1 files changed, 152 insertions, 0 deletions
diff --git a/stmt.h b/stmt.h
new file mode 100644
index 0000000..4d4c5eb
--- /dev/null
+++ b/stmt.h
@@ -0,0 +1,152 @@
+// 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_