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// Copyright 2015 Google Inc. All rights reserved
//
// 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 RULE_H_
#define RULE_H_
#include <functional>
#include <string>
#include <vector>
#include "loc.h"
#include "log.h"
#include "stmt.h"
#include "string_piece.h"
#include "symtab.h"
using namespace std;
class Value;
class Rule {
public:
Rule();
Loc cmd_loc() const { return Loc(loc.filename, cmd_lineno); }
string DebugString() const;
vector<Symbol> outputs;
vector<Symbol> inputs;
vector<Symbol> order_only_inputs;
vector<Symbol> output_patterns;
bool is_double_colon;
bool is_suffix_rule;
vector<Value*> cmds;
Loc loc;
int cmd_lineno;
private:
void Error(const string& msg) { ERROR_LOC(loc, "%s", msg.c_str()); }
};
struct RuleVarAssignment {
vector<Symbol> outputs;
StringPiece lhs;
StringPiece rhs;
AssignOp op;
};
// If |rule| is not NULL, |rule_var| is filled. If the expression
// after the terminator |term| is needed (this happens only when
// |term| is '='), |after_term_fn| will be called to obtain the right
// hand side.
void ParseRule(Loc& loc,
StringPiece line,
char term,
const function<string()>& after_term_fn,
Rule** rule,
RuleVarAssignment* rule_var);
#endif // RULE_H_
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