gccrs: Experiment with adding an error code to an error

gcc/rust/ChangeLog:

	* rust-diagnostics.cc (rust_error_at): New overload.
	* rust-diagnostics.h (struct ErrorCode): New struct.
	(rust_error_at): New.
	(rust_be_error_at): Likewise.
	* rust-gcc-diagnostics.cc (class rust_error_code_rule): New class.
	(rust_be_error_at): New function.
	* typecheck/rust-casts.cc (TypeCastRules::emit_cast_error): Emit E0054
	when reporting invalid cast error.

gcc/testsuite/ChangeLog:

	* rust/compile/bad_as_bool_char.rs: Add error code to testcase.

Signed-off-by: David Malcolm <dmalcolm@redhat.com>

1 files changed, 11 insertions, 0 deletions

diff --git a/gcc/rust/rust-diagnostics.cc b/gcc/rust/rust-diagnostics.cc
index 4e5c2ec..f29aec6 100644
--- a/gcc/rust/rust-diagnostics.cc
+++ b/gcc/rust/rust-diagnostics.cc
@@ -167,6 +167,17 @@ rust_error_at (const Location location, const char *fmt, ...)
 }
 
 void
+rust_error_at (const RichLocation &location, const ErrorCode code,
+	       const char *fmt, ...)
+{
+  va_list ap;
+
+  va_start (ap, fmt);
+  rust_be_error_at (location, code, expand_message (fmt, ap));
+  va_end (ap);
+}
+
+void
 rust_warning_at (const Location location, int opt, const char *fmt, ...)
 {
   va_list ap;