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| author | Bob Duff <duff@adacore.com> | 2018-05-23 10:23:19 +0000 |
|---|---|---|
| committer | Pierre-Marie de Rodat <pmderodat@gcc.gnu.org> | 2018-05-23 10:23:19 +0000 |
| commit | aeaa0347e94b1dfa040809b3b098fcc0474d45f7 (patch) | |
| tree | 0532e5d5338427fb6e8ad3a6e2de1b5ae80c5807 /gcc/ada/libgnat | |
| parent | 5e1c231ec79d0a772c24cb299f88d10ba076e9f2 (diff) | |
| download | gcc-aeaa0347e94b1dfa040809b3b098fcc0474d45f7.zip gcc-aeaa0347e94b1dfa040809b3b098fcc0474d45f7.tar.gz gcc-aeaa0347e94b1dfa040809b3b098fcc0474d45f7.tar.bz2 | |
[Ada] Vectors: spurious error in -gnatwE mode
This patch fixes a bug in which if Ada.Containers.Vectors is instantiated with
an Index_Type such that Index_Type'Base'Last is less than Count_Type'Last, and
the -gnatwE switch is used, the compiler gives spurious error messages.
The following test should compile quietly with -gnatwE:
gnatmake short_vectors.ads -gnatwa -gnatwE -gnatf
with Ada.Containers.Vectors;
package Short_Vectors is
type Index_Type is range 1 .. 256;
package Map_Pkg is new Ada.Containers.Vectors
(Index_Type => Index_Type,
Element_Type => Integer);
end Short_Vectors;
2018-05-23 Bob Duff <duff@adacore.com>
gcc/ada/
* libgnat/a-convec.adb: (Insert, Insert_Space): Suppress warnings. The
code in question is not reachable in the case where Count_Type'Last is
out of range.
From-SVN: r260590
Diffstat (limited to 'gcc/ada/libgnat')
| -rw-r--r-- | gcc/ada/libgnat/a-convec.adb | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/gcc/ada/libgnat/a-convec.adb b/gcc/ada/libgnat/a-convec.adb index 285d3f5..b098860 100644 --- a/gcc/ada/libgnat/a-convec.adb +++ b/gcc/ada/libgnat/a-convec.adb @@ -999,9 +999,12 @@ package body Ada.Containers.Vectors is -- We know that No_Index (the same as Index_Type'First - 1) is -- less than 0, so it is safe to compute the following sum without - -- fear of overflow. + -- fear of overflow. We need to suppress warnings, because + -- otherwise we get an error in -gnatwE mode. + pragma Warnings (Off); Index := No_Index + Index_Type'Base (Count_Type'Last); + pragma Warnings (On); if Index <= Index_Type'Last then @@ -1657,9 +1660,12 @@ package body Ada.Containers.Vectors is -- We know that No_Index (the same as Index_Type'First - 1) is -- less than 0, so it is safe to compute the following sum without - -- fear of overflow. + -- fear of overflow. We need to suppress warnings, because + -- otherwise we get an error in -gnatwE mode. + pragma Warnings (Off); Index := No_Index + Index_Type'Base (Count_Type'Last); + pragma Warnings (On); if Index <= Index_Type'Last then |