[C++] The first commit for C++ version

16 tests out of 169 are passing.

1 files changed, 62 insertions, 0 deletions

diff --git a/eval.h b/eval.h
new file mode 100644
index 0000000..78cc307
--- /dev/null
+++ b/eval.h
@@ -0,0 +1,62 @@
+#ifndef EVAL_H_
+#define EVAL_H_
+
+#include <unordered_map>
+#include <vector>
+
+#include "loc.h"
+#include "string_piece.h"
+
+using namespace std;
+
+class AssignAST;
+class CommandAST;
+class Makefile;
+class Rule;
+class RuleAST;
+class Var;
+class Vars;
+
+struct EvalResult {
+  ~EvalResult();
+  vector<Rule*> rules;
+  Vars* vars;
+  unordered_map<StringPiece, Vars*> rule_vars;
+  // TODO: read_mks
+  unordered_map<StringPiece, bool> exports;
+};
+
+class Evaluator {
+ public:
+  Evaluator(const Vars* vars);
+  ~Evaluator();
+
+  void EvalAssign(const AssignAST* ast);
+  void EvalRule(const RuleAST* ast);
+  void EvalCommand(const CommandAST* ast);
+
+  Var* LookupVar(StringPiece name);
+  // For target specific variables.
+  Var* LookupVarInCurrentScope(StringPiece name);
+
+  EvalResult* GetEvalResult();
+
+#if 0
+  const vector<Rule*>& rules() const { return rules_; }
+  const Vars* vars() const { return vars_; }
+  const unordered_map<StringPiece, Vars*>& rule_vars() const {
+    return rule_vars_;
+  }
+#endif
+
+ private:
+  const Vars* in_vars_;
+  Vars* vars_;
+  unordered_map<StringPiece, Vars*> rule_vars_;
+  vector<Rule*> rules_;
+  Rule* last_rule_;
+
+  Loc loc_;
+};
+
+#endif  // EVAL_H_