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use std::fmt::Write;
use quote::ToTokens;
use syn::punctuated::{Pair, Punctuated};
pub trait SynPathExt
{
fn new_empty() -> Self;
/// Converts the [`syn::Path`] to a [`String`].
fn to_string(&self) -> String;
}
impl SynPathExt for syn::Path
{
fn new_empty() -> Self
{
Self {
leading_colon: None,
segments: Punctuated::new(),
}
}
fn to_string(&self) -> String
{
self.segments.pairs().map(Pair::into_tuple).fold(
String::new(),
|mut acc, (segment, opt_punct)| {
let segment_ident = &segment.ident;
write!(
acc,
"{segment_ident}{}",
opt_punct
.map(|punct| punct.to_token_stream().to_string())
.unwrap_or_default()
)
.ok();
acc
},
)
}
}
macro_rules! syn_path {
($first_segment: ident $(::$segment: ident)*) => {
::syn::Path {
leading_colon: None,
segments: ::syn::punctuated::Punctuated::from_iter([
$crate::util::syn_path::syn_path_segment!($first_segment),
$($crate::util::syn_path::syn_path_segment!($segment),)*
])
}
};
}
macro_rules! syn_path_segment {
($segment: ident) => {
::syn::PathSegment {
ident: ::proc_macro2::Ident::new(
stringify!($segment),
::proc_macro2::Span::call_site(),
),
arguments: ::syn::PathArguments::None,
}
};
}
pub(crate) use {syn_path, syn_path_segment};
|
