Struct wasmparser::MemoryType

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pub struct MemoryType {
    pub memory64: bool,
    pub shared: bool,
    pub initial: u64,
    pub maximum: Option<u64>,
    pub page_size_log2: Option<u32>,
}
Expand description

Represents a memory’s type.

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§memory64: bool

Whether or not this is a 64-bit memory, using i64 as an index. If this is false it’s a 32-bit memory using i32 as an index.

This is part of the memory64 proposal in WebAssembly.

§shared: bool

Whether or not this is a “shared” memory, indicating that it should be send-able across threads and the maximum field is always present for valid types.

This is part of the threads proposal in WebAssembly.

§initial: u64

Initial size of this memory, in wasm pages.

For 32-bit memories (when memory64 is false) this is guaranteed to be at most u32::MAX for valid types.

§maximum: Option<u64>

Optional maximum size of this memory, in wasm pages.

For 32-bit memories (when memory64 is false) this is guaranteed to be at most u32::MAX for valid types. This field is always present for valid wasm memories when shared is true.

§page_size_log2: Option<u32>

The log base 2 of the memory’s custom page size.

Memory pages are, by default, 64KiB large (i.e. 216 or 65536).

The custom-page-sizes proposal allows changing it to other values.

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impl MemoryType

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pub fn index_type(&self) -> ValType

Gets the index type for the memory.

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impl Clone for MemoryType

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fn clone(&self) -> MemoryType

Returns a copy of the value. Read more
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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl Debug for MemoryType

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

Formats the value using the given formatter. Read more
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impl<'a> FromReader<'a> for MemoryType

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fn from_reader(reader: &mut BinaryReader<'a>) -> Result<Self>

Attempts to read Self from the provided binary reader, returning an error if it is unable to do so.
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impl Hash for MemoryType

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

Feeds this value into the given Hasher. Read more
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fn hash_slice<H>(data: &[Self], state: &mut H)
where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher. Read more
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impl PartialEq for MemoryType

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

Tests for self and other values to be equal, and is used by ==.
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fn ne(&self, other: &Rhs) -> bool

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

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impl Eq for MemoryType

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impl StructuralPartialEq for MemoryType

Auto Trait Implementations§

Blanket Implementations§

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impl<T> Any for T
where T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> Borrow<T> for T
where T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for T
where T: ?Sized,

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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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impl<T> CloneToUninit for T
where T: Clone,

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unsafe fn clone_to_uninit(&self, dst: *mut T)

🔬This is a nightly-only experimental API. (clone_to_uninit)
Performs copy-assignment from self to dst. Read more
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T, U> Into<U> for T
where U: From<T>,

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fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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impl<T> ToOwned for T
where T: Clone,

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type Owned = T

The resulting type after obtaining ownership.
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fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more
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fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more
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impl<T, U> TryFrom<U> for T
where U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.