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Add gating for rustc_* attrs

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This commit is contained in:
Manish Goregaokar 2015-02-17 01:46:36 +05:30
parent 1fffdafe41
commit 0129002d3a
2 changed files with 31 additions and 13 deletions
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1
src/libcore/lib.rs
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@ -67,6 +67,7 @@
#![feature(simd, unsafe_destructor)]
#![feature(staged_api)]
#![feature(unboxed_closures)]
#![feature(rustc_attrs)]
#[macro_use]
mod macros;

31
src/libsyntax/feature_gate.rs
View File

@ -135,7 +135,10 @@ static KNOWN_FEATURES: &'static [(&'static str, &'static str, Status)] = &[
("unsafe_no_drop_flag", "1.0.0", Active),
// Allows the use of custom attributes; RFC 572
("custom_attribute", "1.0.0", Active)
("custom_attribute", "1.0.0", Active),
// Allows the use of rustc_* attributes; RFC 572
("rustc_attrs", "1.0.0", Active),
];
// (changing above list without updating src/doc/reference.md makes @cmr sad)
@ -178,8 +181,6 @@ pub static KNOWN_ATTRIBUTES: &'static [(&'static str, AttributeType)] = &[
("repr", Normal),
("path", Normal),
("abi", Normal),
("rustc_move_fragments", Normal),
("rustc_variance", Normal),
("unsafe_destructor", Normal),
("automatically_derived", Normal),
("no_mangle", Normal),
@ -202,9 +203,6 @@ pub static KNOWN_ATTRIBUTES: &'static [(&'static str, AttributeType)] = &[
"no_std is experimental")),
("lang", Gated("lang_items",
"language items are subject to change")),
("rustc_on_unimplemented", Gated("on_unimplemented",
"the `#[rustc_on_unimplemented]` attribute \
is an experimental feature")),
("linkage", Gated("linkage",
"the `linkage` attribute is experimental \
and not portable across platforms")),
@ -213,6 +211,19 @@ pub static KNOWN_ATTRIBUTES: &'static [(&'static str, AttributeType)] = &[
currently handle destructors. There is no corresponding \
`#[task_local]` mapping to the task model")),
("rustc_on_unimplemented", Gated("on_unimplemented",
"the `#[rustc_on_unimplemented]` attribute \
is an experimental feature")),
("rustc_variance", Gated("rustc_attrs",
"the `#[rustc_variance]` attribute \
is an experimental feature")),
("rustc_error", Gated("rustc_attrs",
"the `#[rustc_error]` attribute \
is an experimental feature")),
("rustc_move_fragments", Gated("rustc_attrs",
"the `#[rustc_move_fragments]` attribute \
is an experimental feature")),
// FIXME: #14408 whitelist docs since rustdoc looks at them
("doc", Whitelisted),
@ -243,7 +254,6 @@ pub static KNOWN_ATTRIBUTES: &'static [(&'static str, AttributeType)] = &[
("must_use", Whitelisted),
("stable", Whitelisted),
("unstable", Whitelisted),
("rustc_error", Whitelisted),
// FIXME: #19470 this shouldn't be needed forever
("old_orphan_check", Whitelisted),
@ -584,6 +594,12 @@ impl<'a, 'v> Visitor<'v> for PostExpansionVisitor<'a> {
return;
}
}
if name.starts_with("rustc_") {
self.gate_feature("rustc_attrs", attr.span,
"unless otherwise specified, attributes \
with the prefix `rustc_` \
are reserved for internal compiler diagnostics");
} else {
self.gate_feature("custom_attribute", attr.span,
format!("The attribute `{}` is currently \
unknown to the the compiler and \
@ -591,6 +607,7 @@ impl<'a, 'v> Visitor<'v> for PostExpansionVisitor<'a> {
added to it in the future",
name).as_slice());
}
}
fn visit_pat(&mut self, pattern: &ast::Pat) {
match pattern.node {