1 files changed, 57 insertions, 0 deletions
diff --git a/Source/LexerParser/cmExprLexer.in.l b/Source/LexerParser/cmExprLexer.in.l
new file mode 100644
index 0000000..25ddba4
--- /dev/null
+++ b/Source/LexerParser/cmExprLexer.in.l
@@ -0,0 +1,57 @@
+%{
+/* Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
+   file Copyright.txt or https://cmake.org/licensing for details.  */
+/*
+
+This file must be translated to C++ and modified to build everywhere.
+
+Run flex >= 2.6 like this:
+
+  flex --nounistd -DFLEXINT_H --prefix=cmExpr_yy --header-file=cmExprLexer.h -ocmExprLexer.cxx cmExprLexer.in.l
+
+Modify cmExprLexer.cxx:
+  - remove trailing whitespace: sed -i 's/\s*$//' cmExprLexer.h cmExprLexer.cxx
+  - remove blank lines at end of file
+  - #include "cmStandardLexer.h" at the top
+  - add cast in yy_scan_bytes for loop condition of _yybytes_len to size_t
+
+*/
+
+/* IWYU pragma: no_forward_declare yyguts_t */
+
+#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; }
+
+%%