| // 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 STMT_H_ |
| #define STMT_H_ |
| |
| #include <string> |
| #include <vector> |
| |
| #include "loc.h" |
| #include "string_piece.h" |
| |
| using namespace std; |
| |
| class Evaluator; |
| class Value; |
| |
| enum struct AssignOp { |
| EQ, |
| COLON_EQ, |
| PLUS_EQ, |
| QUESTION_EQ, |
| }; |
| |
| enum struct AssignDirective { |
| NONE = 0, |
| OVERRIDE = 1, |
| EXPORT = 2, |
| }; |
| |
| enum struct CondOp { |
| IFEQ, |
| IFNEQ, |
| IFDEF, |
| IFNDEF, |
| }; |
| |
| struct Stmt { |
| public: |
| virtual ~Stmt(); |
| |
| Loc loc() const { return loc_; } |
| void set_loc(Loc loc) { loc_ = loc; } |
| StringPiece orig() const { return orig_; } |
| |
| virtual void Eval(Evaluator* ev) const = 0; |
| |
| virtual string DebugString() const = 0; |
| |
| protected: |
| Stmt(); |
| |
| private: |
| Loc loc_; |
| StringPiece orig_; |
| }; |
| |
| struct RuleStmt : public Stmt { |
| Value* expr; |
| char term; |
| Value* after_term; |
| |
| virtual ~RuleStmt(); |
| |
| virtual void Eval(Evaluator* ev) const; |
| |
| virtual string DebugString() const; |
| }; |
| |
| struct AssignStmt : public Stmt { |
| Value* lhs; |
| Value* rhs; |
| StringPiece orig_rhs; |
| AssignOp op; |
| AssignDirective directive; |
| |
| virtual ~AssignStmt(); |
| |
| virtual void Eval(Evaluator* ev) const; |
| |
| virtual string DebugString() const; |
| }; |
| |
| struct CommandStmt : public Stmt { |
| Value* expr; |
| StringPiece orig; |
| |
| virtual ~CommandStmt(); |
| |
| virtual void Eval(Evaluator* ev) const; |
| |
| virtual string DebugString() const; |
| }; |
| |
| struct IfStmt : public Stmt { |
| CondOp op; |
| Value* lhs; |
| Value* rhs; |
| vector<Stmt*> true_stmts; |
| vector<Stmt*> false_stmts; |
| |
| virtual ~IfStmt(); |
| |
| virtual void Eval(Evaluator* ev) const; |
| |
| virtual string DebugString() const; |
| }; |
| |
| struct IncludeStmt : public Stmt { |
| Value* expr; |
| bool should_exist; |
| |
| virtual ~IncludeStmt(); |
| |
| virtual void Eval(Evaluator* ev) const; |
| |
| virtual string DebugString() const; |
| }; |
| |
| struct ExportStmt : public Stmt { |
| Value* expr; |
| bool is_export; |
| |
| virtual ~ExportStmt(); |
| |
| virtual void Eval(Evaluator* ev) const; |
| |
| virtual string DebugString() const; |
| }; |
| |
| struct ParseErrorStmt : public Stmt { |
| string msg; |
| |
| virtual ~ParseErrorStmt(); |
| |
| virtual void Eval(Evaluator* ev) const; |
| |
| virtual string DebugString() const; |
| }; |
| |
| #endif // STMT_H_ |