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#![macro_use]
#![deny(unused)]
use proc_macro2::{Ident, TokenStream};
use quote::quote;
use syn::spanned::Spanned;
use syn::{Item, Result};
#[macro_use]
mod utils;
mod attr;
mod r#enum;
mod r#struct;
struct DerivedTS {
name: String,
inline: TokenStream,
decl: TokenStream,
inline_flattened: Option<TokenStream>,
dependencies: TokenStream,
}
impl DerivedTS {
fn into_impl(self, rust_ty: Ident) -> TokenStream {
let DerivedTS {
name,
inline,
decl,
inline_flattened,
dependencies,
} = self;
let inline_flattened = inline_flattened
.map(|t| {
quote! {
fn inline_flattened(indent: usize) -> String {
#t
}
}
})
.unwrap_or_else(TokenStream::new);
quote! {
impl ts_rs::TS for #rust_ty {
fn decl() -> String {
#decl
}
fn name() -> String {
#name.to_owned()
}
fn inline(indent: usize) -> String {
#inline
}
#inline_flattened
fn dependencies() -> Vec<(std::any::TypeId, String)> {
#dependencies
}
fn transparent() -> bool {
false
}
}
}
}
}
#[proc_macro_derive(TS, attributes(ts))]
pub fn typescript(input: proc_macro::TokenStream) -> proc_macro::TokenStream {
match entry(input) {
Err(err) => err.to_compile_error(),
Ok(result) => result,
}
.into()
}
fn entry(input: proc_macro::TokenStream) -> Result<TokenStream> {
let input = syn::parse::<Item>(input)?;
let (ts, ident) = match input {
Item::Struct(s) => (r#struct::struct_def(&s)?, s.ident),
Item::Enum(e) => (r#enum::r#enum(&e)?, e.ident),
_ => syn_err!(input.span(); "unsupported item"),
};
Ok(ts.into_impl(ident))
}