Method Evaluate

Source/cmGeneratorExpressionNode.cxx:3775–3800

  int NumExpectedParameters() const override { return OneOrMoreParameters; }

  std::string Evaluate(
    std::vector<std::string> const& parameters, cm::GenEx::Evaluation* eval,
    GeneratorExpressionContent const* content,
    cmGeneratorExpressionDAGChecker* /*dagCheckerParent*/) const override
  {
    if (parameters.size() > 2) {
      reportError(eval, content->GetOriginalExpression(),
                  "$<SOURCE_EXISTS:...> expression requires at most two "
                  "parameters.");
      return std::string{};
    }

    if (parameters[0].empty()) {
      reportError(eval, content->GetOriginalExpression(),
                  "$<SOURCE_EXISTS:src> expression requires a "
                  "non-empty source name.");
      return std::string{};
    }

    cmSourceFile* sourceFile = nullptr;
    if (!GetSourceFile(cmMakeRange(parameters), eval, content, sourceFile)) {
      return std::string{};
    }

    return sourceFile ? "1" : "0";
  }
} sourceExistsNode;

static const struct SourcePropertyNode : public cmGeneratorExpressionNode