* [Ada] Add Default_Initial_Condition to type Unbounded_String
@ 2021-10-05 8:26 Pierre-Marie de Rodat
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From: Pierre-Marie de Rodat @ 2021-10-05 8:26 UTC (permalink / raw)
To: gcc-patches; +Cc: Joffrey Huguet
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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.
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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;
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