Trait Lang

pub trait Lang
where
    Self: 'static + Sized + Copy + Eq + Ord + Hash + Debug,
{
    type Config;
    type Format: Default;
    type Item: LangItem<Self>;

    // Provided methods
    fn default_indentation() -> Indentation { ... }
    fn open_quote(
        out: &mut Formatter<'_>,
        _config: &Self::Config,
        _format: &Self::Format,
        _has_eval: bool,
    ) -> Result { ... }
    fn close_quote(
        out: &mut Formatter<'_>,
        _config: &Self::Config,
        _format: &Self::Format,
        _has_eval: bool,
    ) -> Result { ... }
    fn string_eval_literal(
        out: &mut Formatter<'_>,
        config: &Self::Config,
        format: &Self::Format,
        literal: &str,
    ) -> Result { ... }
    fn start_string_eval(
        _out: &mut Formatter<'_>,
        _config: &Self::Config,
        _format: &Self::Format,
    ) -> Result { ... }
    fn end_string_eval(
        _out: &mut Formatter<'_>,
        _config: &Self::Config,
        _format: &Self::Format,
    ) -> Result { ... }
    fn write_quoted(out: &mut Formatter<'_>, input: &str) -> Result { ... }
    fn format_file(
        tokens: &Tokens<Self>,
        out: &mut Formatter<'_>,
        config: &Self::Config,
    ) -> Result { ... }
}

Trait to implement for language specialization.

The various language implementations can be found in the lang module.

Required Associated Types

type Config

Configuration associated with building a formatting element.

type Format: Default

State being used during formatting.

type Item: LangItem<Self>

The type used when resolving imports.

Provided Methods

fn default_indentation() -> Indentation

Provide the default indentation.

fn open_quote( out: &mut Formatter<'_>, _config: &Self::Config, _format: &Self::Format, _has_eval: bool, ) -> Result

Start a string quote.

fn close_quote( out: &mut Formatter<'_>, _config: &Self::Config, _format: &Self::Format, _has_eval: bool, ) -> Result

End a string quote.

fn string_eval_literal( out: &mut Formatter<'_>, config: &Self::Config, format: &Self::Format, literal: &str, ) -> Result

A simple, single-literal string evaluation.

fn start_string_eval( _out: &mut Formatter<'_>, _config: &Self::Config, _format: &Self::Format, ) -> Result

Start a string-interpolated eval.

fn end_string_eval( _out: &mut Formatter<'_>, _config: &Self::Config, _format: &Self::Format, ) -> Result

End a string interpolated eval.

fn write_quoted(out: &mut Formatter<'_>, input: &str) -> Result

Performing string quoting according to language convention.

fn format_file( tokens: &Tokens<Self>, out: &mut Formatter<'_>, config: &Self::Config, ) -> Result

Write a file according to the specified language convention.

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.

Implementations on Foreign Types

impl Lang for ()

Dummy implementation for a language.

type Config = ()

type Format = ()

type Item = ()

Implementors

impl Lang for C

type Config = Config

type Format = Format

type Item = Import

impl Lang for Csharp

type Config = Config

type Format = Format

type Item = Import

impl Lang for Dart

type Config = Config

type Format = Format

type Item = Import

impl Lang for Go

type Config = Config

type Format = Format

type Item = Import

impl Lang for Java

type Config = Config

type Format = Format

type Item = Import

impl Lang for JavaScript

type Config = Config

type Format = Format

type Item = Import

impl Lang for Nix

type Config = Config

type Format = Format

type Item = Import

impl Lang for Python

type Config = Config

type Format = Format

type Item = Any

impl Lang for Rust

type Config = Config

type Format = Format

type Item = Import

impl Lang for Swift

type Config = Config

type Format = Format

type Item = Import