Merge topic 'generator-expression-refactor'

91011bd cmGeneratorExpression: Port users to two-stage processing
f1eacf0 cmGeneratorExpression: Re-write for multi-stage evaluation

1 files changed, 85 insertions, 0 deletions

diff --git a/Source/cmGeneratorExpressionLexer.cxx b/Source/cmGeneratorExpressionLexer.cxx
new file mode 100644
index 0000000..cd71ec0
--- /dev/null
+++ b/Source/cmGeneratorExpressionLexer.cxx
@@ -0,0 +1,85 @@
+/*============================================================================
+  CMake - Cross Platform Makefile Generator
+  Copyright 2012 Stephen Kelly <steveire@gmail.com>
+
+  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.
+============================================================================*/
+#include "cmGeneratorExpressionLexer.h"
+
+
+//----------------------------------------------------------------------------
+cmGeneratorExpressionLexer::cmGeneratorExpressionLexer()
+  : SawBeginExpression(false), SawGeneratorExpression(false)
+{
+
+}
+
+//----------------------------------------------------------------------------
+static void InsertText(const char *upto, const char *c,
+                        std::vector<cmGeneratorExpressionToken> &result)
+{
+  if (upto != c)
+    {
+    result.push_back(cmGeneratorExpressionToken(
+                          cmGeneratorExpressionToken::Text, upto, c - upto));
+    }
+}
+
+//----------------------------------------------------------------------------
+std::vector<cmGeneratorExpressionToken>
+cmGeneratorExpressionLexer::Tokenize(const char *input)
+{
+  std::vector<cmGeneratorExpressionToken> result;
+  if (!input)
+    return result;
+
+  const char *c = input;
+  const char *upto = c;
+
+  for ( ; *c; ++c)
+  {
+  if(c[0] == '$' && c[1] == '<')
+    {
+    InsertText(upto, c, result);
+    upto = c;
+    result.push_back(cmGeneratorExpressionToken(
+                      cmGeneratorExpressionToken::BeginExpression, upto, 2));
+    upto = c + 2;
+    ++c;
+    SawBeginExpression = true;
+    }
+  else if(c[0] == '>')
+    {
+    InsertText(upto, c, result);
+    upto = c;
+    result.push_back(cmGeneratorExpressionToken(
+                        cmGeneratorExpressionToken::EndExpression, upto, 1));
+    upto = c + 1;
+    SawGeneratorExpression = SawBeginExpression;
+    }
+  else if(c[0] == ':')
+    {
+    InsertText(upto, c, result);
+    upto = c;
+    result.push_back(cmGeneratorExpressionToken(
+                        cmGeneratorExpressionToken::ColonSeparator, upto, 1));
+    upto = c + 1;
+    }
+  else if(c[0] == ',')
+    {
+    InsertText(upto, c, result);
+    upto = c;
+    result.push_back(cmGeneratorExpressionToken(
+                        cmGeneratorExpressionToken::CommaSeparator, upto, 1));
+    upto = c + 1;
+    }
+  }
+  InsertText(upto, c, result);
+
+  return result;
+}