Merge #466

466: Expose rust debug and use it r=tschwinge a=CohenArthur

Fixes #464 

@philberty I've checked and rust_debug does output on stderr correctly :)

This PR exposes the rust_debug prototype and replaces debug printfs (`fprintf (stderr, ...)`) with calls to rust_debug. This also removes the extra newlines that were added at the end of the fprintf format strings, since calling rust_debug already adds one. Without this, the tests fail due to blank lines in the output.

I have used a template to overload the rust_debug function and pass variadic arguments to the complete version. While the code looks cleaner than using `va_args`, it's also heavier C++. I'm open to changing it and definitely not attached to this implementation.

Most of the PR was made using sed and then clang-format

Co-authored-by: CohenArthur <arthur.cohen@epita.fr>

1 files changed, 2 insertions, 1 deletions

diff --git a/gcc/rust/rust-lang.cc b/gcc/rust/rust-lang.cc
index a6fd48a..4b139ef 100644
--- a/gcc/rust/rust-lang.cc
+++ b/gcc/rust/rust-lang.cc
@@ -31,6 +31,7 @@
 #include "convert.h"
 #include "langhooks.h"
 #include "langhooks-def.h"
+#include "rust-diagnostics.h"
 
 #include <mpfr.h>
 // note: header files must be in this order or else forward declarations don't
@@ -165,7 +166,7 @@ grs_langhook_init_options_struct (struct gcc_options * /* opts */)
 static void
 grs_langhook_parse_file (void)
 {
-  fprintf (stderr, "Preparing to parse files. \n");
+  rust_debug ("Preparing to parse files. ");
 
   session.parse_files (num_in_fnames, in_fnames);
 }