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std: Implement featureSetHasAny/featureSetHasAll 

Introduce two helper functions to avoid writing short novels only to check for more
than a single feature.
master
LemonBoy 2020-10-19 09:45:35 +02:00 committed by Veikka Tuominen
parent a123378141
commit 90f7034b69
2 changed files with 24 additions and 0 deletions
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19
lib/std/target.zig
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@ -637,9 +637,28 @@ pub const Target = struct {
return x;
}
/// Returns true if the specified feature is enabled.
pub fn featureSetHas(set: Set, feature: F) bool {
return set.isEnabled(@enumToInt(feature));
}
/// Returns true if any specified feature is enabled.
pub fn featureSetHasAny(set: Set, features: anytype) bool {
comptime std.debug.assert(std.meta.trait.isIndexable(@TypeOf(features)));
inline for (features) |feature| {
if (set.isEnabled(@enumToInt(@as(F, feature)))) return true;
}
return false;
}
/// Returns true if every specified feature is enabled.
pub fn featureSetHasAll(set: Set, features: anytype) bool {
comptime std.debug.assert(std.meta.trait.isIndexable(@TypeOf(features)));
inline for (features) |feature| {
if (!set.isEnabled(@enumToInt(@as(F, feature)))) return false;
}
return true;
}
};
}
};

5
lib/std/zig/cross_target.zig
View File

@ -827,6 +827,11 @@ test "CrossTarget.parse" {
std.testing.expect(Target.x86.featureSetHas(target.cpu.features, .cmov));
std.testing.expect(Target.x86.featureSetHas(target.cpu.features, .fxsr));
std.testing.expect(Target.x86.featureSetHasAny(target.cpu.features, .{ .sse, .avx, .cmov }));
std.testing.expect(!Target.x86.featureSetHasAny(target.cpu.features, .{ .sse, .avx }));
std.testing.expect(Target.x86.featureSetHasAll(target.cpu.features, .{ .mmx, .x87 }));
std.testing.expect(!Target.x86.featureSetHasAll(target.cpu.features, .{ .mmx, .x87, .sse }));
const text = try cross_target.zigTriple(std.testing.allocator);
defer std.testing.allocator.free(text);
std.testing.expectEqualSlices(u8, "x86_64-linux-gnu", text);