Struct MemoryTypeBuilder 

pub struct MemoryTypeBuilder { /* private fields */ }

A MemoryType builder.

Implementations

impl MemoryTypeBuilder

pub fn new() -> Self

Create a new builder for a MemoryType` with the default settings:

• The minimum memory size is 0 pages.
• The maximum memory size is unspecified.
• The page size is 64KiB.

pub fn memory64(&mut self, memory64: bool) -> &mut Self

Set whether this is a 64-bit memory type or not.

By default a memory is a 32-bit, a.k.a. false.

64-bit memories are part of the Wasm memory64 proposal.

pub fn min(&mut self, minimum: u64) -> &mut Self

Sets the minimum number of pages the built MemoryType supports.

The default minimum is 0.

pub fn max(&mut self, maximum: Option<u64>) -> &mut Self

Sets the optional maximum number of pages the built MemoryType supports.

A value of None means that there is no maximum number of pages.

The default maximum is None.

pub fn page_size_log2(&mut self, page_size_log2: u8) -> &mut Self

Sets the log2 page size in bytes, for the built MemoryType.

The default value is 16, which results in the default Wasm page size of 64KiB (aka 2^16 or 65536).

Currently, the only allowed values are 0 (page size of 1) or 16 (the default). Future Wasm proposal extensions might change this limitation.

Non-default page sizes are part of the custom-page-sizes proposal for WebAssembly which is not fully standardized yet.

pub fn build(self) -> Result<MemoryType, MemoryError>

Finalize the construction of the MemoryType.

Errors

If the chosen configuration for the constructed MemoryType is invalid.

Trait Implementations

impl Default for MemoryTypeBuilder

fn default() -> MemoryTypeBuilder

Returns the “default value” for a type.