[C++] The first commit for C++ version
16 tests out of 169 are passing.
diff --git a/ast.cc b/ast.cc
new file mode 100644
index 0000000..fdd4588
--- /dev/null
+++ b/ast.cc
@@ -0,0 +1,67 @@
+#include "ast.h"
+
+#include "eval.h"
+#include "stringprintf.h"
+#include "value.h"
+
+AST::AST() {}
+
+AST::~AST() {}
+
+string RuleAST::DebugString() const {
+ return StringPrintf("RuleAST(expr=%s term=%d after_term=%s)",
+ expr->DebugString().c_str(),
+ term,
+ after_term->DebugString().c_str());
+}
+
+string AssignAST::DebugString() const {
+ const char* opstr = "???";
+ switch (op) {
+ case AssignOp::EQ: opstr = "EQ"; break;
+ case AssignOp::COLON_EQ: opstr = "COLON_EQ"; break;
+ case AssignOp::PLUS_EQ: opstr = "PLUS_EQ"; break;
+ case AssignOp::QUESTION_EQ: opstr = "QUESTION_EQ"; break;
+ }
+ const char* dirstr = "???";
+ switch (directive) {
+ case AssignDirective::NONE: dirstr = ""; break;
+ case AssignDirective::OVERRIDE: dirstr = "override"; break;
+ case AssignDirective::EXPORT: dirstr = "export"; break;
+ }
+ return StringPrintf("AssignAST(lhs=%s rhs=%s opstr=%s dir=%s)",
+ lhs->DebugString().c_str(),
+ rhs->DebugString().c_str(),
+ opstr, dirstr);
+}
+
+string CommandAST::DebugString() const {
+ return StringPrintf("CommandAST(%s)",
+ expr->DebugString().c_str());
+}
+
+RuleAST::~RuleAST() {
+ delete expr;
+ delete after_term;
+}
+
+void RuleAST::Eval(Evaluator* ev) const {
+ ev->EvalRule(this);
+}
+
+AssignAST::~AssignAST() {
+ delete lhs;
+ delete rhs;
+}
+
+void AssignAST::Eval(Evaluator* ev) const {
+ ev->EvalAssign(this);
+}
+
+CommandAST::~CommandAST() {
+ delete expr;
+}
+
+void CommandAST::Eval(Evaluator* ev) const {
+ ev->EvalCommand(this);
+}