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/*============================================================================
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;
}
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