm_set_cdr_x (scm_cdr (s), c); /* append */
 961                 else
 962                         scm_set_car_x (s, c); /* set first cons */
 963                 scm_set_cdr_x (s, c);  /* remember last cell */
 964         }
 965         ;
 966
 967 Music:
 968         Simple_music
 969         | Composite_music
 970         ;
 971
 972 Alternative_music:
 973         /* empty */ {
 974                 $$ = SCM_EOL;
 975         }
 976         | ALTERNATIVE '{' Music_list '}' {
 977                 $$ = $3;
 978         }
 979         ;
 980
 981
 982 Repeated_music:
 983         REPEAT simple_string bare_unsigned Music Alternative_music
 984         {
 985                 Music *beg = $4;
 986                 int times = $3;
 987                 SCM alts = scm_is_pair ($5) ? scm_car ($5) : SCM_EOL;
 988                 if (times < scm_ilength (alts)) {
 989                   unsmob_music (scm_car (alts))
 990                     ->origin ()->warning (
 991                     _ ("more alternatives than repeats"));
 992                     warning ("junking excess alternatives");
 993                   alts = ly_truncate_list (times, alts);
 994                 }
 995
 996
 997                 SCM proc = ly_lily_module_constant ("make-repeated-music");
 998
 999                 SCM mus = scm_call_1 (proc, $2);
1000                 Music *r = unsmob_music (mus);
1001                 r->protect ();
1002                 if (beg)
1003                         {
1004                         r-> set_property ("element", beg->self_scm ());
1005                         beg->unprotect ();
1006                         }
1007                 r->set_property ("repeat-count", scm_from_int (max (times, 1)));
1008
1009                 r-> set_property ("elements",alts);
1010                 if (ly_is_equal ($2, scm_makfrom0str ("tremolo"))) {
1011                         /*
1012                         TODO: move this code to Scheme.
1013                         */
1014
1015                         /* we cannot get durations and other stuff
1016                            correct down the line,
1017                            so we have to add to the duration log here. */
1018                         SCM func = ly_lily_module_constant ("shift-duration-log");
1019
1020                         int dots = ($3 % 3) ? 0 : 1;
1021                         int shift = -intlog2 ((dots) ? ($3*2/3) : $3);
1022
1023
1024                         if ($4->is_mus_type ("sequential-music"))
1025                         {
1026                                 int list_len = scm_ilength ($4->get_property ("elements"));
1027                                 if (list_len != 2)
1028                                         $4->origin ()->warning (_f ("expect 2 elements for Chord tremolo, found %d", list_len));
1029                                 shift -= 1;
1030                                 r->compress (Moment (Rational (1, list_len)));
1031                         }
1032                         scm_call_3 (func, r->self_scm (), scm_from_int (shift), scm_from_int (dots));
1033
1034                 }
1035                 r->set_spot (*$4->origin ());
1036
1037                 $$ = r;
1038         }
1039         ;
1040
1041 Sequential_music:
1042         SEQUENTIAL '{' Music_list '}'           {
1043                 $$ = MY_MAKE_MUSIC ("SequentialMusic");
1044                 $$->set_property ("elements", scm_car ($3));
1045                 $$->set_spot (@$);
1046         }
1047         | '{' Music_list '}'            {
1048                 $$ = MY_MAKE_MUSIC ("SequentialMusic");
1049                 $$->set_property ("elements", scm_car ($2));
1050                 $$->set_spot (@$);
1051         }
1052         ;
1053
1054 Simultaneous_music:
1055         SIMULTANEOUS '{' Music_list '}'{
1056                 $$ = MY_MAKE_MUSIC ("SimultaneousMusic");
1057                 $$->set_property ("elements", scm_car ($3));
1058                 $$->set_spot (@$);
1059
1060         }
1061         | simul_open Music_list simul_close     {
1062                 $$ = MY_MAKE_MUSIC ("SimultaneousMusic");
1063                 $$->set_property ("elements", scm_car ($2));
1064                 $$->set_spot (@$);
1065         }
1066         ;
1067
1068 Simple_music:
1069         event_chord             { $$ = $1; }
1070         | MUSIC_IDENTIFIER {
1071                 $$ = unsmob_music ($1);
1072         }
1073         | music_property_def
1074         | context_change
1075         ;
1076
1077
1078 optional_context_mod:
1079         /**/ { $$ = SCM_EOL; }
1080         | WITH { THIS->lexer_->push_initial_state (); }
1081         '{' context_mod_list '}'
1082         {
1083                 THIS->lexer_->pop_state ();
1084                 $$ = $4;
1085         }
1086         ;
1087
1088 context_mod_list:
1089         /* */  { $$ = SCM_EOL; }
1090         | context_mod_list context_mod  {
1091                  $$ = scm_cons ($2, $1);
1092         }
1093         ;
1094
1095
1096 Composite_music:
1097         Prefix_composite_music { $$ = $1; }
1098         | Grouped_music_list { $$ = $1; }
1099         ;
1100
1101 Grouped_music_list:
1102         Simultaneous_music              { $$ = $1; }
1103         | Sequential_music              { $$ = $1; }
1104         ;
1105
1106 Generic_prefix_music_scm:
1107         MUSIC_FUNCTION {
1108                 $$ = scm_list_2 ($1, make_input (@$));
1109         }
1110         | MUSIC_FUNCTION_SCM embedded_scm {
1111                 $$ = scm_list_3 ($1, make_input (@$), $2);
1112         }
1113         | MUSIC_FUNCTION_MARKUP full_markup {
1114                 $$ = scm_list_3 ($1, make_input (@$), $2);
1115         }
1116         | MUSIC_FUNCTION_MUSIC Music {
1117                 $$ = scm_list_3 ($1, make_input (@$), $2->self_scm ());
1118                 $2->unprotect ();
1119         }
1120         | MUSIC_FUNCTION_SCM_MUSIC embedded_scm Music {
1121                 $$ = scm_list_4 ($1, make_input (@$), $2, $3->self_scm ());
1122                 $3->unprotect ();
1123         }
1124         | MUSIC_FUNCTION_SCM_SCM embedded_scm embedded_scm {
1125                 $$ = scm_list_4 ($1, make_input (@$), $2, $3);
1126         }
1127         | MUSIC_FUNCTION_SCM_SCM_SCM embedded_scm embedded_scm embedded_scm {
1128                 $$ = scm_list_5 ($1, make_input (@$), $2, $3, $4);
1129         }
1130         | MUSIC_FUNCTION_SCM_SCM_MUSIC embedded_scm embedded_scm Music {
1131                 $$ = scm_list_5 ($1, make_input (@$), $2, $3, $4->self_scm ());
1132         }
1133         | MUSIC_FUNCTION_MARKUP_MUSIC full_markup Music {
1134                 $$ = scm_list_4 ($1, make_input (@$), $2, $3->self_scm ());
1135                 $3->unprotect ();
1136         }
1137         | MUSIC_FUNCTION_MARKUP_MARKUP full_markup full_markup {
1138                 $$ = scm_list_4 ($1, make_input (@$), $2, $3);
1139         }
1140         | MUSIC_FUNCTION_MUSIC_MUSIC Music Music {
1141                 $$ = scm_list_4 ($1, make_input (@$), $2->self_scm (), $3->self_scm ());
1142                 $2->unprotect ();
1143                 $3->unprotect ();
1144         }
1145         | MUSIC_FUNCTION_SCM_MUSIC_MUSIC embedded_scm Music Music {
1146                 $$ = scm_list_5 ($1, make_input (@$), $2, $3->self_scm (), $4->self_scm ());
1147                 $4->unprotect ();
1148                 $3->unprotect ();
1149         }
1150         | MUSIC_FUNCTION_MARKUP_MUSIC_MUSIC full_markup Music Music {
1151                 $$ = scm_list_5 ($1, make_input (@$), $2, $3->self_scm (), $4->self_scm ());
1152                 $3->unprotect ();
1153                 $4->unprotect ();
1154         }
1155         ;
1156
1157 Generic_prefix_music:
1158         Generic_prefix_music_scm {
1159                 SCM func = scm_car ($1);
1160                 Input *loc = unsmob_input (scm_cadr ($1));
1161                 SCM args = scm_cddr ($1);
1162                 SCM sig = scm_object_property (func, ly_symbol2scm ("music-function-signature"));
1163
1164                 SCM type_check_proc = ly_lily_module_constant ("type-check-list");
1165                 bool ok  = true;
1166
1167                 if (!to_boolean (scm_call_3  (type_check_proc, scm_cadr ($1), sig, args)))
1168                 {
1169                         THIS->error_level_ = 1;
1170                         ok = false;
1171                 }
1172
1173                 SCM m = SCM_EOL;
1174                 if (ok)
1175                         m = scm_apply_0 (func, scm_cons (THIS->self_scm(),
1176                                                          scm_cdr ($1)));
1177
1178                 if (unsmob_music (m))
1179                         {
1180                         $$ = unsmob_music (m);
1181                         $$->protect ();
1182                         }
1183                 else
1184                         {
1185                         if (ok)
1186                                 loc->error (_ ("music head function must return Music object"));
1187                         $$ = MY_MAKE_MUSIC ("Music");
1188                         }
1189                 $$->set_spot (*loc);
1190         }
1191         ;
1192
1193
1194 Prefix_composite_music:
1195         Generic_prefix_music {
1196                 $$ = $1;
1197         }
1198         | CONTEXT simple_string '=' simple_string optional_context_mod Music {
1199                 $$ = context_spec_music ($2, $4, $6, $5);
1200
1201         }
1202         | CONTEXT simple_string optional_context_mod Music {
1203                 $$ = context_spec_music ($2, SCM_UNDEFINED, $4, $3);
1204         }
1205         | NEWCONTEXT simple_string optional_context_mod Music {
1206                 $$ = context_spec_music ($2, get_next_unique_context_id (), $4,
1207                         $3);
1208         }
1209
1210         | TIMES fraction Music
1211
1212         {
1213                 int n = scm_to_int (scm_car ($2)); int d = scm_to_int (scm_cdr ($2));
1214                 Music *mp = $3;
1215
1216                 $$= MY_MAKE_MUSIC ("TimeScaledMusic");
1217                 $$->set_spot (@$);
1218
1219                 $$->set_property ("element", mp->self_scm ());
1220                 mp->unprotect();
1221                 $$->set_property ("numerator", scm_from_int (n));
1222                 $$->set_property ("denominator", scm_from_int (d));
1223                 $$->compress (Moment (Rational (n,d)));
1224
1225         }
1226         | Repeated_music                { $$ = $1; }
1227         | TRANSPOSE pitch_also_in_chords pitch_also_in_chords Music {
1228                 $$ = MY_MAKE_MUSIC ("TransposedMusic");
1229                 Music *p = $4;
1230                 Pitch from = *unsmob_pitch ($2);
1231                 Pitch to = *unsmob_pitch ($3);
1232
1233                 p->transpose (pitch_interval (from, to));
1234                 $$->set_property ("element", p->self_scm ());
1235                 p->unprotect();
1236         }
1237         | mode_changing_head Grouped_music_list {
1238                 if ($1 == ly_symbol2scm ("chords"))
1239                 {
1240                   Music *chm = MY_MAKE_MUSIC ("UnrelativableMusic");
1241                   chm->set_property ("element", $2->self_scm ());
1242                   $$ = chm;
1243                   $2->unprotect();
1244                 }
1245                 else
1246                 {
1247                   $$ = $2;
1248                 }
1249                 THIS->lexer_->pop_state ();
1250         }
1251         | mode_changing_head_with_context optional_context_mod Grouped_music_list {
1252                 $$ = context_spec_music ($1, get_next_unique_context_id (),
1253                                          $3, $2);
1254                 if ($1 == ly_symbol2scm ("ChordNames"))
1255                 {
1256                   Music *chm = MY_MAKE_MUSIC ("UnrelativableMusic");
1257                   chm->set_property ("element", $$->self_scm ());
1258                   $$->unprotect();
1259                   $$ = chm;
1260                 }
1261                 THIS->lexer_->pop_state ();
1262         }
1263         | relative_music        { $$ = $1; }
1264         | re_rhythmed_music     { $$ = $1; }
1265         | TAG embedded_scm Music {
1266                 tag_music ($3, $2, @$);
1267                 $$ = $3;
1268         }
1269         ;
1270
1271 mode_changing_head:
1272         NOTEMODE {
1273                 SCM nn = THIS->lexer_->lookup_identifier ("pitchnames");
1274                 THIS->lexer_->push_note_state (alist_to_hashq (nn));
1275
1276                 $$ = ly_symbol2scm ("notes");
1277         }
1278         | DRUMMODE
1279                 {
1280                 SCM nn = THIS->lexer_->lookup_identifier ("drumPitchNames");
1281                 THIS->lexer_->push_note_state (alist_to_hashq (nn));
1282
1283                 $$ = ly_symbol2scm ("drums");
1284         }
1285         | FIGUREMODE {
1286                 THIS->lexer_->push_figuredbass_state ();
1287
1288                 $$ = ly_symbol2scm ("figures");
1289         }
1290         | CHORDMODE {
1291                 SCM nn = THIS->lexer_->lookup_identifier ("chordmodifiers");
1292                 THIS->lexer_->chordmodifier_tab_ = alist_to_hashq (nn);
1293                 nn = THIS->lexer_->lookup_identifier ("pitchnames");
1294                 THIS->lexer_->push_chord_state (alist_to_hashq (nn));
1295                 $$ = ly_symbol2scm ("chords");
1296
1297         }
1298         | LYRICMODE
1299                 { THIS->lexer_->push_lyric_state ();
1300                 $$ = ly_symbol2scm ("lyrics");
1301         }
1302         ;
1303
1304 mode_changing_head_with_context:
1305         DRUMS {
1306                 SCM nn = THIS->lexer_->lookup_identifier ("drumPitchNames");
1307                 THIS->lexer_->push_note_state (alist_to_hashq (nn));
1308
1309                 $$ = ly_symbol2scm ("DrumStaff");
1310         }
1311         | FIGURES {
1312                 THIS->lexer_->push_figuredbass_state ();
1313
1314                 $$ = ly_symbol2scm ("FiguredBass");
1315         }
1316         | CHORDS {
1317                 SCM nn = THIS->lexer_->lookup_identifier ("chordmodifiers");
1318                 THIS->lexer_->chordmodifier_tab_ = alist_to_hashq (nn);
1319                 nn = THIS->lexer_->lookup_identifier ("pitchnames");
1320                 THIS->lexer_->push_chord_state (alist_to_hashq (nn));
1321                 $$ = ly_symbol2scm ("ChordNames");
1322         }
1323         | LYRICS
1324                 { THIS->lexer_->push_lyric_state ();
1325                 $$ = ly_symbol2scm ("Lyrics");
1326         }
1327         ;
1328
1329
1330 relative_music:
1331         RELATIVE absolute_pitch Music {
1332                 Music *m = $3;
1333                 Pitch start = *unsmob_pitch ($2);
1334                 $$ = make_music_relative (start, m);
1335                 m->unprotect();
1336         }
1337         | RELATIVE Composite_music {
1338                 Music *m = $2;
1339
1340                 Pitch middle_c (0, 0, 0);
1341                 $$ = make_music_relative (middle_c, m);
1342                 m->unprotect();
1343         }
1344         ;
1345
1346 new_lyrics:
1347         ADDLYRICS { THIS->lexer_->push_lyric_state (); }
1348         /*cont */
1349         Grouped_music_list {
1350         /* Can also use Music at the expensive of two S/Rs similar to
1351            \repeat \alternative */
1352                 THIS->lexer_->pop_state ();
1353
1354                 $$ = scm_cons ($3->self_scm (), SCM_EOL);
1355         }
1356         | new_lyrics ADDLYRICS {
1357                 THIS->lexer_->push_lyric_state ();
1358         } Grouped_music_list {
1359                 THIS->lexer_->pop_state ();
1360                 $$ = scm_cons ($4->self_scm (), $1);
1361         }
1362         ;
1363
1364 re_rhythmed_music:
1365         Grouped_music_list new_lyrics {
1366                 Music * voice = $1;
1367                 SCM name = get_first_context_id (scm_makfrom0str ("Voice"), voice);
1368                 if (!scm_is_string (name))
1369                 {
1370                         name = get_next_unique_lyrics_context_id ();
1371                         voice = context_spec_music (scm_makfrom0str ("Voice"),
1372                                                     name,
1373                                                     voice, SCM_EOL);
1374                 }
1375
1376                 SCM context = scm_makfrom0str ("Lyrics");
1377                 Music *all = MY_MAKE_MUSIC ("SimultaneousMusic");
1378
1379                 SCM lst = SCM_EOL;
1380                 for (SCM s = $2; scm_is_pair (s); s = scm_cdr (s))
1381                 {
1382                         Music *music = unsmob_music (scm_car (s));
1383                         Music *com = make_lyric_combine_music (name, music);
1384                         Music *csm = context_spec_music (context,
1385                                 get_next_unique_context_id (), com, SCM_EOL);
1386                         lst = scm_cons (csm->self_scm (), lst);
1387                 }
1388                 all->set_property ("elements", scm_cons (voice->self_scm (),
1389                         lst));
1390                 $$ = all;
1391                 voice->unprotect ();
1392         }
1393         | LYRICSTO simple_string {
1394                 THIS->lexer_->push_lyric_state ();
1395         } Music {
1396                 THIS->lexer_->pop_state ();
1397                 Music *music = $4;
1398                 SCM name = $2;
1399                 $$ = make_lyric_combine_music (name, music);
1400                 music->unprotect();
1401         }
1402         ;
1403
1404 context_change:
1405         CHANGE STRING '=' STRING  {
1406                 Music*t = MY_MAKE_MUSIC ("ContextChange");
1407                 t-> set_property ("change-to-type", scm_string_to_symbol ($2));
1408                 t-> set_property ("change-to-id", $4);
1409
1410                 $$ = t;
1411                 $$->set_spot (@$);
1412         }
1413         ;
1414
1415 property_operation:
1416         STRING '=' scalar {
1417                 $$ = scm_list_3 (ly_symbol2scm ("assign"),
1418                         scm_string_to_symbol ($1), $3);
1419         }
1420         | UNSET simple_string {
1421                 $$ = scm_list_2 (ly_symbol2scm ("unset"),
1422                         scm_string_to_symbol ($2));
1423         }
1424         | OVERRIDE simple_string embedded_scm '=' embedded_scm {
1425                 $$ = scm_list_4 (ly_symbol2scm ("push"),
1426                         scm_string_to_symbol ($2), $5, $3);
1427         }
1428         | OVERRIDE simple_string embedded_scm embedded_scm '=' embedded_scm {
1429                 $$ = scm_list_5 (ly_symbol2scm ("push"),
1430                                 scm_string_to_symbol ($2), $6, $4, $3);
1431         }
1432         | REVERT simple_string embedded_scm {
1433                 $$ = scm_list_3 (ly_symbol2scm ("pop"),
1434                         scm_string_to_symbol ($2), $3);
1435         }
1436         ;
1437
1438 context_def_mod:
1439         CONSISTS { $$ = ly_symbol2scm ("consists"); }
1440         | REMOVE { $$ = ly_symbol2scm ("remove"); }
1441
1442         | ACCEPTS { $$ = ly_symbol2scm ("accepts"); }
1443         | DEFAULTCHILD { $$ = ly_symbol2scm ("default-child"); }
1444         | DENIES { $$ = ly_symbol2scm ("denies"); }
1445
1446         | ALIAS { $$ = ly_symbol2scm ("alias"); }
1447         | TYPE { $$ = ly_symbol2scm ("translator-type"); }
1448         | DESCRIPTION { $$ = ly_symbol2scm ("description"); }
1449         | NAME { $$ = ly_symbol2scm ("context-name"); }
1450         ;
1451
1452 context_mod:
1453         property_operation { $$ = $1; }
1454         | context_def_mod STRING {
1455                 $$ = scm_list_2 ($1, $2);
1456         }
1457         ;
1458
1459 context_prop_spec:
1460         simple_string {
1461                 if (!is_regular_identifier ($1))
1462                 {
1463                         @$.error (_("Grob name should be alphanumeric"));
1464                 }
1465
1466                 $$ = scm_list_2 (ly_symbol2scm ("Bottom"),
1467                         scm_string_to_symbol ($1));
1468         }
1469         | simple_string '.' simple_string {
1470                 $$ = scm_list_2 (scm_string_to_symbol ($1),
1471                         scm_string_to_symbol ($3));
1472         }
1473         ;
1474
1475 music_property_def:
1476         OVERRIDE context_prop_spec embedded_scm '=' scalar {
1477                 $$ = property_op_to_music (scm_list_4 (
1478                         ly_symbol2scm ("push"),
1479                         scm_cadr ($2),
1480                         $5, $3));
1481                 $$ = context_spec_music (scm_car ($2), SCM_UNDEFINED, $$, SCM_EOL);
1482         }
1483         | OVERRIDE context_prop_spec embedded_scm  embedded_scm '=' scalar {
1484                 $$ = property_op_to_music (scm_list_5 (
1485                         ly_symbol2scm ("push"),
1486                         scm_cadr ($2),
1487                         $6, $4, $3));
1488                 $$ = context_spec_music (scm_car ($2), SCM_UNDEFINED, $$, SCM_EOL);
1489         }
1490         | REVERT context_prop_spec embedded_scm {
1491                 $$ = property_op_to_music (scm_list_3 (
1492                         ly_symbol2scm ("pop"),
1493                         scm_cadr ($2),
1494                         $3));
1495
1496                 $$= context_spec_music (scm_car ($2), SCM_UNDEFINED, $$, SCM_EOL);
1497         }
1498         | SET context_prop_spec '=' scalar {
1499                 $$ = property_op_to_music (scm_list_3 (
1500                         ly_symbol2scm ("assign"),
1501                         scm_cadr ($2),
1502                         $4));
1503                 $$= context_spec_music (scm_car ($2), SCM_UNDEFINED, $$, SCM_EOL);
1504         }
1505         | UNSET context_prop_spec {
1506                 $$ = property_op_to_music (scm_list_2 (
1507                         ly_symbol2scm ("unset"),
1508                         scm_cadr ($2)));
1509                 $$= context_spec_music (scm_car ($2), SCM_UNDEFINED, $$, SCM_EOL);
1510         }
1511         | ONCE music_property_def {
1512                 SCM e = $2->get_property ("element");
1513                 unsmob_music (e)->set_property ("once", SCM_BOOL_T);
1514                 $$ = $2;
1515
1516         }
1517         ;
1518
1519
1520 string:
1521         STRING {
1522                 $$ = $1;
1523         }
1524         | STRING_IDENTIFIER {
1525                 $$ = $1;
1526         }
1527         | string '+' string {
1528                 $$ = scm_string_append (scm_list_2 ($1, $3));
1529         }
1530         ;
1531
1532 simple_string: STRING {
1533                 $$ = $1;
1534         }
1535         | LYRICS_STRING {
1536                 $$ = $1;
1537         }
1538         | STRING_IDENTIFIER {
1539                 $$ = $1;
1540         }
1541         ;
1542
1543 scalar: string {
1544                 $$ = $1;
1545         }
1546         | LYRICS_STRING {
1547                 $$ = $1;
1548         }
1549         | bare_number {
1550                 $$ = $1;
1551         }
1552         | embedded_scm {
1553                 $$ = $1;
1554         }
1555         | full_markup {
1556                 $$ = $1;
1557         }
1558         | DIGIT {
1559                 $$ = scm_from_int ($1);
1560         }
1561         ;
1562
1563 /*
1564
1565 pre_events doesn't contain anything. It is a trick:
1566
1567 Adding pre_events to the simple_element
1568 makes the choice between
1569
1570   string:  STRING
1571
1572 and
1573
1574   simple_element: STRING
1575
1576 a single shift/reduction conflict.
1577
1578 nevertheless, this is not very clean, and we should find a different
1579 solution.
1580
1581 */
1582 pre_events: /* empty */
1583         ;
1584
1585 event_chord:
1586         pre_events simple_element post_events   {
1587                 SCM elts = $2-> get_property ("elements");
1588
1589                 elts = ly_append2 (elts, scm_reverse_x ($3, SCM_EOL));
1590
1591                 $2->set_property ("elements", elts);
1592                 /* why is this giving wrong start location? -ns
1593                  * $2->set_spot (@$); */
1594                 Input i;
1595                 i.set_location (@2, @3);
1596                 $2->set_spot (i);
1597                 $$ = $2;
1598         }
1599         | command_element
1600         | note_chord_element
1601         ;
1602
1603
1604 note_chord_element:
1605         chord_body optional_notemode_duration post_events
1606         {
1607                 SCM dur = unsmob_duration ($2)->smobbed_copy ();
1608                 SCM es = $1->get_property ("elements");
1609                 SCM postevs = scm_reverse_x ($3, SCM_EOL);
1610
1611                 for (SCM s = es; scm_is_pair (s); s = scm_cdr (s))
1612                   unsmob_music (scm_car (s))->set_property ("duration", dur);
1613                 es = ly_append2 (es, postevs);
1614
1615                 $1-> set_property ("elements", es);
1616                 $1->set_spot (@$);
1617                 $$ = $1;
1618         }
1619         ;
1620
1621 chord_open: '<'
1622         ;
1623
1624 chord_close: '>'
1625         ;
1626
1627 simul_open: DOUBLE_ANGLE_OPEN
1628         ;
1629
1630 simul_close: DOUBLE_ANGLE_CLOSE
1631         ;
1632
1633 chord_body:
1634         chord_open chord_body_elements chord_close
1635         {
1636                 $$ = MY_MAKE_MUSIC ("EventChord");
1637                 $$->set_spot (@$);
1638                 $$->set_property ("elements",
1639                         scm_reverse_x ($2, SCM_EOL));
1640         }
1641         ;
1642
1643 chord_body_elements:
1644         /* empty */             { $$ = SCM_EOL; }
1645         | chord_body_elements chord_body_element {
1646                 $$ = scm_cons ($2->self_scm (), $1);
1647                 $2->unprotect ();
1648         }
1649         ;
1650
1651 chord_body_element:
1652         pitch exclamations questions octave_check post_events
1653         {
1654                 int q = $3;
1655                 int ex = $2;
1656                 SCM check = $4;
1657                 SCM post = $5;
1658
1659                 Music *n = MY_MAKE_MUSIC ("NoteEvent");
1660                 n->set_property ("pitch", $1);
1661                 n->set_spot (@$);
1662                 if (q % 2)
1663                         n->set_property ("cautionary", SCM_BOOL_T);
1664                 if (ex % 2 || q % 2)
1665                         n->set_property ("force-accidental", SCM_BOOL_T);
1666
1667                 if (scm_is_pair (post)) {
1668                         SCM arts = scm_reverse_x (post, SCM_EOL);
1669                         n->set_property ("articulations", arts);
1670                 }
1671                 if (scm_is_number (check))
1672                 {
1673                         int q = scm_to_int (check);
1674                         n->set_property ("absolute-octave", scm_from_int (q-1));
1675                 }
1676
1677
1678                 $$ = n;
1679         }
1680         | DRUM_PITCH post_events {
1681                 Music *n = MY_MAKE_MUSIC ("NoteEvent");
1682                 n->set_property ("duration", $2);
1683                 n->set_property ("drum-type", $1);
1684                 n->set_spot (@$);
1685
1686                 if (scm_is_pair ($2)) {
1687                         SCM arts = scm_reverse_x ($2, SCM_EOL);
1688                         n->set_property ("articulations", arts);
1689                 }
1690                 $$ = n;
1691         }
1692         ;
1693
1694 add_quote:
1695         ADDQUOTE string Music {
1696                 SCM adder = ly_lily_module_constant ("add-quotable");
1697
1698                 scm_call_2 (adder, $2, $3->self_scm ());
1699                 $3->unprotect();
1700         }
1701         ;
1702
1703 command_element:
1704         command_event {
1705                 $$ = MY_MAKE_MUSIC ("EventChord");
1706                 $$->set_property ("elements", scm_cons ($1->self_scm (), SCM_EOL));
1707                 $1->unprotect();
1708
1709                 $$-> set_spot (@$);
1710                 $1-> set_spot (@$);
1711         }
1712         | SKIP duration_length {
1713                 Music *skip = MY_MAKE_MUSIC ("SkipMusic");
1714                 skip->set_property ("duration", $2);
1715                 skip->set_spot (@$);
1716                 $$ = skip;
1717         }
1718         | OCTAVE pitch {
1719                 Music *m = MY_MAKE_MUSIC ("RelativeOctaveCheck");
1720                 $$ = m;
1721                 $$->set_spot (@$);
1722                 $$->set_property ("pitch", $2);
1723         }
1724         | E_BRACKET_OPEN {
1725                 Music *m = MY_MAKE_MUSIC ("LigatureEvent");
1726                 m->set_property ("span-direction", scm_from_int (START));
1727                 m->set_spot (@$);
1728
1729                 $$ = MY_MAKE_MUSIC ("EventChord");
1730                 $$->set_property ("elements", scm_cons (m->self_scm (), SCM_EOL));
1731                 m->unprotect();
1732                 $$->set_spot (@$);
1733         }
1734         | E_BRACKET_CLOSE {
1735                 Music *m = MY_MAKE_MUSIC ("LigatureEvent");
1736                 m->set_property ("span-direction", scm_from_int (STOP));
1737                 m->set_spot (@$);
1738
1739                 $$ = MY_MAKE_MUSIC ("EventChord");
1740                 $$->set_property ("elements", scm_cons (m->self_scm (), SCM_EOL));
1741                 $$->set_spot (@$);
1742                 m->unprotect ();
1743         }
1744         | E_BACKSLASH {
1745                 $$ = MY_MAKE_MUSIC ("VoiceSeparator");
1746                 $$->set_spot (@$);
1747         }
1748         | '|'      {
1749                 SCM pipe = THIS->lexer_->lookup_identifier ("pipeSymbol");
1750
1751                 if (Music * m = unsmob_music (pipe))
1752                         $$ = m->clone ();
1753                 else
1754                         $$ = MY_MAKE_MUSIC ("BarCheck");
1755
1756                 $$->set_spot (@$);
1757         }
1758         | TRANSPOSITION pitch {
1759                 Pitch middle_c;
1760                 Pitch sounds_as_c = pitch_interval (*unsmob_pitch ($2), middle_c);
1761                 $$ = set_property_music (ly_symbol2scm ("instrumentTransposition"),
1762                                          sounds_as_c.smobbed_copy());
1763                 $$->set_spot (@$);
1764                 $$ = context_spec_music (ly_symbol2scm ("Staff"), SCM_UNDEFINED,
1765                         $$, SCM_EOL);
1766         }
1767         | BAR STRING                    {
1768                 Music *t = set_property_music (ly_symbol2scm ("whichBar"), $2);
1769
1770                 Music *csm = context_spec_music (ly_symbol2scm ("Timing"), SCM_UNDEFINED,
1771                                         t, SCM_EOL);
1772                 $$ = context_spec_music (ly_symbol2scm ("Score"), SCM_UNDEFINED, csm, SCM_EOL);
1773                 $$->set_spot (@$);
1774                 t->set_spot (@$);
1775         }
1776         | PARTIAL duration_length       {
1777                 Moment m = - unsmob_duration ($2)->get_length ();
1778                 Music *p = set_property_music (ly_symbol2scm ( "measurePosition"),m.smobbed_copy ());
1779                 p->set_spot (@$);
1780                 p = context_spec_music (ly_symbol2scm ("Timing"), SCM_UNDEFINED,
1781                                         p, SCM_EOL);
1782                 p = context_spec_music (ly_symbol2scm ("Score"), SCM_UNDEFINED,
1783                                         p, SCM_EOL);
1784                 $$ = p;
1785         }
1786         | CLEF STRING  {
1787                 SCM proc = ly_lily_module_constant ("make-clef-set");
1788
1789                 SCM result = scm_call_1 (proc, $2);
1790                 $$ = unsmob_music (result);
1791                 $$->protect ();
1792         }
1793         | TIME_T fraction  {
1794                 SCM proc = ly_lily_module_constant ("make-time-signature-set");
1795
1796                 SCM result = scm_apply_2   (proc, scm_car ($2), scm_cdr ($2), SCM_EOL);
1797                 $$ = unsmob_music (result);
1798                 $$->protect ();
1799         }
1800         | MARK scalar {
1801                 SCM proc = ly_lily_module_constant ("make-mark-set");
1802
1803                 SCM result = scm_call_1 (proc, $2);
1804                 $$ = unsmob_music (result);
1805                 $$->protect ();
1806         }
1807         ;
1808
1809 command_event:
1810         E_TILDE {
1811                 $$ = MY_MAKE_MUSIC ("PesOrFlexaEvent");
1812         }
1813         | MARK DEFAULT  {
1814                 Music *m = MY_MAKE_MUSIC ("MarkEvent");
1815                 $$ = m;
1816         }
1817         | tempo_event {
1818                 $$ = $1;
1819         }
1820         | KEY DEFAULT {
1821                 Music *key = MY_MAKE_MUSIC ("KeyChangeEvent");
1822                 $$ = key;
1823         }
1824         | KEY NOTENAME_PITCH SCM_IDENTIFIER     {
1825
1826                 Music *key = MY_MAKE_MUSIC ("KeyChangeEvent");
1827                 if (scm_ilength ($3) > 0)
1828                 {
1829                         key->set_property ("pitch-alist", $3);
1830                         key->set_property ("tonic", Pitch (0, 0, 0).smobbed_copy ());
1831                         key->transpose (* unsmob_pitch ($2));
1832                 } else {
1833                         THIS->parser_error (@3, _ ("second argument must be pitch list"));
1834                 }
1835
1836                 $$ = key;
1837         }
1838         ;
1839
1840
1841 post_events:
1842         /* empty */ {
1843                 $$ = SCM_EOL;
1844         }
1845         | post_events post_event {
1846                 $2->set_spot (@2);
1847                 $$ = scm_cons ($2->self_scm (), $$);
1848                 $2->unprotect ();
1849         }
1850         | post_events tagged_post_event {
1851                 $2 -> set_spot (@2);
1852                 $$ = scm_cons ($2->self_scm (), $$);
1853                 $2->unprotect ();
1854         }
1855         ;
1856
1857
1858 tagged_post_event:
1859         '-' TAG embedded_scm post_event {
1860                 tag_music ($4, $3, @$);
1861                 $$ = $4;
1862         }
1863         ;
1864
1865
1866 post_event:
1867         direction_less_event {
1868                 $$ = $1;
1869         }
1870         | HYPHEN {
1871                 if (!THIS->lexer_->is_lyric_state ())
1872                         THIS->parser_error (@1, _ ("have to be in Lyric mode for lyrics"));
1873                 $$ = MY_MAKE_MUSIC ("HyphenEvent");
1874         }
1875         | EXTENDER {
1876                 if (!THIS->lexer_->is_lyric_state ())
1877                         THIS->parser_error (@1, _ ("have to be in Lyric mode for lyrics"));
1878                 $$ = MY_MAKE_MUSIC ("ExtenderEvent");
1879         }
1880         | script_dir direction_reqd_event {
1881                 if ($1)
1882                         $2->set_property ("direction", scm_from_int ($1));
1883                 $$ = $2;
1884         }
1885         | script_dir direction_less_event {
1886                 if ($1)
1887                         $2->set_property ("direction", scm_from_int ($1));
1888                 $$ = $2;
1889         }
1890         | string_number_event
1891         ;
1892
1893 string_number_event:
1894         E_UNSIGNED {
1895                 Music *s = MY_MAKE_MUSIC ("StringNumberEvent");
1896                 s->set_property ("string-number", scm_from_int ($1));
1897                 s->set_spot (@$);
1898                 $$ = s;
1899         }
1900         ;
1901
1902 direction_less_char:
1903         '['  {
1904                 $$ = ly_symbol2scm ("bracketOpenSymbol");
1905         }
1906         | ']'  {
1907                 $$ = ly_symbol2scm ("bracketCloseSymbol");
1908         }
1909         | '~'  {
1910                 $$ = ly_symbol2scm ("tildeSymbol");
1911         }
1912         | '('  {
1913                 $$ = ly_symbol2scm ("parenthesisOpenSymbol");
1914         }
1915         | ')'  {
1916                 $$ = ly_symbol2scm ("parenthesisCloseSymbol");
1917         }
1918         | E_EXCLAMATION  {
1919                 $$ = ly_symbol2scm ("escapedExclamationSymbol");
1920         }
1921         | E_OPEN  {
1922                 $$ = ly_symbol2scm ("escapedParenthesisOpenSymbol");
1923         }
1924         | E_CLOSE  {
1925                 $$ = ly_symbol2scm ("escapedParenthesisCloseSymbol");
1926         }
1927         | E_ANGLE_CLOSE  {
1928                 $$ = ly_symbol2scm ("escapedBiggerSymbol");
1929         }
1930         | E_ANGLE_OPEN  {
1931                 $$ = ly_symbol2scm ("escapedSmallerSymbol");
1932         }
1933         ;
1934
1935 direction_less_event:
1936         direction_less_char {
1937                 SCM predefd = THIS->lexer_->lookup_identifier_symbol ($1);
1938                 Music * m = 0;
1939                 if (unsmob_music (predefd))
1940                 {
1941                         m = unsmob_music (predefd)->clone ();
1942                 }
1943                 else
1944                 {
1945                         m = MY_MAKE_MUSIC ("Music");
1946                 }
1947                 m->set_spot (@$);
1948                 $$ = m;
1949         }
1950         | EVENT_IDENTIFIER      {
1951                 $$ = unsmob_music ($1);
1952         }
1953         | tremolo_type  {
1954                Music *a = MY_MAKE_MUSIC ("TremoloEvent");
1955                a->set_spot (@$);
1956                a->set_property ("tremolo-type", scm_from_int ($1));
1957                $$ = a;
1958         }
1959         ;
1960
1961 direction_reqd_event:
1962         gen_text_def {
1963                 $$ = $1;
1964         }
1965         | script_abbreviation {
1966                 SCM s = THIS->lexer_->lookup_identifier ("dash" + ly_scm2string ($1));
1967                 Music *a = MY_MAKE_MUSIC ("ArticulationEvent");
1968                 if (scm_is_string (s))
1969                         a->set_property ("articulation-type", s);
1970                 else THIS->parser_error (@1, _ ("expecting string as script definition"));
1971                 $$ = a;
1972         }
1973         ;
1974
1975 octave_check:
1976         /**/ { $$ = SCM_EOL; }
1977         | '='  { $$ = scm_from_int (0); }
1978         | '=' sub_quotes { $$ = scm_from_int ($2); }
1979         | '=' sup_quotes { $$ = scm_from_int ($2); }
1980         ;
1981
1982 sup_quotes:
1983         '\'' {
1984                 $$ = 1;
1985         }
1986         | sup_quotes '\'' {
1987                 $$ ++;
1988         }
1989         ;
1990
1991 sub_quotes:
1992         ',' {
1993                 $$ = 1;
1994         }
1995         | sub_quotes ',' {
1996                 $$++;
1997         }
1998         ;
1999
2000 steno_pitch:
2001         NOTENAME_PITCH  {
2002                 $$ = $1;
2003         }
2004         | NOTENAME_PITCH sup_quotes     {
2005                 Pitch p = *unsmob_pitch ($1);
2006                 p = p.transposed (Pitch ($2,0,0));
2007                 $$ = p.smobbed_copy ();
2008         }
2009         | NOTENAME_PITCH sub_quotes      {
2010                 Pitch p =* unsmob_pitch ($1);
2011                 p = p.transposed (Pitch (-$2,0,0));
2012                 $$ = p.smobbed_copy ();
2013         }
2014         ;
2015
2016 /*
2017 ugh. duplication
2018 */
2019
2020 steno_tonic_pitch:
2021         TONICNAME_PITCH {
2022                 $$ = $1;
2023         }
2024         | TONICNAME_PITCH sup_quotes    {
2025                 Pitch p = *unsmob_pitch ($1);
2026                 p = p.transposed (Pitch ($2,0,0));
2027                 $$ = p.smobbed_copy ();
2028         }
2029         | TONICNAME_PITCH sub_quotes     {
2030                 Pitch p =* unsmob_pitch ($1);
2031
2032                 p = p.transposed (Pitch (-$2,0,0));
2033                 $$ = p.smobbed_copy ();
2034         }
2035         ;
2036
2037 pitch:
2038         steno_pitch {
2039                 $$ = $1;
2040         }
2041         ;
2042
2043 pitch_also_in_chords:
2044         pitch
2045         | steno_tonic_pitch
2046         ;
2047
2048 gen_text_def:
2049         full_markup {
2050                 Music *t = MY_MAKE_MUSIC ("TextScriptEvent");
2051                 t->set_property ("text", $1);
2052                 t->set_spot (@$);
2053                 $$ = t;
2054         }
2055         | string {
2056                 Music *t = MY_MAKE_MUSIC ("TextScriptEvent");
2057                 t->set_property ("text",
2058                         make_simple_markup ($1));
2059                 t->set_spot (@$);
2060                 $$ = t;
2061
2062         }
2063         | DIGIT {
2064                 Music *t = MY_MAKE_MUSIC ("FingerEvent");
2065                 t->set_property ("digit", scm_from_int ($1));
2066                 t->set_spot (@$);
2067                 $$ = t;
2068         }
2069         ;
2070
2071 script_abbreviation:
2072         '^'             {
2073                 $$ = scm_makfrom0str ("Hat");
2074         }
2075         | '+'           {
2076                 $$ = scm_makfrom0str ("Plus");
2077         }
2078         | '-'           {
2079                 $$ = scm_makfrom0str ("Dash");
2080         }
2081         | '|'           {
2082                 $$ = scm_makfrom0str ("Bar");
2083         }
2084         | '>'           {
2085                 $$ = scm_makfrom0str ("Larger");
2086         }
2087         | '.'           {
2088                 $$ = scm_makfrom0str ("Dot");
2089         }
2090         | '_' {
2091                 $$ = scm_makfrom0str ("Underscore");
2092         }
2093         ;
2094
2095 script_dir:
2096         '_'     { $$ = DOWN; }
2097         | '^'   { $$ = UP; }
2098         | '-'   { $$ = CENTER; }
2099         ;
2100
2101
2102 absolute_pitch:
2103         steno_pitch     {
2104                 $$ = $1;
2105         }
2106         ;
2107
2108 duration_length:
2109         multiplied_duration {
2110                 $$ = $1;
2111         }
2112         ;
2113
2114 optional_notemode_duration:
2115         {
2116                 Duration dd = THIS->default_duration_;
2117                 $$ = dd.smobbed_copy ();
2118         }
2119         | multiplied_duration   {
2120                 $$ = $1;
2121                 THIS->default_duration_ = *unsmob_duration ($$);
2122         }
2123         ;
2124
2125 steno_duration:
2126         bare_unsigned dots              {
2127                 int len = 0;
2128                 if (!is_duration ($1))
2129                         THIS->parser_error (@1, _f ("not a duration: %d", $1));
2130                 else
2131                         len = intlog2 ($1);
2132
2133                 $$ = Duration (len, $2).smobbed_copy ();
2134         }
2135         | DURATION_IDENTIFIER dots      {
2136                 Duration *d = unsmob_duration ($1);
2137                 Duration k (d->duration_log (), d->dot_count () + $2);
2138                 *d = k;
2139                 $$ = $1;
2140         }
2141         ;
2142
2143 multiplied_duration:
2144         steno_duration {
2145                 $$ = $1;
2146         }
2147         | multiplied_duration '*' bare_unsigned {
2148                 $$ = unsmob_duration ($$)->compressed ( $3) .smobbed_copy ();
2149         }
2150         | multiplied_duration '*' FRACTION {
2151                 Rational  m (scm_to_int (scm_car ($3)), scm_to_int (scm_cdr ($3)));
2152
2153                 $$ = unsmob_duration ($$)->compressed (m).smobbed_copy ();
2154         }
2155         ;
2156
2157 fraction:
2158         FRACTION { $$ = $1; }
2159         | UNSIGNED '/' UNSIGNED {
2160                 $$ = scm_cons (scm_from_int ($1), scm_from_int ($3));
2161         }
2162         ;
2163
2164 dots:
2165         /* empty */     {
2166                 $$ = 0;
2167         }
2168         | dots '.' {
2169                 $$ ++;
2170         }
2171         ;
2172
2173 tremolo_type:
2174         ':'     {
2175                 $$ = 0;
2176         }
2177         | ':' bare_unsigned {
2178                 if (!is_duration ($2))
2179                         THIS->parser_error (@2, _f ("not a duration: %d", $2));
2180                 $$ = $2;
2181         }
2182         ;
2183
2184 bass_number:
2185         DIGIT   {
2186                 $$ = scm_from_int ($1);
2187         }
2188         | UNSIGNED {
2189                 $$ = scm_from_int ($1);
2190         }
2191         | STRING { $$ = $1; }
2192         | full_markup { $$ = $1; }
2193         ;
2194
2195 figured_bass_alteration:
2196         '-'     { $$ = -2; }
2197         | '+'   { $$ = 2; }
2198         | '!'   { $$ = 0; }
2199         ;
2200
2201 bass_figure:
2202         FIGURE_SPACE {
2203                 Music *bfr = MY_MAKE_MUSIC ("BassFigureEvent");
2204                 $$ = bfr->self_scm ();
2205                 bfr->unprotect ();
2206         }
2207         | bass_number  {
2208                 Music *bfr = MY_MAKE_MUSIC ("BassFigureEvent");
2209                 $$ = bfr->self_scm ();
2210
2211                 if (scm_is_number ($1))
2212                         bfr->set_property ("figure", $1);
2213                 else if (Text_interface::is_markup ($1))
2214                         bfr->set_property ("text", $1);
2215
2216                 bfr->unprotect ();
2217         }
2218         | bass_figure ']' {
2219                 $$ = $1;
2220                 unsmob_music ($1)->set_property ("bracket-stop", SCM_BOOL_T);
2221         }
2222         | bass_figure figured_bass_alteration {
2223                 Music *m = unsmob_music ($1);
2224                 if ($2) {
2225                         SCM salter = m->get_property ("alteration");
2226                         int alter = scm_is_number (salter) ? scm_to_int (salter) : 0;
2227                         m->set_property ("alteration",
2228                                 scm_from_int (alter + $2));
2229                 } else {
2230                         m->set_property ("alteration", scm_from_int (0));
2231                 }
2232         }
2233         | bass_figure figured_bass_modification  {
2234                 Music *m = unsmob_music ($1);
2235                 if ($2 == ly_symbol2scm ("plus"))
2236                         {
2237                         m->set_property ("augmented", SCM_BOOL_T);
2238                         }
2239                 else if ($2 == ly_symbol2scm ("slash"))
2240                         {
2241                         m->set_property ("diminished", SCM_BOOL_T);
2242                         }
2243                 else if ($2 == ly_symbol2scm ("exclamation"))
2244                         {
2245                         m->set_property ("no-continuation", SCM_BOOL_T);
2246                         }
2247         }
2248         ;
2249
2250
2251 figured_bass_modification:
2252         E_PLUS          {
2253                 $$ = ly_symbol2scm ("plus");
2254         }
2255         | E_EXCLAMATION {
2256                 $$ = ly_symbol2scm ("exclamation");
2257         }
2258         | '/'           {
2259                 $$ = ly_symbol2scm ("slash");
2260         }
2261         ;
2262
2263 br_bass_figure:
2264         bass_figure {
2265                 $$ = $1;
2266         }
2267         | '[' bass_figure {
2268                 $$ = $2;
2269                 unsmob_music ($$)->set_property ("bracket-start", SCM_BOOL_T);
2270         }
2271         ;
2272
2273 figure_list:
2274         /**/            {
2275                 $$ = SCM_EOL;
2276         }
2277         | figure_list br_bass_figure {
2278                 $$ = scm_cons ($2, $1);
2279         }
2280         ;
2281
2282 figure_spec:
2283         FIGURE_OPEN figure_list FIGURE_CLOSE {
2284                 Music *m = MY_MAKE_MUSIC ("EventChord");
2285                 $2 = scm_reverse_x ($2, SCM_EOL);
2286                 m->set_property ("elements", $2);
2287                 $$ = m->self_scm ();
2288         }
2289         ;
2290
2291
2292 optional_rest:
2293         /**/   { $$ = 0; }
2294         | REST { $$ = 1; }
2295         ;
2296
2297 simple_element:
2298         pitch exclamations questions octave_check optional_notemode_duration optional_rest {
2299                 if (!THIS->lexer_->is_note_state ())
2300                         THIS->parser_error (@1, _ ("have to be in Note mode for notes"));
2301
2302                 Music *n = 0;
2303                 if ($6)
2304                         n = MY_MAKE_MUSIC ("RestEvent");
2305                 else
2306                         n = MY_MAKE_MUSIC ("NoteEvent");
2307
2308                 n->set_property ("pitch", $1);
2309                 n->set_property ("duration", $5);
2310
2311                 if (scm_is_number ($4))
2312                 {
2313                         int q = scm_to_int ($4);
2314                         n->set_property ("absolute-octave", scm_from_int (q-1));
2315                 }
2316
2317                 if ($3 % 2)
2318                         n->set_property ("cautionary", SCM_BOOL_T);
2319                 if ($2 % 2 || $3 % 2)
2320                         n->set_property ("force-accidental", SCM_BOOL_T);
2321
2322                 Music *v = MY_MAKE_MUSIC ("EventChord");
2323                 v->set_property ("elements", scm_list_1 (n->self_scm ()));
2324                 n->unprotect ();
2325
2326                 v->set_spot (@$);
2327                 n->set_spot (@$);
2328                 $$ = v;
2329         }
2330         | DRUM_PITCH optional_notemode_duration {
2331                 Music *n = MY_MAKE_MUSIC ("NoteEvent");
2332                 n->set_property ("duration", $2);
2333                 n->set_property ("drum-type", $1);
2334
2335                 Music *v = MY_MAKE_MUSIC ("EventChord");
2336                 v->set_property ("elements", scm_list_1 (n->self_scm ()));
2337                 n->unprotect ();
2338                 v->set_spot (@$);
2339                 n->set_spot (@$);
2340                 $$ = v;
2341
2342         }
2343         | figure_spec optional_notemode_duration {
2344                 Music *m = unsmob_music ($1);
2345                 m->set_spot (@$);
2346                 for (SCM s = m->get_property ("elements"); scm_is_pair (s); s = scm_cdr (s))
2347                 {
2348                         unsmob_music (scm_car (s))->set_property ("duration", $2);
2349                 }
2350                 $$ = m;
2351         }
2352         | RESTNAME optional_notemode_duration           {
2353                 Music *ev = 0;
2354                 if (ly_scm2string ($1) == "s") {
2355                         /* Space */
2356                         ev = MY_MAKE_MUSIC ("SkipEvent");
2357                   }
2358                 else {
2359                         ev = MY_MAKE_MUSIC ("RestEvent");
2360
2361                     }
2362                 ev->set_property ("duration", $2);
2363                 ev->set_spot (@$);
2364                 Music *velt = MY_MAKE_MUSIC ("EventChord");
2365                 velt->set_property ("elements", scm_list_1 (ev->self_scm ()));
2366                 velt->set_spot (@$);
2367
2368                 ev->unprotect();
2369
2370                 $$ = velt;
2371         }
2372         | MULTI_MEASURE_REST optional_notemode_duration         {
2373                 SCM proc = ly_lily_module_constant ("make-multi-measure-rest");
2374                 SCM mus = scm_call_2 (proc, $2, make_input (@$));
2375                 $$ = unsmob_music (mus);
2376                 $$->protect ();
2377         }
2378
2379         | lyric_element optional_notemode_duration      {
2380                 if (!THIS->lexer_->is_lyric_state ())
2381                         THIS->parser_error (@1, _ ("have to be in Lyric mode for lyrics"));
2382
2383                 Music *levent = MY_MAKE_MUSIC ("LyricEvent");
2384                 levent->set_property ("text", $1);
2385                 levent->set_property ("duration",$2);
2386                 levent->set_spot (@$);
2387                 Music *velt = MY_MAKE_MUSIC ("EventChord");
2388                 velt->set_property ("elements", scm_list_1 (levent->self_scm ()));
2389
2390                 $$= velt;
2391         }
2392         | new_chord {
2393                 if (!THIS->lexer_->is_chord_state ())
2394                         THIS->parser_error (@1, _ ("have to be in Chord mode for chords"));
2395                 $$ = unsmob_music ($1);
2396         }
2397         ;
2398
2399 lyric_element:
2400         lyric_markup {
2401                 $$ = $1;
2402         }
2403         | LYRICS_STRING {
2404                 $$ = $1;
2405         }
2406         ;
2407
2408 new_chord:
2409         steno_tonic_pitch optional_notemode_duration   {
2410                 $$ = make_chord ($1, $2, SCM_EOL);
2411         }
2412         | steno_tonic_pitch optional_notemode_duration chord_separator chord_items {
2413                 SCM its = scm_reverse_x ($4, SCM_EOL);
2414                 $$ = make_chord ($1, $2, scm_cons ($3, its));
2415         }
2416         ;
2417
2418 chord_items:
2419         /**/ {
2420                 $$ = SCM_EOL;
2421         }
2422         | chord_items chord_item {
2423                 $$ = scm_cons ($2, $$);
2424         }
2425         ;
2426
2427 chord_separator:
2428         CHORD_COLON {
2429                 $$ = ly_symbol2scm ("chord-colon");
2430         }
2431         | CHORD_CARET {
2432                 $$ = ly_symbol2scm ("chord-caret");
2433         }
2434         | CHORD_SLASH steno_tonic_pitch {
2435                 $$ = scm_list_2 (ly_symbol2scm ("chord-slash"), $2);
2436         }
2437         | CHORD_BASS steno_tonic_pitch {
2438                 $$ = scm_list_2 (ly_symbol2scm ("chord-bass"), $2);
2439         }
2440         ;
2441
2442 chord_item:
2443         chord_separator {
2444                 $$ = $1;
2445         }
2446         | step_numbers {
2447                 $$ = scm_reverse_x ($1, SCM_EOL);
2448         }
2449         | CHORD_MODIFIER  {
2450                 $$ = $1;
2451         }
2452         ;
2453
2454 step_numbers:
2455         step_number { $$ = scm_cons ($1, SCM_EOL); }
2456         | step_numbers '.' step_number {
2457                 $$ = scm_cons ($3, $$);
2458         }
2459         ;
2460
2461 step_number:
2462         bare_unsigned {
2463                 $$ = make_chord_step ($1, 0);
2464         }
2465         | bare_unsigned '+' {
2466                 $$ = make_chord_step ($1, SHARP);
2467         }
2468         | bare_unsigned CHORD_MINUS {
2469                 $$ = make_chord_step ($1, FLAT);
2470         }
2471         ;
2472
2473 /*
2474         UTILITIES
2475
2476 TODO: should deprecate in favor of Scheme?
2477
2478  */
2479 number_expression:
2480         number_expression '+' number_term {
2481                 $$ = scm_sum ($1, $3);
2482         }
2483         | number_expression '-' number_term {
2484                 $$ = scm_difference ($1, $3);
2485         }
2486         | number_term
2487         ;
2488
2489 number_term:
2490         number_factor {
2491                 $$ = $1;
2492         }
2493         | number_factor '*' number_factor {
2494                 $$ = scm_product ($1, $3);
2495         }
2496         | number_factor '/' number_factor {
2497                 $$ = scm_divide ($1, $3);
2498         }
2499         ;
2500
2501 number_factor:
2502         '-'  number_factor { /* %prec UNARY_MINUS */
2503                 $$ = scm_difference ($2, SCM_UNDEFINED);
2504         }
2505         | bare_number
2506         ;
2507
2508
2509 bare_number:
2510         UNSIGNED        {
2511                 $$ = scm_from_int ($1);
2512         }
2513         | REAL          {
2514                 $$ = $1;
2515         }
2516         | NUMBER_IDENTIFIER             {
2517                 $$ = $1;
2518         }
2519         | REAL NUMBER_IDENTIFIER        {
2520                 $$ = scm_from_double (scm_to_double ($1) *scm_to_double ($2));
2521         }
2522         | UNSIGNED NUMBER_IDENTIFIER    {
2523                 $$ = scm_from_double ($1 *scm_to_double ($2));
2524         }
2525         ;
2526
2527
2528 bare_unsigned:
2529         UNSIGNED {
2530                         $$ = $1;
2531         }
2532         | DIGIT {
2533                 $$ = $1;
2534         }
2535         ;
2536
2537 exclamations:
2538                 { $$ = 0; }
2539         | exclamations '!'      { $$ ++; }
2540         ;
2541
2542 questions:
2543                 { $$ = 0; }
2544         | questions '?' { $$ ++; }
2545         ;
2546
2547 /*
2548 This should be done more dynamically if possible.
2549 */
2550
2551 lyric_markup:
2552         LYRIC_MARKUP_IDENTIFIER {
2553                 $$ = $1;
2554         }
2555         | LYRIC_MARKUP
2556                 { THIS->lexer_->push_markup_state (); }
2557         markup_top {
2558                 $$ = $3;
2559                 THIS->lexer_->pop_state ();
2560         }
2561         ;
2562
2563 full_markup:
2564         MARKUP_IDENTIFIER {
2565                 $$ = $1;
2566         }
2567         | MARKUP
2568                 { THIS->lexer_->push_markup_state (); }
2569         markup_top {
2570                 $$ = $3;
2571                 THIS->lexer_->pop_state ();
2572         }
2573         ;
2574
2575 markup_top:
2576         markup_list {
2577                 $$ = scm_list_2 (ly_lily_module_constant ("line-markup"),  $1);
2578         }
2579         | markup_head_1_list simple_markup      {
2580                 $$ = scm_car (scm_call_2 (ly_lily_module_constant ("map-markup-command-list"), $1, scm_list_1 ($2)));
2581         }
2582         | simple_markup {
2583                 $$ = $1;
2584         }
2585         ;
2586
2587 markup_list:
2588         markup_composed_list {
2589                 $$ = $1;
2590         }
2591         | markup_braced_list {
2592                 $$ = $1;
2593         }
2594         ;
2595
2596 markup_composed_list:
2597         markup_head_1_list markup_braced_list {
2598                 $$ = scm_call_2 (ly_lily_module_constant ("map-markup-command-list"), $1, $2);
2599
2600         }
2601         ;
2602
2603 markup_braced_list:
2604         '{' markup_braced_list_body '}' {
2605                 $$ = scm_reverse_x ($2, SCM_EOL);
2606         }
2607         ;
2608
2609 markup_braced_list_body:
2610         /* empty */     {  $$ = SCM_EOL; }
2611         | markup_braced_list_body markup {
2612                 $$ = scm_cons ($2, $1);
2613         }
2614         | markup_braced_list_body markup_list {
2615                 $$ = scm_append_x (scm_list_2 (scm_reverse_x ($2, SCM_EOL), $1));
2616         }
2617         ;
2618
2619 markup_head_1_item:
2620         MARKUP_HEAD_MARKUP0     {
2621                 $$ = scm_list_1 ($1);
2622         }
2623         | MARKUP_HEAD_SCM0_MARKUP1 embedded_scm {
2624                 $$ = scm_list_2 ($1, $2);
2625         }
2626         | MARKUP_HEAD_SCM0_SCM1_MARKUP2 embedded_scm embedded_scm       {
2627                 $$ = scm_list_3 ($1, $2, $3);
2628         }
2629         ;
2630
2631 markup_head_1_list:
2632         markup_head_1_item      {
2633                 $$ = scm_list_1 ($1);
2634         }
2635         | markup_head_1_list markup_head_1_item {
2636                 $$ = scm_cons ($2, $1);
2637         }
2638         ;
2639
2640 simple_markup:
2641         STRING {
2642                 $$ = make_simple_markup ($1);
2643         }
2644         | MARKUP_IDENTIFIER {
2645                 $$ = $1;
2646         }
2647         | LYRIC_MARKUP_IDENTIFIER {
2648                 $$ = $1;
2649         }
2650         | STRING_IDENTIFIER {
2651                 $$ = $1;
2652         }
2653         | SCORE {
2654                 SCM nn = THIS->lexer_->lookup_identifier ("pitchnames");
2655                 THIS->lexer_->push_note_state (alist_to_hashq (nn));
2656         } '{' score_body '}' {
2657                 Score * sc = $4;
2658                 $$ = scm_list_2 (ly_lily_module_constant ("score-markup"), sc->self_scm ());
2659                 sc->unprotect ();
2660                 THIS->lexer_->pop_state ();
2661         }
2662         | MARKUP_HEAD_SCM0 embedded_scm {
2663                 $$ = scm_list_2 ($1, $2);
2664         }
2665         | MARKUP_HEAD_SCM0_SCM1_SCM2 embedded_scm embedded_scm embedded_scm {
2666                 $$ = scm_list_4 ($1, $2, $3, $4);
2667         }
2668         | MARKUP_HEAD_SCM0_SCM1 embedded_scm embedded_scm {
2669                 $$ = scm_list_3 ($1, $2, $3);
2670         }
2671         | MARKUP_HEAD_EMPTY {
2672                 $$ = scm_list_1 ($1);
2673         }
2674         | MARKUP_HEAD_LIST0 markup_list {
2675                 $$ = scm_list_2 ($1,$2);
2676         }
2677         | MARKUP_HEAD_MARKUP0_MARKUP1 markup markup {
2678                 $$ = scm_list_3 ($1, $2, $3);
2679         }
2680         ;
2681
2682 markup:
2683         markup_head_1_list simple_markup        {
2684                 SCM mapper = ly_lily_module_constant ("map-markup-command-list");
2685                 $$ = scm_car (scm_call_2 (mapper, $1, scm_list_1 ($2)));
2686         }
2687         | simple_markup {
2688                 $$ = $1;
2689         }
2690         ;
2691
2692 %%
2693
2694 void
2695 Lily_parser::set_yydebug (bool )
2696 {
2697 #if 0
2698         yydebug = 1;
2699 #endif
2700 }
2701
2702 void
2703 Lily_parser::do_yyparse ()
2704 {
2705         yyparse ((void*)this);
2706 }
2707
2708
2709
2710
2711
2712 /*
2713
2714 It is a little strange to have this function in this file, but
2715 otherwise, we have to import music classes into the lexer.
2716
2717 */
2718 int
2719 Lily_lexer::try_special_identifiers (SCM *destination, SCM sid)
2720 {
2721         if (scm_is_string (sid)) {
2722                 *destination = sid;
2723                 return STRING_IDENTIFIER;
2724         } else if (unsmob_book (sid)) {
2725                 *destination = unsmob_book (sid)->clone ()->self_scm ();
2726                 return BOOK_IDENTIFIER;
2727         } else if (scm_is_number (sid)) {
2728                 *destination = sid;
2729                 return NUMBER_IDENTIFIER;
2730         } else if (unsmob_context_def (sid)) {
2731                 *destination = unsmob_context_def (sid)->clone_scm ();
2732                 return CONTEXT_DEF_IDENTIFIER;
2733         } else if (unsmob_score (sid)) {
2734                 Score *score = new Score (*unsmob_score (sid));
2735                 *destination = score->self_scm ();
2736                 return SCORE_IDENTIFIER;
2737         } else if (Music *mus = unsmob_music (sid)) {
2738                 mus = mus->clone ();
2739                 *destination = mus->self_scm ();
2740                 unsmob_music (*destination)->
2741                         set_property ("origin", make_input (last_input_));
2742
2743                 bool is_event = scm_memq (ly_symbol2scm ("event"), mus->get_property ("types"))
2744                         != SCM_BOOL_F;
2745
2746                 return is_event ? EVENT_IDENTIFIER : MUSIC_IDENTIFIER;
2747         } else if (unsmob_duration (sid)) {
2748                 *destination = unsmob_duration (sid)->smobbed_copy ();
2749                 return DURATION_IDENTIFIER;
2750         } else if (unsmob_output_def (sid)) {
2751                 Output_def *p = unsmob_output_def (sid);
2752                 p = p->clone ();
2753
2754                 *destination = p->self_scm ();
2755                 return OUTPUT_DEF_IDENTIFIER;
2756         } else if (Text_interface::is_markup (sid)) {
2757                 *destination = sid;
2758                 if (is_lyric_state ())
2759                         return LYRIC_MARKUP_IDENTIFIER;
2760                 return MARKUP_IDENTIFIER;
2761         }
2762
2763         return -1;
2764 }
2765
2766 Music *
2767 property_op_to_music (SCM op)
2768 {
2769         Music *m = 0;
2770         SCM tag = scm_car (op);
2771         SCM symbol = scm_cadr (op);
2772         SCM args = scm_cddr (op);
2773         SCM grob_val = SCM_UNDEFINED;
2774         SCM grob_path = SCM_UNDEFINED;
2775         SCM val = SCM_UNDEFINED;
2776
2777         if (tag == ly_symbol2scm ("assign"))
2778                 {
2779                 m = MY_MAKE_MUSIC ("PropertySet");
2780                 val = scm_car (args);
2781                 }
2782         else if (tag == ly_symbol2scm ("unset"))
2783                 m = MY_MAKE_MUSIC ("PropertyUnset");
2784         else if (tag == ly_symbol2scm ("push"))
2785                 {
2786                 m = MY_MAKE_MUSIC ("OverrideProperty");
2787                 grob_val = scm_car (args);
2788                 grob_path = scm_cdr (args);
2789                 m->set_property ("pop-first", SCM_BOOL_T);
2790                 }
2791         else if (tag == ly_symbol2scm ("pop")) {
2792                 m = MY_MAKE_MUSIC ("RevertProperty");
2793                 grob_path = args;
2794                 }
2795
2796         m->set_property ("symbol", symbol);
2797
2798         if (val != SCM_UNDEFINED)
2799                 m->set_property ("value", val);
2800         if (grob_val != SCM_UNDEFINED)
2801                 m->set_property ("grob-value", grob_val);
2802         if (grob_path != SCM_UNDEFINED)
2803                 m->set_property ("grob-property-path", grob_path);
2804
2805         return m;
2806 }
2807
2808 Music*
2809 context_spec_music (SCM type, SCM id, Music *m, SCM ops)
2810 {
2811         Music *csm = MY_MAKE_MUSIC ("ContextSpeccedMusic");
2812
2813         csm->set_property ("element", m->self_scm ());
2814         m->unprotect ();
2815
2816         csm->set_property ("context-type",
2817                 scm_is_symbol (type) ? type : scm_string_to_symbol (type));
2818         csm->set_property ("property-operations", ops);
2819
2820         if (scm_is_string (id))
2821                 csm->set_property ("context-id", id);
2822         return csm;
2823 }
2824
2825 SCM
2826 get_next_unique_context_id ()
2827 {
2828         return scm_makfrom0str ("$uniqueContextId");
2829 }
2830
2831
2832 SCM
2833 get_next_unique_lyrics_context_id ()
2834 {
2835         static int new_context_count;
2836         char s[128];
2837         snprintf (s, 1024, "uniqueContext%d", new_context_count++);
2838         return scm_makfrom0str (s);
2839 }