mirror of https://github.com/rust-lang/rust
50 lines
1.0 KiB
Rust
50 lines
1.0 KiB
Rust
//@ force-host
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//@ no-prefer-dynamic
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#![feature(proc_macro_quote)]
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#![feature(proc_macro_internals)] // FIXME - this shouldn't be necessary
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#![crate_type = "proc-macro"]
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extern crate proc_macro;
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extern crate custom_quote;
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use proc_macro::{quote, TokenStream};
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macro_rules! expand_to_quote {
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() => {
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quote! {
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let bang_error: bool = 25;
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}
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}
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}
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#[proc_macro]
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pub fn error_from_bang(_input: TokenStream) -> TokenStream {
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expand_to_quote!()
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}
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#[proc_macro]
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pub fn other_error_from_bang(_input: TokenStream) -> TokenStream {
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custom_quote::custom_quote! {
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my_ident
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}
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}
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#[proc_macro_attribute]
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pub fn error_from_attribute(_args: TokenStream, _input: TokenStream) -> TokenStream {
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quote! {
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struct AttributeError {
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field: MissingType
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}
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}
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}
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#[proc_macro_derive(ErrorFromDerive)]
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pub fn error_from_derive(_input: TokenStream) -> TokenStream {
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quote! {
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enum DeriveError {
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Variant(OtherMissingType)
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}
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}
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}
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