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Add ExpnId to expanded procedural macro code

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This commit is contained in:
David Tolnay 2016-09-09 14:53:15 -07:00
parent 707a40f206
commit fe41520fce
1 changed files with 16 additions and 4 deletions
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20
src/libsyntax_ext/deriving/custom.rs
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@ -10,12 +10,14 @@
use std::panic;
use errors::FatalError;
use rustc_macro::{TokenStream, __internal};
use syntax::ast::{self, ItemKind};
use syntax::codemap::Span;
use syntax::codemap::{ExpnInfo, MacroAttribute, NameAndSpan, Span};
use syntax::ext::base::*;
use syntax::fold::{self, Folder};
use errors::FatalError;
use syntax::parse::token::intern;
use syntax::print::pprust;
pub struct CustomDerive {
inner: fn(TokenStream) -> TokenStream,
@ -31,7 +33,7 @@ impl MultiItemModifier for CustomDerive {
fn expand(&self,
ecx: &mut ExtCtxt,
span: Span,
_meta_item: &ast::MetaItem,
meta_item: &ast::MetaItem,
item: Annotatable)
-> Vec<Annotatable> {
let item = match item {
@ -53,7 +55,17 @@ impl MultiItemModifier for CustomDerive {
}
}
let input_span = item.span;
let input_span = Span {
expn_id: ecx.codemap().record_expansion(ExpnInfo {
call_site: span,
callee: NameAndSpan {
format: MacroAttribute(intern(&pprust::meta_item_to_string(meta_item))),
span: Some(span),
allow_internal_unstable: true,
},
}),
..item.span
};
let input = __internal::new_token_stream(item);
let res = __internal::set_parse_sess(&ecx.parse_sess, || {
let inner = self.inner;