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/*
* Copyright 2017 WebAssembly Community Group participants
*
* 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.
*/
#ifndef wasm_ir_find_all_h
#define wasm_ir_find_all_h
#include <wasm-traversal.h>
namespace wasm {
// Find all instances of a certain node type
template<typename T> struct FindAll {
std::vector<T*> list;
FindAll(Expression* ast) {
struct Finder
: public PostWalker<Finder, UnifiedExpressionVisitor<Finder>> {
std::vector<T*>* list;
void visitExpression(Expression* curr) {
if (curr->is<T>()) {
(*list).push_back(curr->cast<T>());
}
}
};
Finder finder;
finder.list = &list;
finder.walk(ast);
}
bool has() { return !list.empty(); }
};
// Find all pointers to instances of a certain node type
struct PointerFinder
: public PostWalker<PointerFinder, UnifiedExpressionVisitor<PointerFinder>> {
Expression::Id id;
std::vector<Expression**>* list;
void visitExpression(Expression* curr) {
if (curr->_id == id) {
(*list).push_back(getCurrentPointer());
}
}
};
template<typename T> struct FindAllPointers {
std::vector<Expression**> list;
// Note that a pointer may be to the function->body itself, so we must
// take \ast by reference.
FindAllPointers(Expression*& ast) {
PointerFinder finder;
finder.id = T::SpecificId;
finder.list = &list;
finder.walk(ast);
}
};
} // namespace wasm
#endif // wasm_ir_find_all_h
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