]> git.donarmstrong.com Git - lilypond.git/blobdiff - lily/parser.yy
Permit event functions to use a non-closed argument list.
[lilypond.git] / lily / parser.yy
index fec7bd8820b45795a589a3a4a17805b542ebddc7..9e257060ae3451dd02ea78de9c80b396e5f430ab 100644 (file)
@@ -81,7 +81,7 @@ or
 %left ADDLYRICS
 
 %right ':' UNSIGNED REAL E_UNSIGNED EVENT_IDENTIFIER EVENT_FUNCTION '^' '_'
-       HYPHEN EXTENDER DURATION_IDENTIFIER
+       HYPHEN EXTENDER DURATION_IDENTIFIER '!'
 
  /* The above are needed for collecting tremoli and other items (that
     could otherwise be interpreted as belonging to the next function
@@ -146,32 +146,36 @@ Lily_parser::parser_error (Input const *i, Lily_parser *parser, SCM *, const str
        parser->parser_error (*i, s);
 }
 
+// The following are somewhat precarious constructs as they may change
+// the value of the lookahead token.  That implies that the lookahead
+// token must not yet have made an impact on the state stack other
+// than causing the reduction of the current rule, or switching the
+// lookahead token while Bison is mulling it over will cause trouble.
+
 #define MYBACKUP(Token, Value, Location)                               \
-do                                                                     \
-       if (yychar == YYEMPTY)                                          \
-       {                                                               \
+       do {                                                            \
+               if (yychar != YYEMPTY)                                  \
+                       parser->lexer_->push_extra_token                \
+                               (yylloc, yychar, yylval);               \
                if (Token)                                              \
-                       parser->lexer_->push_extra_token (Token, Value); \
-               parser->lexer_->push_extra_token (BACKUP);              \
-       } else {                                                        \
-               parser->parser_error                                    \
-                       (Location, _("Too much lookahead"));            \
-       }                                                               \
-while (0)
+                       parser->lexer_->push_extra_token                \
+                               (Location, Token, Value);               \
+               parser->lexer_->push_extra_token (Location, BACKUP);    \
+               yychar = YYEMPTY;                                       \
+       } while (0)
 
 
 #define MYREPARSE(Location, Pred, Token, Value)                                \
-do                                                                     \
-       if (yychar == YYEMPTY)                                          \
-       {                                                               \
-               parser->lexer_->push_extra_token (Token, Value);        \
-               parser->lexer_->push_extra_token (REPARSE,              \
-                                                 Pred);                \
-       } else {                                                        \
-               parser->parser_error                                    \
-                       (Location, _("Too much lookahead"));            \
-       }                                                               \
-while (0)
+       do {                                                            \
+               if (yychar != YYEMPTY)                                  \
+                       parser->lexer_->push_extra_token                \
+                               (yylloc, yychar, yylval);               \
+               parser->lexer_->push_extra_token                        \
+                       (Location, Token, Value);                       \
+               parser->lexer_->push_extra_token                        \
+                       (Location, REPARSE, Pred);                      \
+               yychar = YYEMPTY;                                       \
+       } while (0)
 
 %}
 
@@ -333,6 +337,7 @@ If we give names, Bison complains.
 %token CONTEXT_MOD_IDENTIFIER
 %token DRUM_PITCH
 %token PITCH_IDENTIFIER
+%token PITCH_ARG
 %token DURATION_IDENTIFIER
 %token EVENT_IDENTIFIER
 %token EVENT_FUNCTION
@@ -406,6 +411,13 @@ toplevel_expression:
                SCM proc = parser->lexer_->lookup_identifier ("toplevel-bookpart-handler");
                scm_call_2 (proc, parser->self_scm (), $1);
        }
+       | BOOK_IDENTIFIER {
+               SCM proc = parser->lexer_->lookup_identifier
+                       (unsmob_book($1)->paper_
+                        ? "toplevel-book-handler"
+                        : "toplevel-bookpart-handler");
+               scm_call_2 (proc, parser->self_scm (), $1);
+       }
        | score_block {
                SCM proc = parser->lexer_->lookup_identifier ("toplevel-score-handler");
                scm_call_2 (proc, parser->self_scm (), $1);
@@ -437,6 +449,10 @@ toplevel_expression:
                {
                        SCM proc = parser->lexer_->lookup_identifier ("toplevel-text-handler");
                        scm_call_2 (proc, parser->self_scm (), out);
+               } else if (unsmob_score ($1))
+               {
+                       SCM proc = parser->lexer_->lookup_identifier ("toplevel-score-handler");
+                       scm_call_2 (proc, parser->self_scm (), $1);
                } else if (!scm_is_eq ($1, SCM_UNSPECIFIED))
                        parser->parser_error (@1, _("bad expression type"));
        }
@@ -788,6 +804,10 @@ book_body:
                {
                        SCM proc = parser->lexer_->lookup_identifier ("book-text-handler");
                        scm_call_2 (proc, $1, out);
+               } else if (unsmob_score ($2))
+               {
+                       SCM proc = parser->lexer_->lookup_identifier ("book-score-handler");
+                       scm_call_2 (proc, $1, $2);
                } else if (!scm_is_eq ($2, SCM_UNSPECIFIED))
                        parser->parser_error (@2, _("bad expression type"));
        }
@@ -854,6 +874,10 @@ bookpart_body:
                {
                        SCM proc = parser->lexer_->lookup_identifier ("bookpart-text-handler");
                        scm_call_2 (proc, $1, out);
+               } else if (unsmob_score ($2))
+               {
+                       SCM proc = parser->lexer_->lookup_identifier ("bookpart-score-handler");
+                       scm_call_2 (proc, $1, $2);
                } else if (!scm_is_eq ($2, SCM_UNSPECIFIED))
                        parser->parser_error (@2, _("bad expression type"));
        }
@@ -873,27 +897,69 @@ bookpart_body:
 
 score_block:
        SCORE '{' score_body '}'        {
+               unsmob_score ($3)->origin ()->set_spot (@$);
                $$ = $3;
        }
        ;
 
+score_headers:
+       /* empty */
+       {
+               $$ = SCM_EOL;
+       }
+       | score_headers
+       {
+               if (!scm_is_pair ($1)
+                   || !ly_is_module (scm_car ($1)))
+                       $1 = scm_cons (ly_make_module (false), $1);
+               parser->lexer_->add_scope (scm_car ($1));
+       } lilypond_header
+       {
+               $$ = $1;
+       }
+       | score_headers output_def
+       {
+                Output_def *od = unsmob_output_def ($2);
+               if (od->lookup_variable (ly_symbol2scm ("is-paper")) == SCM_BOOL_T)
+               {
+                       parser->parser_error (@2, _("\\paper cannot be used in \\score, use \\layout instead"));
+
+               }
+               else
+               {
+                       if (scm_is_pair ($1) && ly_is_module (scm_car ($1)))
+                               scm_set_cdr_x ($1, scm_cons ($2, scm_cdr ($1)));
+                       else
+                               $$ = scm_cons ($2, $1);
+               }
+       }
+       ;
+
+               
+
 score_body:
-       music {
+       score_headers music {
                SCM scorify = ly_lily_module_constant ("scorify-music");
-               $$ = scm_call_2 (scorify, $1, parser->self_scm ());
+               $$ = scm_call_2 (scorify, $2, parser->self_scm ());
 
-               unsmob_score ($$)->origin ()->set_spot (@$);
+               if (scm_is_pair ($1) && ly_is_module (scm_car ($1)))
+               {
+                       unsmob_score ($$)->set_header (scm_car ($1));
+                       $1 = scm_cdr ($1);
+               }
+               for (SCM p = scm_reverse_x ($1, SCM_EOL);
+                    scm_is_pair (p); p = scm_cdr (p))
+               {
+                       unsmob_score ($$)->
+                               add_output_def (unsmob_output_def (scm_car (p)));
+               }
        }
        | embedded_scm_active {
-               Score *score;
-               if (unsmob_score ($1))
-                       score = new Score (*unsmob_score ($1));
-               else {
-                       score = new Score;
+               if (!unsmob_score ($1))
+               {
+                       $$ = (new Score)->unprotect ();
                        parser->parser_error (@1, _("score expected"));
                }
-               unsmob_score ($$)->origin ()->set_spot (@$);
-               $$ = score->unprotect ();
        }
        | score_body
        {
@@ -1540,6 +1606,11 @@ function_arglist_nonbackup_reparse:
        ;
 
 
+// function_arglist_backup can't occur at the end of an argument
+// list.  It needs to be careful about avoiding lookahead only until
+// it has made a decision whether or not to accept the parsed entity.
+// At that point of time, music requiring lookahead to parse becomes
+// fine.
 function_arglist_backup:
        function_arglist_common
        | EXPECT_OPTIONAL EXPECT_SCM function_arglist_backup embedded_scm_arg_closed
@@ -1650,7 +1721,7 @@ function_arglist_backup:
                        else {
                                $$ = scm_cons (loc_on_music (@3, $1), $3);
                                MYBACKUP (UNSIGNED, $5, @5);
-                               parser->lexer_->push_extra_token ('-');
+                               parser->lexer_->push_extra_token (@4, '-');
                        }
                }
                
@@ -1678,10 +1749,15 @@ function_arglist_backup:
        }
        | EXPECT_OPTIONAL EXPECT_SCM function_arglist_backup PITCH_IDENTIFIER
        {
-               if (scm_is_true (scm_call_1 ($2, $4)))
+               SCM m = make_music_from_simple (parser, @4, $4);
+               if (unsmob_music (m) && scm_is_true (scm_call_1 ($2, m)))
                {
                        MYREPARSE (@4, $2, PITCH_IDENTIFIER, $4);
                        $$ = $3;
+               } else if (scm_is_true (scm_call_1 ($2, $4)))
+               {
+                       MYREPARSE (@4, $2, PITCH_ARG, $4);
+                       $$ = $3;
                } else {
                        $$ = scm_cons (loc_on_music (@3, $1), $3);
                        MYBACKUP (PITCH_IDENTIFIER, $4, @4);
@@ -1689,10 +1765,15 @@ function_arglist_backup:
        }
        | EXPECT_OPTIONAL EXPECT_SCM function_arglist_backup NOTENAME_PITCH
        {
-               if (scm_is_true (scm_call_1 ($2, $4)))
+               SCM m = make_music_from_simple (parser, @4, $4);
+               if (unsmob_music (m) && scm_is_true (scm_call_1 ($2, m)))
                {
                        MYREPARSE (@4, $2, NOTENAME_PITCH, $4);
                        $$ = $3;
+               } else if (scm_is_true (scm_call_1 ($2, $4)))
+               {
+                       MYREPARSE (@4, $2, PITCH_ARG, $4);
+                       $$ = $3;
                } else {
                        $$ = scm_cons (loc_on_music (@3, $1), $3);
                        MYBACKUP (NOTENAME_PITCH, $4, @4);
@@ -1700,10 +1781,15 @@ function_arglist_backup:
        }
        | EXPECT_OPTIONAL EXPECT_SCM function_arglist_backup TONICNAME_PITCH
        {
-               if (scm_is_true (scm_call_1 ($2, $4)))
+               SCM m = make_music_from_simple (parser, @4, $4);
+               if (unsmob_music (m) && scm_is_true (scm_call_1 ($2, m)))
                {
                        MYREPARSE (@4, $2, TONICNAME_PITCH, $4);
                        $$ = $3;
+               } else if (scm_is_true (scm_call_1 ($2, $4)))
+               {
+                       MYREPARSE (@4, $2, PITCH_ARG, $4);
+                       $$ = $3;
                } else {
                        $$ = scm_cons (loc_on_music (@3, $1), $3);
                        MYBACKUP (TONICNAME_PITCH, $4, @4);
@@ -1760,6 +1846,11 @@ function_arglist_backup:
                                               (parser, @3, $3),
                                               $1, $2);
        }
+       | function_arglist_backup REPARSE pitch_arg
+       {
+               $$ = check_scheme_arg (parser, @3,
+                                      $3, $1, $2);
+       }               
        | function_arglist_backup REPARSE bare_number_common
        {
                $$ = check_scheme_arg (parser, @3,
@@ -2182,8 +2273,8 @@ re_rhythmed_music:
        ;
 
 context_change:
-       CHANGE STRING '=' STRING  {
-               $$ = MAKE_SYNTAX ("context-change", @$, scm_string_to_symbol ($2), $4);
+       CHANGE symbol '=' simple_string  {
+               $$ = MAKE_SYNTAX ("context-change", @$, $2, $4);
        }
        ;
 
@@ -2429,10 +2520,10 @@ simple_revert_context:
                    (scm_object_property (scm_car ($1),
                                          ly_symbol2scm ("is-grob?")))) {
                        $$ = ly_symbol2scm ("Bottom");
-                       parser->lexer_->push_extra_token (SCM_IDENTIFIER, $1);
+                       parser->lexer_->push_extra_token (@1, SCM_IDENTIFIER, $1);
                } else {
                        $$ = scm_car ($1);
-                       parser->lexer_->push_extra_token (SCM_IDENTIFIER,
+                       parser->lexer_->push_extra_token (@1, SCM_IDENTIFIER,
                                                          scm_cdr ($1));
                }
        }
@@ -2523,13 +2614,19 @@ event_chord:
                }
        } %prec ':'
        | simple_chord_elements post_events     {
-               SCM elts = ly_append2 ($1, scm_reverse_x ($2, SCM_EOL));
-
-               Input i;
-               /* why is this giving wrong start location? -ns
-                * i = @$; */
-               i.set_location (@1, @2);
-               $$ = MAKE_SYNTAX ("event-chord", i, elts);
+               if (scm_is_pair ($2)) {
+                       if (unsmob_pitch ($1))
+                               $1 = make_chord_elements (@1,
+                                                         $1,
+                                                         parser->default_duration_.smobbed_copy (),
+                                                         SCM_EOL);
+
+                       SCM elts = ly_append2 ($1, scm_reverse_x ($2, SCM_EOL));
+
+                       $$ = MAKE_SYNTAX ("event-chord", @1, elts);
+               } else if (!unsmob_pitch ($1))
+                       $$ = MAKE_SYNTAX ("event-chord", @1, $1);
+               // A mere pitch drops through.
        } %prec ':'
        | CHORD_REPETITION optional_notemode_duration post_events {
                Input i;
@@ -2653,7 +2750,7 @@ music_function_call_closed:
        ;
 
 event_function_event:
-       EVENT_FUNCTION function_arglist_closed {
+       EVENT_FUNCTION function_arglist {
                $$ = MAKE_SYNTAX ("music-function", @$,
                                         $1, $2);
        }
@@ -2700,7 +2797,7 @@ post_event_nofinger:
        direction_less_event {
                $$ = $1;
        }
-       | script_dir music_function_call_closed {
+       | script_dir music_function_call {
                $$ = $2;
                if (!unsmob_music ($2)->is_mus_type ("post-event")) {
                        parser->parser_error (@2, _ ("post-event expected"));
@@ -2782,11 +2879,21 @@ direction_reqd_event:
        }
        | script_abbreviation {
                SCM s = parser->lexer_->lookup_identifier ("dash" + ly_scm2string ($1));
-               Music *a = MY_MAKE_MUSIC ("ArticulationEvent", @$);
-               if (scm_is_string (s))
+               if (scm_is_string (s)) {
+                       Music *a = MY_MAKE_MUSIC ("ArticulationEvent", @$);
                        a->set_property ("articulation-type", s);
-               else parser->parser_error (@1, _ ("expecting string as script definition"));
-               $$ = a->unprotect ();
+                       $$ = a->unprotect ();
+               } else {
+                       Music *original = unsmob_music (s);
+                       if (original && original->is_mus_type ("post-event")) {
+                               Music *a = original->clone ();
+                               a->set_spot (parser->lexer_->override_input (@$));
+                               $$ = a->unprotect ();
+                       } else {
+                               parser->parser_error (@1, _ ("expecting string or post-event as script definition"));
+                               $$ = MY_MAKE_MUSIC ("PostEvents", @$)->unprotect ();
+                       }
+               }
        }
        ;
 
@@ -2860,6 +2967,17 @@ pitch:
        }
        ;
 
+pitch_arg:
+       PITCH_ARG quotes {
+                if (!scm_is_eq (SCM_INUM0, $2))
+                {
+                        Pitch p = *unsmob_pitch ($1);
+                        p = p.transposed (Pitch (scm_to_int ($2),0,0));
+                        $$ = p.smobbed_copy ();
+                }
+       }
+       ;
+
 gen_text_def:
        full_markup {
                Music *t = MY_MAKE_MUSIC ("TextScriptEvent", @$);
@@ -3169,6 +3287,7 @@ simple_element:
        }
        ;
 
+// Can return a single pitch rather than a list.
 simple_chord_elements:
        new_chord {
                 if (!parser->lexer_->is_chord_state ())
@@ -3207,9 +3326,13 @@ lyric_element_music:
        } %prec ':'
        ;
 
+// Can return a single pitch rather than a list.
 new_chord:
-       steno_tonic_pitch optional_notemode_duration   {
-               $$ = make_chord_elements (@$, $1, $2, SCM_EOL);
+       steno_tonic_pitch maybe_notemode_duration   {
+               if (SCM_UNBNDP ($2))
+                       $$ = $1;
+               else
+                       $$ = make_chord_elements (@$, $1, $2, SCM_EOL);
        }
        | steno_tonic_pitch optional_notemode_duration chord_separator chord_items {
                SCM its = scm_reverse_x ($4, SCM_EOL);
@@ -3273,10 +3396,10 @@ step_number:
        ;
 
 tempo_range:
-       UNSIGNED {
+       unsigned_number {
                $$ = $1;
-       }
-       | UNSIGNED '-' UNSIGNED {
+       } %prec ':'
+       | unsigned_number '-' unsigned_number {
                $$ = scm_cons ($1, $3);
        }
        ;
@@ -3345,6 +3468,23 @@ bare_number_closed:
 unsigned_number:
        UNSIGNED
        | NUMBER_IDENTIFIER
+       {
+               if (!scm_is_integer ($1)
+                   || scm_is_true (scm_negative_p ($1)))
+               {
+                       parser->parser_error (@1, _("not an unsigned integer"));
+                       $$ = SCM_INUM0;
+               }
+       }
+       | embedded_scm
+       {
+               if (!scm_is_integer ($1)
+                   || scm_is_true (scm_negative_p ($1)))
+               {
+                       parser->parser_error (@1, _("not an unsigned integer"));
+                       $$ = SCM_INUM0;
+               }
+       }
        ;
 
 exclamations:
@@ -3359,7 +3499,13 @@ exclamations:
        ;
 
 questions:
-       { $$ = SCM_UNDEFINED; }
+// This precedence rule is rather weird.  It triggers when '!' is
+// encountered after a pitch, and is used for deciding whether to save
+// this instead for a figure modification.  This should not actually
+// occur in practice as pitches and figures are generated in different
+// modes.  Using a greedy (%right) precedence makes sure that we don't
+// get stuck in a wrong interpretation.
+       { $$ = SCM_UNDEFINED; } %prec ':'
        | questions '?'
         {
                 if (SCM_UNBNDP ($1))
@@ -3438,6 +3584,7 @@ markup_uncomposed_list:
                SCM nn = parser->lexer_->lookup_identifier ("pitchnames");
                parser->lexer_->push_note_state (nn);
        } '{' score_body '}' {
+               unsmob_score ($4)->origin ()->set_spot (@$);
                $$ = scm_list_1 (scm_list_2 (ly_lily_module_constant ("score-lines-markup-list"), $4));
                parser->lexer_->pop_state ();
        }
@@ -3514,6 +3661,7 @@ simple_markup:
                SCM nn = parser->lexer_->lookup_identifier ("pitchnames");
                parser->lexer_->push_note_state (nn);
        } '{' score_body '}' {
+               unsmob_score ($4)->origin ()->set_spot (@$);
                $$ = scm_list_2 (ly_lily_module_constant ("score-markup"), $4);
                parser->lexer_->pop_state ();
        }
@@ -3605,6 +3753,9 @@ Lily_lexer::try_special_identifiers (SCM *destination, SCM sid)
                *destination = p->self_scm ();
                p->unprotect ();
                return OUTPUT_DEF_IDENTIFIER;
+       } else if (unsmob_score (sid)) {
+               *destination = unsmob_score (sid)->clone ()->unprotect ();
+               return SCM_IDENTIFIER;
        }
 
        return -1;
@@ -3829,6 +3980,9 @@ yylex (YYSTYPE *s, YYLTYPE *loc, Lily_parser *parser)
 
        lex->lexval_ = s;
        lex->lexloc_ = loc;
+       int tok = lex->pop_extra_token ();
+       if (tok >= 0)
+               return tok;
        lex->prepare_for_next_token ();
        return lex->yylex ();
 }