cairo-lang-lowering 2.17.0

//! > Test fixed size array.

//! > test_runner_name
test_function_lowering(expect_diagnostics: false)

//! > function_code
fn foo() {
    let x = [10, 20, 30];
    bar(x);
}

//! > function_name
foo

//! > module_code
#[inline(never)]
fn bar(x: [felt252; 3]) {
    let _y = x;
}

//! > semantic_diagnostics

//! > lowering_diagnostics

//! > lowering_flat
Parameters:
blk0 (root):
Statements:
  (v0: core::felt252) <- 10
  (v1: core::felt252) <- 20
  (v2: core::felt252) <- 30
  (v3: [core::felt252; 3]) <- struct_construct(v0, v1, v2)
  () <- test::bar(v3)
End:
  Return()

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

//! > Test fixed size array, short notation.

//! > test_runner_name
test_function_lowering(expect_diagnostics: false)

//! > function_code
fn foo() -> [felt252; 3] {
    [get_10(); 3]
}

//! > function_name
foo

//! > module_code
#[inline(never)]
fn get_10() -> felt252 {
    10
}

#[inline(never)]
fn bar(x: [felt252; 3]) {
    let _y = x;
}

//! > semantic_diagnostics

//! > lowering_diagnostics

//! > lowering_flat
Parameters:
blk0 (root):
Statements:
  (v0: core::felt252) <- test::get_10()
  (v1: [core::felt252; 3]) <- struct_construct(v0, v0, v0)
End:
  Return(v1)

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

//! > Test fixed size array, short notation, duplicateble, with generics.

//! > test_runner_name
test_function_lowering(expect_diagnostics: false)

//! > function_code
fn foo() -> [MyStruct; 3] {
    foo_ex()
}
fn foo_ex<T, +Drop<[T; 3]>, +Copy<T>, +CtorTrait<T>>() -> [T; 3] {
    [CtorTrait::<T>::new(); 3]
}

//! > function_name
foo

//! > module_code
#[derive(Drop, Copy)]
struct MyStruct {
    x: felt252,
}

trait CtorTrait<T> {
    fn new() -> T;
}

impl CtorMyStruct of CtorTrait<MyStruct> {
    fn new() -> MyStruct {
        MyStruct { x: 10 }
    }
}

//! > semantic_diagnostics

//! > lowering_diagnostics

//! > lowering_flat
Parameters:
blk0 (root):
Statements:
  (v0: core::felt252) <- 10
  (v1: test::MyStruct) <- struct_construct(v0)
  (v2: [test::MyStruct; 3]) <- struct_construct(v1, v1, v1)
End:
  Return(v2)

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

//! > Test fixed size array, short notation, not duplicateble.

//! > test_runner_name
test_function_lowering(expect_diagnostics: true)

//! > function_code
fn foo() -> [MyStruct; 3] {
    [MyStruct { x: 10 }; 3]
}

//! > function_name
foo

//! > module_code
#[derive(Drop)]
struct MyStruct {
    x: felt252,
}

//! > semantic_diagnostics

//! > lowering_diagnostics
error[E3012]: Fixed size array inner type must implement the `Copy` trait when the array size is greater than 1.
 --> lib.cairo:6:5
    [MyStruct { x: 10 }; 3]
    ^^^^^^^^^^^^^^^^^^^^^^^

//! > lowering_flat
<Failed lowering function - run with RUST_LOG=warn (or less) to see diagnostics>

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

//! > Test fixed size array, short notation, not duplicateble, with generics.

//! > test_runner_name
test_function_lowering(expect_diagnostics: true)

//! > function_code
fn foo() -> [MyStruct; 3] {
    foo_ex()
}
fn foo_ex<T, +Drop<[T; 3]>, +CtorTrait<T>>() -> [T; 3] {
    [CtorTrait::<T>::new(); 3]
}

//! > function_name
foo

//! > module_code
#[derive(Drop)]
struct MyStruct {
    x: felt252,
}

trait CtorTrait<T> {
    fn new() -> T;
}

impl CtorMyStruct of CtorTrait<MyStruct> {
    fn new() -> MyStruct {
        MyStruct { x: 10 }
    }
}

//! > semantic_diagnostics

//! > lowering_diagnostics
error[E3012]: Fixed size array inner type must implement the `Copy` trait when the array size is greater than 1.
 --> lib.cairo:19:5
    [CtorTrait::<T>::new(); 3]
    ^^^^^^^^^^^^^^^^^^^^^^^^^^

//! > lowering_flat
<Failed lowering function - run with RUST_LOG=warn (or less) to see diagnostics>

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

//! > Test fixed size array, short notation, not duplicateble, size 1.

//! > test_runner_name
test_function_lowering(expect_diagnostics: false)

//! > function_code
fn foo() -> [MyStruct; 1] {
    [MyStruct { x: 10 }; 1]
}

//! > function_name
foo

//! > module_code
#[derive(Drop)]
struct MyStruct {
    x: felt252,
}

//! > semantic_diagnostics

//! > lowering_diagnostics

//! > lowering_flat
Parameters:
blk0 (root):
Statements:
  (v0: core::felt252) <- 10
  (v1: test::MyStruct) <- struct_construct(v0)
  (v2: [test::MyStruct; 1]) <- struct_construct(v1)
End:
  Return(v2)

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

//! > Test fixed size array of size 0.

//! > test_runner_name
test_function_lowering(expect_diagnostics: true)

//! > function_code
fn foo() -> [u32; 0] {
    [0_u32; 0]
}

//! > function_name
foo

//! > semantic_diagnostics

//! > lowering_diagnostics
error[E3013]: Fixed size array repeated element size must be greater than 0.
 --> lib.cairo:2:5
    [0_u32; 0]
    ^^^^^^^^^^

//! > lowering_flat
<Failed lowering function - run with RUST_LOG=warn (or less) to see diagnostics>