92 lines
2.3 KiB
C
92 lines
2.3 KiB
C
|
// Copyright (c) 2013 The Chromium Authors. All rights reserved.
|
||
|
|
// Use of this source code is governed by a BSD-style license that can be
|
||
|
|
// found in the LICENSE file.
|
||
|
|
|
||
|
|
#ifndef TOOLS_GN_VALUE_H_
|
||
|
|
#define TOOLS_GN_VALUE_H_
|
||
|
|
|
||
|
|
#include "base/basictypes.h"
|
||
|
|
#include "base/logging.h"
|
||
|
|
#include "base/strings/string_piece.h"
|
||
|
|
#include "tools/gn/err.h"
|
||
|
|
|
||
|
|
class ParseNode;
|
||
|
|
|
||
|
|
// Represents a variable value in the interpreter.
|
||
|
|
class Value {
|
||
|
|
public:
|
||
|
|
enum Type {
|
||
|
|
NONE = 0,
|
||
|
|
INTEGER,
|
||
|
|
STRING,
|
||
|
|
LIST
|
||
|
|
};
|
||
|
|
|
||
|
|
Value();
|
||
|
|
Value(const ParseNode* origin, Type t);
|
||
|
|
Value(const ParseNode* origin, int64 int_val);
|
||
|
|
Value(const ParseNode* origin, const base::StringPiece& str_val);
|
||
|
|
~Value();
|
||
|
|
|
||
|
|
Type type() const { return type_; }
|
||
|
|
|
||
|
|
// Returns a string describing the given type.
|
||
|
|
static const char* DescribeType(Type t);
|
||
|
|
|
||
|
|
// Returns the node that made this. May be NULL.
|
||
|
|
const ParseNode* origin() const { return origin_; }
|
||
|
|
void set_origin(const ParseNode* o) { origin_ = o; }
|
||
|
|
|
||
|
|
int64& int_value() {
|
||
|
|
DCHECK(type_ == INTEGER);
|
||
|
|
return int_value_;
|
||
|
|
}
|
||
|
|
const int64& int_value() const {
|
||
|
|
DCHECK(type_ == INTEGER);
|
||
|
|
return int_value_;
|
||
|
|
}
|
||
|
|
|
||
|
|
std::string& string_value() {
|
||
|
|
DCHECK(type_ == STRING);
|
||
|
|
return string_value_;
|
||
|
|
}
|
||
|
|
const std::string& string_value() const {
|
||
|
|
DCHECK(type_ == STRING);
|
||
|
|
return string_value_;
|
||
|
|
}
|
||
|
|
|
||
|
|
std::vector<Value>& list_value() {
|
||
|
|
DCHECK(type_ == LIST);
|
||
|
|
return list_value_;
|
||
|
|
}
|
||
|
|
const std::vector<Value>& list_value() const {
|
||
|
|
DCHECK(type_ == LIST);
|
||
|
|
return list_value_;
|
||
|
|
}
|
||
|
|
|
||
|
|
// Returns the current value converted to an int, normally used for
|
||
|
|
// boolean operations. Undefined variables, empty lists, and empty strings
|
||
|
|
// are all interpreted as 0, otherwise 1.
|
||
|
|
int64 InterpretAsInt() const;
|
||
|
|
|
||
|
|
// Converts the given value to a string.
|
||
|
|
std::string ToString() const;
|
||
|
|
|
||
|
|
// Verifies that the value is of the given type. If it isn't, returns
|
||
|
|
// false and sets the error.
|
||
|
|
bool VerifyTypeIs(Type t, Err* err) const;
|
||
|
|
|
||
|
|
// Compares values. Only the "value" is compared, not the origin.
|
||
|
|
bool operator==(const Value& other) const;
|
||
|
|
bool operator!=(const Value& other) const;
|
||
|
|
|
||
|
|
private:
|
||
|
|
Type type_;
|
||
|
|
std::string string_value_;
|
||
|
|
int64 int_value_;
|
||
|
|
std::vector<Value> list_value_;
|
||
|
|
const ParseNode* origin_;
|
||
|
|
};
|
||
|
|
|
||
|
|
#endif // TOOLS_GN_VALUE_H_
|