]> git.donarmstrong.com Git - lilypond.git/blobdiff - lily/parser.yy
* flower/include/offset.hh (class Offset): new operator /=
[lilypond.git] / lily / parser.yy
index 1f2c0d863a1a0609041f280cf555eb209679e2d2..a34c8a07784908ae3b6466a0057ad834d7d89c60 100644 (file)
@@ -1,14 +1,60 @@
-%{ // -*-Fundamental-*-
-
 /*
   parser.yy -- Bison/C++ parser for LilyPond
 
   source file of the GNU LilyPond music typesetter
 
-  (c) 1997--2005 Han-Wen Nienhuys <hanwen@cs.uu.nl>
+  (c) 1997--2005 Han-Wen Nienhuys <hanwen@xs4all.nl>
                  Jan Nieuwenhuizen <janneke@gnu.org>
 */
 
+%{
+
+#define YYERROR_VERBOSE 1
+#define YYPARSE_PARAM my_lily_parser
+#define YYLEX_PARAM my_lily_parser
+#define THIS\
+       ((Lily_parser *) my_lily_parser)
+
+#define yyerror THIS->parser_error
+
+/* We use custom location type: Input objects */
+#define YYLTYPE Input
+#define YYLLOC_DEFAULT(Current,Rhs,N) \
+       ((Current).set_location ((Rhs)[1], (Rhs)[N]))
+
+
+%}
+
+/* We use SCMs to do strings, because it saves us the trouble of
+deleting them.  Let's hope that a stack overflow doesnt trigger a move
+of the parse stack onto the heap. */
+
+%left PREC_TOP
+%left ADDLYRICS
+%left PREC_BOT
+
+%expect 1
+
+/* One shift/reduce problem
+
+1.  \repeat
+       \repeat .. \alternative
+
+    \repeat { \repeat .. \alternative }
+
+or
+
+    \repeat { \repeat } \alternative 
+*/
+
+
+%pure_parser
+%locations
+
+
+
+%{ // -*-Fundamental-*-
+
 /*
 FIXME:
 
@@ -20,10 +66,10 @@ FIXME:
 
 #include "config.hh"
 
-#include <ctype.h>
-#include <stdlib.h>
-#include <stdio.h>
-
+#include <cctype>
+#include <cstdlib>
+#include <cstdio>
+using namespace std;
 
 #include "book.hh"
 #include "context-def.hh"
@@ -47,172 +93,8 @@ FIXME:
 #include "warn.hh"
 #include "music.hh"
 
-#define MY_MAKE_MUSIC(x)  make_music_by_name (ly_symbol2scm (x))
-
-Music *property_op_to_music (SCM op);
-Music *context_spec_music (SCM type, SCM id, Music *m, SCM ops);
-SCM get_next_unique_context_id ();
-SCM get_next_unique_lyrics_context_id ();
-
-#undef _
-#if !HAVE_GETTEXT
-#define _(x) x
-#else
-#include <libintl.h>
-#define _(x) gettext (x)
-#endif
-
-#define YYERROR_VERBOSE 1
-
-#define YYPARSE_PARAM my_lily_parser
-#define YYLEX_PARAM my_lily_parser
-#define THIS\
-       ((Lily_parser *) my_lily_parser)
-
-#define yyerror THIS->parser_error
-
-/* We use custom location type: Input objects */
-#define YYLTYPE Input
-#define YYLLOC_DEFAULT(Current,Rhs,N) \
-       ((Current).set_location ((Rhs)[1], (Rhs)[N]))
-
-
-/* Add symbols to the TAGS field of a music object.  */
-
-void
-tag_music (Music *m, SCM tag, Input ip)
-{
-       SCM tags = m->get_property ("tags");
-       if (scm_is_symbol (tag))
-               tags = scm_cons (tag, tags);
-       else if (ly_is_list (tag))
-               tags = ly_append2 (tag, tags);
-       else
-               ip.warning (_ ("tag must be symbol or list of symbols"));
-
-       m->set_property ("tags", tags);
-}
-
-bool
-is_regular_identifier (SCM id)
-{
-  String str = ly_scm2string (id);
-  char const *s = str.to_str0 ();
-
-  bool v = true;
-#if 0
-  isalpha (*s);
-  s++;
-#endif
-  while (*s && v)
-   {
-        v = v && isalnum (*s);
-        s++;
-   }
-  return v;
-}
-
-
-SCM
-get_first_context_id (SCM type, Music *m)
-{
-       SCM id = m->get_property ("context-id");
-       if (SCM_BOOL_T == scm_equal_p (m->get_property ("context-type"), type)
-           && scm_is_string (m->get_property ("context-id"))
-           && scm_c_string_length (id) > 0)
-       {
-               return id;
-       }
-       return SCM_EOL;
-}
-
-SCM
-make_simple_markup (SCM a)
-{
-       SCM simple = ly_lily_module_constant ("simple-markup");
-       return scm_list_2 (simple, a);
-}
-
-bool
-is_duration (int t)
-{
-  return t && t == 1 << intlog2 (t);
-}
-
-void
-set_music_properties (Music *p, SCM a)
-{
-  for (SCM k = a; scm_is_pair (k); k = scm_cdr (k))
-       p->internal_set_property (scm_caar (k), scm_cdar (k));
-}
-
-SCM
-make_chord_step (int step, int alter)
-{
-       if (step == 7)
-               alter += FLAT;
-
-       while (step < 0)
-               step += 7;
-       Pitch m ((step -1) / 7, (step - 1) % 7, alter);
-       return m.smobbed_copy ();
-}
-
-
-SCM
-make_chord (SCM pitch, SCM dur, SCM modification_list)
-{
-       SCM chord_ctor = ly_lily_module_constant ("construct-chord");
-       SCM ch = scm_call_3 (chord_ctor, pitch, dur, modification_list);
-       scm_gc_protect_object (ch);
-       return ch;
-}
-
-/* Todo: actually also use apply iso. call too ...  */
-bool
-ly_input_procedure_p (SCM x)
-{
-       return ly_is_procedure (x)
-               || (scm_is_pair (x) && ly_is_procedure (scm_car (x)));
-}
-
-Music*
-set_property_music (SCM sym, SCM value)
-{
-       Music *p = MY_MAKE_MUSIC ("PropertySet");
-       p->set_property ("symbol", sym);
-       p->set_property ("value", value);
-       return p;
-}
-
-Music*
-make_music_relative (Pitch start, Music *music)
-{
-       Music *relative = MY_MAKE_MUSIC ("RelativeOctaveMusic");
-       relative->set_property ("element", music->self_scm ());
-       
-       Pitch last = music->to_relative_octave (start);
-       if (lily_1_8_relative)
-               music->set_property ("last-pitch", last.smobbed_copy ());
-       return relative;
-}
-
-Music*
-make_lyric_combine_music (SCM name, Music *music)
-{
-       Music *combine = MY_MAKE_MUSIC ("LyricCombineMusic");
-       combine->set_property ("element", music->self_scm ());
-       combine->set_property ("associated-context", name);
-       return combine;
-}
-
 %}
 
-/* We use SCMs to do strings, because it saves us the trouble of
-deleting them.  Let's hope that a stack overflow doesnt trigger a move
-of the parse stack onto the heap. */
-
-%left ADDLYRICS
 
 %union {
        Book *book;
@@ -223,40 +105,41 @@ of the parse stack onto the heap. */
        Score *score;
        int i;
 }
-%{
 
-int
-yylex (YYSTYPE *s, YYLTYPE *loc, void *v)
-{
-       Lily_parser *pars = (Lily_parser*) v;
-       Lily_lexer *lex = pars->lexer_;
-
-       lex->lexval = (void*) s;
-       lex->lexloc = loc;
-       lex->prepare_for_next_token ();
-       return lex->yylex ();
-}
-
-
-%}
-
-%expect 1
+%{
 
-/* One shift/reduce problem
+#define MY_MAKE_MUSIC(x)  make_music_by_name (ly_symbol2scm (x))
 
-1.  \repeat
-       \repeat .. \alternative
+Music *property_op_to_music (SCM op);
+Music *context_spec_music (SCM type, SCM id, Music *m, SCM ops);
+SCM get_next_unique_context_id ();
+SCM get_next_unique_lyrics_context_id ();
 
-    \repeat { \repeat .. \alternative }
+#undef _
+#if !HAVE_GETTEXT
+#define _(x) x
+#else
+#include <libintl.h>
+#define _(x) gettext (x)
+#endif
 
-or
 
-    \repeat { \repeat } \alternative 
-*/
 
+Music *make_lyric_combine_music (SCM name, Music *music);
+Music *make_music_relative (Pitch start, Music *music);
+Music *run_music_function (Lily_parser *, SCM expr);
+Music *set_property_music (SCM sym, SCM value);
+SCM get_first_context_id (SCM type, Music *m);
+SCM make_chord (SCM pitch, SCM dur, SCM modification_list);
+SCM make_chord_step (int step, int alter);
+SCM make_simple_markup (SCM a);
+bool is_duration (int t);
+bool is_regular_identifier (SCM id);
+bool ly_input_procedure_p (SCM x);
+int yylex (YYSTYPE *s, YYLTYPE *loc, void *v);
+void set_music_properties (Music *p, SCM a);
 
-%pure_parser
-%locations
+%}
 
 /* The third option is an alias that will be used to display the
    syntax error.  Bison CVS now correctly handles backslash escapes.
@@ -271,12 +154,10 @@ or
 %token ADDQUOTE "\\addquote"
 %token ALIAS "\\alias"
 %token ALTERNATIVE "\\alternative"
-%token BAR "\\bar"
 %token BOOK "\book"
 %token CHANGE "\\change"
 %token CHORDMODE "\\chordmode"
 %token CHORDS "\\chords"
-%token CLEF "\\clef"
 %token CONSISTS "\\consists"
 %token CONTEXT "\\context"
 %token DEFAULT "\\default"
@@ -316,7 +197,6 @@ or
 %token SET "\\set"
 %token SIMULTANEOUS "\\simultaneous"
 %token SKIP "\\skip"
-%token TAG "\\tag"
 %token TEMPO "\\tempo"
 %token TIMES "\\times"
 %token TRANSPOSE "\\transpose"
@@ -348,15 +228,12 @@ or
 %token E_OPEN "\\("
 %token E_BRACKET_CLOSE "\\]"
 %token E_ANGLE_OPEN "\\<"
+%token E_PLUS "\\+"
 %token E_TILDE "\\~"
 %token EXTENDER "__"
-/*  These used at all?
-  %token FIGURE_BRACKET_CLOSE 
-  %token FIGURE_BRACKET_OPEN
-
-parser.yy:348.8-25: warning: symbol `"\\>"' used more than once as a literal string
-parser.yy:352.8-24: warning: symbol `"\\<"' used more than once as a literal string
 
+/*
+If we give names, Bison complains.
 */
 %token FIGURE_CLOSE /* "\\>" */
 %token FIGURE_OPEN /* "\\<" */
@@ -364,7 +241,6 @@ parser.yy:352.8-24: warning: symbol `"\\<"' used more than once as a literal str
 %token HYPHEN "--"
 
 %token CHORDMODIFIERS
-%token COMMANDSPANREQUEST
 %token LYRIC_MARKUP
 %token MULTI_MEASURE_REST
 %token SCM_T
@@ -374,8 +250,7 @@ parser.yy:352.8-24: warning: symbol `"\\<"' used more than once as a literal str
 %token <i> E_UNSIGNED
 %token <i> UNSIGNED
 
-%token <id> IDENTIFIER
-
+%token <scm> BOOK_IDENTIFIER
 %token <scm> CHORDMODIFIER_PITCH
 %token <scm> CHORD_MODIFIER
 %token <scm> CONTEXT_DEF_IDENTIFIER
@@ -408,6 +283,7 @@ parser.yy:352.8-24: warning: symbol `"\\<"' used more than once as a literal str
 %token <scm> MUSIC_FUNCTION_SCM_MUSIC_MUSIC 
 %token <scm> MUSIC_FUNCTION_SCM_SCM 
 %token <scm> MUSIC_FUNCTION_SCM_SCM_MUSIC 
+%token <scm> MUSIC_FUNCTION_SCM_SCM_SCM 
 %token <scm> MUSIC_IDENTIFIER
 %token <scm> NOTENAME_PITCH
 %token <scm> NUMBER_IDENTIFIER
@@ -426,7 +302,7 @@ parser.yy:352.8-24: warning: symbol `"\\<"' used more than once as a literal str
 %type <book> book_body
 
 %type <i> bare_unsigned
-%type <i> bass_mod
+%type <i> figured_bass_alteration
 %type <i> dots
 %type <i> exclamations
 %type <i> optional_rest
@@ -437,7 +313,6 @@ parser.yy:352.8-24: warning: symbol `"\\<"' used more than once as a literal str
 %type <i> tremolo_type
 
 %type <music> Composite_music
-%type <music> Generic_prefix_music
 %type <music> Grouped_music_list
 %type <music> Music
 %type <music> Prefix_composite_music
@@ -448,7 +323,7 @@ parser.yy:352.8-24: warning: symbol `"\\<"' used more than once as a literal str
 %type <music> chord_body
 %type <music> chord_body_element
 %type <music> command_element
-%type <music> command_req
+%type <music> command_event
 %type <music> context_change
 %type <music> direction_less_event
 %type <music> direction_reqd_event
@@ -461,7 +336,6 @@ parser.yy:352.8-24: warning: symbol `"\\<"' used more than once as a literal str
 %type <music> relative_music
 %type <music> simple_element
 %type <music> string_number_event
-%type <music> tagged_post_event
 %type <music> tempo_event
 %type <music> toplevel_music
 
@@ -476,9 +350,12 @@ parser.yy:352.8-24: warning: symbol `"\\<"' used more than once as a literal str
 %type <scm> absolute_pitch
 %type <scm> assignment_id
 %type <scm> bare_number
+%type <scm> music_function_event
+%type <scm> music_function_chord_body
 %type <scm> bass_figure
-%type <scm> bass_number
+%type <scm> figured_bass_modification
 %type <scm> br_bass_figure
+%type <scm> bass_number
 %type <scm> chord_body_elements
 %type <scm> chord_item
 %type <scm> chord_items
@@ -535,6 +412,7 @@ parser.yy:352.8-24: warning: symbol `"\\<"' used more than once as a literal str
 %type <scm> step_number
 %type <scm> step_numbers 
 %type <scm> string
+%type <scm> function_scm_argument
 
 %type <score> score_block
 %type <score> score_body
@@ -569,7 +447,7 @@ object_id_setting:
 
 toplevel_expression:
        lilypond_header {
-               THIS->lexer_->set_identifier (ly_symbol2scm ("$globalheader"), $1);
+               THIS->lexer_->set_identifier (ly_symbol2scm ("$defaultheader"), $1);
        }
        | add_quote {
        
@@ -578,20 +456,20 @@ toplevel_expression:
                Book *book = $1;
                SCM proc = THIS->lexer_->lookup_identifier ("toplevel-book-handler");
                scm_call_2 (proc, THIS->self_scm (), book->self_scm ());
-               scm_gc_unprotect_object (book->self_scm ());
+               book->unprotect ();
        }
        | score_block {
                Score *score = $1;
                
                SCM proc = THIS->lexer_->lookup_identifier ("toplevel-score-handler");
                scm_call_2 (proc, THIS->self_scm (), score->self_scm ());
-               scm_gc_unprotect_object (score->self_scm ());
+               score->unprotect ();
        }
        | toplevel_music {
                Music *music = $1;
                SCM proc = THIS->lexer_->lookup_identifier ("toplevel-music-handler");
                scm_call_2 (proc, THIS->self_scm (), music->self_scm ());
-               scm_gc_unprotect_object (music->self_scm ());
+               music->unprotect (); 
        }
        | full_markup {
                SCM proc = THIS->lexer_->lookup_identifier ("toplevel-text-handler");
@@ -609,7 +487,7 @@ toplevel_expression:
                        id = ly_symbol2scm ("$defaultlayout");
 
                THIS->lexer_->set_identifier (id, od->self_scm ());
-               scm_gc_unprotect_object (od->self_scm ());
+               od->unprotect();
        }
        ;
 
@@ -626,7 +504,7 @@ embedded_scm:
 
 lilypond_header_body:
        {
-               $$ = ly_make_anonymous_module (be_safe_global);
+               $$ = get_header(THIS);
                THIS->lexer_->add_scope ($$);
        }
        | lilypond_header_body assignment  {
@@ -672,22 +550,26 @@ all objects can be unprotected as soon as they're here.
 identifier_init:
        score_block {
                $$ = $1->self_scm ();
-               scm_gc_unprotect_object ($$);
+               $1->unprotect ();
+       }
+       | book_block {
+               $$ = $1->self_scm ();
+               $1->unprotect ();
        }
        | output_def {
                $$ = $1->self_scm ();
-               scm_gc_unprotect_object ($$);
+               $1->unprotect ();
        }
        | context_def_spec_block {
                $$ = $1;
        }
        | Music  {
                $$ = $1->self_scm ();
-               scm_gc_unprotect_object ($$);
+               $1->unprotect();
        }
        | post_event {
                $$ = $1->self_scm ();
-               scm_gc_unprotect_object ($$);
+               $1->unprotect();
        }
        | number_expression {
                $$ = $1;
@@ -702,7 +584,7 @@ identifier_init:
                $$ = $1;
        }
        | DIGIT {
-               $$ = scm_int2num ($1);
+               $$ = scm_from_int ($1);
        }
        ;
 
@@ -754,17 +636,21 @@ book_body:
                $$ = new Book;
                $$->set_spot (@$);
                $$->paper_ = dynamic_cast<Output_def*> (unsmob_output_def (THIS->lexer_->lookup_identifier ("$defaultpaper"))->clone ());
-               scm_gc_unprotect_object ($$->paper_->self_scm ());
-               $$->header_ = THIS->lexer_->lookup_identifier ("$globalheader"); 
+               $$->paper_->unprotect ();
+               $$->header_ = THIS->lexer_->lookup_identifier ("$defaultheader"); 
+       }
+       | BOOK_IDENTIFIER {
+               $$ = unsmob_book ($1);
+               $$->set_spot (@$);
        }
        | book_body paper_block {
                $$->paper_ = $2;
-               scm_gc_unprotect_object ($2->self_scm ());
+               $2->unprotect ();
        }
        | book_body score_block {
                SCM s = $2->self_scm ();
                $$->add_score (s);
-               scm_gc_unprotect_object (s);
+               $2->unprotect();
        }
        | book_body full_markup {
                $$->add_score ($2);
@@ -790,13 +676,13 @@ score_block:
 score_body:
        Music {
                SCM m = $1->self_scm ();
-               scm_gc_unprotect_object (m);
+               $1->unprotect();
                SCM scorify = ly_lily_module_constant ("scorify-music");
                SCM score = scm_call_2 (scorify, m, THIS->self_scm ());
 
-               // pass ownernship to C++ again. 
-               scm_gc_protect_object (score);
+               // pass ownernship to C++ again.
                $$ = unsmob_score (score);
+               $$->protect ();
                $$->set_spot (@$);
        }
        | SCORE_IDENTIFIER {
@@ -819,7 +705,7 @@ score_body:
                {
                        $$->defs_.push ($2);
                }
-               scm_gc_unprotect_object ($2->self_scm ());
+               $2->unprotect ();
        }
        | score_body error {
                $$->error_found_ = true;
@@ -879,7 +765,7 @@ output_def_body:
                THIS->lexer_->push_initial_state ();
        }
        | output_def_head '{' OUTPUT_DEF_IDENTIFIER     {
-               scm_gc_unprotect_object ($1->self_scm ());
+               $1->unprotect ();
                Output_def *o = unsmob_output_def ($3);
                o->input_origin_.set_spot (@$);
                $$ = o;
@@ -901,7 +787,7 @@ output_def_body:
                int m = scm_to_int ($2->get_property ("metronome-count"));
                Duration *d = unsmob_duration ($2->get_property ("tempo-unit"));
                set_tempo ($$, d->get_length (), m);
-               scm_gc_unprotect_object ($2->self_scm ());
+               $2->unprotect ();
        }
        | output_def_body error {
 
@@ -912,7 +798,7 @@ tempo_event:
        TEMPO steno_duration '=' bare_unsigned  {
                $$ = MY_MAKE_MUSIC ("MetronomeChangeEvent");
                $$->set_property ("tempo-unit", $2);
-               $$->set_property ("metronome-count", scm_int2num ( $4));
+               $$->set_property ("metronome-count", scm_from_int ( $4));
        }
        ;
 
@@ -930,7 +816,7 @@ Music_list:
        | Music_list Music {
                SCM s = $$;
                SCM c = scm_cons ($2->self_scm (), SCM_EOL);
-               scm_gc_unprotect_object ($2->self_scm ()); /* UGH */
+               $2->unprotect (); /* UGH */
 
                if (scm_is_pair (scm_cdr (s)))
                        scm_set_cdr_x (scm_cdr (s), c); /* append */
@@ -947,7 +833,7 @@ Music_list:
                m->set_property ("error-found", SCM_BOOL_T);
                SCM s = $$;
                SCM c = scm_cons (m->self_scm (), SCM_EOL);
-               scm_gc_unprotect_object (m->self_scm ()); /* UGH */
+               m->unprotect (); /* UGH */
 
                if (scm_is_pair (scm_cdr (s)))
                        scm_set_cdr_x (scm_cdr (s), c); /* append */
@@ -990,14 +876,14 @@ Repeated_music:
                SCM proc = ly_lily_module_constant ("make-repeated-music");
 
                SCM mus = scm_call_1 (proc, $2);
-               scm_gc_protect_object (mus); // UGH.
                Music *r = unsmob_music (mus);
+               r->protect ();
                if (beg)
                        {
                        r-> set_property ("element", beg->self_scm ());
-                       scm_gc_unprotect_object (beg->self_scm ());
+                       beg->unprotect ();
                        }
-               r->set_property ("repeat-count", scm_int2num (max (times, 1)));
+               r->set_property ("repeat-count", scm_from_int (max (times, 1)));
 
                r-> set_property ("elements",alts);
                if (ly_is_equal ($2, scm_makfrom0str ("tremolo"))) {
@@ -1022,7 +908,7 @@ Repeated_music:
                                shift -= 1;
                                r->compress (Moment (Rational (1, list_len)));
                        }
-                       scm_call_3 (func, r->self_scm (), scm_int2num (shift), scm_int2num (dots));
+                       scm_call_3 (func, r->self_scm (), scm_from_int (shift), scm_from_int (dots));
 
                }
                r->set_spot (*$4->origin ());
@@ -1096,94 +982,67 @@ Grouped_music_list:
        | Sequential_music              { $$ = $1; }
        ;
 
+
+function_scm_argument:
+       embedded_scm  
+       | simple_string
+       ;
+
 Generic_prefix_music_scm:
        MUSIC_FUNCTION {
                $$ = scm_list_2 ($1, make_input (@$));
        }
-       | MUSIC_FUNCTION_SCM embedded_scm {
+       | MUSIC_FUNCTION_SCM function_scm_argument {
                $$ = scm_list_3 ($1, make_input (@$), $2);
        }
        | MUSIC_FUNCTION_MARKUP full_markup {
                $$ = scm_list_3 ($1, make_input (@$), $2);
        }
-       | MUSIC_FUNCTION_MUSIC Music {
-               $$ = scm_list_3 ($1, make_input (@$), $2->self_scm ());
-               scm_gc_unprotect_object ($2->self_scm ());
-       }
-       | MUSIC_FUNCTION_SCM_MUSIC embedded_scm Music {
+
+       | MUSIC_FUNCTION_SCM_MUSIC function_scm_argument Music {
                $$ = scm_list_4 ($1, make_input (@$), $2, $3->self_scm ());
-               scm_gc_unprotect_object ($3->self_scm ());
+               $3->unprotect ();
        }
-       | MUSIC_FUNCTION_SCM_SCM embedded_scm embedded_scm {
+       | MUSIC_FUNCTION_SCM_SCM function_scm_argument function_scm_argument {
                $$ = scm_list_4 ($1, make_input (@$), $2, $3);
        }
-       | MUSIC_FUNCTION_SCM_SCM_MUSIC embedded_scm embedded_scm Music {
+       | MUSIC_FUNCTION_SCM_SCM_SCM function_scm_argument function_scm_argument function_scm_argument {
+               $$ = scm_list_5 ($1, make_input (@$), $2, $3, $4);
+       }
+       | MUSIC_FUNCTION_MUSIC Music {
+               $$ = scm_list_3 ($1, make_input (@$), $2->self_scm ());
+               $2->unprotect ();
+       }
+       | MUSIC_FUNCTION_SCM_SCM_MUSIC function_scm_argument function_scm_argument Music {
                $$ = scm_list_5 ($1, make_input (@$), $2, $3, $4->self_scm ());
        }
        | MUSIC_FUNCTION_MARKUP_MUSIC full_markup Music {
                $$ = scm_list_4 ($1, make_input (@$), $2, $3->self_scm ());
-               scm_gc_unprotect_object ($3->self_scm ());
+               $3->unprotect ();
        }
        | MUSIC_FUNCTION_MARKUP_MARKUP full_markup full_markup {
                $$ = scm_list_4 ($1, make_input (@$), $2, $3);
        }
        | MUSIC_FUNCTION_MUSIC_MUSIC Music Music {
                $$ = scm_list_4 ($1, make_input (@$), $2->self_scm (), $3->self_scm ());
-               scm_gc_unprotect_object ($2->self_scm ());
-               scm_gc_unprotect_object ($3->self_scm ());
+               $2->unprotect ();
+               $3->unprotect ();
        }
-       | MUSIC_FUNCTION_SCM_MUSIC_MUSIC embedded_scm Music Music {
+       | MUSIC_FUNCTION_SCM_MUSIC_MUSIC function_scm_argument Music Music {
                $$ = scm_list_5 ($1, make_input (@$), $2, $3->self_scm (), $4->self_scm ());
-               scm_gc_unprotect_object ($4->self_scm ());
-               scm_gc_unprotect_object ($3->self_scm ());
+               $4->unprotect ();
+               $3->unprotect ();
        }
        | MUSIC_FUNCTION_MARKUP_MUSIC_MUSIC full_markup Music Music {
                $$ = scm_list_5 ($1, make_input (@$), $2, $3->self_scm (), $4->self_scm ());
-               scm_gc_unprotect_object ($3->self_scm ());
-               scm_gc_unprotect_object ($4->self_scm ());
+               $3->unprotect ();
+               $4->unprotect ();
        }
        ;
 
-Generic_prefix_music:
-       Generic_prefix_music_scm {
-               SCM func = scm_car ($1);
-               Input *loc = unsmob_input (scm_cadr ($1));
-               SCM args = scm_cddr ($1);
-               SCM sig = scm_object_property (func, ly_symbol2scm ("music-function-signature"));
-
-               SCM type_check_proc = ly_lily_module_constant ("type-check-list");
-               bool ok  = true;
-
-               if (!to_boolean (scm_call_3  (type_check_proc, scm_cadr ($1), sig, args)))
-               {
-                       THIS->error_level_ = 1;
-                       ok = false;
-               }
-
-               SCM m = SCM_EOL;
-               if (ok)
-                       m = scm_apply_0 (func, scm_cons (THIS->self_scm(),
-                                                        scm_cdr ($1)));
-
-               if (unsmob_music (m))
-                       {
-                       $$ = unsmob_music (m);
-                       scm_gc_protect_object (m);
-                       }
-               else
-                       {
-                       if (ok)
-                               loc->error (_ ("music head function must return Music object")); 
-                       $$ = MY_MAKE_MUSIC ("Music");
-                       }
-               $$->set_spot (*loc);
-       }
-       ;
-
-
 Prefix_composite_music:
-       Generic_prefix_music {
-               $$ = $1;
+       Generic_prefix_music_scm {
+               $$ = run_music_function (THIS, $1);
        }
        | CONTEXT simple_string '=' simple_string optional_context_mod Music {
                $$ = context_spec_music ($2, $4, $6, $5);
@@ -1207,9 +1066,9 @@ Prefix_composite_music:
                $$->set_spot (@$);
 
                $$->set_property ("element", mp->self_scm ());
-               scm_gc_unprotect_object (mp->self_scm ());
-               $$->set_property ("numerator", scm_int2num (n));
-               $$->set_property ("denominator", scm_int2num (d));
+               mp->unprotect();
+               $$->set_property ("numerator", scm_from_int (n));
+               $$->set_property ("denominator", scm_from_int (d));
                $$->compress (Moment (Rational (n,d)));
 
        }
@@ -1222,7 +1081,7 @@ Prefix_composite_music:
 
                p->transpose (pitch_interval (from, to));
                $$->set_property ("element", p->self_scm ());
-               scm_gc_unprotect_object (p->self_scm ());
+               p->unprotect();
        }
        | mode_changing_head Grouped_music_list {
                if ($1 == ly_symbol2scm ("chords"))
@@ -1230,7 +1089,7 @@ Prefix_composite_music:
                  Music *chm = MY_MAKE_MUSIC ("UnrelativableMusic");
                  chm->set_property ("element", $2->self_scm ());
                  $$ = chm;
-                 scm_gc_unprotect_object ($2->self_scm ());
+                 $2->unprotect();
                }
                else
                {
@@ -1245,17 +1104,13 @@ Prefix_composite_music:
                {
                  Music *chm = MY_MAKE_MUSIC ("UnrelativableMusic");
                  chm->set_property ("element", $$->self_scm ());
-                 scm_gc_unprotect_object ($$->self_scm ());
+                 $$->unprotect();
                  $$ = chm;
                }
                THIS->lexer_->pop_state ();
        }
        | relative_music        { $$ = $1; }
        | re_rhythmed_music     { $$ = $1; }
-       | TAG embedded_scm Music {
-               tag_music ($3, $2, @$);
-               $$ = $3;
-       }
        ;
 
 mode_changing_head: 
@@ -1322,14 +1177,14 @@ relative_music:
                Music *m = $3;
                Pitch start = *unsmob_pitch ($2);
                $$ = make_music_relative (start, m);
-               scm_gc_unprotect_object (m->self_scm ());
+               m->unprotect();
        }
        | RELATIVE Composite_music {
                Music *m = $2;
 
                Pitch middle_c (0, 0, 0);
                $$ = make_music_relative (middle_c, m);
-               scm_gc_unprotect_object (m->self_scm ());
+               m->unprotect();
        }
        ;
 
@@ -1378,7 +1233,7 @@ re_rhythmed_music:
                all->set_property ("elements", scm_cons (voice->self_scm (),
                        lst));
                $$ = all;
-               scm_gc_unprotect_object (voice->self_scm ());
+               voice->unprotect ();
        }
        | LYRICSTO simple_string {
                THIS->lexer_->push_lyric_state ();
@@ -1387,7 +1242,7 @@ re_rhythmed_music:
                Music *music = $4;
                SCM name = $2;
                $$ = make_lyric_combine_music (name, music);
-               scm_gc_unprotect_object (music->self_scm ());
+               music->unprotect();
        }
        ;
 
@@ -1413,7 +1268,11 @@ property_operation:
        }
        | OVERRIDE simple_string embedded_scm '=' embedded_scm {
                $$ = scm_list_4 (ly_symbol2scm ("push"),
-                       scm_string_to_symbol ($2), $3, $5);
+                       scm_string_to_symbol ($2), $5, $3);
+       }
+       | OVERRIDE simple_string embedded_scm embedded_scm '=' embedded_scm {
+               $$ = scm_list_5 (ly_symbol2scm ("push"),
+                               scm_string_to_symbol ($2), $6, $4, $3);
        }
        | REVERT simple_string embedded_scm {
                $$ = scm_list_3 (ly_symbol2scm ("pop"),
@@ -1461,10 +1320,17 @@ context_prop_spec:
 music_property_def:
        OVERRIDE context_prop_spec embedded_scm '=' scalar {
                $$ = property_op_to_music (scm_list_4 (
-                       ly_symbol2scm ("poppush"),
+                       ly_symbol2scm ("push"),
                        scm_cadr ($2),
-                       $3, $5));
-               $$= context_spec_music (scm_car ($2), SCM_UNDEFINED, $$, SCM_EOL);
+                       $5, $3));
+               $$ = context_spec_music (scm_car ($2), SCM_UNDEFINED, $$, SCM_EOL);
+       }
+       | OVERRIDE context_prop_spec embedded_scm  embedded_scm '=' scalar {
+               $$ = property_op_to_music (scm_list_5 (
+                       ly_symbol2scm ("push"),
+                       scm_cadr ($2),
+                       $6, $4, $3));
+               $$ = context_spec_music (scm_car ($2), SCM_UNDEFINED, $$, SCM_EOL);
        }
        | REVERT context_prop_spec embedded_scm {
                $$ = property_op_to_music (scm_list_3 (
@@ -1514,6 +1380,9 @@ simple_string: STRING {
        | LYRICS_STRING {
                $$ = $1;
        }
+       | STRING_IDENTIFIER {
+               $$ = $1;
+       }
        ;
 
 scalar: string {
@@ -1532,7 +1401,7 @@ scalar: string {
                $$ = $1;
        }
        | DIGIT {
-               $$ = scm_int2num ($1);
+               $$ = scm_from_int ($1);
        }
        ;
 
@@ -1620,7 +1489,7 @@ chord_body_elements:
        /* empty */             { $$ = SCM_EOL; }
        | chord_body_elements chord_body_element {
                $$ = scm_cons ($2->self_scm (), $1);
-               scm_gc_unprotect_object ($2->self_scm ());
+               $2->unprotect ();
        }
        ;
 
@@ -1647,7 +1516,7 @@ chord_body_element:
                if (scm_is_number (check))
                {
                        int q = scm_to_int (check);
-                       n->set_property ("absolute-octave", scm_int2num (q-1));
+                       n->set_property ("absolute-octave", scm_from_int (q-1));
                }
 
                
@@ -1665,22 +1534,47 @@ chord_body_element:
                }
                $$ = n;
        }
+       | music_function_chord_body { 
+               $$ = run_music_function (THIS, $1);
+               $$->set_spot (@$);
+       }
        ;
 
+music_function_chord_body:
+       MUSIC_FUNCTION {
+               $$ = scm_list_2 ($1, make_input (@$));
+       }
+       | MUSIC_FUNCTION_MUSIC chord_body_element {
+               $$ = scm_list_3 ($1, make_input (@$),
+                                       $2->self_scm ());
+       }
+       | MUSIC_FUNCTION_SCM_MUSIC function_scm_argument chord_body_element {
+               $$ = scm_list_4 ($1, make_input (@$),
+                                       $2, $3->self_scm ());
+       }
+       | MUSIC_FUNCTION_SCM_SCM_MUSIC function_scm_argument function_scm_argument
+               chord_body_element {
+
+               $$ = scm_list_5 ($1, make_input (@$),
+                                       $2, $3, $4->self_scm ());
+       }
+       ;
+
+
 add_quote:
        ADDQUOTE string Music {
                SCM adder = ly_lily_module_constant ("add-quotable");
                
                scm_call_2 (adder, $2, $3->self_scm ());
-               scm_gc_unprotect_object ($3->self_scm ());
+               $3->unprotect();
        }
        ;
 
 command_element:
-       command_req {
+       command_event {
                $$ = MY_MAKE_MUSIC ("EventChord");
                $$->set_property ("elements", scm_cons ($1->self_scm (), SCM_EOL));
-               scm_gc_unprotect_object ($1->self_scm ());
+               $1->unprotect();
 
                $$-> set_spot (@$);
                $1-> set_spot (@$);
@@ -1699,23 +1593,23 @@ command_element:
        }
        | E_BRACKET_OPEN {
                Music *m = MY_MAKE_MUSIC ("LigatureEvent");
-               m->set_property ("span-direction", scm_int2num (START));
+               m->set_property ("span-direction", scm_from_int (START));
                m->set_spot (@$);
 
                $$ = MY_MAKE_MUSIC ("EventChord");
                $$->set_property ("elements", scm_cons (m->self_scm (), SCM_EOL));
-               scm_gc_unprotect_object (m->self_scm ());
+               m->unprotect();
                $$->set_spot (@$);
        }
        | E_BRACKET_CLOSE {
                Music *m = MY_MAKE_MUSIC ("LigatureEvent");
-               m->set_property ("span-direction", scm_int2num (STOP));
+               m->set_property ("span-direction", scm_from_int (STOP));
                m->set_spot (@$);
 
                $$ = MY_MAKE_MUSIC ("EventChord");
                $$->set_property ("elements", scm_cons (m->self_scm (), SCM_EOL));
                $$->set_spot (@$);
-               scm_gc_unprotect_object (m->self_scm ());
+               m->unprotect ();
        }
        | E_BACKSLASH {
                $$ = MY_MAKE_MUSIC ("VoiceSeparator");
@@ -1740,15 +1634,6 @@ command_element:
                $$ = context_spec_music (ly_symbol2scm ("Staff"), SCM_UNDEFINED,
                        $$, SCM_EOL);
        }
-       | BAR STRING                    {
-               Music *t = set_property_music (ly_symbol2scm ("whichBar"), $2);
-
-               Music *csm = context_spec_music (ly_symbol2scm ("Timing"), SCM_UNDEFINED,
-                                       t, SCM_EOL);
-               $$ = context_spec_music (ly_symbol2scm ("Score"), SCM_UNDEFINED, csm, SCM_EOL);
-               $$->set_spot (@$);
-               t->set_spot (@$);
-       }
        | PARTIAL duration_length       {
                Moment m = - unsmob_duration ($2)->get_length ();
                Music *p = set_property_music (ly_symbol2scm ( "measurePosition"),m.smobbed_copy ());
@@ -1759,30 +1644,24 @@ command_element:
                                        p, SCM_EOL);
                $$ = p;
        }
-       | CLEF STRING  {
-               SCM proc = ly_lily_module_constant ("make-clef-set");
 
-               SCM result = scm_call_1 (proc, $2);
-               scm_gc_protect_object (result);
-               $$ = unsmob_music (result);
-       }
        | TIME_T fraction  {
                SCM proc = ly_lily_module_constant ("make-time-signature-set");
 
                SCM result = scm_apply_2   (proc, scm_car ($2), scm_cdr ($2), SCM_EOL);
-               scm_gc_protect_object (result);
                $$ = unsmob_music (result);
+               $$->protect ();
        }
        | MARK scalar {
                SCM proc = ly_lily_module_constant ("make-mark-set");
 
                SCM result = scm_call_1 (proc, $2);
-               scm_gc_protect_object (result);
                $$ = unsmob_music (result);
+               $$->protect ();
        }
        ;
 
-command_req:
+command_event:
        E_TILDE {
                $$ = MY_MAKE_MUSIC ("PesOrFlexaEvent");
        }
@@ -1821,28 +1700,32 @@ post_events:
        | post_events post_event {
                $2->set_spot (@2);
                $$ = scm_cons ($2->self_scm (), $$);
-               scm_gc_unprotect_object ($2->self_scm ());
-       }
-       | post_events tagged_post_event {
-               $2 -> set_spot (@2);
-               $$ = scm_cons ($2->self_scm (), $$);
-               scm_gc_unprotect_object ($2->self_scm ());
+               $2->unprotect ();
        }
        ;
 
-
-tagged_post_event:
-       '-' TAG embedded_scm post_event {
-               tag_music ($4, $3, @$);
-               $$ = $4;
+music_function_event:
+       MUSIC_FUNCTION_MUSIC post_event {
+               $$ = scm_list_3 ($1, make_input (@$), $2->self_scm ());
+       }
+       | MUSIC_FUNCTION_SCM_MUSIC function_scm_argument post_event {
+               $$ = scm_list_4 ($1, make_input (@$), $2, $3->self_scm ());
+       }
+       | MUSIC_FUNCTION_SCM_SCM_MUSIC function_scm_argument function_scm_argument post_event {
+               $$ = scm_list_5 ($1, make_input (@$), $2, $3, $4->self_scm ());
        }
        ;
 
-
+       
 post_event:
        direction_less_event {
                $$ = $1;
        }
+       | '-' music_function_event {
+               Music *mus = run_music_function (THIS, $2);
+               mus->set_spot (@1);
+               $$ = mus;
+       }
        | HYPHEN {
                if (!THIS->lexer_->is_lyric_state ())
                        THIS->parser_error (@1, _ ("have to be in Lyric mode for lyrics"));
@@ -1855,12 +1738,12 @@ post_event:
        }
        | script_dir direction_reqd_event {
                if ($1)
-                       $2->set_property ("direction", scm_int2num ($1));
+                       $2->set_property ("direction", scm_from_int ($1));
                $$ = $2;
        }
        | script_dir direction_less_event {
                if ($1)
-                       $2->set_property ("direction", scm_int2num ($1));
+                       $2->set_property ("direction", scm_from_int ($1));
                $$ = $2;
        }
        | string_number_event
@@ -1869,7 +1752,7 @@ post_event:
 string_number_event:
        E_UNSIGNED {
                Music *s = MY_MAKE_MUSIC ("StringNumberEvent");
-               s->set_property ("string-number", scm_int2num ($1));
+               s->set_property ("string-number", scm_from_int ($1));
                s->set_spot (@$);
                $$ = s;
        }
@@ -1929,7 +1812,7 @@ direction_less_event:
        | tremolo_type  {
                Music *a = MY_MAKE_MUSIC ("TremoloEvent");
                a->set_spot (@$);
-               a->set_property ("tremolo-type", scm_int2num ($1));
+               a->set_property ("tremolo-type", scm_from_int ($1));
                $$ = a;
         }
        ;       
@@ -1950,9 +1833,9 @@ direction_reqd_event:
 
 octave_check:
        /**/ { $$ = SCM_EOL; }
-       | '='  { $$ = scm_int2num (0); }
-       | '=' sub_quotes { $$ = scm_int2num ($2); }
-       | '=' sup_quotes { $$ = scm_int2num ($2); }
+       | '='  { $$ = scm_from_int (0); }
+       | '=' sub_quotes { $$ = scm_from_int ($2); }
+       | '=' sup_quotes { $$ = scm_from_int ($2); }
        ;
 
 sup_quotes:
@@ -2038,7 +1921,7 @@ gen_text_def:
        }
        | DIGIT {
                Music *t = MY_MAKE_MUSIC ("FingerEvent");
-               t->set_property ("digit", scm_int2num ($1));
+               t->set_property ("digit", scm_from_int ($1));
                t->set_spot (@$);
                $$ = t;
        }
@@ -2133,7 +2016,7 @@ multiplied_duration:
 fraction:
        FRACTION { $$ = $1; }
        | UNSIGNED '/' UNSIGNED {
-               $$ = scm_cons (scm_int2num ($1), scm_int2num ($3));
+               $$ = scm_cons (scm_from_int ($1), scm_from_int ($3));
        }
        ;
 
@@ -2159,20 +2042,16 @@ tremolo_type:
 
 bass_number:
        DIGIT   {
-               $$ = scm_number_to_string (scm_int2num ($1), scm_int2num (10));
-               $$ = scm_list_2 (ly_lily_module_constant ("number-markup"),
-                               $$);
+               $$ = scm_from_int ($1);
        }
        | UNSIGNED {
-               $$ = scm_number_to_string (scm_int2num ($1), scm_int2num (10));
-               $$ = scm_list_2 (ly_lily_module_constant ("number-markup"),
-                               $$);
+               $$ = scm_from_int ($1);
        }
        | STRING { $$ = $1; }
        | full_markup { $$ = $1; }
        ;
 
-bass_mod:
+figured_bass_alteration:
        '-'     { $$ = -2; }
        | '+'   { $$ = 2; }
        | '!'   { $$ = 0; }
@@ -2182,40 +2061,73 @@ bass_figure:
        FIGURE_SPACE {
                Music *bfr = MY_MAKE_MUSIC ("BassFigureEvent");
                $$ = bfr->self_scm ();
-               scm_gc_unprotect_object ($$);
+               bfr->unprotect ();
+               bfr->set_spot (@1);
        }
        | bass_number  {
                Music *bfr = MY_MAKE_MUSIC ("BassFigureEvent");
                $$ = bfr->self_scm ();
 
-               bfr->set_property ("figure", $1);
+               if (scm_is_number ($1))
+                       bfr->set_property ("figure", $1);
+               else if (Text_interface::is_markup ($1))
+                       bfr->set_property ("text", $1);
 
-               scm_gc_unprotect_object ($$);
+               bfr->unprotect ();
+               bfr->set_spot (@1);
+       }
+       | bass_figure ']' {
+               $$ = $1;
+               unsmob_music ($1)->set_property ("bracket-stop", SCM_BOOL_T);
        }
-       | bass_figure bass_mod {
+       | bass_figure figured_bass_alteration {
                Music *m = unsmob_music ($1);
                if ($2) {
                        SCM salter = m->get_property ("alteration");
                        int alter = scm_is_number (salter) ? scm_to_int (salter) : 0;
                        m->set_property ("alteration",
-                               scm_int2num (alter + $2));
+                               scm_from_int (alter + $2));
                } else {
-                       m->set_property ("alteration", scm_int2num (0));
+                       m->set_property ("alteration", scm_from_int (0));
                }
        }
+       | bass_figure figured_bass_modification  {
+               Music *m = unsmob_music ($1);
+               if ($2 == ly_symbol2scm ("plus"))
+                       {
+                       m->set_property ("augmented", SCM_BOOL_T);
+                       }
+               else if ($2 == ly_symbol2scm ("slash"))
+                       {
+                       m->set_property ("diminished", SCM_BOOL_T);
+                       }
+               else if ($2 == ly_symbol2scm ("exclamation"))
+                       {
+                       m->set_property ("no-continuation", SCM_BOOL_T);
+                       }
+       }
        ;
 
-br_bass_figure:
-       '[' bass_figure {
-               $$ = $2;
-               unsmob_music ($$)->set_property ("bracket-start", SCM_BOOL_T);
+
+figured_bass_modification:
+       E_PLUS          {
+               $$ = ly_symbol2scm ("plus");
        }
-       | bass_figure   {
-               $$ = $1;
+       | E_EXCLAMATION {
+               $$ = ly_symbol2scm ("exclamation");
+       }
+       | '/'           {
+               $$ = ly_symbol2scm ("slash");
        }
-       | br_bass_figure ']' {
+       ;
+
+br_bass_figure:
+       bass_figure {
                $$ = $1;
-               unsmob_music ($1)->set_property ("bracket-stop", SCM_BOOL_T);
+       }
+       | '[' bass_figure {
+               $$ = $2;
+               unsmob_music ($$)->set_property ("bracket-start", SCM_BOOL_T);
        }
        ;
 
@@ -2260,7 +2172,7 @@ simple_element:
                if (scm_is_number ($4))
                {
                        int q = scm_to_int ($4);
-                       n->set_property ("absolute-octave", scm_int2num (q-1));
+                       n->set_property ("absolute-octave", scm_from_int (q-1));
                }
 
                if ($3 % 2)
@@ -2270,7 +2182,7 @@ simple_element:
 
                Music *v = MY_MAKE_MUSIC ("EventChord");
                v->set_property ("elements", scm_list_1 (n->self_scm ()));
-               scm_gc_unprotect_object (n->self_scm ());
+               n->unprotect ();
 
                v->set_spot (@$);
                n->set_spot (@$);
@@ -2283,7 +2195,7 @@ simple_element:
 
                Music *v = MY_MAKE_MUSIC ("EventChord");
                v->set_property ("elements", scm_list_1 (n->self_scm ()));
-               scm_gc_unprotect_object (n->self_scm ());
+               n->unprotect ();
                v->set_spot (@$);
                n->set_spot (@$);
                $$ = v;
@@ -2314,27 +2226,27 @@ simple_element:
                velt->set_property ("elements", scm_list_1 (ev->self_scm ()));
                velt->set_spot (@$);
 
-               scm_gc_unprotect_object (ev->self_scm ());
+               ev->unprotect();
 
                $$ = velt;
        }
        | MULTI_MEASURE_REST optional_notemode_duration         {
                SCM proc = ly_lily_module_constant ("make-multi-measure-rest");
                SCM mus = scm_call_2 (proc, $2, make_input (@$));
-               scm_gc_protect_object (mus);
                $$ = unsmob_music (mus);
+               $$->protect ();
        }
        
        | lyric_element optional_notemode_duration      {
                if (!THIS->lexer_->is_lyric_state ())
                        THIS->parser_error (@1, _ ("have to be in Lyric mode for lyrics"));
 
-               Music *lreq = MY_MAKE_MUSIC ("LyricEvent");
-               lreq->set_property ("text", $1);
-               lreq->set_property ("duration",$2);
-               lreq->set_spot (@$);
+               Music *levent = MY_MAKE_MUSIC ("LyricEvent");
+               levent->set_property ("text", $1);
+               levent->set_property ("duration",$2);
+               levent->set_spot (@$);
                Music *velt = MY_MAKE_MUSIC ("EventChord");
-               velt->set_property ("elements", scm_list_1 (lreq->self_scm ()));
+               velt->set_property ("elements", scm_list_1 (levent->self_scm ()));
 
                $$= velt;
        }
@@ -2350,7 +2262,7 @@ lyric_element:
                $$ = $1;
        }
        | LYRICS_STRING {
-               $$ = make_simple_markup ($1);
+               $$ = $1;
        }
        ;
 
@@ -2457,7 +2369,7 @@ number_factor:
 
 bare_number:
        UNSIGNED        {
-               $$ = scm_int2num ($1);
+               $$ = scm_from_int ($1);
        }
        | REAL          {
                $$ = $1;
@@ -2466,10 +2378,10 @@ bare_number:
                $$ = $1;
        }
        | REAL NUMBER_IDENTIFIER        {
-               $$ = scm_make_real (scm_to_double ($1) *scm_to_double ($2));
+               $$ = scm_from_double (scm_to_double ($1) *scm_to_double ($2));
        }
        | UNSIGNED NUMBER_IDENTIFIER    {
-               $$ = scm_make_real ($1 *scm_to_double ($2));
+               $$ = scm_from_double ($1 *scm_to_double ($2));
        }
        ;
 
@@ -2605,7 +2517,7 @@ simple_markup:
        } '{' score_body '}' {
                Score * sc = $4;
                $$ = scm_list_2 (ly_lily_module_constant ("score-markup"), sc->self_scm ());
-               scm_gc_unprotect_object (sc->self_scm ());
+               sc->unprotect ();
                THIS->lexer_->pop_state ();
        }
        | MARKUP_HEAD_SCM0 embedded_scm {
@@ -2670,6 +2582,9 @@ Lily_lexer::try_special_identifiers (SCM *destination, SCM sid)
        if (scm_is_string (sid)) {
                *destination = sid;
                return STRING_IDENTIFIER;
+       } else if (unsmob_book (sid)) {
+               *destination = unsmob_book (sid)->clone ()->self_scm ();
+               return BOOK_IDENTIFIER;
        } else if (scm_is_number (sid)) {
                *destination = sid;
                return NUMBER_IDENTIFIER;
@@ -2699,7 +2614,7 @@ Lily_lexer::try_special_identifiers (SCM *destination, SCM sid)
 
                *destination = p->self_scm ();
                return OUTPUT_DEF_IDENTIFIER;
-       } else if (Text_interface::markup_p (sid)) {
+       } else if (Text_interface::is_markup (sid)) {
                *destination = sid;
                if (is_lyric_state ())
                        return LYRIC_MARKUP_IDENTIFIER;
@@ -2717,7 +2632,7 @@ property_op_to_music (SCM op)
        SCM symbol = scm_cadr (op);
        SCM args = scm_cddr (op);
        SCM grob_val = SCM_UNDEFINED;
-       SCM grob_sym = SCM_UNDEFINED;
+       SCM grob_path = SCM_UNDEFINED;
        SCM val = SCM_UNDEFINED;
        
        if (tag == ly_symbol2scm ("assign"))
@@ -2727,16 +2642,16 @@ property_op_to_music (SCM op)
                }
        else if (tag == ly_symbol2scm ("unset"))
                m = MY_MAKE_MUSIC ("PropertyUnset");
-       else if (tag == ly_symbol2scm ("poppush")
-                || tag == ly_symbol2scm ("push"))
+       else if (tag == ly_symbol2scm ("push"))
                {
                m = MY_MAKE_MUSIC ("OverrideProperty");
-               grob_sym = scm_car (args);
-               grob_val = scm_cadr (args);
+               grob_val = scm_car (args);
+               grob_path = scm_cdr (args);
+               m->set_property ("pop-first", SCM_BOOL_T);
                }
        else if (tag == ly_symbol2scm ("pop")) {
                m = MY_MAKE_MUSIC ("RevertProperty");
-               grob_sym = scm_car (args);
+               grob_path = args;
                }
 
        m->set_property ("symbol", symbol);
@@ -2745,23 +2660,8 @@ property_op_to_music (SCM op)
                m->set_property ("value", val);
        if (grob_val != SCM_UNDEFINED)
                m->set_property ("grob-value", grob_val);
-
-       if (grob_sym != SCM_UNDEFINED)
-               {
-               bool itc = do_internal_type_checking_global;
-               /* UGH.
-               */
-               bool autobeam = ly_is_equal (symbol, ly_symbol2scm ("autoBeamSettings"));
-               if (autobeam)
-                       do_internal_type_checking_global = false;
-               m->set_property ("grob-property", grob_sym);
-               if (autobeam)
-                       do_internal_type_checking_global = itc;
-               }
-
-       if (tag == ly_symbol2scm ("poppush"))
-               m->set_property ("pop-first", SCM_BOOL_T);
-
+       if (grob_path != SCM_UNDEFINED)
+               m->set_property ("grob-property-path", grob_path);
 
        return m;
 }
@@ -2772,7 +2672,7 @@ context_spec_music (SCM type, SCM id, Music *m, SCM ops)
        Music *csm = MY_MAKE_MUSIC ("ContextSpeccedMusic");
 
        csm->set_property ("element", m->self_scm ());
-       scm_gc_unprotect_object (m->self_scm ());
+       m->unprotect ();
 
        csm->set_property ("context-type",
                scm_is_symbol (type) ? type : scm_string_to_symbol (type));
@@ -2795,6 +2695,174 @@ get_next_unique_lyrics_context_id ()
 {
        static int new_context_count;
        char s[128];
-       snprintf (s, 1024, "uniqueContext%d", new_context_count++);
+       snprintf (s, sizeof (s)-1, "uniqueContext%d", new_context_count++);
        return scm_makfrom0str (s);
 }
+
+
+Music *
+run_music_function (Lily_parser *parser, SCM expr)
+{
+       SCM func = scm_car (expr);
+       Input *loc = unsmob_input (scm_cadr (expr));
+       SCM args = scm_cddr (expr);
+       SCM sig = scm_object_property (func, ly_symbol2scm ("music-function-signature"));
+
+       SCM type_check_proc = ly_lily_module_constant ("type-check-list");
+       bool ok  = true;
+
+       if (!to_boolean (scm_call_3  (type_check_proc, scm_cadr (expr), sig, args)))
+       {
+               parser->error_level_ = 1;
+               ok = false;
+       }
+
+       SCM m = SCM_EOL;
+       if (ok)
+               m = scm_apply_0 (func, scm_cons (parser->self_scm(),
+                                                scm_cdr (expr)));
+
+
+       Music* retval = 0;
+       if (unsmob_music (m))
+               {
+               retval = unsmob_music (m);
+               retval->protect ();
+               }
+       else
+               {
+               if (ok)
+                       loc->error (_ ("music head function must return Music object")); 
+               retval = MY_MAKE_MUSIC ("Music");
+               }
+       retval->set_spot (*loc);
+       return retval;
+}
+
+bool
+is_regular_identifier (SCM id)
+{
+  String str = ly_scm2string (id);
+  char const *s = str.to_str0 ();
+
+  bool v = true;
+#if 0
+  isalpha (*s);
+  s++;
+#endif
+  while (*s && v)
+   {
+        v = v && isalnum (*s);
+        s++;
+   }
+  return v;
+}
+
+
+SCM
+get_first_context_id (SCM type, Music *m)
+{
+       SCM id = m->get_property ("context-id");
+       if (SCM_BOOL_T == scm_equal_p (m->get_property ("context-type"), type)
+           && scm_is_string (m->get_property ("context-id"))
+           && scm_c_string_length (id) > 0)
+       {
+               return id;
+       }
+       return SCM_EOL;
+}
+
+SCM
+make_simple_markup (SCM a)
+{
+       return a;
+}
+
+bool
+is_duration (int t)
+{
+  return t && t == 1 << intlog2 (t);
+}
+
+void
+set_music_properties (Music *p, SCM a)
+{
+  for (SCM k = a; scm_is_pair (k); k = scm_cdr (k))
+       p->internal_set_property (scm_caar (k), scm_cdar (k));
+}
+
+
+SCM
+make_chord_step (int step, int alter)
+{
+       if (step == 7)
+               alter += FLAT;
+
+       while (step < 0)
+               step += 7;
+       Pitch m ((step -1) / 7, (step - 1) % 7, alter);
+       return m.smobbed_copy ();
+}
+
+
+SCM
+make_chord (SCM pitch, SCM dur, SCM modification_list)
+{
+       SCM chord_ctor = ly_lily_module_constant ("construct-chord");
+       SCM ch = scm_call_3 (chord_ctor, pitch, dur, modification_list);
+
+       unsmob_music (ch)->protect();   
+       return ch;
+}
+
+
+/* Todo: actually also use apply iso. call too ...  */
+bool
+ly_input_procedure_p (SCM x)
+{
+       return ly_is_procedure (x)
+               || (scm_is_pair (x) && ly_is_procedure (scm_car (x)));
+}
+
+Music*
+set_property_music (SCM sym, SCM value)
+{
+       Music *p = MY_MAKE_MUSIC ("PropertySet");
+       p->set_property ("symbol", sym);
+       p->set_property ("value", value);
+       return p;
+}
+
+Music*
+make_music_relative (Pitch start, Music *music)
+{
+       Music *relative = MY_MAKE_MUSIC ("RelativeOctaveMusic");
+       relative->set_property ("element", music->self_scm ());
+       
+       Pitch last = music->to_relative_octave (start);
+       if (lily_1_8_relative)
+               music->set_property ("last-pitch", last.smobbed_copy ());
+       return relative;
+}
+
+Music *
+make_lyric_combine_music (SCM name, Music *music)
+{
+       Music *combine = MY_MAKE_MUSIC ("LyricCombineMusic");
+       combine->set_property ("element", music->self_scm ());
+       combine->set_property ("associated-context", name);
+       return combine;
+}
+
+
+int
+yylex (YYSTYPE *s, YYLTYPE *loc, void *v)
+{
+       Lily_parser *pars = (Lily_parser*) v;
+       Lily_lexer *lex = pars->lexer_;
+
+       lex->lexval = (void*) s;
+       lex->lexloc = loc;
+       lex->prepare_for_next_token ();
+       return lex->yylex ();
+}