cairo-lang-lowering 2.4.1

Cairo lowering phase.
Documentation 
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//! > Test struct constructor.

//! > test_runner_name
test_function_lowering

//! > function
fn foo(a: felt252) -> MyStruct {
    MyStruct{a: (), c: (3, 7), b: a}
}

//! > function_name
foo

//! > module_code
struct MyStruct {
  a: (),
  b: felt252,
  c: (felt252, felt252),
}

//! > semantic_diagnostics

//! > lowering_diagnostics

//! > lowering_flat
Parameters: v0: core::felt252
blk0 (root):
Statements:
  (v1: ()) <- struct_construct()
  (v2: core::felt252) <- 3u
  (v3: core::felt252) <- 7u
  (v4: (core::felt252, core::felt252)) <- struct_construct(v2, v3)
  (v5: test::MyStruct) <- struct_construct(v1, v0, v4)
End:
  Return(v5)

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

//! > Test struct member access.

//! > test_runner_name
test_function_lowering

//! > function
fn foo(s: MyStruct) -> felt252 {
    s.b
}

//! > function_name
foo

//! > module_code
struct MyStruct {
  a: (),
  b: felt252,
  c: (felt252, felt252),
}

//! > semantic_diagnostics

//! > lowering_diagnostics

//! > lowering_flat
Parameters: v0: test::MyStruct
blk0 (root):
Statements:
  (v1: (), v2: core::felt252, v3: (core::felt252, core::felt252)) <- struct_destructure(v0)
End:
  Return(v2)

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

//! > Test struct destructure.

//! > test_runner_name
test_function_lowering

//! > function
fn foo(s: MyStruct) -> (felt252, felt252) {
    let MyStruct { a: _, c: (v, _), b} = s;
    (v, b)
}

//! > function_name
foo

//! > module_code
struct MyStruct {
  a: (),
  b: felt252,
  c: (felt252, felt252),
}

//! > semantic_diagnostics

//! > lowering_diagnostics

//! > lowering_flat
Parameters: v0: test::MyStruct
blk0 (root):
Statements:
  (v1: (), v2: core::felt252, v3: (core::felt252, core::felt252)) <- struct_destructure(v0)
  (v4: core::felt252, v5: core::felt252) <- struct_destructure(v3)
  (v6: (core::felt252, core::felt252)) <- struct_construct(v4, v2)
End:
  Return(v6)