[src/trunk]: src/usr.bin/xlint/lint1 lint: document which keywords are availa...

[rillig <rillig%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/28a2071bcca4
branches:  trunk
changeset: 377497:28a2071bcca4
user:      rillig <rillig%NetBSD.org@localhost>
date:      Fri Jul 14 09:32:42 2023 +0000

description:
lint: document which keywords are available in which language levels

diffstat:

 usr.bin/xlint/lint1/lex.c |  11 +++++++++--
 1 files changed, 9 insertions(+), 2 deletions(-)

diffs (62 lines):

diff -r 2673f774c761 -r 28a2071bcca4 usr.bin/xlint/lint1/lex.c
--- a/usr.bin/xlint/lint1/lex.c Fri Jul 14 09:20:23 2023 +0000
+++ b/usr.bin/xlint/lint1/lex.c Fri Jul 14 09:32:42 2023 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: lex.c,v 1.185 2023/07/13 23:11:11 rillig Exp $ */
+/* $NetBSD: lex.c,v 1.186 2023/07/14 09:32:42 rillig Exp $ */
 
 /*
  * Copyright (c) 1996 Christopher G. Demetriou.  All Rights Reserved.
@@ -38,7 +38,7 @@
 
 #include <sys/cdefs.h>
 #if defined(__RCSID)
-__RCSID("$NetBSD: lex.c,v 1.185 2023/07/13 23:11:11 rillig Exp $");
+__RCSID("$NetBSD: lex.c,v 1.186 2023/07/14 09:32:42 rillig Exp $");
 #endif
 
 #include <ctype.h>
@@ -119,8 +119,11 @@ static const struct keyword {
        bool    kw_leading:1;   /* '__name' */
        bool    kw_both:1;      /* '__name__' */
 } keywords[] = {
+       // TODO: _Alignas is not available in C99.
        kwdef_keyword(  "_Alignas",     T_ALIGNAS),
+       // TODO: _Alignof is not available in C99.
        kwdef_keyword(  "_Alignof",     T_ALIGNOF),
+       // TODO: alignof is not available in C99.
        kwdef_token(    "alignof",      T_ALIGNOF,              78,0,6),
        kwdef_token(    "asm",          T_ASM,                  78,1,7),
        kwdef_token(    "_Atomic",      T_ATOMIC,               11,0,1),
@@ -138,6 +141,7 @@ static const struct keyword {
        kwdef_keyword(  "do",           T_DO),
        kwdef_type(     "double",       DOUBLE,                 78),
        kwdef_keyword(  "else",         T_ELSE),
+       // XXX: enum is not available in traditional C.
        kwdef_keyword(  "enum",         T_ENUM),
        kwdef_token(    "__extension__",T_EXTENSION,            78,1,1),
        kwdef_sclass(   "extern",       EXTERN,                 78,0,1),
@@ -154,6 +158,7 @@ static const struct keyword {
 #endif
        kwdef_type(     "long",         LONG,                   78),
        kwdef("_Noreturn", T_FUNCTION_SPECIFIER, .u.kw_fs = FS_NORETURN, 11,0,1),
+       // XXX: __packed is GCC-specific.
        kwdef_token(    "__packed",     T_PACKED,               78,0,1),
        kwdef_token(    "__real__",     T_REAL,                 78,1,1),
        kwdef_sclass(   "register",     REG,                    78,0,1),
@@ -163,6 +168,7 @@ static const struct keyword {
        kwdef(          "signed", T_TYPE, .u.kw_tspec = SIGNED, 90,0,3),
        kwdef_keyword(  "sizeof",       T_SIZEOF),
        kwdef_sclass(   "static",       STATIC,                 78,0,1),
+       // XXX: _Static_assert was added in C11.
        kwdef_keyword(  "_Static_assert",       T_STATIC_ASSERT),
        kwdef("struct", T_STRUCT_OR_UNION, .u.kw_tspec = STRUCT, 78,0,1),
        kwdef_keyword(  "switch",       T_SWITCH),
@@ -177,6 +183,7 @@ static const struct keyword {
 #endif
        kwdef("union",  T_STRUCT_OR_UNION, .u.kw_tspec = UNION, 78,0,1),
        kwdef_type(     "unsigned",     UNSIGN,                 78),
+       // XXX: void is not available in traditional C.
        kwdef_type(     "void",         VOID,                   78),
        kwdef_tqual(    "volatile",     tq_volatile,            90,0,7),
        kwdef_keyword(  "while",        T_WHILE),