Mesa (master): glsl: Use | action in the lexer source to avoid duplicating the float action

[Neil Roberts]

Module: Mesa
Branch: master
Commit: c97cbd7e3d9faae1185a740d2a94c48e9a75d8b9
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=c97cbd7e3d9faae1185a740d2a94c48e9a75d8b9

Author: Neil Roberts <neil at linux.intel.com>
Date:   Wed Nov 26 17:57:42 2014 +0000

glsl: Use | action in the lexer source to avoid duplicating the float action

Flex and lex have a special action ‘|’ which means to use the same action as
the next rule. We can use this to reduce a bit of code duplication in the
rules for the various float literal formats.

Reviewed-by: Matt Turner <mattst88 at gmail.com>

---

 src/glsl/glsl_lexer.ll |   15 +++------------
 1 file changed, 3 insertions(+), 12 deletions(-)

diff --git a/src/glsl/glsl_lexer.ll b/src/glsl/glsl_lexer.ll
index 419a07b..57c46be 100644
--- a/src/glsl/glsl_lexer.ll
+++ b/src/glsl/glsl_lexer.ll
@@ -450,18 +450,9 @@ layout		{
 			    return LITERAL_INTEGER(8);
 			}
 
-[0-9]+\.[0-9]+([eE][+-]?[0-9]+)?[fF]?	{
-			    yylval->real = _mesa_strtof(yytext, NULL);
-			    return FLOATCONSTANT;
-			}
-\.[0-9]+([eE][+-]?[0-9]+)?[fF]?		{
-			    yylval->real = _mesa_strtof(yytext, NULL);
-			    return FLOATCONSTANT;
-			}
-[0-9]+\.([eE][+-]?[0-9]+)?[fF]?		{
-			    yylval->real = _mesa_strtof(yytext, NULL);
-			    return FLOATCONSTANT;
-			}
+[0-9]+\.[0-9]+([eE][+-]?[0-9]+)?[fF]?	|
+\.[0-9]+([eE][+-]?[0-9]+)?[fF]?		|
+[0-9]+\.([eE][+-]?[0-9]+)?[fF]?		|
 [0-9]+[eE][+-]?[0-9]+[fF]?		{
 			    yylval->real = _mesa_strtof(yytext, NULL);
 			    return FLOATCONSTANT;