1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
|
// Copyright 2021-2022 Ian Jackson and contributors to Hippotat
// SPDX-License-Identifier: GPL-3.0-or-later WITH LicenseRef-Hippotat-OpenSSL-Exception
// There is NO WARRANTY.
//! Hippotat - proc macros
//!
//! This crate is an internal detail of hippotat.
//! It does not adhere to semver.
#![allow(clippy::style)]
#![allow(clippy::expect_fun_call)]
#![allow(clippy::map_flatten)]
#![allow(clippy::single_char_pattern)]
use syn::LitStr;
use quote::quote;
#[proc_macro]
pub fn into_crlfs(input: proc_macro::TokenStream) -> proc_macro::TokenStream {
let input: proc_macro2::TokenStream = input.into();
let token: LitStr = syn::parse2(input).expect("expected literal");
let input = token.value();
let output = input.split_inclusive('\n')
.map(|s| s.trim_start_matches(&[' ','\t'][..]))
.map(|s| match s.strip_suffix("\n") {
None => [s, ""],
Some(l) => [l, "\r\n"],
})
.flatten()
.collect::<String>();
//dbg!(&output);
let output = LitStr::new(&output, token.span());
let output = quote!(#output);
output.into()
}
|
