Use std namespace.

I had to rename distance() (in coord.h) to distance2() because it conflicts
with the STL function to compare 2 iterators. Not a bad change given how it
returns the square of the distance anyway.
I also had to rename the message global variable (in message.cc) to buffer.

I tried to fix and improve the coding style has much as I could, but I
probably missed a few given how huge and tedious it is.

I also didn't touch crawl-gdb.py, and the stuff in prebuilt, rltiles/tool
and util/levcomp.*, because I have no clue about those.

1 files changed, 4 insertions, 4 deletions

diff --git a/crawl-ref/source/errors.h b/crawl-ref/source/errors.h
index 529a0e0349..b12e86db09 100644
--- a/crawl-ref/source/errors.h
+++ b/crawl-ref/source/errors.h
@@ -5,18 +5,18 @@ NORETURN void fail(PRINTF(0, ));
 NORETURN void sysfail(PRINTF(0, ));
 NORETURN void corrupted(PRINTF(0, ));
 
-class ext_fail_exception : public std::exception
+class ext_fail_exception : public exception
 {
 public:
-    ext_fail_exception(const std::string &_msg) : msg(_msg) {}
+    ext_fail_exception(const string &_msg) : msg(_msg) {}
     ~ext_fail_exception() throw() {}
-    const std::string msg;
+    const string msg;
 };
 
 class corrupted_save : public ext_fail_exception
 {
 public:
-    corrupted_save(const std::string &_msg) : ext_fail_exception(_msg) {}
+    corrupted_save(const string &_msg) : ext_fail_exception(_msg) {}
 };
 
 extern bool CrawlIsCrashing;