1 files changed, 73 insertions, 0 deletions
diff --git a/Source/cmExprLexer.in.l b/Source/cmExprLexer.in.l
new file mode 100644
index 000000000..db9018f99
--- /dev/null
+++ b/Source/cmExprLexer.in.l
@@ -0,0 +1,73 @@
+%{
+/*============================================================================
+  CMake - Cross Platform Makefile Generator
+  Copyright 2000-2009 Kitware, Inc., Insight Software Consortium
+
+  Distributed under the OSI-approved BSD License (the "License");
+  see accompanying file Copyright.txt for details.
+
+  This software is distributed WITHOUT ANY WARRANTY; without even the
+  implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+  See the License for more information.
+============================================================================*/
+/*
+
+This file must be translated to C and modified to build everywhere.
+
+Run flex like this:
+
+  flex --prefix=cmExpr_yy --header-file=cmExprLexer.h -ocmExprLexer.cxx cmExprLexer.in.l
+
+Modify cmExprLexer.cxx:
+  - remove TABs
+  - remove "yyscanner" argument from these methods:
+      yy_fatal_error, cmExpr_yyalloc, cmExpr_yyrealloc, cmExpr_yyfree
+  - remove all YY_BREAK lines occurring right after return statements
+  - change while ( 1 ) to for(;;)
+
+Modify cmExprLexer.h:
+  - remove TABs
+  - remove the yy_init_globals function
+  - remove the block that includes unistd.h
+  - remove #line directives (avoids bogus warning on old Sun)
+
+*/
+
+#include "cmStandardLexer.h"
+
+#include "cmExprParserHelper.h"
+
+/* Replace the lexer input function.  */
+#undef YY_INPUT
+#define YY_INPUT(buf, result, max_size) \
+  { result = yyextra->LexInput(buf, max_size); }
+
+/* Include the set of tokens from the parser.  */
+#include "cmExprParserTokens.h"
+
+/*--------------------------------------------------------------------------*/
+%}
+
+%option reentrant
+%option noyywrap
+%pointer
+
+%%
+
+[0-9][0-9]* { yylvalp->Number = atoi(yytext); return exp_NUMBER; } 
+
+"+" { return exp_PLUS; }
+"-" { return exp_MINUS; } 
+"*" { return exp_TIMES; } 
+"/" { return exp_DIVIDE; } 
+"%" { return exp_MOD; } 
+"\|" { return exp_OR; } 
+"&" { return exp_AND; } 
+"^" { return exp_XOR; } 
+"~" { return exp_NOT; } 
+"<<" { return exp_SHIFTLEFT; } 
+">>" { return exp_SHIFTRIGHT; } 
+"(" { return exp_OPENPARENT; }
+")" { return exp_CLOSEPARENT; }
+
+%%