cairo-lang-semantic 2.20.0

Cairo semantic model.
Documentation 
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//! > Unknown types in trait/impl methods.

//! > test_runner_name
test_function_diagnostics(expect_diagnostics: true)

//! > function_code
fn foo() {}

//! > function_name
foo

//! > module_code
trait MyTrait {
    fn foo(x: u8, y: T, z: u8) -> u8;
    fn bar() -> T;
}

impl MyImpl of MyTrait {
    fn foo(x: T, y: u8, z: u16) -> T {}
    fn bar() -> u8 {
        0
    }
}

//! > expected_diagnostics
error[E0006]: Type not found.
 --> lib.cairo:2:22
    fn foo(x: u8, y: T, z: u8) -> u8;
                     ^

error[E0006]: Type not found.
 --> lib.cairo:3:17
    fn bar() -> T;
                ^

error[E0006]: Type not found.
 --> lib.cairo:7:15
    fn foo(x: T, y: u8, z: u16) -> T {}
              ^

error[E0006]: Type not found.
 --> lib.cairo:7:36
    fn foo(x: T, y: u8, z: u16) -> T {}
                                   ^

error[E2031]: Parameter type of impl function `MyImpl::foo` is incompatible with `MyTrait::foo`. Expected: `core::integer::u8`, actual: `core::integer::u16`.
 --> lib.cairo:7:28
    fn foo(x: T, y: u8, z: u16) -> T {}
                           ^^^

//! > ==========================================================================

//! > Impl provides associated type/const/impl items each with the wrong kind (cross-kind collision).

//! > test_runner_name
test_function_diagnostics(expect_diagnostics: true)

//! > function_code
fn foo() -> MyImpl::AsType {
    let _c = MyImpl::AsConst;
    MyImpl::AsImpl::method(0)
}

//! > function_name
foo

//! > module_code
trait OtherTrait<T> {
    fn method(x: T) -> T;
}

impl OtherImpl of OtherTrait<felt252> {
    fn method(x: felt252) -> felt252 {
        x
    }
}

trait MyTrait {
    type AsType;
    const AsConst: felt252;
    impl AsImpl: OtherTrait<felt252>;
}

impl MyImpl of MyTrait {
    const AsType: felt252 = 5;
    type AsConst = felt252;
    type AsImpl = felt252;
}

//! > expected_diagnostics
error[E2014]: Impl item type `MyImpl::AsConst` is not a member of trait `MyTrait`.
 --> lib.cairo:19:5
    type AsConst = felt252;
    ^^^^^^^^^^^^^^^^^^^^^^^

error[E2014]: Impl item type `MyImpl::AsImpl` is not a member of trait `MyTrait`.
 --> lib.cairo:20:5
    type AsImpl = felt252;
    ^^^^^^^^^^^^^^^^^^^^^^

error[E2014]: Impl item const `MyImpl::AsType` is not a member of trait `MyTrait`.
 --> lib.cairo:18:5
    const AsType: felt252 = 5;
    ^^^^^^^^^^^^^^^^^^^^^^^^^^

error[E2311]: Trait has no implementation in context: test::MyTrait.
 --> lib.cairo:22:1
fn foo() -> MyImpl::AsType {
^^^^^^^^^^^^^^^^^^^^^^^^^^

error[E2042]: Unexpected return type. Expected: "test::MyImpl::AsType", found: "core::felt252".
 --> lib.cairo:24:5
    MyImpl::AsImpl::method(0)
    ^^^^^^^^^^^^^^^^^^^^^^^^^