[gcc r13-2805] attribs: Improve diagnostics

[Jakub Jelinek]

https://gcc.gnu.org/g:2ec6489d7a595c78cae4584244afd4ca91d6c8ff

commit r13-2805-g2ec6489d7a595c78cae4584244afd4ca91d6c8ff
Author: Jakub Jelinek <jakub@redhat.com>
Date:   Fri Sep 23 09:10:16 2022 +0200

    attribs: Improve diagnostics
    
    When looking at the attribs code, I've noticed weird diagnostics
    like
    int a __attribute__((section ("foo", "bar")));
    a.c:1:1: error: wrong number of arguments specified for ‘section’ attribute
        1 | int a __attribute__((section ("foo", "bar")));
          | ^~~
    a.c:1:1: note: expected between 1 and 1, found 2
    As roughly 50% of attributes that accept any arguments have
    spec->min_length == spec->max_length, I think it is worth it to have
    separate wording for such common case and just write simpler
    a.c:1:1: note: expected 1, found 2
    
    2022-09-23  Jakub Jelinek  <jakub@redhat.com>
    
            * attribs.cc (decl_attributes): Improve diagnostics, instead of
            saying expected between 1 and 1, found 2 just say expected 1, found 2.

Diff:
---
 gcc/attribs.cc | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/gcc/attribs.cc b/gcc/attribs.cc
index fb89616ff29..b1f103222aa 100644
--- a/gcc/attribs.cc
+++ b/gcc/attribs.cc
@@ -737,6 +737,9 @@ decl_attributes (tree *node, tree attributes, int flags,
 	      if (spec->max_length < 0)
 		inform (input_location, "expected %i or more, found %i",
 			spec->min_length, nargs);
+	      else if (spec->min_length == spec->max_length)
+		inform (input_location, "expected %i, found %i",
+			spec->min_length, nargs);
 	      else
 		inform (input_location, "expected between %i and %i, found %i",
 			spec->min_length, spec->max_length, nargs);