Changeset 4e0168a

Timestamp:

Oct 13, 2024, 4:59:53 PM (5 weeks ago)

Author:

Peter A. Buhr <pabuhr@…>

Branches:

master

Children:

02ea981

Parents:

c565d68

Message:

documentation, update C23 attribute lexing

File:

• src/Parser/lex.ll (modified) (5 diffs)

src/Parser/lex.ll

@@ -10 +10 @@
  * Created On       : Sat Sep 22 08:58:10 2001
  * Last Modified By : Peter A. Buhr
- * Last Modified On : Sun Oct 13 10:03:28 2024
- * Update Count     : 869
+ * Last Modified On : Sun Oct 13 16:49:47 2024
+ * Update Count     : 876
  */
 
@@ -175 +175 @@
                                 // operator {op_unary_pre_post}|{op_binary_over}|{op_binary_not_over}
 
-                                // C23 attributes
-attr_string "\""[^\"]*"\""
-attr_arg_opt ({hv_white}*"("{hv_white}*{attr_string}{hv_white}*")")?
+                                // C23 attributes, CPP also handles missing quote delimiter
+attr_string "\""([^\"\\\n]|{escape_seq})*["\n]
+attr_arg_opt ({hv_white}*"("({hv_white}*{attr_string}{hv_white}*)+")")?
 attributes "deprecated"{attr_arg_opt}|"fallthrough"|"nodiscard"{attr_arg_opt}|"maybe_unused"|"noreturn"|"_Noreturn"|"unsequenced"|"unused"|"reproducible"|{identifier}{hv_white}*"::"{hv_white}*{identifier}
 
 %x COMMENT
-%x BKQUOTE
 %x QUOTE
 %x STRING
@@ -382 +381 @@
                                 /* C23 attributes */
 "[["{hv_white}*{attributes}({hv_white}*","{hv_white}*{attributes})*{hv_white}*"]]" {
-        strtext = new string( &yytext[2], yyleng - 4 );         // remove [[]]
+        strtext = new string( &yytext[2], yyleng - 4 );         // remove delimiters "[[" and "]]"
         RETURN_STR(C23_ATTRIBUTE);
 }
@@ -396 +395 @@
 {hex_floating_constant} { NUMERIC_RETURN(FLOATINGconstant); }
 
-                                /* character constant, allows empty value */
+                                /* character constant, allows empty value, CPP also handles missing quote delimiter */
 ({cwide_prefix}[_]?)?['] { BEGIN QUOTE; rm_underscore(); strtext = new string( yytext, yyleng ); }
 <QUOTE>[^'\\\n]* { strtext->append( yytext, yyleng ); }
@@ -402 +401 @@
                                 /* ' stop editor highlighting */
 
-                                /* string constant */
+                                /* string constant, CPP also handles missing quote delimiter */
 ({swide_prefix}[_]?)?["] { BEGIN STRING; rm_underscore(); strtext = new string( yytext, yyleng ); }
 <STRING>[^"\\\n]* { strtext->append( yytext, yyleng ); }