cairo-lang-semantic 2.18.0

Cairo semantic model.
Documentation 
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//! > let-else wrong types

//! > test_runner_name
test_function_diagnostics(expect_diagnostics: true)

//! > function_code
fn foo() {
    let MyEnum::A(x): felt252 = MyEnum::A(7) else {
        return;
    };
    let MyEnum::A(x): felt252 = 7 else {
        return;
    };
    let MyEnum2::A(x): MyEnum = MyEnum::A(7) else {
        return;
    };
}

//! > function_name
foo

//! > module_code
enum MyEnum {
    A: felt252,
    B: felt252,
}

enum MyEnum2 {
    A: felt252,
    B: felt252,
}

//! > expected_diagnostics
error[E2041]: Unexpected argument type. Expected: "core::felt252", found: "test::MyEnum".
 --> lib.cairo:11:33
    let MyEnum::A(x): felt252 = MyEnum::A(7) else {
                                ^^^^^^^^^^^^

error[E2103]: Mismatched types: pattern cannot match against type "core::felt252".
 --> lib.cairo:11:9
    let MyEnum::A(x): felt252 = MyEnum::A(7) else {
        ^^^^^^^^^^^^

error[E2103]: Mismatched types: pattern cannot match against type "core::felt252".
 --> lib.cairo:14:9
    let MyEnum::A(x): felt252 = 7 else {
        ^^^^^^^^^^^^

error[E2109]: Wrong enum in pattern. Expected: "MyEnum". Got: "MyEnum2".
 --> lib.cairo:17:9
    let MyEnum2::A(x): MyEnum = MyEnum::A(7) else {
        ^^^^^^^^^^^^^

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

//! > let-else try access pattern variable in else arm.

//! > test_runner_name
test_function_diagnostics(expect_diagnostics: true)

//! > function_code
fn foo() {
    let MyEnum::A(x) = MyEnum::A(7) else {
        return x;
    };
}

//! > function_name
foo

//! > module_code
enum MyEnum {
    A: felt252,
    B: felt252,
}

//! > expected_diagnostics
error[E0006]: Identifier not found.
 --> lib.cairo:7:16
        return x;
               ^

warning[E0001]: Unused variable. Consider ignoring by prefixing with `_`.
 --> lib.cairo:6:19
    let MyEnum::A(x) = MyEnum::A(7) else {
                  ^