cairo-lang-lowering 2.17.0

//! > match non-sequential numbers.

//! > test_runner_name
test_function_lowering(expect_diagnostics: false)

//! > function_code
fn foo(a: felt252) -> felt252 {
    let b = match a {
        5 => { 550 },
        6 => { 70 },
        _ => { 90 },
    };
    return b;
}

//! > function_name
foo

//! > semantic_diagnostics

//! > lowering_diagnostics

//! > lowering_flat
Parameters: v0: core::felt252
blk0 (root):
Statements:
  (v1: core::felt252) <- 5
  (v2: core::felt252) <- core::felt252_sub(v0, v1)
End:
  Match(match core::felt252_is_zero(v2) {
    IsZeroResult::Zero => blk1,
    IsZeroResult::NonZero(v3) => blk2,
  })

blk1:
Statements:
  (v4: core::felt252) <- 550
End:
  Return(v4)

blk2:
Statements:
  (v5: core::felt252) <- 6
  (v6: core::felt252) <- core::felt252_sub(v0, v5)
End:
  Match(match core::felt252_is_zero(v6) {
    IsZeroResult::Zero => blk3,
    IsZeroResult::NonZero(v7) => blk4,
  })

blk3:
Statements:
  (v8: core::felt252) <- 70
End:
  Return(v8)

blk4:
Statements:
  (v9: core::felt252) <- 90
End:
  Return(v9)

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

//! > match felt.

//! > test_runner_name
test_function_lowering(expect_diagnostics: false)

//! > function_code
fn foo(a: felt252) -> felt252 {
    match a {
        0 => 11,
        2 => 33,
        1 => 22,
        _ => 44,
    }
}

//! > function_name
foo

//! > semantic_diagnostics

//! > lowering_diagnostics

//! > lowering_flat
Parameters: v0: core::felt252
blk0 (root):
Statements:
End:
  Match(match core::felt252_is_zero(v0) {
    IsZeroResult::Zero => blk1,
    IsZeroResult::NonZero(v1) => blk2,
  })

blk1:
Statements:
  (v2: core::felt252) <- 11
End:
  Return(v2)

blk2:
Statements:
  (v3: core::felt252) <- 2
  (v4: core::felt252) <- core::felt252_sub(v0, v3)
End:
  Match(match core::felt252_is_zero(v4) {
    IsZeroResult::Zero => blk3,
    IsZeroResult::NonZero(v5) => blk4,
  })

blk3:
Statements:
  (v6: core::felt252) <- 33
End:
  Return(v6)

blk4:
Statements:
  (v7: core::felt252) <- 1
  (v8: core::felt252) <- core::felt252_sub(v0, v7)
End:
  Match(match core::felt252_is_zero(v8) {
    IsZeroResult::Zero => blk5,
    IsZeroResult::NonZero(v9) => blk6,
  })

blk5:
Statements:
  (v10: core::felt252) <- 22
End:
  Return(v10)

blk6:
Statements:
  (v11: core::felt252) <- 44
End:
  Return(v11)

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

//! > Test match 0.

//! > test_runner_name
test_function_lowering(expect_diagnostics: false)

//! > function_code
fn foo(a: felt252, x: felt252) -> felt252 {
    match x {
        0 => a + 1,
        _ => x,
    }
}

//! > function_name
foo

//! > semantic_diagnostics

//! > lowering_diagnostics

//! > lowering_flat
Parameters: v0: core::felt252, v1: core::felt252
blk0 (root):
Statements:
End:
  Match(match core::felt252_is_zero(v1) {
    IsZeroResult::Zero => blk1,
    IsZeroResult::NonZero(v2) => blk2,
  })

blk1:
Statements:
  (v3: core::felt252) <- 1
  (v4: core::felt252) <- core::felt252_add(v0, v3)
End:
  Return(v4)

blk2:
Statements:
End:
  Return(v1)

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

//! > Test array at.

//! > test_runner_name
test_function_lowering(expect_diagnostics: false)

//! > function_code
fn foo(a: @Array::<felt252>) -> Option<Box<@felt252>> {
    core::array::array_get(a, 1_u32)
}

//! > function_name
foo

//! > semantic_diagnostics

//! > lowering_diagnostics

//! > lowering_flat
Parameters: v0: core::RangeCheck, v1: @core::array::Array::<core::felt252>
blk0 (root):
Statements:
  (v2: core::integer::u32) <- 1
End:
  Match(match core::array::array_get::<core::felt252>(v0, v1, v2) {
    Option::Some(v3, v4) => blk1,
    Option::None(v5) => blk2,
  })

blk1:
Statements:
  (v6: core::option::Option::<core::box::Box::<@core::felt252>>) <- Option::Some(v4)
End:
  Return(v3, v6)

blk2:
Statements:
  (v7: ()) <- struct_construct()
  (v8: core::option::Option::<core::box::Box::<@core::felt252>>) <- Option::None(v7)
End:
  Return(v5, v8)

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

//! > Test unsupported match zero.

//! > test_runner_name
test_function_lowering(expect_diagnostics: true)

//! > function_code
fn foo() -> felt252 {
    let x = 7;
    match x {
        0 => x,
        1 => 7,
    }
}

//! > function_name
foo

//! > semantic_diagnostics

//! > lowering_diagnostics
error[E3004]: Match is non-exhaustive: `_` not covered.
 --> lib.cairo:3:5-6:5
      match x {
 _____^
| ...
|     }
|_____^

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

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

//! > Test supported match non felt252 value.

//! > test_runner_name
test_function_lowering(expect_diagnostics: false)

//! > function_code
fn foo(v: u8) {
    match v {
        0_u8 => 7,
        1_u8 | 2_u8 => 8,
        _ => 9,
    };
}

//! > function_name
foo

//! > semantic_diagnostics

//! > lowering_diagnostics

//! > lowering_flat
Parameters: v0: core::integer::u8
blk0 (root):
Statements:
  (v1: core::felt252) <- core::internal::bounded_int::upcast::<core::integer::u8, core::felt252>(v0)
End:
  Match(match core::felt252_is_zero(v1) {
    IsZeroResult::Zero => blk1,
    IsZeroResult::NonZero(v2) => blk2,
  })

blk1:
Statements:
End:
  Return()

blk2:
Statements:
  (v3: core::felt252) <- 1
  (v4: core::felt252) <- core::felt252_sub(v1, v3)
End:
  Match(match core::felt252_is_zero(v4) {
    IsZeroResult::Zero => blk3,
    IsZeroResult::NonZero(v5) => blk4,
  })

blk3:
Statements:
End:
  Return()

blk4:
Statements:
  (v6: core::felt252) <- 2
  (v7: core::felt252) <- core::felt252_sub(v1, v6)
End:
  Match(match core::felt252_is_zero(v7) {
    IsZeroResult::Zero => blk5,
    IsZeroResult::NonZero(v8) => blk6,
  })

blk5:
Statements:
End:
  Return()

blk6:
Statements:
End:
  Return()

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

//! > Test supported match BoundedInt value.

//! > test_runner_name
test_function_lowering(expect_diagnostics: false)

//! > function_code
fn foo(v: Number) {
    match v {
        0 => 7,
        1 | 2 => 8,
        _ => 9,
    };
}

//! > function_name
foo

//! > module_code
#[feature("bounded-int-utils")]
type Number = core::internal::bounded_int::BoundedInt<-30, 90>;

//! > semantic_diagnostics

//! > lowering_diagnostics

//! > lowering_flat
Parameters: v0: core::internal::bounded_int::BoundedInt::<-30, 90>
blk0 (root):
Statements:
  (v1: core::felt252) <- core::internal::bounded_int::upcast::<core::internal::bounded_int::BoundedInt::<-30, 90>, core::felt252>(v0)
End:
  Match(match core::felt252_is_zero(v1) {
    IsZeroResult::Zero => blk1,
    IsZeroResult::NonZero(v2) => blk2,
  })

blk1:
Statements:
End:
  Return()

blk2:
Statements:
  (v3: core::felt252) <- 1
  (v4: core::felt252) <- core::felt252_sub(v1, v3)
End:
  Match(match core::felt252_is_zero(v4) {
    IsZeroResult::Zero => blk3,
    IsZeroResult::NonZero(v5) => blk4,
  })

blk3:
Statements:
End:
  Return()

blk4:
Statements:
  (v6: core::felt252) <- 2
  (v7: core::felt252) <- core::felt252_sub(v1, v6)
End:
  Match(match core::felt252_is_zero(v7) {
    IsZeroResult::Zero => blk5,
    IsZeroResult::NonZero(v8) => blk6,
  })

blk5:
Statements:
End:
  Return()

blk6:
Statements:
End:
  Return()

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

//! > Test unsupported match non felt252 value.

//! > test_runner_name
test_function_lowering(expect_diagnostics: true)

//! > function_code
fn foo() {
    match 5 {
        0_u8 => 7,
        1_felt252 | 2_u8 => 8,
        _ => 9,
    };
}

//! > function_name
foo

//! > semantic_diagnostics
error[E2302]: Type mismatch: `core::felt252` and `core::integer::u8`.
 --> lib.cairo:4:9
        1_felt252 | 2_u8 => 8,
        ^^^^^^^^^

//! > lowering_diagnostics

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

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

//! > Test empty enum match.

//! > test_runner_name
test_function_lowering(expect_diagnostics: true)

//! > function_code
fn foo() {
    match Some(5) {};
}

//! > function_name
foo

//! > semantic_diagnostics

//! > lowering_diagnostics
error[E3004]: Match is non-exhaustive: `_` not covered.
 --> lib.cairo:2:5
    match Some(5) {};
    ^^^^^^^^^^^^^^^^

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

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

//! > Test empty enum match on empty enum.

//! > test_runner_name
test_function_lowering(expect_diagnostics: false)

//! > function_code
fn foo(e: EmptyEnum) {
    match e {};
}

//! > function_name
foo

//! > module_code
enum EmptyEnum {}

//! > semantic_diagnostics

//! > lowering_diagnostics

//! > lowering_flat
Parameters: v0: test::EmptyEnum
blk0 (root):
Statements:
End:
  Match(match_enum(v0) {
  })

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

//! > Test empty extern match.

//! > test_runner_name
test_function_lowering(expect_diagnostics: true)

//! > function_code
fn foo() {
    match felt252_is_zero(5) {};
}

//! > function_name
foo

//! > semantic_diagnostics

//! > lowering_diagnostics
error[E3004]: Match is non-exhaustive: `_` not covered.
 --> lib.cairo:2:5
    match felt252_is_zero(5) {};
    ^^^^^^^^^^^^^^^^^^^^^^^^^^^

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

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

//! > Test otherwise extern match arm.

//! > test_runner_name
test_function_lowering(expect_diagnostics: false)

//! > function_code
fn foo() -> felt252 {
    match get_a() {
        A::One(_) => 2,
        _ => 3,
    }
}

//! > function_name
foo

//! > module_code
enum A {
    One: (),
    Two: (),
    Three: (),
}

extern fn get_a() -> A nopanic;

//! > semantic_diagnostics

//! > lowering_diagnostics

//! > lowering_flat
Parameters:
blk0 (root):
Statements:
End:
  Match(match test::get_a() {
    A::One => blk1,
    A::Two => blk2,
    A::Three => blk3,
  })

blk1:
Statements:
  (v0: core::felt252) <- 2
End:
  Return(v0)

blk2:
Statements:
End:
  Goto(blk4, {})

blk3:
Statements:
End:
  Goto(blk4, {})

blk4:
Statements:
  (v1: core::felt252) <- 3
End:
  Return(v1)

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

//! > Test otherwise match arm.

//! > test_runner_name
test_function_lowering(expect_diagnostics: true)

//! > function_code
fn foo(a: A) -> felt252 {
    match a {
        A::Two(_) => 2,
        A::One(_) => 1,
        _ => 3,
        A::Two(_) => 4,
        A::Three(_) => 5,
    }
}

//! > function_name
foo

//! > module_code
enum A {
    One: (),
    Two: (),
    Three: (felt252, felt252),
    Four: (felt252,),
}

//! > semantic_diagnostics

//! > lowering_diagnostics
warning[E3004]: Unreachable pattern arm.
 --> lib.cairo:13:24
        A::Three(_) => 5,
                       ^

warning[E3004]: Unreachable pattern arm.
 --> lib.cairo:12:22
        A::Two(_) => 4,
                     ^

//! > lowering_flat
Parameters: v0: test::A
blk0 (root):
Statements:
End:
  Match(match_enum(v0) {
    A::One(v1) => blk1,
    A::Two(v2) => blk2,
    A::Three(v3) => blk3,
    A::Four(v4) => blk4,
  })

blk1:
Statements:
  (v5: core::felt252) <- 1
End:
  Return(v5)

blk2:
Statements:
  (v6: core::felt252) <- 2
End:
  Return(v6)

blk3:
Statements:
End:
  Goto(blk5, {})

blk4:
Statements:
End:
  Goto(blk5, {})

blk5:
Statements:
  (v7: core::felt252) <- 3
End:
  Return(v7)

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

//! > Test out of order extern match arm.

//! > test_runner_name
test_function_lowering(expect_diagnostics: false)

//! > function_code
fn foo() -> felt252 {
    match get_a() {
        A::Two(_) => { 2 },
        A::One(_) => { 1 },
    }
}

//! > function_name
foo

//! > module_code
enum A {
    One: (),
    Two: (),
}

extern fn get_a() -> A nopanic;

//! > semantic_diagnostics

//! > lowering_diagnostics

//! > lowering_flat
Parameters:
blk0 (root):
Statements:
End:
  Match(match test::get_a() {
    A::One => blk1,
    A::Two => blk2,
  })

blk1:
Statements:
  (v0: core::felt252) <- 1
End:
  Return(v0)

blk2:
Statements:
  (v1: core::felt252) <- 2
End:
  Return(v1)

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

//! > Test out of order match arm.

//! > test_runner_name
test_function_lowering(expect_diagnostics: false)

//! > function_code
fn foo(a: A) -> felt252 {
    match a {
        A::Two(_) => { 2 },
        A::One(_) => { 1 },
    }
}

//! > function_name
foo

//! > module_code
enum A {
    One: (),
    Two: (),
}

//! > semantic_diagnostics

//! > lowering_diagnostics

//! > lowering_flat
Parameters: v0: test::A
blk0 (root):
Statements:
End:
  Match(match_enum(v0) {
    A::One(v1) => blk1,
    A::Two(v2) => blk2,
  })

blk1:
Statements:
  (v3: core::felt252) <- 1
End:
  Return(v3)

blk2:
Statements:
  (v4: core::felt252) <- 2
End:
  Return(v4)

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

//! > Match on tuples.

//! > test_runner_name
test_function_lowering(expect_diagnostics: false)

//! > function_code
fn foo(a: (felt252, felt252)) -> felt252 {
    match a {
        (0, 1) => 0,
        _ => 1,
    }
}

//! > function_name
foo

//! > semantic_diagnostics

//! > lowering_diagnostics

//! > lowering_flat
Parameters: v0: (core::felt252, core::felt252)
blk0 (root):
Statements:
  (v1: core::felt252, v2: core::felt252) <- struct_destructure(v0)
End:
  Match(match core::felt252_is_zero(v1) {
    IsZeroResult::Zero => blk1,
    IsZeroResult::NonZero(v3) => blk4,
  })

blk1:
Statements:
  (v4: core::felt252) <- 1
  (v5: core::felt252) <- core::felt252_sub(v2, v4)
End:
  Match(match core::felt252_is_zero(v5) {
    IsZeroResult::Zero => blk2,
    IsZeroResult::NonZero(v6) => blk3,
  })

blk2:
Statements:
  (v7: core::felt252) <- 0
End:
  Return(v7)

blk3:
Statements:
End:
  Goto(blk5, {})

blk4:
Statements:
End:
  Goto(blk5, {})

blk5:
Statements:
  (v8: core::felt252) <- 1
End:
  Return(v8)

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

//! > Match with complex patterns.

//! > test_runner_name
test_function_lowering(expect_diagnostics: true)

//! > function_code
fn foo(a: Option<Option<felt252>>) -> felt252 {
    match a {
        Some(Some(x)) => x,
        None(_) => 1,
    }
}

//! > function_name
foo

//! > semantic_diagnostics

//! > lowering_diagnostics
error[E3004]: Match is non-exhaustive: `Some(None(_))` not covered.
 --> lib.cairo:2:5-5:5
      match a {
 _____^
| ...
|     }
|_____^

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

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

//! > Test missing arms.

//! > test_runner_name
test_function_lowering(expect_diagnostics: true)

//! > function_code
fn foo(a: A) -> felt252 {
    match a {
        A::Two(_) => 2,
        A::One(_) => 1,
    }
}

//! > function_name
foo

//! > module_code
enum A {
    One: (),
    Two: (),
    Three: (),
    Four: (),
}

//! > semantic_diagnostics

//! > lowering_diagnostics
error[E3004]: Match is non-exhaustive: `Three(_)` not covered.
 --> lib.cairo:8:5-11:5
      match a {
 _____^
| ...
|     }
|_____^

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

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

//! > Test match on bool literals.

//! > test_runner_name
test_function_lowering(expect_diagnostics: false)

//! > function_code
fn foo(a: bool) -> felt252 {
    match a {
        true => 2,
        false => 1,
    }
}

//! > function_name
foo

//! > semantic_diagnostics

//! > lowering_diagnostics

//! > lowering_flat
Parameters: v0: core::bool
blk0 (root):
Statements:
End:
  Match(match_enum(v0) {
    bool::False(v1) => blk1,
    bool::True(v2) => blk2,
  })

blk1:
Statements:
  (v3: core::felt252) <- 1
End:
  Return(v3)

blk2:
Statements:
  (v4: core::felt252) <- 2
End:
  Return(v4)

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

//! > Test match with or pattern with arm variables.

//! > test_runner_name
test_function_lowering(expect_diagnostics: false)

//! > function_code
fn foo(a: MyEnum) -> felt252 {
    match a {
        MyEnum::A(x) | MyEnum::B((x, _)) => x,
        MyEnum::C((x, _, t)) | MyEnum::D(P { x, z: t, .. }) => x + t,
    }
}

//! > function_name
foo

//! > module_code
struct P {
    x: felt252,
    y: felt252,
    z: felt252,
    w: felt252,
}
enum MyEnum {
    A: felt252,
    C: (felt252, felt252, felt252),
    B: (felt252, felt252),
    D: P,
}

//! > semantic_diagnostics

//! > lowering_diagnostics

//! > lowering_flat
Parameters: v0: test::MyEnum
blk0 (root):
Statements:
End:
  Match(match_enum(v0) {
    MyEnum::A(v1) => blk1,
    MyEnum::C(v2) => blk2,
    MyEnum::B(v3) => blk3,
    MyEnum::D(v4) => blk4,
  })

blk1:
Statements:
End:
  Return(v1)

blk2:
Statements:
  (v5: core::felt252, v6: core::felt252, v7: core::felt252) <- struct_destructure(v2)
End:
  Goto(blk5, {v5 -> v8, v7 -> v9})

blk3:
Statements:
  (v10: core::felt252, v11: core::felt252) <- struct_destructure(v3)
End:
  Return(v10)

blk4:
Statements:
  (v12: core::felt252, v13: core::felt252, v14: core::felt252, v15: core::felt252) <- struct_destructure(v4)
End:
  Goto(blk5, {v12 -> v8, v14 -> v9})

blk5:
Statements:
  (v16: core::felt252) <- core::felt252_add(v8, v9)
End:
  Return(v16)

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

//! > Test match with or pattern on felt252

//! > test_runner_name
test_function_lowering(expect_diagnostics: false)

//! > function_code
fn foo(a: felt252) -> felt252 {
    match a {
        0 | 1 => 11,
        2 | 3 => 12,
        4 | _ => 13,
    }
}

//! > function_name
foo

//! > module_code
struct P {
    x: felt252,
    y: felt252,
    z: felt252,
    w: felt252,
}
enum MyEnum {
    A: felt252,
    B: (felt252, felt252),
    C: (felt252, felt252, felt252),
    D: P,
}

//! > semantic_diagnostics

//! > lowering_diagnostics

//! > lowering_flat
Parameters: v0: core::felt252
blk0 (root):
Statements:
End:
  Match(match core::felt252_is_zero(v0) {
    IsZeroResult::Zero => blk1,
    IsZeroResult::NonZero(v1) => blk2,
  })

blk1:
Statements:
End:
  Goto(blk4, {})

blk2:
Statements:
  (v2: core::felt252) <- 1
  (v3: core::felt252) <- core::felt252_sub(v0, v2)
End:
  Match(match core::felt252_is_zero(v3) {
    IsZeroResult::Zero => blk3,
    IsZeroResult::NonZero(v4) => blk5,
  })

blk3:
Statements:
End:
  Goto(blk4, {})

blk4:
Statements:
  (v5: core::felt252) <- 11
End:
  Return(v5)

blk5:
Statements:
  (v6: core::felt252) <- 2
  (v7: core::felt252) <- core::felt252_sub(v0, v6)
End:
  Match(match core::felt252_is_zero(v7) {
    IsZeroResult::Zero => blk6,
    IsZeroResult::NonZero(v8) => blk7,
  })

blk6:
Statements:
End:
  Goto(blk9, {})

blk7:
Statements:
  (v9: core::felt252) <- 3
  (v10: core::felt252) <- core::felt252_sub(v0, v9)
End:
  Match(match core::felt252_is_zero(v10) {
    IsZeroResult::Zero => blk8,
    IsZeroResult::NonZero(v11) => blk10,
  })

blk8:
Statements:
End:
  Goto(blk9, {})

blk9:
Statements:
  (v12: core::felt252) <- 12
End:
  Return(v12)

blk10:
Statements:
  (v13: core::felt252) <- 13
End:
  Return(v13)

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

//! > Test match on enum tuples.

//! > test_runner_name
test_function_lowering(expect_diagnostics: false)

//! > function_code
fn foo(a: A, b: A) -> felt252 {
    let x = (@a, b);
    let y = @x;
    match y {
        (A::Two((t, _)), A::One(_)) => **t + 3,
        (A::Two(_), _) => 2,
        (A::One(_), A::One(_)) => 1,
        (_, A::Three) => 3,
        (_, _) => 6,
    }
}

//! > function_name
foo

//! > module_code
#[derive(Copy, Drop)]
enum A {
    One: felt252,
    Two: (felt252, felt252),
    Three: (),
}

//! > semantic_diagnostics

//! > lowering_diagnostics

//! > lowering_flat
Parameters: v0: test::A, v1: test::A
blk0 (root):
Statements:
  (v2: test::A, v3: @test::A) <- snapshot(v0)
  (v4: (@test::A, test::A)) <- struct_construct(v3, v1)
  (v5: (@test::A, test::A), v6: @(@test::A, test::A)) <- snapshot(v4)
  (v7: @@test::A, v8: @test::A) <- struct_destructure(v6)
End:
  Match(match_enum(v7) {
    A::One(v9) => blk1,
    A::Two(v10) => blk5,
    A::Three(v11) => blk10,
  })

blk1:
Statements:
End:
  Match(match_enum(v8) {
    A::One(v12) => blk2,
    A::Two(v13) => blk3,
    A::Three(v14) => blk4,
  })

blk2:
Statements:
  (v15: core::felt252) <- 1
End:
  Return(v15)

blk3:
Statements:
End:
  Goto(blk13, {})

blk4:
Statements:
End:
  Goto(blk15, {})

blk5:
Statements:
End:
  Match(match_enum(v8) {
    A::One(v16) => blk6,
    A::Two(v17) => blk7,
    A::Three(v18) => blk8,
  })

blk6:
Statements:
  (v19: @@core::felt252, v20: @@core::felt252) <- struct_destructure(v10)
  (v21: @core::felt252) <- desnap(v19)
  (v22: core::felt252) <- desnap(v21)
  (v23: core::felt252) <- 3
  (v24: core::felt252) <- core::felt252_add(v22, v23)
End:
  Return(v24)

blk7:
Statements:
End:
  Goto(blk9, {})

blk8:
Statements:
End:
  Goto(blk9, {})

blk9:
Statements:
  (v25: core::felt252) <- 2
End:
  Return(v25)

blk10:
Statements:
End:
  Match(match_enum(v8) {
    A::One(v26) => blk11,
    A::Two(v27) => blk12,
    A::Three(v28) => blk14,
  })

blk11:
Statements:
End:
  Goto(blk13, {})

blk12:
Statements:
End:
  Goto(blk13, {})

blk13:
Statements:
  (v29: core::felt252) <- 6
End:
  Return(v29)

blk14:
Statements:
End:
  Goto(blk15, {})

blk15:
Statements:
  (v30: core::felt252) <- 3
End:
  Return(v30)

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

//! > Test match on enum tuples missing arms.

//! > test_runner_name
test_function_lowering(expect_diagnostics: true)

//! > function_code
fn foo(a: A, b: A) -> felt252 {
    match (a, b) {
        (A::Two(_), A::One(_)) => 5,
        (A::Two(_), _) => 2,
        (A::One(_), A::One(_)) => 1,
        (_, A::Three) => 3,
        (_, A::Four) => 4,
    }
}

//! > function_name
foo

//! > module_code
#[derive(Copy, Drop)]
enum A {
    One: felt252,
    Two: (felt252, felt252),
    Three: (),
    Four: (),
}

//! > semantic_diagnostics

//! > lowering_diagnostics
error[E3004]: Match is non-exhaustive: `(One(_), Two(_))` not covered.
 --> lib.cairo:9:5-15:5
      match (a, b) {
 _____^
| ...
|     }
|_____^

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

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

//! > Test match on enum tuples with inner tuples.

//! > test_runner_name
test_function_lowering(expect_diagnostics: false)

//! > function_code
fn foo(a: A, b: A) -> felt252 {
    match (a, (a, b)) {
        (A::Two(_), (A::One(_), A::One(_))) => 8,
        _ => 4,
    }
}

//! > function_name
foo

//! > module_code
#[derive(Copy, Drop)]
enum A {
    One: felt252,
    Two: (felt252, felt252),
    Three: (),
    Four: (),
}

//! > semantic_diagnostics

//! > lowering_diagnostics

//! > lowering_flat
Parameters: v0: test::A, v1: test::A
blk0 (root):
Statements:
End:
  Match(match_enum(v0) {
    A::One(v2) => blk1,
    A::Two(v3) => blk2,
    A::Three(v4) => blk11,
    A::Four(v5) => blk12,
  })

blk1:
Statements:
End:
  Goto(blk13, {})

blk2:
Statements:
End:
  Match(match_enum(v0) {
    A::One(v6) => blk3,
    A::Two(v7) => blk8,
    A::Three(v8) => blk9,
    A::Four(v9) => blk10,
  })

blk3:
Statements:
End:
  Match(match_enum(v1) {
    A::One(v10) => blk4,
    A::Two(v11) => blk5,
    A::Three(v12) => blk6,
    A::Four(v13) => blk7,
  })

blk4:
Statements:
  (v14: core::felt252) <- 8
End:
  Return(v14)

blk5:
Statements:
End:
  Goto(blk13, {})

blk6:
Statements:
End:
  Goto(blk13, {})

blk7:
Statements:
End:
  Goto(blk13, {})

blk8:
Statements:
End:
  Goto(blk13, {})

blk9:
Statements:
End:
  Goto(blk13, {})

blk10:
Statements:
End:
  Goto(blk13, {})

blk11:
Statements:
End:
  Goto(blk13, {})

blk12:
Statements:
End:
  Goto(blk13, {})

blk13:
Statements:
  (v15: core::felt252) <- 4
End:
  Return(v15)

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

//! > Test match on enum tuples extern.

//! > test_runner_name
test_function_lowering(expect_diagnostics: false)

//! > function_code
fn foo(a: A) -> felt252 {
    match (a, get_bool()) {
        (A::Two(_), true) => 5,
        (A::Two(_), _) => 2,
        (A::One(_), false) => 1,
        (_, _) => 6,
    }
}

//! > function_name
foo

//! > module_code
enum A {
    One: felt252,
    Two: (felt252, felt252),
    Three: (),
    Four: (),
}
extern fn get_bool() -> bool nopanic;

//! > semantic_diagnostics

//! > lowering_diagnostics

//! > lowering_flat
Parameters: v0: test::A
blk0 (root):
Statements:
End:
  Match(match test::get_bool() {
    bool::False => blk1,
    bool::True => blk2,
  })

blk1:
Statements:
  (v1: ()) <- struct_construct()
  (v2: core::bool) <- bool::False(v1)
End:
  Goto(blk3, {v2 -> v3})

blk2:
Statements:
  (v4: ()) <- struct_construct()
  (v5: core::bool) <- bool::True(v4)
End:
  Goto(blk3, {v5 -> v3})

blk3:
Statements:
End:
  Match(match_enum(v0) {
    A::One(v6) => blk4,
    A::Two(v7) => blk7,
    A::Three(v8) => blk10,
    A::Four(v9) => blk11,
  })

blk4:
Statements:
End:
  Match(match_enum(v3) {
    bool::False(v10) => blk5,
    bool::True(v11) => blk6,
  })

blk5:
Statements:
  (v12: core::felt252) <- 1
End:
  Return(v12)

blk6:
Statements:
End:
  Goto(blk12, {})

blk7:
Statements:
End:
  Match(match_enum(v3) {
    bool::False(v13) => blk8,
    bool::True(v14) => blk9,
  })

blk8:
Statements:
  (v15: core::felt252) <- 2
End:
  Return(v15)

blk9:
Statements:
  (v16: core::felt252) <- 5
End:
  Return(v16)

blk10:
Statements:
End:
  Goto(blk12, {})

blk11:
Statements:
End:
  Goto(blk12, {})

blk12:
Statements:
  (v17: core::felt252) <- 6
End:
  Return(v17)

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

//! > Test u256 match

//! > test_runner_name
test_function_lowering(expect_diagnostics: false)

//! > function_code
fn foo() -> felt252 {
    match 5_u256 {
        0 => 1,
        _ => 2,
    }
}

//! > function_name
foo

//! > semantic_diagnostics

//! > lowering_diagnostics

//! > lowering_flat
Parameters:
blk0 (root):
Statements:
  (v0: core::felt252) <- 2
End:
  Return(v0)

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

//! > Test match ints optimization.

//! > test_runner_name
test_function_lowering(expect_diagnostics: false)

//! > function_code
fn foo(v: u32) -> felt252 {
    match v {
        0 => 1,
        1 => 2,
        2 => 3,
        3 => 4,
        4 => 5,
        5 => 6,
        6 => 7,
        _ => 8,
    }
}

//! > function_name
foo

//! > semantic_diagnostics

//! > lowering_diagnostics

//! > lowering_flat
Parameters: v0: core::RangeCheck, v1: core::integer::u32
blk0 (root):
Statements:
End:
  Match(match core::internal::bounded_int::downcast::<core::integer::u32, core::internal::bounded_int::BoundedInt::<0, 6>>(v0, v1) {
    Option::Some(v2, v3) => blk1,
    Option::None(v4) => blk9,
  })

blk1:
Statements:
End:
  Match(match_enum.(v3) {
    0(v5) => blk2,
    1(v6) => blk3,
    2(v7) => blk4,
    3(v8) => blk5,
    4(v9) => blk6,
    5(v10) => blk7,
    6(v11) => blk8,
  })

blk2:
Statements:
  (v12: core::felt252) <- 1
End:
  Return(v2, v12)

blk3:
Statements:
  (v13: core::felt252) <- 2
End:
  Return(v2, v13)

blk4:
Statements:
  (v14: core::felt252) <- 3
End:
  Return(v2, v14)

blk5:
Statements:
  (v15: core::felt252) <- 4
End:
  Return(v2, v15)

blk6:
Statements:
  (v16: core::felt252) <- 5
End:
  Return(v2, v16)

blk7:
Statements:
  (v17: core::felt252) <- 6
End:
  Return(v2, v17)

blk8:
Statements:
  (v18: core::felt252) <- 7
End:
  Return(v2, v18)

blk9:
Statements:
  (v19: core::felt252) <- 8
End:
  Return(v4, v19)

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

//! > Test double Otherwise arm.

//! > test_runner_name
test_function_lowering(expect_diagnostics: true)

//! > function_code
fn foo(a: A) -> felt252 {
    match a {
        A::Two(_) => 2,
        A::One(_) => 1,
        _ => 0,
        _ => 5,
    }
}

//! > function_name
foo

//! > module_code
enum A {
    One: (),
    Two: (),
    Three: (),
    Four: (),
}

//! > semantic_diagnostics

//! > lowering_diagnostics
warning[E3004]: Unreachable pattern arm.
 --> lib.cairo:12:14
        _ => 5,
             ^

//! > lowering_flat
Parameters: v0: test::A
blk0 (root):
Statements:
End:
  Match(match_enum(v0) {
    A::One(v1) => blk1,
    A::Two(v2) => blk2,
    A::Three(v3) => blk3,
    A::Four(v4) => blk4,
  })

blk1:
Statements:
  (v5: core::felt252) <- 1
End:
  Return(v5)

blk2:
Statements:
  (v6: core::felt252) <- 2
End:
  Return(v6)

blk3:
Statements:
End:
  Goto(blk5, {})

blk4:
Statements:
End:
  Goto(blk5, {})

blk5:
Statements:
  (v7: core::felt252) <- 0
End:
  Return(v7)

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

//! > Test hiding arms.

//! > test_runner_name
test_function_lowering(expect_diagnostics: true)

//! > function_code
fn foo(a: A) -> felt252 {
    match a {
        A::Two(_) => 2,
        A::One(_) => 1,
        _ => 0,
        A::One(_) => 5,
    }
}

//! > function_name
foo

//! > module_code
enum A {
    One: (),
    Two: (),
    Three: (),
    Four: (),
}

//! > semantic_diagnostics

//! > lowering_diagnostics
warning[E3004]: Unreachable pattern arm.
 --> lib.cairo:12:22
        A::One(_) => 5,
                     ^

//! > lowering_flat
Parameters: v0: test::A
blk0 (root):
Statements:
End:
  Match(match_enum(v0) {
    A::One(v1) => blk1,
    A::Two(v2) => blk2,
    A::Three(v3) => blk3,
    A::Four(v4) => blk4,
  })

blk1:
Statements:
  (v5: core::felt252) <- 1
End:
  Return(v5)

blk2:
Statements:
  (v6: core::felt252) <- 2
End:
  Return(v6)

blk3:
Statements:
End:
  Goto(blk5, {})

blk4:
Statements:
End:
  Goto(blk5, {})

blk5:
Statements:
  (v7: core::felt252) <- 0
End:
  Return(v7)

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

//! > Test Match Tuple with Enum with Tuple with Enum and variable use.

//! > test_runner_name
test_function_lowering(expect_diagnostics: false)

//! > function_code
fn foo(a: A, b: A) -> felt252 {
    match (a, b) {
        (A::Two((t, _)), A::One(_)) => t + 3,
        (A::Two(_), _) => 2,
        (A::One(_), A::One(_)) => 1,
        (_, A::Three(((_, B::One(x)), _))) => x,
        (_, A::Three(((_, _), x))) => x,
        (_, _) => 6,
    }
}

//! > function_name
foo

//! > module_code
#[derive(Copy, Drop)]
enum A {
    One: felt252,
    Two: (felt252, felt252),
    Three: ((felt252, B), felt252),
    Four: (felt252, felt252, felt252, felt252),
}

#[derive(Copy, Drop)]
enum B {
    One: felt252,
    Two: (felt252, felt252),
}

//! > semantic_diagnostics

//! > lowering_diagnostics

//! > lowering_flat
Parameters: v0: test::A, v1: test::A
blk0 (root):
Statements:
End:
  Match(match_enum(v0) {
    A::One(v2) => blk1,
    A::Two(v3) => blk8,
    A::Three(v4) => blk14,
    A::Four(v5) => blk15,
  })

blk1:
Statements:
End:
  Match(match_enum(v1) {
    A::One(v6) => blk2,
    A::Two(v7) => blk3,
    A::Three(v8) => blk4,
    A::Four(v9) => blk7,
  })

blk2:
Statements:
  (v10: core::felt252) <- 1
End:
  Return(v10)

blk3:
Statements:
End:
  Goto(blk23, {})

blk4:
Statements:
  (v11: (core::felt252, test::B), v12: core::felt252) <- struct_destructure(v8)
  (v13: core::felt252, v14: test::B) <- struct_destructure(v11)
End:
  Match(match_enum(v14) {
    B::One(v15) => blk5,
    B::Two(v16) => blk6,
  })

blk5:
Statements:
End:
  Return(v15)

blk6:
Statements:
End:
  Return(v12)

blk7:
Statements:
End:
  Goto(blk23, {})

blk8:
Statements:
End:
  Match(match_enum(v1) {
    A::One(v17) => blk9,
    A::Two(v18) => blk10,
    A::Three(v19) => blk11,
    A::Four(v20) => blk12,
  })

blk9:
Statements:
  (v21: core::felt252, v22: core::felt252) <- struct_destructure(v3)
  (v23: core::felt252) <- 3
  (v24: core::felt252) <- core::felt252_add(v21, v23)
End:
  Return(v24)

blk10:
Statements:
End:
  Goto(blk13, {})

blk11:
Statements:
End:
  Goto(blk13, {})

blk12:
Statements:
End:
  Goto(blk13, {})

blk13:
Statements:
  (v25: core::felt252) <- 2
End:
  Return(v25)

blk14:
Statements:
End:
  Goto(blk16, {})

blk15:
Statements:
End:
  Goto(blk16, {})

blk16:
Statements:
End:
  Match(match_enum(v1) {
    A::One(v26) => blk17,
    A::Two(v27) => blk18,
    A::Three(v28) => blk19,
    A::Four(v29) => blk22,
  })

blk17:
Statements:
End:
  Goto(blk23, {})

blk18:
Statements:
End:
  Goto(blk23, {})

blk19:
Statements:
  (v30: (core::felt252, test::B), v31: core::felt252) <- struct_destructure(v28)
  (v32: core::felt252, v33: test::B) <- struct_destructure(v30)
End:
  Match(match_enum(v33) {
    B::One(v34) => blk20,
    B::Two(v35) => blk21,
  })

blk20:
Statements:
End:
  Return(v34)

blk21:
Statements:
End:
  Return(v31)

blk22:
Statements:
End:
  Goto(blk23, {})

blk23:
Statements:
  (v36: core::felt252) <- 6
End:
  Return(v36)

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

//! > Test Match Enum with inner triple Tuple and variable use.

//! > test_runner_name
test_function_lowering(expect_diagnostics: false)

//! > function_code
fn foo(a: A) -> felt252 {
    match a {
        A::Two(((_, (t,)), _)) => t + 3,
        _ => 6,
    }
}

//! > function_name
foo

//! > module_code
#[derive(Copy, Drop)]
enum A {
    One: felt252,
    Two: ((felt252, (felt252,)), felt252),
    Three: ((felt252, B), felt252),
    Four: (felt252, felt252, felt252, felt252),
}

#[derive(Copy, Drop)]
enum B {
    One: felt252,
    Two: (felt252, felt252),
}

//! > semantic_diagnostics

//! > lowering_diagnostics

//! > lowering_flat
Parameters: v0: test::A
blk0 (root):
Statements:
End:
  Match(match_enum(v0) {
    A::One(v1) => blk1,
    A::Two(v2) => blk2,
    A::Three(v3) => blk3,
    A::Four(v4) => blk4,
  })

blk1:
Statements:
End:
  Goto(blk5, {})

blk2:
Statements:
  (v5: (core::felt252, (core::felt252,)), v6: core::felt252) <- struct_destructure(v2)
  (v7: core::felt252, v8: (core::felt252,)) <- struct_destructure(v5)
  (v9: core::felt252) <- struct_destructure(v8)
  (v10: core::felt252) <- 3
  (v11: core::felt252) <- core::felt252_add(v9, v10)
End:
  Return(v11)

blk3:
Statements:
End:
  Goto(blk5, {})

blk4:
Statements:
End:
  Goto(blk5, {})

blk5:
Statements:
  (v12: core::felt252) <- 6
End:
  Return(v12)

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

//! > Test Match Enum with inner triple Tuple with inner Enum and variable use.

//! > test_runner_name
test_function_lowering(expect_diagnostics: false)

//! > function_code
fn foo(a: A) -> felt252 {
    match a {
        A::Three(((_, (B::One(t),)), _)) => t + 3,
        _ => 6,
    }
}

//! > function_name
foo

//! > module_code
#[derive(Copy, Drop)]
enum A {
    One: felt252,
    Two: (felt252, felt252),
    Three: ((felt252, (B,)), felt252),
    Four: (felt252, felt252, felt252, felt252),
}

#[derive(Copy, Drop)]
enum B {
    One: felt252,
    Two: (felt252, felt252),
}

//! > semantic_diagnostics

//! > lowering_diagnostics

//! > lowering_flat
Parameters: v0: test::A
blk0 (root):
Statements:
End:
  Match(match_enum(v0) {
    A::One(v1) => blk1,
    A::Two(v2) => blk2,
    A::Three(v3) => blk3,
    A::Four(v4) => blk6,
  })

blk1:
Statements:
End:
  Goto(blk7, {})

blk2:
Statements:
End:
  Goto(blk7, {})

blk3:
Statements:
  (v5: (core::felt252, (test::B,)), v6: core::felt252) <- struct_destructure(v3)
  (v7: core::felt252, v8: (test::B,)) <- struct_destructure(v5)
  (v9: test::B) <- struct_destructure(v8)
End:
  Match(match_enum(v9) {
    B::One(v10) => blk4,
    B::Two(v11) => blk5,
  })

blk4:
Statements:
  (v12: core::felt252) <- 3
  (v13: core::felt252) <- core::felt252_add(v10, v12)
End:
  Return(v13)

blk5:
Statements:
End:
  Goto(blk7, {})

blk6:
Statements:
End:
  Goto(blk7, {})

blk7:
Statements:
  (v14: core::felt252) <- 6
End:
  Return(v14)

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

//! > Test Match triple Tuple and variable use.

//! > test_runner_name
test_function_lowering(expect_diagnostics: false)

//! > function_code
fn foo(a: ((felt252, (A,)), felt252)) -> felt252 {
    match a {
        ((_, (A::One(t),)), _) => t + 3,
        _ => 6,
    }
}

//! > function_name
foo

//! > module_code
#[derive(Copy, Drop)]
enum A {
    One: felt252,
    Two: (felt252, felt252),
    Three: ((felt252, (B,)), felt252),
    Four: (felt252, felt252, felt252, felt252),
}

#[derive(Copy, Drop)]
enum B {
    One: felt252,
    Two: (felt252, felt252),
}

//! > semantic_diagnostics

//! > lowering_diagnostics

//! > lowering_flat
Parameters: v0: ((core::felt252, (test::A,)), core::felt252)
blk0 (root):
Statements:
  (v1: (core::felt252, (test::A,)), v2: core::felt252) <- struct_destructure(v0)
  (v3: core::felt252, v4: (test::A,)) <- struct_destructure(v1)
  (v5: test::A) <- struct_destructure(v4)
End:
  Match(match_enum(v5) {
    A::One(v6) => blk1,
    A::Two(v7) => blk2,
    A::Three(v8) => blk3,
    A::Four(v9) => blk4,
  })

blk1:
Statements:
  (v10: core::felt252) <- 3
  (v11: core::felt252) <- core::felt252_add(v6, v10)
End:
  Return(v11)

blk2:
Statements:
End:
  Goto(blk5, {})

blk3:
Statements:
End:
  Goto(blk5, {})

blk4:
Statements:
End:
  Goto(blk5, {})

blk5:
Statements:
  (v12: core::felt252) <- 6
End:
  Return(v12)

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

//! > Test match unreachable Otherwise.

//! > test_runner_name
test_function_lowering(expect_diagnostics: true)

//! > function_code
fn foo(a: Option<felt252>) -> felt252 {
    match a {
        Some(_) => 5,
        None => 6,
        _ => 7,
    }
}

//! > function_name
foo

//! > semantic_diagnostics

//! > lowering_diagnostics
warning[E3004]: Unreachable pattern arm.
 --> lib.cairo:5:14
        _ => 7,
             ^

//! > lowering_flat
Parameters: v0: core::option::Option::<core::felt252>
blk0 (root):
Statements:
End:
  Match(match_enum(v0) {
    Option::Some(v1) => blk1,
    Option::None(v2) => blk2,
  })

blk1:
Statements:
  (v3: core::felt252) <- 5
End:
  Return(v3)

blk2:
Statements:
  (v4: core::felt252) <- 6
End:
  Return(v4)

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

//! > Test lower match missing args.

//! > test_runner_name
test_function_lowering(expect_diagnostics: true)

//! > function_code
fn foo(a: felt252) -> felt252 {
    match Some(a) {
        Some => 2,
        _ => 0,
    }
}

//! > function_name
foo

//! > semantic_diagnostics
warning[E2192]: Pattern missing subpattern for the payload of variant. Consider using `Some(_)`
 --> lib.cairo:3:9
        Some => 2,
        ^^^^

//! > lowering_diagnostics

//! > lowering_flat
Parameters: v0: core::felt252
blk0 (root):
Statements:
  (v1: core::felt252) <- 2
End:
  Return(v1)

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

//! > Test lower match with _ args.

//! > test_runner_name
test_function_lowering(expect_diagnostics: false)

//! > function_code
fn foo(a: felt252) -> felt252 {
    match Some(a) {
        Some(_) => 2,
        _ => 0,
    }
}

//! > function_name
foo

//! > semantic_diagnostics

//! > lowering_diagnostics

//! > lowering_flat
Parameters: v0: core::felt252
blk0 (root):
Statements:
  (v1: core::felt252) <- 2
End:
  Return(v1)

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

//! > Test empty enum match on empty enum with otherwise.

//! > test_runner_name
test_function_lowering(expect_diagnostics: false)

//! > function_code
fn foo(e: EmptyEnum) -> felt252 {
    match e {
        _ => { 1 },
    }
}

fn bar(e: Option<EmptyEnum>) -> felt252 {
    if let Some(e) = e {
        foo(e)
    } else {
        0
    }
}

//! > function_name
bar

//! > module_code
#[derive(Copy, Drop)]
enum EmptyEnum {}

//! > semantic_diagnostics

//! > lowering_diagnostics

//! > lowering_flat
Parameters: v0: core::option::Option::<test::EmptyEnum>
blk0 (root):
Statements:
End:
  Match(match_enum(v0) {
    Option::Some(v1) => blk1,
    Option::None(v2) => blk2,
  })

blk1:
Statements:
End:
  Match(match_enum(v1) {
  })

blk2:
Statements:
  (v3: core::felt252) <- 0
End:
  Return(v3)

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

//! > Match with complex patterns and don't double report errors.

//! > test_runner_name
test_function_lowering(expect_diagnostics: true)

//! > function_code
fn foo(a: Option<Option<A>>) -> felt252 {
    match a {
        Some(Some(A::One)) => 3,
        // Creates two `Full` nodes in variant tree.
        Some(Some(_)) => 2,
        None(_) => 1,
    }
}

//! > function_name
foo

//! > module_code
enum A {
    One: (),
    Two: (),
    Three: (),
}

//! > semantic_diagnostics

//! > lowering_diagnostics
error[E3004]: Match is non-exhaustive: `Some(None(_))` not covered.
 --> lib.cairo:7:5-12:5
      match a {
 _____^
| ...
|     }
|_____^

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

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

//! > Match with complex patterns and no other diagnostics.

//! > test_runner_name
test_function_lowering(expect_diagnostics: false)

//! > function_code
fn foo(a: Option<Option<A>>) -> felt252 {
    match a {
        Some(Some(A::One)) => 3,
        // Creates two patterns in variant tree.
        Some(Some(_)) => 2,
        Some(None) => 4,
        None(_) => 1,
    }
}

//! > function_name
foo

//! > module_code
enum A {
    One: (),
    Two: (),
    Three: (),
}

//! > semantic_diagnostics

//! > lowering_diagnostics

//! > lowering_flat
Parameters: v0: core::option::Option::<core::option::Option::<test::A>>
blk0 (root):
Statements:
End:
  Match(match_enum(v0) {
    Option::Some(v1) => blk1,
    Option::None(v2) => blk8,
  })

blk1:
Statements:
End:
  Match(match_enum(v1) {
    Option::Some(v3) => blk2,
    Option::None(v4) => blk7,
  })

blk2:
Statements:
End:
  Match(match_enum(v3) {
    A::One(v5) => blk3,
    A::Two(v6) => blk4,
    A::Three(v7) => blk5,
  })

blk3:
Statements:
  (v8: core::felt252) <- 3
End:
  Return(v8)

blk4:
Statements:
End:
  Goto(blk6, {})

blk5:
Statements:
End:
  Goto(blk6, {})

blk6:
Statements:
  (v9: core::felt252) <- 2
End:
  Return(v9)

blk7:
Statements:
  (v10: core::felt252) <- 4
End:
  Return(v10)

blk8:
Statements:
  (v11: core::felt252) <- 1
End:
  Return(v11)

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

//! > Match on enum variants and bind vars from different variants.

//! > test_runner_name
test_function_lowering(expect_diagnostics: false)

//! > function_code
fn foo(c: C) -> felt252 {
    match c {
        C::One(B::One(A::Two(x))) | C::One(B::One(A::One(x))) => x + x,
    }
}

//! > function_name
foo

//! > module_code
enum A {
    One: felt252,
    Two: felt252,
}

enum B {
    One: A,
}

enum C {
    One: B,
}

//! > semantic_diagnostics

//! > lowering_diagnostics

//! > lowering_flat
Parameters: v0: test::C
blk0 (root):
Statements:
End:
  Match(match_enum(v0) {
    C::One(v1) => blk1,
  })

blk1:
Statements:
End:
  Match(match_enum(v1) {
    B::One(v2) => blk2,
  })

blk2:
Statements:
End:
  Match(match_enum(v2) {
    A::One(v3) => blk3,
    A::Two(v4) => blk4,
  })

blk3:
Statements:
End:
  Goto(blk5, {v3 -> v5})

blk4:
Statements:
End:
  Goto(blk5, {v4 -> v5})

blk5:
Statements:
  (v6: core::felt252) <- core::felt252_add(v5, v5)
End:
  Return(v6)

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

//! > Match on 3 level enum variants with a pattern binding.

//! > test_runner_name
test_function_lowering(expect_diagnostics: false)

//! > function_code
fn foo(a: A) -> felt252 {
    match a {
        Ok(Ok(Ok(x))) => x,
        Ok(Ok(Err(x))) | Err(Err(Err(x))) | Ok(Err(Ok(x))) | Err(Ok(Ok(x))) => x + x,
        Err(Ok(Err(x))) | Ok(Err(Err(x))) | Err(Err(Ok(x))) => x * x,
    }
}

//! > function_name
foo

//! > module_code
type A = Result<B, B>;
type B = Result<C, C>;
type C = Result<felt252, felt252>;

//! > semantic_diagnostics

//! > lowering_diagnostics

//! > lowering_flat
Parameters: v0: core::result::Result::<core::result::Result::<core::result::Result::<core::felt252, core::felt252>, core::result::Result::<core::felt252, core::felt252>>, core::result::Result::<core::result::Result::<core::felt252, core::felt252>, core::result::Result::<core::felt252, core::felt252>>>
blk0 (root):
Statements:
End:
  Match(match_enum(v0) {
    Result::Ok(v1) => blk1,
    Result::Err(v2) => blk8,
  })

blk1:
Statements:
End:
  Match(match_enum(v1) {
    Result::Ok(v3) => blk2,
    Result::Err(v4) => blk5,
  })

blk2:
Statements:
End:
  Match(match_enum(v3) {
    Result::Ok(v5) => blk3,
    Result::Err(v6) => blk4,
  })

blk3:
Statements:
End:
  Return(v5)

blk4:
Statements:
End:
  Goto(blk16, {v6 -> v7})

blk5:
Statements:
End:
  Match(match_enum(v4) {
    Result::Ok(v8) => blk6,
    Result::Err(v9) => blk7,
  })

blk6:
Statements:
End:
  Goto(blk16, {v8 -> v7})

blk7:
Statements:
End:
  Goto(blk14, {v9 -> v10})

blk8:
Statements:
End:
  Match(match_enum(v2) {
    Result::Ok(v11) => blk9,
    Result::Err(v12) => blk12,
  })

blk9:
Statements:
End:
  Match(match_enum(v11) {
    Result::Ok(v13) => blk10,
    Result::Err(v14) => blk11,
  })

blk10:
Statements:
End:
  Goto(blk16, {v13 -> v7})

blk11:
Statements:
End:
  Goto(blk14, {v14 -> v10})

blk12:
Statements:
End:
  Match(match_enum(v12) {
    Result::Ok(v15) => blk13,
    Result::Err(v16) => blk15,
  })

blk13:
Statements:
End:
  Goto(blk14, {v15 -> v10})

blk14:
Statements:
  (v17: core::felt252) <- core::felt252_mul(v10, v10)
End:
  Return(v17)

blk15:
Statements:
End:
  Goto(blk16, {v16 -> v7})

blk16:
Statements:
  (v18: core::felt252) <- core::felt252_add(v7, v7)
End:
  Return(v18)

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

//! > Match on 3 level enum variants with a missing pattern on variant in bottom type.

//! > test_runner_name
test_function_lowering(expect_diagnostics: true)

//! > function_code
fn foo(a: A) -> felt252 {
    match a {
        // Ok(Ok(Ok(()))) => 1,
        Ok(Ok(Err(()))) => 2,
        Ok(Err(Ok(()))) => 3,
        Ok(Err(Err(()))) => 4,
        Err(Ok(Ok(()))) => 5,
        Err(Ok(Err(()))) => 6,
        Err(Err(Ok(()))) => 7,
        Err(Err(Err(()))) => 8,
    }
}

//! > function_name
foo

//! > module_code
type A = Result<B, B>;
type B = Result<C, C>;
type C = Result<(), ()>;

//! > semantic_diagnostics

//! > lowering_diagnostics
error[E3004]: Match is non-exhaustive: `Ok(Ok(Ok(_)))` not covered.
 --> lib.cairo:5:5-14:5
      match a {
 _____^
| ...
|     }
|_____^

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

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

//! > Match on 3 level enum variants with a missing pattern on variant in middle type.

//! > test_runner_name
test_function_lowering(expect_diagnostics: true)

//! > function_code
fn foo(a: A) -> felt252 {
    match a {
        Ok(Ok(Ok(()))) => 1,
        Ok(Ok(Err(()))) => 2,
        // Ok(Err(Ok(()))) => 3,
        // Ok(Err(Err(()))) => 4,
        Err(Ok(Ok(()))) => 5,
        Err(Ok(Err(()))) => 6,
        Err(Err(Ok(()))) => 7,
        Err(Err(Err(()))) => 8,
    }
}

//! > function_name
foo

//! > module_code
type A = Result<B, B>;
type B = Result<C, C>;
type C = Result<(), ()>;

//! > semantic_diagnostics

//! > lowering_diagnostics
error[E3004]: Match is non-exhaustive: `Ok(Err(_))` not covered.
 --> lib.cairo:5:5-14:5
      match a {
 _____^
| ...
|     }
|_____^

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

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

//! > Match on 3 level enum variants with a missing pattern on variant in top type.

//! > test_runner_name
test_function_lowering(expect_diagnostics: true)

//! > function_code
fn foo(a: A) -> felt252 {
    match a {
        // Ok(Ok(Ok(()))) => 1,
        // Ok(Ok(Err(()))) => 2,
        // Ok(Err(Ok(()))) => 3,
        // Ok(Err(Err(()))) => 4,
        Err(Ok(Ok(()))) => 5,
        Err(Ok(Err(()))) => 6,
        Err(Err(Ok(()))) => 7,
        Err(Err(Err(()))) => 8,
    }
}

//! > function_name
foo

//! > module_code
type A = Result<B, B>;
type B = Result<C, C>;
type C = Result<(), ()>;

//! > semantic_diagnostics

//! > lowering_diagnostics
error[E3004]: Match is non-exhaustive: `Ok(_)` not covered.
 --> lib.cairo:5:5-14:5
      match a {
 _____^
| ...
|     }
|_____^

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

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

//! > Match on 3 level enum variants with a single variant.

//! > test_runner_name
test_function_lowering(expect_diagnostics: false)

//! > function_code
fn foo(c: C) -> felt252 {
    match c {
        C::One(B::One(A::One)) => 1,
    }
}

//! > function_name
foo

//! > module_code
#[derive(Drop)]
enum A {
    One: (),
}

#[derive(Drop)]
enum B {
    One: A,
}

#[derive(Drop)]
enum C {
    One: B,
}

//! > semantic_diagnostics

//! > lowering_diagnostics

//! > lowering_flat
Parameters: v0: test::C
blk0 (root):
Statements:
  (v1: core::felt252) <- 1
End:
  Return(v1)

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

//! > Match on enum variants and bind vars from different enum types.

//! > test_runner_name
test_function_lowering(expect_diagnostics: false)

//! > function_code
fn foo(c: C) -> felt252 {
    match c {
        C::One(B::One(A::One(x))) | C::One(B::Two(x)) => x + x,
    }
}

//! > function_name
foo

//! > module_code
enum A {
    One: felt252,
}

enum B {
    One: A,
    Two: felt252,
}

enum C {
    One: B,
}

//! > semantic_diagnostics

//! > lowering_diagnostics

//! > lowering_flat
Parameters: v0: test::C
blk0 (root):
Statements:
End:
  Match(match_enum(v0) {
    C::One(v1) => blk1,
  })

blk1:
Statements:
End:
  Match(match_enum(v1) {
    B::One(v2) => blk2,
    B::Two(v3) => blk4,
  })

blk2:
Statements:
End:
  Match(match_enum(v2) {
    A::One(v4) => blk3,
  })

blk3:
Statements:
End:
  Goto(blk5, {v4 -> v5})

blk4:
Statements:
End:
  Goto(blk5, {v3 -> v5})

blk5:
Statements:
  (v6: core::felt252) <- core::felt252_add(v5, v5)
End:
  Return(v6)

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

//! > Match on enum variants and bind vars from a tuple.

//! > test_runner_name
test_function_lowering(expect_diagnostics: false)

//! > function_code
fn foo(b: B) -> felt252 {
    match b {
        B::One(A::One((x, _))) => x,
    }
}

//! > function_name
foo

//! > module_code
enum A {
    One: (felt252, felt252),
}

enum B {
    One: A,
}

//! > semantic_diagnostics

//! > lowering_diagnostics

//! > lowering_flat
Parameters: v0: test::B
blk0 (root):
Statements:
End:
  Match(match_enum(v0) {
    B::One(v1) => blk1,
  })

blk1:
Statements:
End:
  Match(match_enum(v1) {
    A::One(v2) => blk2,
  })

blk2:
Statements:
  (v3: core::felt252, v4: core::felt252) <- struct_destructure(v2)
End:
  Return(v3)

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

//! > Match on enum with snapshots in types.

//! > test_runner_name
test_function_lowering(expect_diagnostics: false)

//! > function_code
fn foo(x: @B) -> felt252 {
    match x {
        B::Two(A::One(v)) => *****v,
    }
}

//! > function_name
foo

//! > module_code
enum A {
    One: @felt252,
}

enum B {
    Two: @@@A,
}

//! > semantic_diagnostics

//! > lowering_diagnostics

//! > lowering_flat
Parameters: v0: @test::B
blk0 (root):
Statements:
End:
  Match(match_enum(v0) {
    B::Two(v1) => blk1,
  })

blk1:
Statements:
End:
  Match(match_enum(v1) {
    A::One(v2) => blk2,
  })

blk2:
Statements:
  (v3: @@@@core::felt252) <- desnap(v2)
  (v4: @@@core::felt252) <- desnap(v3)
  (v5: @@core::felt252) <- desnap(v4)
  (v6: @core::felt252) <- desnap(v5)
  (v7: core::felt252) <- desnap(v6)
End:
  Return(v7)

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

//! > Test extern to inner match arm.

//! > test_runner_name
test_function_lowering(expect_diagnostics: false)

//! > function_code
fn foo() -> felt252 {
    match get_a() {
        A::One(Some(Some(v))) => v,
        _ => 3,
    }
}

//! > function_name
foo

//! > module_code
enum A {
    One: Option<Option<felt252>>,
}

extern fn get_a() -> A nopanic;

//! > semantic_diagnostics

//! > lowering_diagnostics

//! > lowering_flat
Parameters:
blk0 (root):
Statements:
End:
  Match(match test::get_a() {
    A::One(v0) => blk1,
  })

blk1:
Statements:
End:
  Match(match_enum(v0) {
    Option::Some(v1) => blk2,
    Option::None(v2) => blk5,
  })

blk2:
Statements:
End:
  Match(match_enum(v1) {
    Option::Some(v3) => blk3,
    Option::None(v4) => blk4,
  })

blk3:
Statements:
End:
  Return(v3)

blk4:
Statements:
End:
  Goto(blk6, {})

blk5:
Statements:
End:
  Goto(blk6, {})

blk6:
Statements:
  (v5: core::felt252) <- 3
End:
  Return(v5)

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

//! > Test extern to inner match arm with snapshots.

//! > test_runner_name
test_function_lowering(expect_diagnostics: false)

//! > function_code
fn foo() -> felt252 {
    match @get_a() {
        A::One(Some(Some(v))) => *****v,
        _ => 3,
    }
}

//! > function_name
foo

//! > module_code
#[derive(Drop)]
enum A {
    One: @Option<@@Option<@felt252>>,
}

extern fn get_a() -> A nopanic;

//! > semantic_diagnostics

//! > lowering_diagnostics

//! > lowering_flat
Parameters:
blk0 (root):
Statements:
End:
  Match(match test::get_a() {
    A::One(v0) => blk1,
  })

blk1:
Statements:
  (v1: @core::option::Option::<@@core::option::Option::<@core::felt252>>, v2: @@core::option::Option::<@@core::option::Option::<@core::felt252>>) <- snapshot(v0)
End:
  Match(match_enum(v2) {
    Option::Some(v3) => blk2,
    Option::None(v4) => blk5,
  })

blk2:
Statements:
End:
  Match(match_enum(v3) {
    Option::Some(v5) => blk3,
    Option::None(v6) => blk4,
  })

blk3:
Statements:
  (v7: @@@@core::felt252) <- desnap(v5)
  (v8: @@@core::felt252) <- desnap(v7)
  (v9: @@core::felt252) <- desnap(v8)
  (v10: @core::felt252) <- desnap(v9)
  (v11: core::felt252) <- desnap(v10)
End:
  Return(v11)

blk4:
Statements:
End:
  Goto(blk6, {})

blk5:
Statements:
End:
  Goto(blk6, {})

blk6:
Statements:
  (v12: core::felt252) <- 3
End:
  Return(v12)

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

//! > Test enum match after destruct disallowed.

//! > test_runner_name
test_function_lowering(expect_diagnostics: false)

//! > function_code
fn foo(x: Option<Option<A>>) -> felt252 {
    match x {
        Some(Some(A { opt: Some(v) })) => v,
        _ => 3,
    }
}

//! > function_name
foo

//! > module_code
#[derive(Drop)]
struct A {
    opt: Option<felt252>,
}

//! > semantic_diagnostics

//! > lowering_diagnostics

//! > lowering_flat
Parameters: v0: core::option::Option::<core::option::Option::<test::A>>
blk0 (root):
Statements:
End:
  Match(match_enum(v0) {
    Option::Some(v1) => blk1,
    Option::None(v2) => blk6,
  })

blk1:
Statements:
End:
  Match(match_enum(v1) {
    Option::Some(v3) => blk2,
    Option::None(v4) => blk5,
  })

blk2:
Statements:
  (v5: core::option::Option::<core::felt252>) <- struct_destructure(v3)
End:
  Match(match_enum(v5) {
    Option::Some(v6) => blk3,
    Option::None(v7) => blk4,
  })

blk3:
Statements:
End:
  Return(v6)

blk4:
Statements:
End:
  Goto(blk7, {})

blk5:
Statements:
End:
  Goto(blk7, {})

blk6:
Statements:
End:
  Goto(blk7, {})

blk7:
Statements:
  (v8: core::felt252) <- 3
End:
  Return(v8)

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

//! > Test value match after enum match.

//! > test_runner_name
test_function_lowering(expect_diagnostics: false)

//! > function_code
fn foo(x: Option<Option<felt252>>) -> felt252 {
    match x {
        Some(Some(0)) => 0,
        _ => 3,
    }
}

//! > function_name
foo

//! > module_code
#[derive(Drop)]
struct A {
    opt: Option<felt252>,
}

//! > semantic_diagnostics

//! > lowering_diagnostics

//! > lowering_flat
Parameters: v0: core::option::Option::<core::option::Option::<core::felt252>>
blk0 (root):
Statements:
End:
  Match(match_enum(v0) {
    Option::Some(v1) => blk1,
    Option::None(v2) => blk6,
  })

blk1:
Statements:
End:
  Match(match_enum(v1) {
    Option::Some(v3) => blk2,
    Option::None(v4) => blk5,
  })

blk2:
Statements:
End:
  Match(match core::felt252_is_zero(v3) {
    IsZeroResult::Zero => blk3,
    IsZeroResult::NonZero(v5) => blk4,
  })

blk3:
Statements:
  (v6: core::felt252) <- 0
End:
  Return(v6)

blk4:
Statements:
End:
  Goto(blk7, {})

blk5:
Statements:
End:
  Goto(blk7, {})

blk6:
Statements:
End:
  Goto(blk7, {})

blk7:
Statements:
  (v7: core::felt252) <- 3
End:
  Return(v7)

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

//! > Test lowering of empty extern enum.

//! > test_runner_name
test_function_lowering(expect_diagnostics: false)

//! > function_code
fn foo() -> felt252 {
    match get_a() {}
}

//! > function_name
foo

//! > module_code
enum A {}

extern fn get_a() -> A nopanic;

//! > semantic_diagnostics

//! > lowering_diagnostics

//! > lowering_flat
Parameters:
blk0 (root):
Statements:
End:
  Match(match test::get_a() {
  })