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extern crate proc_macro;
use crate::proc_macro::*;
use std::str::FromStr;
fn make(name: &str, input: TokenStream) -> TokenStream {
let ret = FromStr::from_str(&format!("v9::{}! {{ {} }}", name, input)).unwrap();
ret
}
#[proc_macro_attribute]
pub fn table(_attr: TokenStream, input: TokenStream) -> TokenStream {
make("decl_table", input)
}
#[proc_macro_attribute]
pub fn context(_attr: TokenStream, input: TokenStream) -> TokenStream {
make("decl_context", input)
}
#[proc_macro_attribute]
pub fn property(_attr: TokenStream, input: TokenStream) -> TokenStream {
let mut vis = TokenStream::new();
let mut hit_struct = false;
let mut struct_name = None;
for t in input.clone().into_iter() {
match t {
TokenTree::Punct(ref p) if p.as_char() == '#' => (),
TokenTree::Group(ref g) if g.delimiter() == Delimiter::Bracket => (),
TokenTree::Ident(ref i) if &i.to_string() == "struct" => hit_struct = true,
TokenTree::Ident(ref i) if hit_struct => {
struct_name = Some(i.clone());
break;
},
t => vis.extend(Some(t)),
}
}
let struct_name = struct_name.expect("expected 'struct name' or something");
let out = format!(r#"
{input}
mod _v9_property_call_{name} {{
type TheType = super::{name};
v9::decl_property! {{ {vis} {name}: TheType }}
}}
"#, input=input, vis=vis, name=struct_name);
let ret = FromStr::from_str(&out).unwrap();
ret
}