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diagnostics: fix the order of multiple declarations reports

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On

  %token FOO "foo"
  %printer {} "foo"
  %printer {} FOO

we report

  /tmp/foo.yy:2.10-11: error: %printer redeclaration for FOO
   %printer {} "foo"
            ^^
  /tmp/foo.yy:3.10-11:     previous declaration
   %printer {} FOO
            ^^

* src/symtab.c (locations_sort): New.
Use it.
* tests/input.at (Invalid Aliases): Stress the order of diagnostics.
This commit is contained in:
Akim Demaille
2013-12-09 15:26:52 +01:00
parent 26eb4f0bdc
commit 461f1516f8
3 changed files with 136 additions and 32 deletions
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21
NEWS
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@@ -2,6 +2,27 @@ GNU Bison NEWS
* Noteworthy changes in release ?.? (????-??-??) [?]
** Bug fixes
*** Redeclarations are reported in proper order
On
%token FOO "foo"
%printer {} "foo"
%printer {} FOO
bison used to report:
/tmp/foo.yy:2.10-11: error: %printer redeclaration for FOO
%printer {} "foo"
^^
/tmp/foo.yy:3.10-11: previous declaration
%printer {} FOO
^^
Now, the "previous" declaration is always the first one.
* Noteworthy changes in release 3.0.2 (2013-12-05) [stable]