Manuel Cillero
87aac362d3
El crate pagetop-macros proporciona una colección de macros que impulsan el desarrollo con PageTop.
39 lines
1.3 KiB
Rust
39 lines
1.3 KiB
Rust
// #![doc(html_root_url = "https://docs.rs/maud_macros/0.25.0")]
|
|
// TokenStream values are reference counted, and the mental overhead of tracking
|
|
// lifetimes outweighs the marginal gains from explicit borrowing
|
|
// #![allow(clippy::needless_pass_by_value)]
|
|
|
|
mod ast;
|
|
mod escape;
|
|
mod generate;
|
|
mod parse;
|
|
|
|
use proc_macro2::{Ident, Span, TokenStream, TokenTree};
|
|
use proc_macro_crate::{crate_name, FoundCrate};
|
|
use quote::quote;
|
|
|
|
pub fn expand(input: TokenStream) -> TokenStream {
|
|
let output_ident = TokenTree::Ident(Ident::new("__maud_output", Span::mixed_site()));
|
|
// Heuristic: the size of the resulting markup tends to correlate with the
|
|
// code size of the template itself
|
|
let size_hint = input.to_string().len();
|
|
let markups = parse::parse(input);
|
|
let stmts = generate::generate(markups, output_ident.clone());
|
|
|
|
let found_crate = crate_name("pagetop").expect("pagetop is present in `Cargo.toml`");
|
|
let pre_escaped = match found_crate {
|
|
FoundCrate::Itself => quote!(
|
|
crate::html::PreEscaped(#output_ident)
|
|
),
|
|
_ => quote!(
|
|
pagetop::html::PreEscaped(#output_ident)
|
|
),
|
|
};
|
|
|
|
quote!({
|
|
extern crate alloc;
|
|
let mut #output_ident = alloc::string::String::with_capacity(#size_hint);
|
|
#stmts
|
|
#pre_escaped
|
|
})
|
|
}
|