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Fix FP with USELESS_VEC and non-copy types

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This commit is contained in:
mcarton 2016-07-14 19:31:17 +02:00
parent c1eb5828fa
commit ea665c38f1
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4 changed files with 68 additions and 50 deletions
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7
clippy_lints/src/utils/mod.rs
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@ -15,7 +15,7 @@ use std::env;
use std::mem;
use std::str::FromStr;
use syntax::ast::{self, LitKind};
use syntax::codemap::{ExpnFormat, ExpnInfo, MultiSpan, Span};
use syntax::codemap::{ExpnFormat, ExpnInfo, MultiSpan, Span, DUMMY_SP};
use syntax::errors::DiagnosticBuilder;
use syntax::ptr::P;
@ -723,3 +723,8 @@ pub fn type_is_unsafe_function(ty: ty::Ty) -> bool {
_ => false,
}
}
pub fn is_copy<'a, 'ctx>(cx: &LateContext<'a, 'ctx>, ty: ty::Ty<'ctx>, env: NodeId) -> bool {
let env = ty::ParameterEnvironment::for_item(cx.tcx, env);
!ty.subst(cx.tcx, env.free_substs).moves_by_default(cx.tcx.global_tcx(), &env, DUMMY_SP)
}