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/*
* Copyright (C) 2016 The Android Open Source Project
*
* 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 EXPRESSION_H_
#define EXPRESSION_H_
#include <android-base/macros.h>
#include <android-base/logging.h>
#include <hidl-util/StringHelper.h>
#include <string>
namespace android {
struct AST;
struct Define;
struct Expression {
Expression() {}
virtual ~Expression() {}
enum Type {
S32 = 0, // 0b00
S64 = 1, // 0b01
U32 = 2, // 0b10
U64 = 3, // 0b11
UNKNOWN = -1
};
static std::string getTypeDescription(Type type) {
switch (type) {
case S32: return "S32";
case S64: return "S64";
case U32: return "U32";
case U64: return "U64";
case UNKNOWN:
default:
return "UNKNOWN";
}
}
static std::string getTypeName(Type type) {
switch (type) {
case S32: return "int32_t";
case S64: return "int64_t";
case U32: return "uint32_t";
case U64: return "uint64_t";
case UNKNOWN:
default:
return "/* UNKNOWN */";
}
}
static Type integralType(const std::string& integer);
static Type coalesceTypes(Type lhs, Type rhs);
static Expression *parenthesize(Expression *inner);
static Expression *atom(Type type, const std::string &value, bool isId = false);
static Expression *unary(std::string op, Expression *rhs);
static Expression *binary(Expression *lhs, std::string op, Expression *rhs);
static Expression *ternary(Expression *lhs, Expression *mhs, Expression *rhs);
static Expression *arraySubscript(std::string id, Expression *subscript);
static Expression *functionCall(std::string id, std::vector<Expression *> *args);
virtual Type getType(const AST &scope) = 0;
// convert this expression to a string.
// atomCase: when it comes to atoms, force identifiers into a certain case.
// numerical values are not affected.
virtual std::string toString(StringHelper::Case atomCase = StringHelper::kNoCase) = 0;
private:
DISALLOW_COPY_AND_ASSIGN(Expression);
};
} // namespace android
#endif // EXPRESSION_H_
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