Trait wasmprinter::Print

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pub trait Print {
    // Required method
    fn write_str(&mut self, s: &str) -> Result<()>;

    // Provided methods
    fn newline(&mut self) -> Result<()> { ... }
    fn start_line(&mut self, binary_offset: Option<usize>) { ... }
    fn write_fmt(&mut self, args: Arguments<'_>) -> Result<()> { ... }
    fn print_custom_section(
        &mut self,
        name: &str,
        binary_offset: usize,
        data: &[u8],
    ) -> Result<bool> { ... }
    fn start_literal(&mut self) -> Result<()> { ... }
    fn start_name(&mut self) -> Result<()> { ... }
    fn start_keyword(&mut self) -> Result<()> { ... }
    fn start_type(&mut self) -> Result<()> { ... }
    fn start_comment(&mut self) -> Result<()> { ... }
    fn reset_color(&mut self) -> Result<()> { ... }
    fn supports_async_color(&self) -> bool { ... }
}

Expand description

Trait used to print WebAssembly modules in this crate.

Instances of this trait are passed to Config::print. Instances of this trait are where the output of a WebAssembly binary goes.

Note that this trait has built-in adapters in the wasmprinter crate:

For users of std::io::Write use PrintIoWrite.
For users of std::fmt::Write use PrintFmtWrite.

Required Methods§

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fn write_str(&mut self, s: &str) -> Result<()>

Writes the given string s in its entirety.

Returns an error for any I/O error.

Provided Methods§

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fn newline(&mut self) -> Result<()>

Indicates that a newline is being printed.

This can be overridden to hook into the offset at which lines are printed.

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fn start_line(&mut self, binary_offset: Option<usize>)

Indicates that a new line in the output is starting at the binary_offset provided.

Not all new lines have a binary offset associated with them but this method should be called for new lines in the output. This enables correlating binary offsets to lines in the output.

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fn write_fmt(&mut self, args: Arguments<'_>) -> Result<()>

Enables usage of write! with this trait.

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fn print_custom_section( &mut self, name: &str, binary_offset: usize, data: &[u8], ) -> Result<bool>

Helper to print a custom section, if needed.

If this output has a custom means of printing a custom section then this can be used to override the default. If Ok(true) is returned then the section will be considered to be printed. Otherwise an Ok(false) return value indicates that the default printing should happen.

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