Struct SafeSub 

pub struct SafeSub;

Subtract two u32s and crash on overflow.

Behavior

BEFORE: _ [right: 32] [left: u32]
AFTER:  _ [left - right: u32]

Preconditions

• all input arguments are properly BFieldCodec encoded
• left is greater than or equal to right

Postconditions

• the output is properly BFieldCodec encoded

Implementations

impl SafeSub

pub const OVERFLOW_ERROR_ID: i128 = 470i128

Trait Implementations

impl BasicSnippet for SafeSub

fn inputs(&self) -> Vec<(DataType, String)>

fn outputs(&self) -> Vec<(DataType, String)>

fn entrypoint(&self) -> String

fn code(&self, _: &mut Library) -> Vec<LabelledInstruction>

fn sign_offs(&self) -> HashMap<Reviewer, SignOffFingerprint>

Contains an entry for every sign off.

fn annotated_code(&self, library: &mut Library) -> Vec<LabelledInstruction>

fn link_for_isolated_run(&self) -> Vec<LabelledInstruction>

fn init_stack_for_isolated_run(&self) -> Vec<BFieldElement>

Initial stack on program start, when the snippet runs in isolation.

fn stack_diff(&self) -> isize

impl Clone for SafeSub

fn clone(&self) -> SafeSub

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for SafeSub

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for SafeSub

fn default() -> SafeSub

Returns the “default value” for a type.

impl Hash for SafeSub

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq for SafeSub

fn eq(&self, other: &SafeSub) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Copy for SafeSub

impl Eq for SafeSub

impl StructuralPartialEq for SafeSub