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/* Distributed under the OSI-approved BSD 3-Clause License. See accompanying
file Copyright.txt or https://cmake.org/licensing for details. */
#include "cmGeneratorExpressionEvaluator.h"
#include <sstream>
#include "cmGeneratorExpressionContext.h"
#include "cmGeneratorExpressionNode.h"
GeneratorExpressionContent::GeneratorExpressionContent(
const char* startContent, size_t length)
: StartContent(startContent)
, ContentLength(length)
{
}
GeneratorExpressionContent::~GeneratorExpressionContent() = default;
std::string GeneratorExpressionContent::GetOriginalExpression() const
{
return std::string(this->StartContent, this->ContentLength);
}
std::string GeneratorExpressionContent::ProcessArbitraryContent(
const cmGeneratorExpressionNode* node, const std::string& identifier,
cmGeneratorExpressionContext* context,
cmGeneratorExpressionDAGChecker* dagChecker,
std::vector<cmGeneratorExpressionEvaluatorVector>::const_iterator pit) const
{
std::string result;
const auto pend = this->ParamChildren.end();
for (; pit != pend; ++pit) {
for (auto& pExprEval : *pit) {
if (node->RequiresLiteralInput()) {
if (pExprEval->GetType() != cmGeneratorExpressionEvaluator::Text) {
reportError(context, this->GetOriginalExpression(),
"$<" + identifier +
"> expression requires literal input.");
return std::string();
}
}
result += pExprEval->Evaluate(context, dagChecker);
if (context->HadError) {
return std::string();
}
}
if ((pit + 1) != pend) {
result += ",";
}
}
if (node->RequiresLiteralInput()) {
std::vector<std::string> parameters;
parameters.push_back(result);
return node->Evaluate(parameters, context, this, dagChecker);
}
return result;
}
std::string GeneratorExpressionContent::Evaluate(
cmGeneratorExpressionContext* context,
cmGeneratorExpressionDAGChecker* dagChecker) const
{
std::string identifier;
{
for (auto& pExprEval : this->IdentifierChildren) {
identifier += pExprEval->Evaluate(context, dagChecker);
if (context->HadError) {
return std::string();
}
}
}
const cmGeneratorExpressionNode* node =
cmGeneratorExpressionNode::GetNode(identifier);
if (!node) {
reportError(context, this->GetOriginalExpression(),
"Expression did not evaluate to a known generator expression");
return std::string();
}
if (!node->GeneratesContent()) {
if (node->NumExpectedParameters() == 1 &&
node->AcceptsArbitraryContentParameter()) {
if (this->ParamChildren.empty()) {
reportError(context, this->GetOriginalExpression(),
"$<" + identifier + "> expression requires a parameter.");
}
} else {
std::vector<std::string> parameters;
this->EvaluateParameters(node, identifier, context, dagChecker,
parameters);
}
return std::string();
}
std::vector<std::string> parameters;
this->EvaluateParameters(node, identifier, context, dagChecker, parameters);
if (context->HadError) {
return std::string();
}
return node->Evaluate(parameters, context, this, dagChecker);
}
std::string GeneratorExpressionContent::EvaluateParameters(
const cmGeneratorExpressionNode* node, const std::string& identifier,
cmGeneratorExpressionContext* context,
cmGeneratorExpressionDAGChecker* dagChecker,
std::vector<std::string>& parameters) const
{
const int numExpected = node->NumExpectedParameters();
{
auto pit = this->ParamChildren.begin();
const auto pend = this->ParamChildren.end();
const bool acceptsArbitraryContent =
node->AcceptsArbitraryContentParameter();
int counter = 1;
for (; pit != pend; ++pit, ++counter) {
if (acceptsArbitraryContent && counter == numExpected) {
parameters.push_back(this->ProcessArbitraryContent(
node, identifier, context, dagChecker, pit));
return std::string();
}
std::string parameter;
for (auto& pExprEval : *pit) {
parameter += pExprEval->Evaluate(context, dagChecker);
if (context->HadError) {
return std::string();
}
}
parameters.push_back(std::move(parameter));
}
}
if ((numExpected > cmGeneratorExpressionNode::DynamicParameters &&
static_cast<unsigned int>(numExpected) != parameters.size())) {
if (numExpected == 0) {
reportError(context, this->GetOriginalExpression(),
"$<" + identifier + "> expression requires no parameters.");
} else if (numExpected == 1) {
reportError(context, this->GetOriginalExpression(),
"$<" + identifier +
"> expression requires "
"exactly one parameter.");
} else {
std::ostringstream e;
e << "$<" + identifier + "> expression requires " << numExpected
<< " comma separated parameters, but got " << parameters.size()
<< " instead.";
reportError(context, this->GetOriginalExpression(), e.str());
}
return std::string();
}
if (numExpected == cmGeneratorExpressionNode::OneOrMoreParameters &&
parameters.empty()) {
reportError(context, this->GetOriginalExpression(),
"$<" + identifier +
"> expression requires at least one parameter.");
} else if (numExpected == cmGeneratorExpressionNode::TwoOrMoreParameters &&
parameters.size() < 2) {
reportError(context, this->GetOriginalExpression(),
"$<" + identifier +
"> expression requires at least two parameters.");
} else if (numExpected == cmGeneratorExpressionNode::OneOrZeroParameters &&
parameters.size() > 1) {
reportError(context, this->GetOriginalExpression(),
"$<" + identifier +
"> expression requires one or zero parameters.");
}
return std::string();
}
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