Enum aluvm::isa::SplitFlag

pub enum SplitFlag {
    NoneNone,
    NoneNoneOnEmpty,
    NoneZeroOnEmpty,
    ZeroZeroOnEmpty,
    CutNone,
    CutZero,
    ZeroNone,
    ZeroZero,
}

Flags for bytestring split operation.

If offset exceeds the length of the string in the register, than the behaviour of crate::isa::BytesOp::Splt op code is defined by this flag. Please check its description for more details.

Variants

NoneNone

If the offset is equal to zero, exceeds or equal to the length of the source string sets first and second destination register to None; st0 to false.

Matches case (1) in crate::isa::BytesOp::Splt description

NoneNoneOnEmpty

If the offset is equal to zero, sets first destination register to None, second is set to None only if the string in the source register is empty; st0 in both cases is set to false.

Matches case (2) in crate::isa::BytesOp::Splt description

NoneZeroOnEmpty

If the offset is equal to zero, sets first destination register to None, second is set to an empty string if the string in the source register is empty; st0 in both cases is set to false.

Matches case (3) in crate::isa::BytesOp::Splt description

ZeroZeroOnEmpty

If the offset is equal to zero, sets first destination register to empty string, second is set to an empty string if the string in the source register is empty; st0 value remain unchanged.

Matches case (4) in crate::isa::BytesOp::Splt description

CutNone

If the offset exceeds the length of the source string sets the first destination register to the source string (<=offset in len) and second to None; st0 value is set to false.

Matches case (5) in crate::isa::BytesOp::Splt description

CutZero

If the offset exceeds the length of the source string sets the first destination register to the source string (<=offset in len) and second to zero-length string; st0 value is set to false.

Matches case (6) in crate::isa::BytesOp::Splt description

ZeroNone

If the offset exceeds the length of the source string sets the first destination register to zero-length string and second to None; st0 value is set to false.

Matches case (7) in crate::isa::BytesOp::Splt description

ZeroZero

If the offset exceeds the length of the source string sets both the first and second destination registers to zero-length string; st0 value is set to false.

Matches case (8) in crate::isa::BytesOp::Splt description

Implementations

impl SplitFlag

pub fn from_u3(val: u3) -> Self

Constructs split operation flag from u3 value (used in bytecode serialization)

pub fn as_u3(self) -> u3

Returns u3 representation of split operation flag (used in bytecode serialization).

Trait Implementations

impl Clone for SplitFlag

fn clone(&self) -> SplitFlag

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for SplitFlag

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

Formats the value using the given formatter.

impl Display for SplitFlag

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

Formats the value using the given formatter.

impl From<&'_ SplitFlag> for u3

fn from(flag: &SplitFlag) -> u3

Performs the conversion.

impl From<SplitFlag> for u3

fn from(flag: SplitFlag) -> u3

Performs the conversion.

impl From<u3> for SplitFlag

fn from(val: u3) -> Self

Performs the conversion.

impl FromStr for SplitFlag

type Err = ParseFlagError

The associated error which can be returned from parsing.

fn from_str(s: &str) -> Result<Self, Self::Err>

Parses a string s to return a value of this type.

impl Hash for SplitFlag

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, 

Feeds a slice of this type into the given Hasher.

impl Ord for SplitFlag

fn cmp(&self, other: &SplitFlag) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

Restrict a value to a certain interval.

impl PartialEq<SplitFlag> for SplitFlag

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

This method tests for self and other values to be equal, and is used by ==.

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

This method tests for !=.

impl PartialOrd<SplitFlag> for SplitFlag

fn partial_cmp(&self, other: &SplitFlag) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

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

This method tests less than (for self and other) and is used by the < operator.

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

This method tests less than or equal to (for self and other) and is used by the <= operator.

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

This method tests greater than (for self and other) and is used by the > operator.

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

This method tests greater than or equal to (for self and other) and is used by the >= operator.

impl Copy for SplitFlag

impl Eq for SplitFlag

impl StructuralEq for SplitFlag

impl StructuralPartialEq for SplitFlag