rust-lang/rust
1
0
Fork 0
Code Issues Pull Requests Actions 1 Packages Projects Releases Wiki Activity

Update to rustc master

Browse Source
This commit is contained in:
Oliver Schneider
2018-03-13 11:38:11 +01:00
parent 5296c52307
commit f7b2578aea
21 changed files with 400 additions and 599 deletions
Download Patch File Download Diff File Expand all files Collapse all files

64
clippy_lints/src/misc.rs
View File

@@ -2,18 +2,14 @@ use reexport::*;
use rustc::hir::*;
use rustc::hir::intravisit::FnKind;
use rustc::lint::*;
use rustc::middle::const_val::ConstVal;
use rustc::ty;
use rustc::ty::subst::Substs;
use rustc_const_eval::ConstContext;
use rustc_const_math::ConstFloat;
use syntax::codemap::{ExpnFormat, Span};
use utils::{get_item_name, get_parent_expr, implements_trait, in_constant, in_macro, is_integer_literal,
iter_input_pats, last_path_segment, match_qpath, match_trait_method, paths, snippet, span_lint,
span_lint_and_then, walk_ptrs_ty};
use utils::sugg::Sugg;
use syntax::ast::{FloatTy, LitKind, CRATE_NODE_ID};
use consts::constant;
use syntax::ast::{LitKind, CRATE_NODE_ID};
use consts::{constant, Constant};
/// **What it does:** Checks for function arguments and let bindings denoted as
/// `ref`.
@@ -457,58 +453,10 @@ fn is_named_constant<'a, 'tcx>(cx: &LateContext<'a, 'tcx>, expr: &'tcx Expr) ->
}
fn is_allowed<'a, 'tcx>(cx: &LateContext<'a, 'tcx>, expr: &'tcx Expr) -> bool {
let parent_item = cx.tcx.hir.get_parent(expr.id);
let parent_def_id = cx.tcx.hir.local_def_id(parent_item);
let substs = Substs::identity_for_item(cx.tcx, parent_def_id);
let res = ConstContext::new(cx.tcx, cx.param_env.and(substs), cx.tables).eval(expr);
if let Ok(&ty::Const {
val: ConstVal::Float(val),
..
}) = res
{
use std::cmp::Ordering;
match val.ty {
FloatTy::F32 => {
let zero = ConstFloat {
ty: FloatTy::F32,
bits: u128::from(0.0_f32.to_bits()),
};
let infinity = ConstFloat {
ty: FloatTy::F32,
bits: u128::from(::std::f32::INFINITY.to_bits()),
};
let neg_infinity = ConstFloat {
ty: FloatTy::F32,
bits: u128::from(::std::f32::NEG_INFINITY.to_bits()),
};
val.try_cmp(zero) == Ok(Ordering::Equal) || val.try_cmp(infinity) == Ok(Ordering::Equal)
|| val.try_cmp(neg_infinity) == Ok(Ordering::Equal)
},
FloatTy::F64 => {
let zero = ConstFloat {
ty: FloatTy::F64,
bits: u128::from(0.0_f64.to_bits()),
};
let infinity = ConstFloat {
ty: FloatTy::F64,
bits: u128::from(::std::f64::INFINITY.to_bits()),
};
let neg_infinity = ConstFloat {
ty: FloatTy::F64,
bits: u128::from(::std::f64::NEG_INFINITY.to_bits()),
};
val.try_cmp(zero) == Ok(Ordering::Equal) || val.try_cmp(infinity) == Ok(Ordering::Equal)
|| val.try_cmp(neg_infinity) == Ok(Ordering::Equal)
},
}
} else {
false
match constant(cx, expr) {
Some((Constant::F32(f), _)) => f == 0.0 || f.is_infinite(),
Some((Constant::F64(f), _)) => f == 0.0 || f.is_infinite(),
_ => false,
}
}