cmFortranParser: Parse keywords as lexical tokens

Teach the lexer to match and return specific Fortran keywords as tokens.
Update the parser to use these instead of always using a WORD token and
then checking the text.  This avoids extra string comparisons and will
allow more grammar productions to be unambiguously added later for
additional Fortran statements.

1 files changed, 6 insertions, 0 deletions

diff --git a/Source/cmFortranLexer.in.l b/Source/cmFortranLexer.in.l
index aa879e8..6870f7c 100644
--- a/Source/cmFortranLexer.in.l
+++ b/Source/cmFortranLexer.in.l
@@ -151,6 +151,12 @@ $[ \t]*endif    { return F90PPR_ENDIF; }
 
 =|=>                     { return ASSIGNMENT_OP; }
 
+[Ee][Nn][Dd] { return END; }
+[Ii][Nn][Cc][Ll][Uu][Dd][Ee] { return INCLUDE; }
+[Ii][Nn][Tt][Ee][Rr][Ff][Aa][Cc][Ee] { return INTERFACE; }
+[Mm][Oo][Dd][Uu][Ll][Ee] { return MODULE; }
+[Uu][Ss][Ee] { return USE; }
+
 [a-zA-Z_][a-zA-Z_0-9]* {
   yylvalp->string = strdup(yytext);
   return WORD;