mirror of https://github.com/rust-lang/rust
106 lines
4.3 KiB
Rust
106 lines
4.3 KiB
Rust
// Checks that applied type arguments of enums, and aliases to them, are respected.
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// For example, `Self` is never a type constructor. Therefore, no types can be applied to it.
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//
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// We also check that the variant to an type-aliased enum cannot be type applied whether
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// that alias is generic or monomorphic.
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enum Enum<T> { TSVariant(T), SVariant { v: T }, UVariant }
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type Alias<T> = Enum<T>;
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type AliasFixed = Enum<()>;
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impl<T> Enum<T> {
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fn ts_variant() {
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Self::TSVariant(());
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//~^ ERROR mismatched types [E0308]
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Self::TSVariant::<()>(());
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//~^ ERROR type arguments are not allowed on this type [E0109]
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Self::<()>::TSVariant(());
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//~^ ERROR type arguments are not allowed on self type [E0109]
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//~| ERROR mismatched types [E0308]
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Self::<()>::TSVariant::<()>(());
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//~^ ERROR type arguments are not allowed on self type [E0109]
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//~| ERROR type arguments are not allowed on this type [E0109]
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}
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fn s_variant() {
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Self::SVariant { v: () };
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//~^ ERROR mismatched types [E0308]
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Self::SVariant::<()> { v: () };
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//~^ ERROR type arguments are not allowed on this type [E0109]
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//~| ERROR mismatched types [E0308]
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Self::<()>::SVariant { v: () };
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//~^ ERROR type arguments are not allowed on self type [E0109]
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//~| ERROR mismatched types [E0308]
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Self::<()>::SVariant::<()> { v: () };
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//~^ ERROR type arguments are not allowed on self type [E0109]
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//~| ERROR type arguments are not allowed on this type [E0109]
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//~| ERROR mismatched types [E0308]
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}
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fn u_variant() {
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Self::UVariant::<()>;
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//~^ ERROR type arguments are not allowed on this type [E0109]
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Self::<()>::UVariant;
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//~^ ERROR type arguments are not allowed on self type [E0109]
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Self::<()>::UVariant::<()>;
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//~^ ERROR type arguments are not allowed on self type [E0109]
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//~| ERROR type arguments are not allowed on this type [E0109]
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}
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}
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fn main() {
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// Tuple struct variant
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Enum::<()>::TSVariant::<()>(());
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//~^ ERROR type arguments are not allowed on tuple variant `TSVariant` [E0109]
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Alias::TSVariant::<()>(());
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//~^ ERROR type arguments are not allowed on this type [E0109]
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Alias::<()>::TSVariant::<()>(());
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//~^ ERROR type arguments are not allowed on this type [E0109]
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AliasFixed::TSVariant::<()>(());
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//~^ ERROR type arguments are not allowed on this type [E0109]
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AliasFixed::<()>::TSVariant(());
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//~^ ERROR type alias takes 0 generic arguments but 1 generic argument was supplied [E0107]
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AliasFixed::<()>::TSVariant::<()>(());
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//~^ ERROR type arguments are not allowed on this type [E0109]
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//~| ERROR type alias takes 0 generic arguments but 1 generic argument was supplied [E0107]
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// Struct variant
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Enum::<()>::SVariant::<()> { v: () };
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//~^ ERROR type arguments are not allowed on variant `SVariant` [E0109]
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Alias::SVariant::<()> { v: () };
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//~^ ERROR type arguments are not allowed on this type [E0109]
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Alias::<()>::SVariant::<()> { v: () };
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//~^ ERROR type arguments are not allowed on this type [E0109]
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AliasFixed::SVariant::<()> { v: () };
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//~^ ERROR type arguments are not allowed on this type [E0109]
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AliasFixed::<()>::SVariant { v: () };
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//~^ ERROR type alias takes 0 generic arguments but 1 generic argument was supplied [E0107]
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AliasFixed::<()>::SVariant::<()> { v: () };
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//~^ ERROR type arguments are not allowed on this type [E0109]
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//~| ERROR type alias takes 0 generic arguments but 1 generic argument was supplied [E0107]
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// Unit variant
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Enum::<()>::UVariant::<()>;
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//~^ ERROR type arguments are not allowed on unit variant `UVariant` [E0109]
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Alias::UVariant::<()>;
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//~^ ERROR type arguments are not allowed on this type [E0109]
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Alias::<()>::UVariant::<()>;
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//~^ ERROR type arguments are not allowed on this type [E0109]
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AliasFixed::UVariant::<()>;
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//~^ ERROR type arguments are not allowed on this type [E0109]
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AliasFixed::<()>::UVariant;
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//~^ ERROR type alias takes 0 generic arguments but 1 generic argument was supplied [E0107]
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AliasFixed::<()>::UVariant::<()>;
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//~^ ERROR type arguments are not allowed on this type [E0109]
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//~| ERROR type alias takes 0 generic arguments but 1 generic argument was supplied [E0107]
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}
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