xref: /arkcompiler/ets_frontend/es2panda/ir/expressions/functionExpression.cpp (revision 3af6ab5f)

/**
 * Copyright (c) 2021 Huawei Device Co., Ltd.
 * 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 "functionExpression.h"

#include <compiler/core/pandagen.h>
#include <typescript/checker.h>
#include <ir/astDump.h>
#include <ir/base/scriptFunction.h>
#include <ir/expressions/identifier.h>
#include <ir/statements/variableDeclarator.h>

namespace panda::es2panda::ir {

void FunctionExpression::Iterate(const NodeTraverser &cb) const
{
    cb(func_);
}

void FunctionExpression::Dump(ir::AstDumper *dumper) const
{
    dumper->Add({{"type", "FunctionExpression"}, {"function", func_}});
}

void FunctionExpression::Compile(compiler::PandaGen *pg) const
{
    pg->DefineFunction(func_, func_, func_->Scope()->InternalName());
}

checker::Type *FunctionExpression::Check(checker::Checker *checker) const
{
    binder::Variable *funcVar = nullptr;

    if (func_->Parent()->Parent() && func_->Parent()->Parent()->IsVariableDeclarator() &&
        func_->Parent()->Parent()->AsVariableDeclarator()->Id()->IsIdentifier()) {
        funcVar = func_->Parent()->Parent()->AsVariableDeclarator()->Id()->AsIdentifier()->Variable();
    }

    checker::ScopeContext scopeCtx(checker, func_->Scope());

    auto *signatureInfo = checker->Allocator()->New<checker::SignatureInfo>(checker->Allocator());
    checker->CheckFunctionParameterDeclarations(func_->Params(), signatureInfo);

    auto *signature =
        checker->Allocator()->New<checker::Signature>(signatureInfo, checker->GlobalResolvingReturnType());
    checker::Type *funcType = checker->CreateFunctionTypeWithSignature(signature);

    if (funcVar && !funcVar->TsType()) {
        funcVar->SetTsType(funcType);
    }

    CHECK_NOT_NULL(signature);
    signature->SetReturnType(checker->HandleFunctionReturn(func_));

    func_->Body()->Check(checker);

    return funcType;
}

void FunctionExpression::UpdateSelf(const NodeUpdater &cb, [[maybe_unused]] binder::Binder *binder)
{
    func_ = std::get<ir::AstNode *>(cb(func_))->AsScriptFunction();
}

}  // namespace panda::es2panda::ir