lexer.ll: remove unused patterns, avoid backing up

diff --git a/lily/lexer.ll b/lily/lexer.ll
index 7cda144e263c9720868330a988904f7fd45dee89..5743f44964d9e7ba99a393903d53dcd5a0faaeeb 100644 (file)
--- a/lily/lexer.ll
+++ b/lily/lexer.ll
@@ -135,7 +135,6 @@ PUNCT               [?!:'`]
 ACCENT         \\[`'"^]
 NATIONAL       [\001-\006\021-\027\031\036]
 TEX            {AA}|-|{PUNCT}|{ACCENT}|{NATIONAL}
-WORD           {A}{AN}*
 DASHED_WORD            {A}({AN}|-)*
 DASHED_KEY_WORD                \\{DASHED_WORD}
 
@@ -148,7 +147,6 @@ E_UNSIGNED  \\{N}+
 FRACTION       {N}+\/{N}+
 INT            -?{UNSIGNED}
 REAL           ({INT}\.{N}*)|(-?\.{N}+)
-KEYWORD                \\{WORD}
 WHITE          [ \n\t\f\r]
 HORIZONTALWHITE                [ \t]
 BLACK          [^ \n\t\f\r]
@@ -165,7 +163,7 @@ BOM_UTF8    \357\273\277
 
 
 <*>\r          {
-       // windows-suck-suck-suck
+       // swallow and ignore carriage returns
 }
 
 <extratoken>{ANY_CHAR} {
@@ -263,15 +261,15 @@ BOM_UTF8  \357\273\277
        this->here_input ().get_source_file ()->set_line (here_input ().start (), i);
 }
 
-<version>.     {
+<version>{ANY_CHAR}    {
        LexerError (_ ("quoted string expected after \\version").c_str ());
        yy_pop_state ();
 }
-<sourcefilename>.      {
+<sourcefilename>{ANY_CHAR}     {
        LexerError (_ ("quoted string expected after \\sourcefilename").c_str ());
        yy_pop_state ();
 }
-<sourcefileline>.      {
+<sourcefileline>{ANY_CHAR}     {
        LexerError (_ ("integer expected after \\sourcefileline").c_str ());
        yy_pop_state ();
 }
@@ -284,12 +282,6 @@ BOM_UTF8   \357\273\277
        "%"+"}"         {
                yy_pop_state ();
        }
-       <<EOF>>         {
-               LexerError (_ ("EOF found inside a comment").c_str ());
-               is_main_input_ = false; // should be safe , can't have \include in --safe.
-               if (! close_input ()) 
-                 yyterminate (); // can't move this, since it actually rets a YY_NULL
-       }
 }
 
 
@@ -313,7 +305,7 @@ BOM_UTF8    \357\273\277
        new_input (s, sources_);
        yy_pop_state ();
 }
-<incl>\\{BLACK}*{WHITE} { /* got the include identifier */
+<incl>\\{BLACK}*{WHITE}? { /* got the include identifier */
        string s = YYText () + 1;
        strip_trailing_white (s);
        if (s.length () && (s[s.length () - 1] == ';'))
@@ -332,7 +324,7 @@ BOM_UTF8    \357\273\277
            scm_display (sid, err);
          }
 }
-<incl>\"[^"]*   { // backup rule
+<incl,version,sourcefilename>\"[^"]*   { // backup rule
        error (_ ("end quote missing"));
        exit (1);
 }
@@ -419,11 +411,15 @@ BOM_UTF8  \357\273\277
                yylval.scm =  scan_fraction (YYText ());
                return FRACTION;
        }
-
        {DIGIT}         {
                yylval.i = String_convert::dec2int (string (YYText ()));
                return DIGIT;
        }
+       {UNSIGNED}/\/[^0-9] { // backup rule
+               yylval.i = String_convert::dec2int (string (YYText ()));
+               return UNSIGNED;
+       }
+       {UNSIGNED}/\/   | // backup rule
        {UNSIGNED}              {
                yylval.i = String_convert::dec2int (string (YYText ()));
                return UNSIGNED;
@@ -464,6 +460,11 @@ BOM_UTF8   \357\273\277
                yylval.scm =  scan_fraction (YYText ());
                return FRACTION;
        }
+       {UNSIGNED}/\/[^0-9] { // backup rule
+               yylval.i = String_convert::dec2int (string (YYText ()));
+               return UNSIGNED;
+       }
+       {UNSIGNED}/\/   | // backup rule
        {UNSIGNED}              {
                yylval.i = String_convert::dec2int (string (YYText ()));
                return UNSIGNED;
@@ -504,6 +505,11 @@ BOM_UTF8   \357\273\277
                yylval.scm =  scan_fraction (YYText ());
                return FRACTION;
        }
+       {UNSIGNED}/\/[^0-9] { // backup rule
+               yylval.i = String_convert::dec2int (string (YYText ()));
+               return UNSIGNED;
+       }
+       {UNSIGNED}/\/   | // backup rule
        {UNSIGNED}              {
                yylval.i = String_convert::dec2int (string (YYText ()));
                return UNSIGNED;
@@ -605,7 +611,14 @@ BOM_UTF8   \357\273\277
 }
 
 <*><<EOF>> {
-       if (is_main_input_)
+       if (YY_START == longcomment)
+       {
+               LexerError (_ ("EOF found inside a comment").c_str ());
+               is_main_input_ = false; // should be safe , can't have \include in --safe.
+               if (!close_input ())
+                 yyterminate (); // can't move this, since it actually rets a YY_NULL
+       }
+       else if (is_main_input_)
        {
                /* 2 = init.ly + current file.
                   > because we're before closing, but is_main_input_ should
@@ -630,12 +643,7 @@ BOM_UTF8   \357\273\277
        }
 }
 
-{WORD} {
-       return scan_bare_word (YYText ());
-}
-{KEYWORD}      {
-       return scan_escaped_word (YYText () + 1);
-}
+-{UNSIGNED}    | // backup rule
 {REAL}         {
        Real r;
        int cnv = sscanf (YYText (), "%lf", &r);
@@ -645,6 +653,10 @@ BOM_UTF8   \357\273\277
        yylval.scm = scm_from_double (r);
        return REAL;
 }
+-\.    { // backup rule
+       yylval.scm = scm_from_double (0.0);
+       return REAL;
+}
 
 {UNSIGNED}     {
        yylval.i = String_convert::dec2int (string (YYText ()));