1 // Copyright 2015 Google Inc. All rights reserved 2 // 3 // Licensed under the Apache License, Version 2.0 (the "License"); 4 // you may not use this file except in compliance with the License. 5 // You may obtain a copy of the License at 6 // 7 // http://www.apache.org/licenses/LICENSE-2.0 8 // 9 // Unless required by applicable law or agreed to in writing, software 10 // distributed under the License is distributed on an "AS IS" BASIS, 11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 // See the License for the specific language governing permissions and 13 // limitations under the License. 14 15 #ifndef RULE_H_ 16 #define RULE_H_ 17 18 #include <functional> 19 #include <string> 20 #include <vector> 21 22 #include "loc.h" 23 #include "log.h" 24 #include "stmt.h" 25 #include "string_piece.h" 26 #include "symtab.h" 27 28 using namespace std; 29 30 class Value; 31 32 class Rule { 33 public: 34 Rule(); 35 36 Loc cmd_loc() const { return Loc(loc.filename, cmd_lineno); } 37 38 string DebugString() const; 39 40 vector<Symbol> outputs; 41 vector<Symbol> inputs; 42 vector<Symbol> order_only_inputs; 43 vector<Symbol> output_patterns; 44 bool is_double_colon; 45 bool is_suffix_rule; 46 vector<Value*> cmds; 47 Loc loc; 48 int cmd_lineno; 49 50 private: 51 void Error(const string& msg) { 52 ERROR_LOC(loc, "%s", msg.c_str()); 53 } 54 }; 55 56 struct RuleVarAssignment { 57 vector<Symbol> outputs; 58 StringPiece lhs; 59 StringPiece rhs; 60 AssignOp op; 61 }; 62 63 // If |rule| is not NULL, |rule_var| is filled. If the expression 64 // after the terminator |term| is needed (this happens only when 65 // |term| is '='), |after_term_fn| will be called to obtain the right 66 // hand side. 67 void ParseRule(Loc& loc, StringPiece line, char term, 68 const function<string()> &after_term_fn, 69 Rule** rule, RuleVarAssignment* rule_var); 70 71 #endif // RULE_H_ 72
