bug#72402: 28.2; Etags does not parse correctly Java source code

["Daniel Głowacki" <dglowacki4@gmail.com>]

Hello,

That's great news. Thank you very much for your support.

Eli Zaretskii <eliz@gnu.org> writes:

> [Please use Reply All to reply, to keep the bug tracker CC'ed.]
>
>> From: Daniel Głowacki <dglowacki4@gmail.com> Date: Fri, 02 Aug 2024
>> 18:29:05 +0200
>> 
>> Please take a look at the attachment.  These are two Java classes
>> from the same 'java.util' package and generated TAGS file.
>> 
>> ArrayList.java is parsed with 'class' keyword, however the
>> HashMap.java does not have it.
>> 
>> This is only one example. I don't know how it works with a new Java
>> keywords.
>
> Thanks.  The problem was that etags became confused by the comma
> inside Java class parameters, as in
>
>   public class HashMap<K,V> extends AbstractMap<K,V>
>
> I fixed that.  While at that, I saw that @SuppressWarnings is also not
> supported, and causes the qualified identifier to be skipped, so I
> fixed that as well.  The patch for both these improvements is below,
> in case you want to apply it locally; it is now installed on the
> master branch of the Emacs Git repository (which will eventually
> become Emacs 31).
>
> diff --git a/lib-src/etags.c b/lib-src/etags.c index edadbc2..4684ca8
> 100644 --- a/lib-src/etags.c +++ b/lib-src/etags.c @@ -2633,6 +2633,7
> @@ DEFUN, 0, st_C_gnumacro ENTRY, 0, st_C_gnumacro PSEUDO, 0,
> st_C_gnumacro ENUM_BF, 0, st_C_enum_bf +@SuppressWarnings, (C_JAVA &
> ~C_PLPL), st_C_attribute # These are defined inside C functions, so
> currently they are not met.  # EXFUN used in glibc, DEFVAR_* in emacs.
> #EXFUN, 0, st_C_gnumacro @@ -2644,44 +2645,44 @@ DEFUN, 0,
> st_C_gnumacro - make in_word_set static and not inline - remove any
> 'register' qualifications from variable decls. */ /*%<*/ -/* C code
> produced by gperf version 3.0.1 */ -/* Command-line: gperf -m 5 */ +/*
> ANSI-C code produced by gperf version 3.1 */ +/* Command-line: gperf
> -m 5 gperf.inp */ /* Computed positions: -k'2-3' */
>  
>  struct C_stab_entry { const char *name; int c_ext; enum sym_type
> type; }; -/* maximum key range = 34, duplicates = 0 */ +/* maximum key
> range = 36, duplicates = 0 */
>  
>  static int hash (const char *str, int len) { static char const
> asso_values[] = { - 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, - 36, 36,
> 36, 36, 36, 36, 36, 36, 36, 36, - 36, 36, 36, 36, 36, 36, 36, 36, 36,
> 36, - 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, - 36, 36, 36, 36, 36,
> 36, 36, 36, 36, 36, - 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, - 36,
> 36, 36, 36, 36, 36, 36, 36, 36, 3, - 27, 36, 36, 36, 36, 36, 36, 36,
> 26, 36, - 36, 36, 36, 25, 0, 0, 36, 36, 36, 0, - 36, 36, 36, 36, 36,
> 1, 36, 16, 36, 6, - 23, 0, 0, 36, 22, 0, 36, 36, 5, 0, - 0, 15, 1, 36,
> 6, 36, 8, 19, 36, 16, - 4, 5, 36, 36, 36, 36, 36, 36, 36, 36, - 36,
> 36, 36, 36, 36, 36, 36, 36, 36, 36, - 36, 36, 36, 36, 36, 36, 36, 36,
> 36, 36, - 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, - 36, 36, 36, 36,
> 36, 36, 36, 36, 36, 36, - 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, -
> 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, - 36, 36, 36, 36, 36, 36, 36,
> 36, 36, 36, - 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, - 36, 36, 36,
> 36, 36, 36, 36, 36, 36, 36, - 36, 36, 36, 36, 36, 36, 36, 36, 36, 36,
> - 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, - 36, 36, 36, 36, 36, 36,
> 36, 36, 36, 36, - 36, 36, 36, 36, 36, 36 + 38, 38, 38, 38, 38, 38, 38,
> 38, 38, 38, + 38, 38, 38, 38, 38, 38, 38, 38, 38, 38, + 38, 38, 38,
> 38, 38, 38, 38, 38, 38, 38, + 38, 38, 38, 38, 38, 38, 38, 38, 38, 38,
> + 38, 38, 38, 38, 38, 38, 38, 38, 38, 38, + 38, 38, 38, 38, 38, 38,
> 38, 38, 38, 38, + 38, 38, 38, 38, 38, 38, 38, 38, 38, 29, + 3, 38, 38,
> 38, 38, 38, 38, 38, 23, 38, + 38, 38, 38, 0, 5, 4, 38, 38, 38, 24, +
> 38, 38, 38, 38, 38, 1, 38, 16, 38, 6, + 23, 0, 0, 38, 22, 0, 38, 38,
> 5, 0, + 0, 15, 1, 38, 6, 38, 8, 19, 38, 16, + 4, 5, 38, 38, 38, 38,
> 38, 38, 38, 38, + 38, 38, 38, 38, 38, 38, 38, 38, 38, 38, + 38, 38,
> 38, 38, 38, 38, 38, 38, 38, 38, + 38, 38, 38, 38, 38, 38, 38, 38, 38,
> 38, + 38, 38, 38, 38, 38, 38, 38, 38, 38, 38, + 38, 38, 38, 38, 38,
> 38, 38, 38, 38, 38, + 38, 38, 38, 38, 38, 38, 38, 38, 38, 38, + 38,
> 38, 38, 38, 38, 38, 38, 38, 38, 38, + 38, 38, 38, 38, 38, 38, 38, 38,
> 38, 38, + 38, 38, 38, 38, 38, 38, 38, 38, 38, 38, + 38, 38, 38, 38,
> 38, 38, 38, 38, 38, 38, + 38, 38, 38, 38, 38, 38, 38, 38, 38, 38, +
> 38, 38, 38, 38, 38, 38, 38, 38, 38, 38, + 38, 38, 38, 38, 38, 38 };
> int hval = len;
>  
> @@ -2702,18 +2703,18 @@ in_word_set (const char *str, ptrdiff_t len) {
> enum { - TOTAL_KEYWORDS = 34, + TOTAL_KEYWORDS = 35, MIN_WORD_LENGTH =
> 2, - MAX_WORD_LENGTH = 15, + MAX_WORD_LENGTH = 17, MIN_HASH_VALUE = 2,
> - MAX_HASH_VALUE = 35 + MAX_HASH_VALUE = 37 };
>  
>    static struct C_stab_entry wordlist[] = { {""}, {""}, {"if", 0,
> st_C_ignore}, - {"GTY", 0, st_C_attribute}, + {""}, {"@end", 0,
> st_C_objend}, {"union", 0, st_C_struct}, {"define", 0, st_C_define},
> @@ -2741,10 +2742,12 @@ in_word_set (const char *str, ptrdiff_t len)
> {"undef", 0, st_C_define}, {"package", (C_JAVA & ~C_PLPL),
> st_C_ignore}, {"__attribute__", 0, st_C_attribute}, - {"ENTRY", 0,
> st_C_gnumacro}, {"SYSCALL", 0, st_C_gnumacro}, + {"GTY", 0,
> st_C_attribute}, + {"ENTRY", 0, st_C_gnumacro}, {"ENUM_BF", 0,
> st_C_enum_bf}, {"PSEUDO", 0, st_C_gnumacro}, + {"@SuppressWarnings",
> (C_JAVA & ~C_PLPL), st_C_attribute}, {"DEFUN", 0, st_C_gnumacro} };
>  
> @@ -3012,7 +3015,6 @@ consider_token (char *str, /* IN: token pointer
> */ static ptrdiff_t structbracelev; static enum sym_type toktype;
>  
> - toktype = C_symtype (str, len, *c_extp);
>  
>    /* @@ -4016,7 +4018,9 @@ C_entries (int c_ext, /* extension of C */
> default: fvdef = fvnone; } - if (structdef == stagseen) + if
> (structdef == stagseen + /* class Foo<K,V,T>...  */ + && !(cjava &&
> templatelev > 0)) structdef = snone; break; case ']':

-- 
Best regards,
Daniel Głowacki