Struct wasmtime_environ::wasmparser::OperatorsReader

pub struct OperatorsReader<'a> { /* private fields */ }

A reader for a core WebAssembly function’s operators.

Implementations

impl<'a> OperatorsReader<'a>

pub fn eof(&self) -> bool

Determines if the reader is at the end of the operators.

pub fn original_position(&self) -> usize

Gets the original position of the reader.

pub fn ensure_end(&self) -> Result<(), BinaryReaderError>

Ensures the reader is at the end.

This function returns an error if there is extra data after the operators.

pub fn read(&mut self) -> Result<Operator<'a>, BinaryReaderError>

Reads an operator from the reader.

pub fn into_iter_with_offsets(self) -> OperatorsIteratorWithOffsets<'a>

Converts to an iterator of operators paired with offsets.

pub fn read_with_offset( &mut self, ) -> Result<(Operator<'a>, usize), BinaryReaderError>

Reads an operator with its offset.

pub fn visit_operator<T>( &mut self, visitor: &mut T, ) -> Result<<T as VisitOperator<'a>>::Output, BinaryReaderError>

where T: VisitOperator<'a>,

Visit a single operator with the specified VisitOperator instance.

See BinaryReader::visit_operator for more information.

pub fn get_binary_reader(&self) -> BinaryReader<'a>

Gets a binary reader from this operators reader.

pub fn is_end_then_eof(&self) -> bool

Returns whether there is an end opcode followed by eof remaining in this reader.

Trait Implementations

impl<'a> Clone for OperatorsReader<'a>

fn clone(&self) -> OperatorsReader<'a>

Returns a copy of the value.

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

Performs copy-assignment from source.

impl<'a> IntoIterator for OperatorsReader<'a>

fn into_iter(self) -> <OperatorsReader<'a> as IntoIterator>::IntoIter

Reads content of the code section.

Examples

let reader = BinaryReader::new(data, 0);
let code_reader = CodeSectionReader::new(reader).unwrap();
for body in code_reader {
    let body = body.expect("function body");
    let mut op_reader = body.get_operators_reader().expect("op reader");
    let ops = op_reader.into_iter().collect::<Result<Vec<Operator>>>().expect("ops");
    assert!(
        if let [Operator::Nop, Operator::End] = ops.as_slice() { true } else { false },
        "found {:?}",
        ops
    );
}

type Item = Result<Operator<'a>, BinaryReaderError>

The type of the elements being iterated over.

type IntoIter = OperatorsIterator<'a>

Which kind of iterator are we turning this into?