trait_default_fn

//! > Test default implementation with basic implementation and override.

//! > test_runner_name
test_function_diagnostics(expect_diagnostics: false)

//! > function
fn foo() {
    MyTrait::foo(5_u64);
    MyTrait::foo(3_u32);
}

//! > function_name
foo

//! > module_code
trait MyTrait<T> {
    fn foo(t: T) -> T {
        t
    }
}
impl MyImplU64 of MyTrait<u64>;
impl MyImplU32 of MyTrait<u32> {
    fn foo(t: u32) -> u32 {
        t + 1
    }
}

//! > expected_diagnostics

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

//! > Test default implementation with a self reference.

//! > test_runner_name
test_function_diagnostics(expect_diagnostics: false)

//! > function
fn foo() {}

//! > function_name
foo

//! > module_code
trait MyTrait<T> {
    fn inner(x: T, y: T) -> T;
    fn foo<+Copy<T>>(x: T) -> T {
        Self::inner(x, x)
    }
}
impl MyImplU32 of MyTrait<u32> {
    fn inner(x: u32, y: u32) -> u32 {
        x + y
    }
}

//! > expected_diagnostics

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

//! > Test default implementation with mut.

//! > TODO(oziv): Support mut in default implementations.

//! > test_runner_name
test_function_diagnostics(expect_diagnostics: true)

//! > function
fn foo() {}

//! > function_name
foo

//! > module_code
trait MyTrait {
    fn foo(mut x: u32) -> u32 {
        x += 1;
        x
    }
}

//! > expected_diagnostics
error: Parameter of trait function `MyTrait::foo` can't be defined as mutable.
 --> lib.cairo:2:12
    fn foo(mut x: u32) -> u32 {
           ^^^

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

//! > Test default implementation with using `Self` as an outside impl.

//! > test_runner_name
test_function_diagnostics(expect_diagnostics: false)

//! > function
fn foo() {}

//! > function_name
foo

//! > module_code
trait MyTrait {
    fn default_impl() {
        bar::<Self>();
    }
}

fn bar<+MyTrait>() {}

//! > expected_diagnostics