Struct IntOp 

pub struct IntOp(/* private fields */);

An integer type plus the policies integer arithmetic consults: the modifier byte of every typed integer instruction that computes an integer.

Layout: bits 0–2 the IntTy code, bits 3–4 Overflow, bit 5 DivZero, bits 6–7 Shift (the value 3 is reserved). The float_to_int policy is not here: no integer arithmetic converts a float, and the conversions that do carry a FloatConv. Eight types times 4 × 2 × 3 policies is 192 valid bytes; the other 64 are refused.

Examples

use bytecode_lang::{IntOp, IntTy, Overflow, Policy, Shift};

let op = IntOp::new(IntTy::I64).with_policy(Policy::new().with_overflow(Overflow::Wrap));
assert_eq!(op.ty(), IntTy::I64);
assert_eq!(op.policy().overflow(), Overflow::Wrap);
assert_eq!(op.to_string(), "i64.wrap");
assert_eq!(IntOp::from_bits(op.bits()), Some(op));
let php = IntOp::new(IntTy::I64).with_policy(Policy::new().with_shift(Shift::Saturate));
assert_eq!(php.to_string(), "i64.shsat");
assert_eq!(IntOp::from_bits(0b1100_0011), None); // shift code 3 is reserved

Implementations

impl IntOp

pub const fn new(ty: IntTy) -> Self

An operation at ty with the default (all-error) policy.

Examples

use bytecode_lang::{IntOp, IntTy};

assert_eq!(IntOp::new(IntTy::U8).to_string(), "u8");

pub const fn with_policy(self, policy: Policy) -> Self

This operation with its policy replaced by policy’s overflow, div_zero, and shift (its float_to_int, which no integer arithmetic consults, is not carried).

Examples

use bytecode_lang::{IntOp, IntTy, Policy, Shift};

let op = IntOp::new(IntTy::I32).with_policy(Policy::new().with_shift(Shift::Mask));
assert_eq!(op.to_string(), "i32.mask");

pub const fn ty(self) -> IntTy

The integer type.

Examples

use bytecode_lang::{IntOp, IntTy};

assert_eq!(IntOp::new(IntTy::U64).ty(), IntTy::U64);

pub const fn policy(self) -> Policy

The policy set: overflow, div_zero, and shift as carried, and float_to_int at its default (error).

Examples

use bytecode_lang::{IntOp, IntTy, Policy};

assert_eq!(IntOp::new(IntTy::I8).policy(), Policy::new());

pub const fn bits(self) -> u8

The packed byte.

Examples

use bytecode_lang::{IntOp, IntTy};

assert_eq!(IntOp::new(IntTy::I64).bits(), 3);

pub const fn from_bits(bits: u8) -> Option<Self>

Unpacks the byte, or None if its shift field holds the reserved code 3.

Examples

use bytecode_lang::{IntOp, IntTy, Overflow};

let op = IntOp::from_bits(0b0001_1011).unwrap(); // i64, overflow = promote
assert_eq!((op.ty(), op.policy().overflow()), (IntTy::I64, Overflow::Promote));
assert!(IntOp::from_bits(0b1100_0000).is_none());

Trait Implementations

impl Clone for IntOp

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for IntOp

impl Debug for IntOp

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

Formats the value using the given formatter.

impl Display for IntOp

i64, followed by . and the non-default policies, if any.

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

Formats the value using the given formatter.

impl Eq for IntOp

impl Hash for IntOp

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 Ord for IntOp

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

This method returns an Ordering between self and other.

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

where Self: Sized,

Compares and returns the maximum of two values.

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

where Self: Sized,

Compares and returns the minimum of two values.

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

where Self: Sized,

Restrict a value to a certain interval.

fn clamp_to<R>(self, range: R) -> Self

where Self: Sized, R: ClampBounds<Self>,

🔬This is a nightly-only experimental API. (clamp_to)

Restrict a value to a certain range.

impl PartialEq for IntOp

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

Equality operator ==.

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

Inequality operator !=.

impl PartialOrd for IntOp

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

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

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

Tests less than (for self and other) and is used by the < operator.

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

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

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

Tests greater than (for self and other) and is used by the > operator.

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

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

impl StructuralPartialEq for IntOp