diff options
| author | Esteban Küber <esteban@kuber.com.ar> | 2016-12-27 17:02:52 -0800 |
|---|---|---|
| committer | Esteban Küber <esteban@kuber.com.ar> | 2016-12-27 17:02:52 -0800 |
| commit | e766c465d2e4c4e3c106bfa8343cbe6f9192d445 (patch) | |
| tree | 821a7cf1e0b04ac9c0cddede6eb760bbf2d0ce62 /src/libsyntax_ext/deriving/mod.rs | |
| parent | 96c52d4fd86aed6320732a511c04bcbfff7d117f (diff) | |
| parent | 314c28b729ae359b99586cc62c486c28e0d44424 (diff) | |
Merge branch 'master' into escape-reason-docs
Diffstat (limited to 'src/libsyntax_ext/deriving/mod.rs')
| -rw-r--r-- | src/libsyntax_ext/deriving/mod.rs | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/src/libsyntax_ext/deriving/mod.rs b/src/libsyntax_ext/deriving/mod.rs index 535d7de19e3..0511b0d252b 100644 --- a/src/libsyntax_ext/deriving/mod.rs +++ b/src/libsyntax_ext/deriving/mod.rs @@ -175,8 +175,10 @@ pub fn expand_derive(cx: &mut ExtCtxt, feature_gate::GateIssue::Language, feature_gate::EXPLAIN_CUSTOM_DERIVE); } else { - cx.span_warn(titem.span, feature_gate::EXPLAIN_DEPR_CUSTOM_DERIVE); let name = Symbol::intern(&format!("derive_{}", tname)); + if !cx.resolver.is_whitelisted_legacy_custom_derive(name) { + cx.span_warn(titem.span, feature_gate::EXPLAIN_DEPR_CUSTOM_DERIVE); + } let mitem = cx.meta_word(titem.span, name); new_attributes.push(cx.attribute(mitem.span, mitem)); } |