Struct VecWriter

pub struct VecWriter { /* private fields */ }

Helper struct to format a token stream as a vector of strings.

Examples

use genco::prelude::*;
use genco::fmt;

let map = rust::import("std::collections", "HashMap");

let tokens: rust::Tokens = quote! {
    let mut m = $map::new();
    m.insert(1u32, 2u32);
};

// Note: String implements std::fmt::Write
let mut w = fmt::VecWriter::new();

let fmt = fmt::Config::from_lang::<Rust>();

let config = rust::Config::default();
// Default format state for Rust.
let format = rust::Format::default();

tokens.format(&mut w.as_formatter(&fmt), &config, &format)?;

let vec = w.into_vec();

assert_eq!(
    vec![
        "let mut m = HashMap::new();",
        "m.insert(1u32, 2u32);",
    ],
    vec
);

Implementations

impl VecWriter

pub fn new() -> Self

Construct a new writer to a vector.

pub fn as_formatter<'a>(&'a mut self, config: &'a Config) -> Formatter<'a>

Convert into a formatter.

pub fn into_vec(self) -> Vec<String>

Convert into a vector.

Trait Implementations

impl Default for VecWriter

fn default() -> VecWriter

Returns the “default value” for a type.

impl Write for VecWriter

fn write_char(&mut self, c: char) -> Result

Writes a char into this writer, returning whether the write succeeded.

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

Writes a string slice into this writer, returning whether the write succeeded.

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

Glue for usage of the write! macro with implementors of this trait.