Incorrect type highlight in presence of macros

[codebrainz]

Description

In C/C++ filetype, if you add some macros into a type definition (ex. struct, enum, etc), the last token before the opening brace of the definition seems to be taken as the type name. I guess this is a bug in old c.c ctags parser.

Example

#define BLEH
struct foo BLEH { int _; };

Here, BLEH gets highlighted as the type name instead of foo.

Use case

Using macros for things like GNU C's __attribute__ extension.

Version

I don't think version matters at all, but I'm using a fairly recent 1.32 build.

[b4n]

Tricky preprocessor :) The thing is that it would be perfectly valid to have struct BLEH foo in your example, esp. as it expands to nothing. Meh.
Maybe you could try current Universal-CTags that has a totally new C and C++ parser, it would be interesting to see what the stock behavior is here (it might be better or worse I guess).

A workaround is to use ignore.tags and list your macros there. E.g. mine contains a lot of GLib's macros and a few others:

G_GNUC_DEPRECATED_FOR+
G_GNUC_PRINTF+
G_GNUC_SCANF+
G_GNUC_FORMAT+
G_GNUC_*
G_DEPRECATED
G_DEPRECATED_FOR+
G_UNAVAILABLE+
G_DEFINE_TYPE+
G_DEFINE_TYPE_EXTENDED+
G_DEFINE_TYPE_WITH_CODE+
G_DEFINE_BOXED_TYPE+
GLIB_AVAILABLE_*
GIO_AVAILABLE_*
GDK_AVAILABLE_*
GTK_AVAILABLE_*
GLIB_DEPRECATED_IN_2_50_FOR+
GLIB_DEPRECATED_IN_2_48_FOR+
GLIB_DEPRECATED_IN_2_46_FOR+
GLIB_DEPRECATED_IN_2_44_FOR+
GLIB_DEPRECATED_IN_2_42_FOR+
GLIB_DEPRECATED_IN_2_40_FOR+
GLIB_DEPRECATED_IN_2_38_FOR+
GLIB_DEPRECATED_IN_2_36_FOR+
GLIB_DEPRECATED_IN_2_34_FOR+
GLIB_DEPRECATED_IN_2_32_FOR+
GLIB_DEPRECATED_IN_2_30_FOR+
GLIB_DEPRECATED_IN_2_28_FOR+
GLIB_DEPRECATED_IN_2_26_FOR+
GLIB_DEPRECATED_IN_*
GLIB_EXTERN
GLIB_VAR
__STL_NOTHROW
__THROW
GIT_EXTERN=extern
cairo_public
GEANY_DEPRECATED
GEANY_PRIVATE_FIELD
GEANY_DEPRECATED_FOR+

[masatake]

I'm working this topic in u-ctags side.

With the change I proposed in universal-ctags/ctags#2543, ctags can capture foo well:

$ cat /tmp/foo.c
#define BLEH
struct foo BLEH { int _; };
$ u-ctags --param-CPreProcessor:_expand=1 --fields-C=+{macrodef} --fields=+S -o - /tmp/foo.c
<sor:_expand=1 --fields-C=+{macrodef} --fields=+S -o - /tmp/foo.c
BLEH	/tmp/foo.c	/^#define BLEH$/;"	d	language:C	file:	macrodef:
_	/tmp/foo.c	/^struct foo BLEH { int _; };$/;"	m	language:C	struct:foo	typeref:typename:int	file:
foo	/tmp/foo.c	/^struct foo BLEH { int _; };$/;"	s	language:C	file: