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#![feature(proc_macro_quote)]
mod ast;
mod gen;
use syn;
use ast::EnumLexer;
use gen::generate;
use proc_macro::TokenStream;
use quote::quote;
use proc_macro2::Span;
#[proc_macro]
pub fn enum_lexer(input: TokenStream) -> TokenStream {
enum_lexer_optional_bool(input, false)
}
#[proc_macro]
pub fn enum_lexer_test(input: TokenStream) -> TokenStream {
enum_lexer_optional_bool(input, true)
}
fn enum_lexer_optional_bool(input: TokenStream, test: bool) -> TokenStream {
let lexer = syn::parse_macro_input!(input as EnumLexer);
match generate(lexer, test) {
Ok(stream) => {
stream
}
Err(e) => {
let what = syn::LitStr::new(format!("{}", e).as_str(), Span::call_site());
quote!{
compile_error!(#what)
}
}
}.into()
}