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From: Pierre-Marie de Rodat <derodat@adacore.com>
To: gcc-patches@gcc.gnu.org
Cc: Joffrey Huguet <huguet@adacore.com>
Subject: [Ada] Add Default_Initial_Condition to type Unbounded_String
Date: Tue, 5 Oct 2021 08:26:36 +0000	[thread overview]
Message-ID: <20211005082636.GA2693574@adacore.com> (raw)

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SPARK emitted spurious checks on Unbounded_String variables that were
not initialized. This patch adds a default initial condition to the type
Unbounded_String so that they disappear.

Tested on x86_64-pc-linux-gnu, committed on trunk

gcc/ada/

	* libgnat/a-strunb.ads, libgnat/a-strunb__shared.ads: Add
	Default_Initial_Condition to Unbounded_String.

[-- Attachment #2: patch.diff --]
[-- Type: text/x-diff, Size: 1016 bytes --]

diff --git a/gcc/ada/libgnat/a-strunb.ads b/gcc/ada/libgnat/a-strunb.ads
--- a/gcc/ada/libgnat/a-strunb.ads
+++ b/gcc/ada/libgnat/a-strunb.ads
@@ -58,7 +58,8 @@ package Ada.Strings.Unbounded with
 is
    pragma Preelaborate;
 
-   type Unbounded_String is private;
+   type Unbounded_String is private with
+     Default_Initial_Condition => Length (Unbounded_String) = 0;
    pragma Preelaborable_Initialization (Unbounded_String);
 
    Null_Unbounded_String : constant Unbounded_String;


diff --git a/gcc/ada/libgnat/a-strunb__shared.ads b/gcc/ada/libgnat/a-strunb__shared.ads
--- a/gcc/ada/libgnat/a-strunb__shared.ads
+++ b/gcc/ada/libgnat/a-strunb__shared.ads
@@ -85,7 +85,8 @@ package Ada.Strings.Unbounded with
 is
    pragma Preelaborate;
 
-   type Unbounded_String is private;
+   type Unbounded_String is private with
+     Default_Initial_Condition => Length (Unbounded_String) = 0;
    pragma Preelaborable_Initialization (Unbounded_String);
 
    Null_Unbounded_String : constant Unbounded_String;



                 reply	other threads:[~2021-10-05  8:26 UTC|newest]

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