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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/tint/clone_context.h"
#include <string>
#include "src/tint/program_builder.h"
#include "src/tint/utils/map.h"
TINT_INSTANTIATE_TYPEINFO(tint::Cloneable);
namespace tint {
CloneContext::ListTransforms::ListTransforms() = default;
CloneContext::ListTransforms::~ListTransforms() = default;
CloneContext::CloneContext(ProgramBuilder* to, Program const* from, bool auto_clone_symbols)
: dst(to), src(from) {
if (auto_clone_symbols) {
// Almost all transforms will want to clone all symbols before doing any
// work, to avoid any newly created symbols clashing with existing symbols
// in the source program and causing them to be renamed.
from->Symbols().Foreach([&](Symbol s, const std::string&) { Clone(s); });
}
}
CloneContext::CloneContext(ProgramBuilder* builder) : CloneContext(builder, nullptr, false) {}
CloneContext::~CloneContext() = default;
Symbol CloneContext::Clone(Symbol s) {
if (!src) {
return s; // In-place clone
}
return utils::GetOrCreate(cloned_symbols_, s, [&]() -> Symbol {
if (symbol_transform_) {
return symbol_transform_(s);
}
return dst->Symbols().New(src->Symbols().NameFor(s));
});
}
void CloneContext::Clone() {
dst->AST().Copy(this, &src->AST());
}
ast::FunctionList CloneContext::Clone(const ast::FunctionList& v) {
ast::FunctionList out;
out.reserve(v.size());
for (const ast::Function* el : v) {
out.Add(Clone(el));
}
return out;
}
const tint::Cloneable* CloneContext::CloneCloneable(const Cloneable* object) {
// If the input is nullptr, there's nothing to clone - just return nullptr.
if (object == nullptr) {
return nullptr;
}
// Was Replace() called for this object?
auto it = replacements_.find(object);
if (it != replacements_.end()) {
return it->second();
}
// Attempt to clone using the registered replacer functions.
auto& typeinfo = object->TypeInfo();
for (auto& transform : transforms_) {
if (typeinfo.Is(transform.typeinfo)) {
if (auto* transformed = transform.function(object)) {
return transformed;
}
break;
}
}
// No transform for this type, or the transform returned nullptr.
// Clone with T::Clone().
return object->Clone(this);
}
void CloneContext::CheckedCastFailure(const Cloneable* got, const TypeInfo& expected) {
TINT_ICE(Clone, Diagnostics()) << "Cloned object was not of the expected type\n"
<< "got: " << got->TypeInfo().name << "\n"
<< "expected: " << expected.name;
}
diag::List& CloneContext::Diagnostics() const {
return dst->Diagnostics();
}
CloneContext::CloneableTransform::CloneableTransform() = default;
CloneContext::CloneableTransform::CloneableTransform(const CloneableTransform&) = default;
CloneContext::CloneableTransform::~CloneableTransform() = default;
} // namespace tint