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92 lines
2.7 KiB
92 lines
2.7 KiB
/*
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* Copyright (C) 2016 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef EXPRESSION_H_
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#define EXPRESSION_H_
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#include <android-base/macros.h>
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#include <android-base/logging.h>
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#include <hidl-util/StringHelper.h>
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#include <string>
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namespace android {
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struct AST;
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struct Define;
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struct Expression {
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Expression() {}
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virtual ~Expression() {}
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enum Type {
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S32 = 0, // 0b00
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S64 = 1, // 0b01
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U32 = 2, // 0b10
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U64 = 3, // 0b11
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UNKNOWN = -1
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};
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static std::string getTypeDescription(Type type) {
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switch (type) {
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case S32: return "S32";
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case S64: return "S64";
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case U32: return "U32";
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case U64: return "U64";
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case UNKNOWN:
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default:
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return "UNKNOWN";
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}
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}
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static std::string getTypeName(Type type) {
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switch (type) {
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case S32: return "int32_t";
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case S64: return "int64_t";
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case U32: return "uint32_t";
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case U64: return "uint64_t";
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case UNKNOWN:
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default:
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return "/* UNKNOWN */";
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}
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}
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static Type integralType(const std::string& integer);
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static Type coalesceTypes(Type lhs, Type rhs);
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static Expression *parenthesize(Expression *inner);
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static Expression *atom(Type type, const std::string &value, bool isId = false);
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static Expression *unary(std::string op, Expression *rhs);
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static Expression *binary(Expression *lhs, std::string op, Expression *rhs);
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static Expression *ternary(Expression *lhs, Expression *mhs, Expression *rhs);
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static Expression *arraySubscript(std::string id, Expression *subscript);
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static Expression *functionCall(std::string id, std::vector<Expression *> *args);
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virtual Type getType(const AST &scope) = 0;
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// convert this expression to a string.
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// atomCase: when it comes to atoms, force identifiers into a certain case.
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// numerical values are not affected.
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virtual std::string toString(StringHelper::Case atomCase = StringHelper::kNoCase) = 0;
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private:
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DISALLOW_COPY_AND_ASSIGN(Expression);
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};
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} // namespace android
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#endif // EXPRESSION_H_
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