49 lines
1.4 KiB
Rust
49 lines
1.4 KiB
Rust
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//! Checks for usage of nightly features that have simple stable equivalents
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//!
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//! This lint is **warn** by default
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use rustc::lint::*;
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use rustc_front::hir::*;
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use utils::{span_lint};
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declare_lint! {
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pub AS_SLICE,
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Warn,
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"as_slice is not stable and can be replaced by & v[..]\
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see https://github.com/rust-lang/rust/issues/27729"
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}
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declare_lint! {
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pub AS_MUT_SLICE,
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Warn,
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"as_mut_slice is not stable and can be replaced by &mut v[..]\
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see https://github.com/rust-lang/rust/issues/27729"
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}
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#[derive(Copy,Clone)]
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pub struct NeedlessFeaturesPass;
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impl LintPass for NeedlessFeaturesPass {
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fn get_lints(&self) -> LintArray {
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lint_array!(AS_SLICE,AS_MUT_SLICE)
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}
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}
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impl LateLintPass for NeedlessFeaturesPass {
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fn check_expr(&mut self, cx: &LateContext, expr: &Expr) {
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if let ExprMethodCall(ref name, _, _) = expr.node {
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if name.node.as_str() == "as_slice" {
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span_lint(cx, AS_SLICE, expr.span,
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"used as_slice() from the 'convert' nightly feature. Use &[..] \
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instead");
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}
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if name.node.as_str() == "as_mut_slice" {
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span_lint(cx, AS_MUT_SLICE, expr.span,
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"used as_mut_slice() from the 'convert' nightly feature. Use &mut [..] \
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instead");
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}
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}
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}
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}
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