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// Copyright 2020 The Tint Authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include "src/ast/if_statement.h"
#include "src/ast/else_statement.h"
namespace tint {
namespace ast {
IfStatement::IfStatement()
: Statement(), body_(std::make_unique<BlockStatement>()) {}
IfStatement::IfStatement(std::unique_ptr<Expression> condition,
std::unique_ptr<BlockStatement> body)
: Statement(), condition_(std::move(condition)), body_(std::move(body)) {}
IfStatement::IfStatement(const Source& source,
std::unique_ptr<Expression> condition,
std::unique_ptr<BlockStatement> body)
: Statement(source),
condition_(std::move(condition)),
body_(std::move(body)) {}
IfStatement::IfStatement(IfStatement&&) = default;
IfStatement::~IfStatement() = default;
bool IfStatement::IsIf() const {
return true;
}
bool IfStatement::IsValid() const {
if (condition_ == nullptr || !condition_->IsValid()) {
return false;
}
if (body_ == nullptr || !body_->IsValid()) {
return false;
}
bool found_else = false;
for (const auto& el : else_statements_) {
// Else statement must be last
if (found_else)
return false;
if (el == nullptr || !el->IsValid())
return false;
if (el->condition() == nullptr)
found_else = true;
}
return true;
}
void IfStatement::to_str(std::ostream& out, size_t indent) const {
make_indent(out, indent);
out << "If{" << std::endl;
// Open if conditional
make_indent(out, indent + 2);
out << "(" << std::endl;
condition_->to_str(out, indent + 4);
// Close if conditional
make_indent(out, indent + 2);
out << ")" << std::endl;
// Open if body
make_indent(out, indent + 2);
out << "{" << std::endl;
if (body_ != nullptr) {
for (const auto& stmt : *body_) {
stmt->to_str(out, indent + 4);
}
}
// Close the if body
make_indent(out, indent + 2);
out << "}" << std::endl;
// Close the If
make_indent(out, indent);
out << "}" << std::endl;
for (const auto& e : else_statements_) {
e->to_str(out, indent);
}
}
} // namespace ast
} // namespace tint