Add --color_warnings to make warnings/errors like clang

This adds new (WARN|KATI_WARN|ERROR)_LOC log macro variants that take a
location as the first argument, and will prefix that location
information to the warning/error lines.

When --color_warnings is enabled, it reformats them to have a standard
warning:/error: infix, and adds colors in order to match the
warnings/errors produced by clang.

1 files changed, 1 insertions, 1 deletions

diff --git a/eval.cc b/eval.cc
index 4b56f1f..7a08be7 100644
--- a/eval.cc
+++ b/eval.cc
@@ -383,7 +383,7 @@ string Evaluator::GetShellAndFlag() {
 }
 
 void Evaluator::Error(const string& msg) {
-  ERROR("%s:%d: %s", LOCF(loc_), msg.c_str());
+  ERROR_LOC(loc_, "%s", msg.c_str());
 }
 
 unordered_set<Symbol> Evaluator::used_undefined_vars_;