commit b552df31a53738f72d273c1e6c43bf2e370c3597
author Shinichiro Hamaji <shinichiro.hamaji@gmail.com> Sat Dec 12 12:37:51 2015 +0900
committer Shinichiro Hamaji <shinichiro.hamaji@gmail.com> Sat Dec 12 12:38:50 2015 +0900
tree fc1ca490c253357bd1d438d3ab3db95e5b80124f
parent 29e45702687fc8f1f9925824adeddc36e69ae030

[C++] Fail early for unsupported automatic variables

This is for issue #40.

command.cc

diff --git a/command.cc b/command.cc
index 99984c2..6b8d604 100644
--- a/command.cc
+++ b/command.cc
@@ -70,6 +70,7 @@
 DECLARE_AUTO_VAR_CLASS(AutoHatVar);
 DECLARE_AUTO_VAR_CLASS(AutoPlusVar);
 DECLARE_AUTO_VAR_CLASS(AutoStarVar);
+DECLARE_AUTO_VAR_CLASS(AutoNotImplementedVar);
 
 class AutoSuffixDVar : public AutoVar {
  public:
@@ -128,6 +129,10 @@
   pat.Stem(n->output.str()).AppendToString(s);
 }
 
+void AutoNotImplementedVar::Eval(Evaluator*, string*) const {
+  ERROR("Automatic variable `$%s' isn't supported yet", sym_);
+}
+
 void AutoSuffixDVar::Eval(Evaluator* ev, string* s) const {
   string buf;
   wrapped_->Eval(ev, &buf);
@@ -177,6 +182,10 @@
   INSERT_AUTO_VAR(AutoHatVar, "^");
   INSERT_AUTO_VAR(AutoPlusVar, "+");
   INSERT_AUTO_VAR(AutoStarVar, "*");
+  // TODO: Implement them.
+  INSERT_AUTO_VAR(AutoNotImplementedVar, "%");
+  INSERT_AUTO_VAR(AutoNotImplementedVar, "?");
+  INSERT_AUTO_VAR(AutoNotImplementedVar, "|");
 }
 
 void CommandEvaluator::Eval(DepNode* n, vector<Command*>* commands) {