Changeset 9ed4f94 for src/Parser/lex.ll

Timestamp:

Aug 30, 2017, 8:08:01 AM (6 years ago)

Author:

Peter A. Buhr <pabuhr@…>

Branches:

aaron-thesis, arm-eh, cleanup-dtors, deferred_resn, demangler, enum, forall-pointer-decay, jacob/cs343-translation, jenkins-sandbox, master, new-ast, new-ast-unique-expr, new-env, no_list, persistent-indexer, pthread-emulation, qualifiedEnum, resolv-new, with_gc

Children:

e5fccf4

Parents:

fc1ef62

Message:

update error message printing and add column to parsing errors

File:

• src/Parser/lex.ll (modified) (8 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 : Tue Aug 22 22:43:39 2017
- * Update Count     : 558
+ * Last Modified On : Wed Aug 30 07:53:24 2017
+ * Update Count     : 583
  */
 
@@ -19 +19 @@
 
 %{
-// This lexer assumes the program has been preprocessed by cpp. Hence, all user level preprocessor directive have been
+// The lexer assumes the program has been preprocessed by cpp. Hence, all user level preprocessor directive have been
 // performed and removed from the source. The only exceptions are preprocessor directives passed to the compiler (e.g.,
 // line-number directives) and C/C++ style comments, which are ignored.
@@ -25 +25 @@
 //**************************** Includes and Defines ****************************
 
+unsigned int column = 0;                                                                // position of the end of the last token parsed
+#define YY_USER_ACTION column += yyleng;                                // trigger before each matching rule's action
+
 #include <string>
 #include <cstdio>                                                                               // FILENAME_MAX
+using namespace std;
 
 #include "ParseNode.h"
@@ -32 +36 @@
 
 char *yyfilename;
-std::string *strtext;                                                                   // accumulate parts of character and string constant value
+string *strtext;                                                                                // accumulate parts of character and string constant value
 
 #define RETURN_LOCN(x)          yylval.tok.loc.file = yyfilename; yylval.tok.loc.line = yylineno; return( x )
-#define RETURN_VAL(x)           yylval.tok.str = new std::string( yytext ); RETURN_LOCN( x )
+#define RETURN_VAL(x)           yylval.tok.str = new string( yytext ); RETURN_LOCN( x )
 #define RETURN_CHAR(x)          yylval.tok.str = nullptr; RETURN_LOCN( x )
 #define RETURN_STR(x)           yylval.tok.str = strtext; RETURN_LOCN( x )
 
 #define WHITE_RETURN(x)         // do nothing
-#define NEWLINE_RETURN()        WHITE_RETURN( '\n' )
+#define NEWLINE_RETURN()        column = 0; WHITE_RETURN( '\n' )
 #define ASCIIOP_RETURN()        RETURN_CHAR( (int)yytext[0] ) // single character operator
 #define NAMEDOP_RETURN(x)       RETURN_CHAR( x )                        // multichar operator, with a name
@@ -154 +158 @@
                 memcpy( &filename, begin_string + 1, length );  // copy file name from yytext
                 filename[ length ] = '\0';                                              // terminate string with sentinel
-                //std::cout << "file " << filename << " line " << lineno << std::endl;
+                //cout << "file " << filename << " line " << lineno << endl;
                 yylineno = lineno;
                 yyfilename = filename;
@@ -302 +306 @@
 
                                 /* character constant, allows empty value */
-({cwide_prefix}[_]?)?['] { BEGIN QUOTE; rm_underscore(); strtext = new std::string( yytext, yyleng ); }
+({cwide_prefix}[_]?)?['] { BEGIN QUOTE; rm_underscore(); strtext = new string( yytext, yyleng ); }
 <QUOTE>[^'\\\n]* { strtext->append( yytext, yyleng ); }
 <QUOTE>['\n]    { BEGIN 0; strtext->append( yytext, yyleng ); RETURN_STR(CHARACTERconstant); }
@@ -308 +312 @@
 
                                 /* string constant */
-({swide_prefix}[_]?)?["] { BEGIN STRING; rm_underscore(); strtext = new std::string( yytext, yyleng ); }
+({swide_prefix}[_]?)?["] { BEGIN STRING; rm_underscore(); strtext = new string( yytext, yyleng ); }
 <STRING>[^"\\\n]* { strtext->append( yytext, yyleng ); }
 <STRING>["\n]   { BEGIN 0; strtext->append( yytext, yyleng ); RETURN_STR(STRINGliteral); }
@@ -422 +426 @@
 }
 
-                                /* unknown characters */
-.                               { printf("unknown character(s):\"%s\" on line %d\n", yytext, yylineno); }
+                                /* unknown character */
+.                               { yyerror( "unknown character" ); }
 
 %%
+// ----end of lexer----
+
+void yyerror( const char * errmsg ) {
+        cout << (yyfilename ? yyfilename : "*unknown file*") << ':' << yylineno << ':' << column - yyleng + 1
+                 << ':' << SemanticError::error_str() << errmsg << " at token \"" << (yytext[0] == '\0' ? "EOF" : yytext) << '"' << endl;
+}
 
 // Local Variables: //