Struct ConstExpr

pub struct ConstExpr { /* private fields */ }

A constant expression.

Usable in contexts such as offsets or initializers.

Implementations

impl ConstExpr

pub fn empty() -> Self

Create a new empty constant expression builder.

pub fn raw(bytes: impl IntoIterator<Item = u8>) -> Self

Create a constant expression with the specified raw encoding of instructions.

pub fn global_get(index: u32) -> Self

Create a constant expression containing a single global.get instruction.

pub fn ref_null(ty: HeapType) -> Self

Create a constant expression containing a single ref.null instruction.

pub fn ref_func(func: u32) -> Self

Create a constant expression containing a single ref.func instruction.

pub fn i32_const(value: i32) -> Self

Create a constant expression containing a single i32.const instruction.

pub fn i64_const(value: i64) -> Self

Create a constant expression containing a single i64.const instruction.

pub fn f32_const(value: f32) -> Self

Create a constant expression containing a single f32.const instruction.

pub fn f64_const(value: f64) -> Self

Create a constant expression containing a single f64.const instruction.

pub fn v128_const(value: i128) -> Self

Create a constant expression containing a single v128.const instruction.

pub fn with_global_get(self, index: u32) -> Self

Add a global.get instruction to this constant expression.

pub fn with_ref_null(self, ty: HeapType) -> Self

Add a ref.null instruction to this constant expression.

pub fn with_ref_func(self, func: u32) -> Self

Add a ref.func instruction to this constant expression.

pub fn with_i32_const(self, value: i32) -> Self

Add an i32.const instruction to this constant expression.

pub fn with_i64_const(self, value: i64) -> Self

Add an i64.const instruction to this constant expression.

pub fn with_f32_const(self, value: f32) -> Self

Add a f32.const instruction to this constant expression.

pub fn with_f64_const(self, value: f64) -> Self

Add a f64.const instruction to this constant expression.

pub fn with_v128_const(self, value: i128) -> Self

Add a v128.const instruction to this constant expression.

pub fn with_i32_add(self) -> Self

Add an i32.add instruction to this constant expression.

pub fn with_i32_sub(self) -> Self

Add an i32.sub instruction to this constant expression.

pub fn with_i32_mul(self) -> Self

Add an i32.mul instruction to this constant expression.

pub fn with_i64_add(self) -> Self

Add an i64.add instruction to this constant expression.

pub fn with_i64_sub(self) -> Self

Add an i64.sub instruction to this constant expression.

pub fn with_i64_mul(self) -> Self

Add an i64.mul instruction to this constant expression.

pub fn get_ref_func(&self) -> Option<u32>

Returns the function, if any, referenced by this global.

Trait Implementations

impl Clone for ConstExpr

fn clone(&self) -> ConstExpr

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for ConstExpr

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

Formats the value using the given formatter.

impl Encode for ConstExpr

fn encode(&self, sink: &mut Vec<u8>)

Encode the type into the given byte sink.

impl<'a> TryFrom<ConstExpr<'a>> for ConstExpr

Available on crate feature wasmparser only.

type Error = Error

The type returned in the event of a conversion error.

fn try_from(const_expr: ConstExpr<'_>) -> Result<Self, Self::Error>

Performs the conversion.