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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 "cmGeneratorExpressionEvaluator.h"
#include "cmAlgorithms.h"
#include "cmGeneratorExpressionContext.h"
#include "cmGeneratorExpressionNode.h"
#include <algorithm>
#include <sstream>
GeneratorExpressionContent::GeneratorExpressionContent(
const char* startContent, size_t length)
: StartContent(startContent)
, ContentLength(length)
{
}
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<std::vector<cmGeneratorExpressionEvaluator*> >::const_iterator
pit) const
{
std::string result;
const std::vector<
std::vector<cmGeneratorExpressionEvaluator*> >::const_iterator pend =
this->ParamChildren.end();
for (; pit != pend; ++pit) {
std::vector<cmGeneratorExpressionEvaluator*>::const_iterator it =
pit->begin();
const std::vector<cmGeneratorExpressionEvaluator*>::const_iterator end =
pit->end();
for (; it != end; ++it) {
if (node->RequiresLiteralInput()) {
if ((*it)->GetType() != cmGeneratorExpressionEvaluator::Text) {
reportError(context, this->GetOriginalExpression(), "$<" +
identifier + "> expression requires literal input.");
return std::string();
}
}
result += (*it)->Evaluate(context, dagChecker);
if (context->HadError) {
return std::string();
}
}
if ((pit + 1) != pend) {
result += ",";
}
}
if (node->RequiresLiteralInput()) {
std::vector<std::string> parameters;
parameters.push_back(result);
return node->Evaluate(parameters, context, this, dagChecker);
}
return result;
}
std::string GeneratorExpressionContent::Evaluate(
cmGeneratorExpressionContext* context,
cmGeneratorExpressionDAGChecker* dagChecker) const
{
std::string identifier;
{
std::vector<cmGeneratorExpressionEvaluator*>::const_iterator it =
this->IdentifierChildren.begin();
const std::vector<cmGeneratorExpressionEvaluator*>::const_iterator end =
this->IdentifierChildren.end();
for (; it != end; ++it) {
identifier += (*it)->Evaluate(context, dagChecker);
if (context->HadError) {
return std::string();
}
}
}
const cmGeneratorExpressionNode* node =
cmGeneratorExpressionNode::GetNode(identifier);
if (!node) {
reportError(context, this->GetOriginalExpression(),
"Expression did not evaluate to a known generator expression");
return std::string();
}
if (!node->GeneratesContent()) {
if (node->NumExpectedParameters() == 1 &&
node->AcceptsArbitraryContentParameter()) {
if (this->ParamChildren.empty()) {
reportError(context, this->GetOriginalExpression(),
"$<" + 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();
{
std::vector<std::vector<cmGeneratorExpressionEvaluator*> >::const_iterator
pit = this->ParamChildren.begin();
const std::vector<
std::vector<cmGeneratorExpressionEvaluator*> >::const_iterator pend =
this->ParamChildren.end();
const bool acceptsArbitraryContent =
node->AcceptsArbitraryContentParameter();
int counter = 1;
for (; pit != pend; ++pit, ++counter) {
if (acceptsArbitraryContent && counter == numExpected) {
std::string lastParam = this->ProcessArbitraryContent(
node, identifier, context, dagChecker, pit);
parameters.push_back(lastParam);
return std::string();
}
std::string parameter;
std::vector<cmGeneratorExpressionEvaluator*>::const_iterator it =
pit->begin();
const std::vector<cmGeneratorExpressionEvaluator*>::const_iterator end =
pit->end();
for (; it != end; ++it) {
parameter += (*it)->Evaluate(context, dagChecker);
if (context->HadError) {
return std::string();
}
}
parameters.push_back(parameter);
}
}
if ((numExpected > cmGeneratorExpressionNode::DynamicParameters &&
(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.");
}
if (numExpected == cmGeneratorExpressionNode::OneOrZeroParameters &&
parameters.size() > 1) {
reportError(context, this->GetOriginalExpression(), "$<" + identifier +
"> expression requires one or zero parameters.");
}
return std::string();
}
GeneratorExpressionContent::~GeneratorExpressionContent()
{
cmDeleteAll(this->IdentifierChildren);
std::for_each(this->ParamChildren.begin(), this->ParamChildren.end(),
cmDeleteAll<std::vector<cmGeneratorExpressionEvaluator*> >);
}
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