Thread language through c_type_print_args

Currently dwarf2read.c will pass the CU's language to
c_type_print_args -- but this doesn't affect all aspects of type
printing, because some code in c-typeprint.c refers to
current_language.

This patch threads the language through more of the type printing
code, adding an overload to c_type_print.  Some uses of
current_language remain, but now they are only in top-level functions.

gdb/ChangeLog
2018-06-01  Tom Tromey  <tom@tromey.com>

	* dwarf2read.c (dwarf2_compute_name): Pass CU's language to
	c_print_type.
	* c-typeprint.c (c_print_type_1): Add "language" parameter.
	(c_print_type): Update.
	(c_print_type): New overload.
	(c_type_print_varspec_prefix, c_type_print_args)
	(c_type_print_varspec_suffix, c_print_type_no_offsets)
	(c_type_print_base_struct_union, c_type_print_base_1)
	(cp_type_print_method_args): Add "language" parameter.
	(c_type_print_base): Update.
	* c-lang.h (c_print_type): Add new overload.

1 files changed, 7 insertions, 0 deletions

diff --git a/gdb/c-lang.h b/gdb/c-lang.h
index 18dedcc..a250fb3 100644
--- a/gdb/c-lang.h
+++ b/gdb/c-lang.h
@@ -72,6 +72,13 @@ extern void c_print_type (struct type *, const char *,
 			  struct ui_file *, int, int,
 			  const struct type_print_options *);
 
+/* Print a type but allow the precise language to be specified.  */
+
+extern void c_print_type (struct type *, const char *,
+			  struct ui_file *, int, int,
+			  enum language,
+			  const struct type_print_options *);
+
 extern void c_print_typedef (struct type *,
 			     struct symbol *,
 			     struct ui_file *);