xeos
/
num-traits
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

macros: update string interning

This commit is contained in:
Josh Stone 2016-11-28 09:40:50 -08:00
parent d7cbdb509c
commit 7ebef5bbe6
1 changed files with 7 additions and 8 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

15
macros/src/lib.rs
View File

@ -25,10 +25,9 @@ use syntax::ext::base::{ExtCtxt, Annotatable};
use syntax::ext::build::AstBuilder;
use syntax_ext::deriving::generic::*;
use syntax_ext::deriving::generic::ty::*;
use syntax::parse::token::InternedString;
use syntax::symbol::Symbol;
use syntax::ptr::P;
use syntax::ext::base::MultiDecorator;
use syntax::parse::token;
use rustc_plugin::Registry;
@ -66,7 +65,7 @@ pub fn expand_deriving_from_primitive(cx: &mut ExtCtxt,
item: &Annotatable,
push: &mut FnMut(Annotatable))
{
let inline = cx.meta_word(span, InternedString::new("inline"));
let inline = cx.meta_word(span, Symbol::intern("inline"));
let attrs = vec!(cx.attribute(span, inline));
let trait_def = TraitDef {
is_unsafe: false,
@ -128,13 +127,13 @@ fn cs_from(name: &str, cx: &mut ExtCtxt, trait_span: Span, substr: &Substructure
match *substr.fields {
StaticStruct(..) => {
cx.span_err(trait_span, "`FromPrimitive` cannot be derived for structs");
return cx.expr_fail(trait_span, InternedString::new(""));
return cx.expr_fail(trait_span, Symbol::intern(""));
}
StaticEnum(enum_def, _) => {
if enum_def.variants.is_empty() {
cx.span_err(trait_span,
"`FromPrimitive` cannot be derived for enums with no variants");
return cx.expr_fail(trait_span, InternedString::new(""));
return cx.expr_fail(trait_span, Symbol::intern(""));
}
let mut arms = Vec::new();
@ -169,14 +168,14 @@ fn cs_from(name: &str, cx: &mut ExtCtxt, trait_span: Span, substr: &Substructure
"`FromPrimitive` cannot be derived for \
enum variants with arguments");
return cx.expr_fail(trait_span,
InternedString::new(""));
Symbol::intern(""));
}
ast::VariantData::Struct(..) => {
cx.span_err(trait_span,
"`FromPrimitive` cannot be derived for enums \
with struct variants");
return cx.expr_fail(trait_span,
InternedString::new(""));
Symbol::intern(""));
}
}
}
@ -200,6 +199,6 @@ fn cs_from(name: &str, cx: &mut ExtCtxt, trait_span: Span, substr: &Substructure
#[doc(hidden)]
pub fn plugin_registrar(reg: &mut Registry) {
reg.register_syntax_extension(
token::intern("derive_NumFromPrimitive"),
Symbol::intern("derive_NumFromPrimitive"),
MultiDecorator(Box::new(expand_deriving_from_primitive)));
}