cairo-lang-semantic 2.18.0

Cairo semantic model.
Documentation 
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//! > Test struct snapshot.

//! > test_runner_name
test_function_diagnostics

//! > function_code
fn foo(a: @A) {
    bar(a.a, a.b);
}

//! > function_name
foo

//! > module_code
struct A {
    a: Array<felt252>,
    b: felt252,
}
fn bar(a: @Array::<felt252>, b: @felt252) {}

//! > expected_diagnostics

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

//! > Test coercion failure.

//! > test_runner_name
test_function_diagnostics(expect_diagnostics: true)

//! > function_code
fn foo() {
    let _x: @felt252 = 5;
    let _y: felt252 = @6;
}

//! > function_name
foo

//! > expected_diagnostics
error[E2041]: Unexpected argument type. Expected: "core::felt252", found: "@?1".
It is possible that the type inference failed because the types differ in the number of snapshots.
Consider adding or removing snapshots.
 --> lib.cairo:3:23
    let _y: felt252 = @6;
                      ^^

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

//! > Test coercion failure - no inference.

//! > test_runner_name
test_function_diagnostics(expect_diagnostics: true)

//! > function_code
fn foo() {
    let _x: @felt252 = 5_felt252;
    let _y: felt252 = @6_felt252;
}

//! > function_name
foo

//! > expected_diagnostics
error[E2041]: Unexpected argument type. Expected: "@core::felt252", found: "core::felt252".
 --> lib.cairo:2:24
    let _x: @felt252 = 5_felt252;
                       ^^^^^^^^^

error[E2041]: Unexpected argument type. Expected: "core::felt252", found: "@core::felt252".
 --> lib.cairo:3:23
    let _y: felt252 = @6_felt252;
                      ^^^^^^^^^^

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

//! > Test struct snapshot auto member access desnap.

//! > test_runner_name
test_function_diagnostics

//! > crate_settings
edition = "2025_12"

//! > function_code
fn foo(a: @A) {
    let _: @Array<felt252> = @a.a;
    let _: @Array<felt252> = @(@a).a;
    let _: @@Array<felt252> = @@(@a).a;
    let _: felt252 = a.b;
    let _: @felt252 = @a.b;
    let _: @felt252 = @(@a).b;
    let _: @@felt252 = @@(@a).b;
}

//! > function_name
foo

//! > module_code
struct A {
    a: Array<felt252>,
    b: felt252,
}

//! > expected_diagnostics