use std::fmt::{self, Display};
#[derive(Debug, Clone, Eq, Hash)]
pub struct Ident(String);
impl Ident {
pub fn new<T: Into<Ident>>(t: T) -> Self {
t.into()
}
}
impl<'a> From<&'a str> for Ident {
fn from(s: &str) -> Self {
Ident(s.to_owned())
}
}
impl From<String> for Ident {
fn from(s: String) -> Self {
Ident(s)
}
}
impl From<usize> for Ident {
fn from(u: usize) -> Self {
Ident(u.to_string())
}
}
impl AsRef<str> for Ident {
fn as_ref(&self) -> &str {
&self.0
}
}
impl Display for Ident {
fn fmt(&self, formatter: &mut fmt::Formatter) -> Result<(), fmt::Error> {
self.0.fmt(formatter)
}
}
impl<T: ?Sized> PartialEq<T> for Ident where T: AsRef<str> {
fn eq(&self, other: &T) -> bool {
self.0 == other.as_ref()
}
}
#[cfg(feature = "parsing")]
pub mod parsing {
use super::*;
use nom::multispace;
fn ident_ch(ch: char) -> bool {
ch.is_alphanumeric() || ch == '_'
}
named!(pub ident -> Ident, preceded!(
option!(multispace),
map!(take_while1!(ident_ch), Into::into)
));
}
#[cfg(feature = "printing")]
mod printing {
use super::*;
use quote::{Tokens, ToTokens};
impl ToTokens for Ident {
fn to_tokens(&self, tokens: &mut Tokens) {
tokens.append(self.as_ref())
}
}
}