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#![deny(
anonymous_parameters,
clippy::all,
const_err,
illegal_floating_point_literal_pattern,
late_bound_lifetime_arguments,
path_statements,
patterns_in_fns_without_body,
rust_2018_idioms,
trivial_casts,
trivial_numeric_casts,
unreachable_pub,
unsafe_code,
unused_extern_crates
)]
#![warn(
clippy::dbg_macro,
clippy::decimal_literal_representation,
clippy::get_unwrap,
clippy::nursery,
clippy::print_stdout,
clippy::todo,
clippy::unimplemented,
clippy::unnested_or_patterns,
clippy::unwrap_used,
clippy::use_debug,
single_use_lifetimes,
unused_qualifications,
variant_size_differences
)]
#![allow(clippy::missing_const_for_fn, clippy::redundant_pub_crate)]
#[macro_use]
mod quote;
mod date;
mod datetime;
mod error;
mod format_description;
mod helpers;
mod offset;
mod serde_format_description;
mod time;
mod to_tokens;
use proc_macro::{TokenStream, TokenTree};
use self::error::Error;
macro_rules! impl_macros {
($($name:ident)*) => {$(
#[proc_macro]
pub fn $name(input: TokenStream) -> TokenStream {
use crate::to_tokens::ToTokenTree;
let mut iter = input.into_iter().peekable();
match $name::parse(&mut iter) {
Ok(value) => match iter.peek() {
Some(tree) => Error::UnexpectedToken { tree: tree.clone() }.to_compile_error(),
None => TokenStream::from(value.into_token_tree()),
},
Err(err) => err.to_compile_error(),
}
}
)*};
}
impl_macros![date datetime offset time];
#[proc_macro]
pub fn format_description(input: TokenStream) -> TokenStream {
(|| {
let (span, string) = helpers::get_string_literal(input)?;
let items = format_description::parse(&string, span)?;
Ok(quote! {{
const DESCRIPTION: &[::time::format_description::FormatItem<'_>] = &[#S(
items
.into_iter()
.map(|item| quote! { #S(item), })
.collect::<TokenStream>()
)];
DESCRIPTION
}})
})()
.unwrap_or_else(|err: Error| err.to_compile_error())
}
#[proc_macro]
pub fn serde_format_description(input: TokenStream) -> TokenStream {
(|| {
let mut tokens = input.into_iter().peekable();
let mod_name = match tokens.next() {
Some(TokenTree::Ident(ident)) => Ok(ident),
Some(tree) => Err(Error::UnexpectedToken { tree }),
None => Err(Error::UnexpectedEndOfInput),
}?;
helpers::consume_punct(',', &mut tokens)?;
let formattable = match tokens.next() {
Some(tree @ TokenTree::Ident(_)) => Ok(tree),
Some(tree) => Err(Error::UnexpectedToken { tree }),
None => Err(Error::UnexpectedEndOfInput),
}?;
helpers::consume_punct(',', &mut tokens)?;
let (span, format_string) = helpers::get_string_literal(tokens.collect())?;
let items = format_description::parse(&format_string, span)?;
let items: TokenStream = items.into_iter().map(|item| quote! { #S(item), }).collect();
Ok(serde_format_description::build(
mod_name,
items,
formattable,
&String::from_utf8_lossy(&format_string),
))
})()
.unwrap_or_else(|err: Error| err.to_compile_error_standalone())
}