cairo-lang-semantic 2.20.0

Cairo semantic model.
Documentation 
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//! > Test tuple index access - valid

//! > test_runner_name
test_function_diagnostics(expect_diagnostics: false)

//! > function_code
fn foo(t: (felt252, u8)) -> u8 {
    t.1
}

//! > function_name
foo

//! > module_code

//! > expected_diagnostics

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

//! > Test tuple index access - out of bounds

//! > test_runner_name
test_function_diagnostics(expect_diagnostics: true)

//! > function_code
fn foo(t: (felt252, u8)) -> felt252 {
    t.5
}

//! > function_name
foo

//! > module_code

//! > expected_diagnostics
error[E0007]: Type "(core::felt252, core::integer::u8)" has no member "5"
 --> lib.cairo:2:7
    t.5
      ^

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

//! > Test tuple index access - non-tuple type

//! > test_runner_name
test_function_diagnostics(expect_diagnostics: true)

//! > function_code
fn foo(x: felt252) -> felt252 {
    x.0
}

//! > function_name
foo

//! > module_code

//! > expected_diagnostics
error[E0007]: Type "core::felt252" has no member "0"
 --> lib.cairo:2:7
    x.0
      ^

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

//! > Test tuple index access - type suffix rejected

//! > test_runner_name
test_function_diagnostics(expect_diagnostics: true)

//! > function_code
fn foo(t: (felt252, u8)) -> felt252 {
    t.0_u8
}

//! > function_name
foo

//! > module_code

//! > expected_diagnostics
error[E2085]: Invalid member expression.
 --> lib.cairo:2:7
    t.0_u8
      ^^^^

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

//! > Test tuple index access - hex base rejected

//! > test_runner_name
test_function_diagnostics(expect_diagnostics: true)

//! > function_code
fn foo(t: (felt252, u8)) -> u8 {
    t.0x1
}

//! > function_name
foo

//! > module_code

//! > expected_diagnostics
error[E2085]: Invalid member expression.
 --> lib.cairo:2:7
    t.0x1
      ^^^

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

//! > Test tuple index access - leading zero rejected

//! > test_runner_name
test_function_diagnostics(expect_diagnostics: true)

//! > function_code
fn foo(t: (felt252, u8)) -> (felt252, felt252) {
    (t.00, t.0x1)
}

//! > function_name
foo

//! > module_code

//! > expected_diagnostics
error[E0007]: Type "(core::felt252, core::integer::u8)" has no member "00"
 --> lib.cairo:2:8
    (t.00, t.0x1)
       ^^

error[E2085]: Invalid member expression.
 --> lib.cairo:2:14
    (t.00, t.0x1)
             ^^^

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

//! > Test tuple index access - assignment to element

//! > test_runner_name
test_function_diagnostics(expect_diagnostics: false)

//! > function_code
fn foo(mut t: (felt252, u8)) {
    t.0 = 5;
}

//! > function_name
foo

//! > module_code

//! > expected_diagnostics

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

//! > Test tuple index access - through Deref

//! > test_runner_name
test_function_diagnostics(expect_diagnostics: false)

//! > function_code
fn foo(w: Wrapper) -> u8 {
    w.1
}

//! > function_name
foo

//! > module_code
#[derive(Drop, Copy)]
struct Wrapper {
    inner: (felt252, u8),
}

impl WrapperDeref of core::ops::Deref<Wrapper> {
    type Target = (felt252, u8);
    fn deref(self: Wrapper) -> (felt252, u8) {
        self.inner
    }
}

//! > expected_diagnostics