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Diffstat (limited to '')
-rw-r--r-- | src/test/ui/associated-types/associated-types-projection-from-known-type-in-impl.rs | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/src/test/ui/associated-types/associated-types-projection-from-known-type-in-impl.rs b/src/test/ui/associated-types/associated-types-projection-from-known-type-in-impl.rs new file mode 100644 index 000000000..a59c327be --- /dev/null +++ b/src/test/ui/associated-types/associated-types-projection-from-known-type-in-impl.rs @@ -0,0 +1,38 @@ +// run-pass +// Test where the impl self type uses a projection from a constant type. + + +trait Int +{ + type T; + + fn dummy(&self) { } +} + +trait NonZero +{ + fn non_zero(self) -> bool; +} + +impl Int for i32 { type T = i32; } +impl Int for i64 { type T = i64; } +impl Int for u32 { type T = u32; } +impl Int for u64 { type T = u64; } + +impl NonZero for <i32 as Int>::T { fn non_zero(self) -> bool { self != 0 } } +impl NonZero for <i64 as Int>::T { fn non_zero(self) -> bool { self != 0 } } +impl NonZero for <u32 as Int>::T { fn non_zero(self) -> bool { self != 0 } } +impl NonZero for <u64 as Int>::T { fn non_zero(self) -> bool { self != 0 } } + +fn main () +{ + assert!(NonZero::non_zero(22_i32)); + assert!(NonZero::non_zero(22_i64)); + assert!(NonZero::non_zero(22_u32)); + assert!(NonZero::non_zero(22_u64)); + + assert!(!NonZero::non_zero(0_i32)); + assert!(!NonZero::non_zero(0_i64)); + assert!(!NonZero::non_zero(0_u32)); + assert!(!NonZero::non_zero(0_u64)); +} |