pulley_interpreter::decode

Trait BytecodeStream

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pub trait BytecodeStream: Copy {
    type Error;

    // Required methods
    fn unexpected_eof(&self) -> Self::Error;
    fn invalid_opcode(&self, code: u8) -> Self::Error;
    fn invalid_extended_opcode(&self, code: u16) -> Self::Error;
    fn invalid_reg(&self, reg: u8) -> Self::Error;
    fn read<const N: usize>(&mut self) -> Result<[u8; N], Self::Error>;
}
Available on crate feature decode only.
Expand description

An abstraction over any kind of bytecode stream.

There are two primary implementations:

  1. SafeBytecodeStream: A thin wrapper around an index into a &[u8]. This implementation is 100% safe code.

  2. UnsafeBytecodeStream: A thin wrapper over a raw pointer. This implementation is wildly unsafe and will result in memory unsafety and other terrors when given invalid bytecode, or even valid bytecode encoding a program that itself does not preserve memory safety.

Required Associated Types§

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type Error

The type of error that this bytecode stream produces on invalid operations.

Required Methods§

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fn unexpected_eof(&self) -> Self::Error

Create an “unexpected end-of-stream” error at the current position.

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fn invalid_opcode(&self, code: u8) -> Self::Error

Create an “invalid opcode” error at the current position.

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fn invalid_extended_opcode(&self, code: u16) -> Self::Error

Create an “invalid extended opcode” error at the current position.

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fn invalid_reg(&self, reg: u8) -> Self::Error

Create an “invalid register” error at the current position.

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fn read<const N: usize>(&mut self) -> Result<[u8; N], Self::Error>

Read N bytes from this bytecode stream, advancing the stream’s position at the same time.

Object Safety§

This trait is not object safe.

Implementors§