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65 lines
1.8 KiB
65 lines
1.8 KiB
/* Distributed under the OSI-approved BSD 3-Clause License. See accompanying
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file Copyright.txt or https://cmake.org/licensing for details. */
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#include "cmGeneratorExpressionLexer.h"
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cmGeneratorExpressionLexer::cmGeneratorExpressionLexer() = default;
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static void InsertText(const char* upto, const char* c,
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std::vector<cmGeneratorExpressionToken>& result)
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{
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if (upto != c) {
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result.emplace_back(cmGeneratorExpressionToken::Text, upto, c - upto);
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}
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}
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std::vector<cmGeneratorExpressionToken> cmGeneratorExpressionLexer::Tokenize(
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const std::string& input)
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{
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std::vector<cmGeneratorExpressionToken> result;
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if (input.find('$') == std::string::npos) {
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result.emplace_back(cmGeneratorExpressionToken::Text, input.c_str(),
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input.size());
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return result;
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}
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const char* c = input.c_str();
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const char* upto = c;
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for (; *c; ++c) {
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switch (*c) {
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case '$':
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if (c[1] == '<') {
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InsertText(upto, c, result);
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result.emplace_back(cmGeneratorExpressionToken::BeginExpression, c,
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2);
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upto = c + 2;
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++c;
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SawBeginExpression = true;
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}
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break;
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case '>':
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InsertText(upto, c, result);
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result.emplace_back(cmGeneratorExpressionToken::EndExpression, c, 1);
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upto = c + 1;
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SawGeneratorExpression = SawBeginExpression;
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break;
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case ':':
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InsertText(upto, c, result);
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result.emplace_back(cmGeneratorExpressionToken::ColonSeparator, c, 1);
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upto = c + 1;
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break;
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case ',':
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InsertText(upto, c, result);
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result.emplace_back(cmGeneratorExpressionToken::CommaSeparator, c, 1);
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upto = c + 1;
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break;
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default:
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break;
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}
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}
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InsertText(upto, c, result);
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return result;
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}
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