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https://github.com/rust-lang/rust-clippy
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commit
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6 changed files with 1461 additions and 0 deletions
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@ -4641,6 +4641,7 @@ Released 2018-09-13
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[`await_holding_lock`]: https://rust-lang.github.io/rust-clippy/master/index.html#await_holding_lock
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[`await_holding_refcell_ref`]: https://rust-lang.github.io/rust-clippy/master/index.html#await_holding_refcell_ref
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[`bad_bit_mask`]: https://rust-lang.github.io/rust-clippy/master/index.html#bad_bit_mask
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[`big_endian_bytes`]: https://rust-lang.github.io/rust-clippy/master/index.html#big_endian_bytes
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[`bind_instead_of_map`]: https://rust-lang.github.io/rust-clippy/master/index.html#bind_instead_of_map
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[`blacklisted_name`]: https://rust-lang.github.io/rust-clippy/master/index.html#blacklisted_name
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[`blanket_clippy_restriction_lints`]: https://rust-lang.github.io/rust-clippy/master/index.html#blanket_clippy_restriction_lints
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@ -4811,6 +4812,7 @@ Released 2018-09-13
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[`get_first`]: https://rust-lang.github.io/rust-clippy/master/index.html#get_first
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[`get_last_with_len`]: https://rust-lang.github.io/rust-clippy/master/index.html#get_last_with_len
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[`get_unwrap`]: https://rust-lang.github.io/rust-clippy/master/index.html#get_unwrap
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[`host_endian_bytes`]: https://rust-lang.github.io/rust-clippy/master/index.html#host_endian_bytes
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[`identity_conversion`]: https://rust-lang.github.io/rust-clippy/master/index.html#identity_conversion
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[`identity_op`]: https://rust-lang.github.io/rust-clippy/master/index.html#identity_op
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[`if_let_mutex`]: https://rust-lang.github.io/rust-clippy/master/index.html#if_let_mutex
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@ -4892,6 +4894,7 @@ Released 2018-09-13
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[`let_with_type_underscore`]: https://rust-lang.github.io/rust-clippy/master/index.html#let_with_type_underscore
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[`lines_filter_map_ok`]: https://rust-lang.github.io/rust-clippy/master/index.html#lines_filter_map_ok
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[`linkedlist`]: https://rust-lang.github.io/rust-clippy/master/index.html#linkedlist
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[`little_endian_bytes`]: https://rust-lang.github.io/rust-clippy/master/index.html#little_endian_bytes
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[`logic_bug`]: https://rust-lang.github.io/rust-clippy/master/index.html#logic_bug
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[`lossy_float_literal`]: https://rust-lang.github.io/rust-clippy/master/index.html#lossy_float_literal
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[`macro_use_imports`]: https://rust-lang.github.io/rust-clippy/master/index.html#macro_use_imports
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@ -143,6 +143,9 @@ pub(crate) static LINTS: &[&crate::LintInfo] = &[
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crate::empty_drop::EMPTY_DROP_INFO,
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crate::empty_enum::EMPTY_ENUM_INFO,
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crate::empty_structs_with_brackets::EMPTY_STRUCTS_WITH_BRACKETS_INFO,
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crate::endian_bytes::BIG_ENDIAN_BYTES_INFO,
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crate::endian_bytes::HOST_ENDIAN_BYTES_INFO,
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crate::endian_bytes::LITTLE_ENDIAN_BYTES_INFO,
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crate::entry::MAP_ENTRY_INFO,
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crate::enum_clike::ENUM_CLIKE_UNPORTABLE_VARIANT_INFO,
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crate::enum_variants::ENUM_VARIANT_NAMES_INFO,
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138
clippy_lints/src/endian_bytes.rs
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138
clippy_lints/src/endian_bytes.rs
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@ -0,0 +1,138 @@
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use clippy_utils::{
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diagnostics::{span_lint_and_help, span_lint_and_then},
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is_lint_allowed, match_def_path, path_def_id,
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};
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use rustc_hir::{Expr, ExprKind};
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use rustc_lint::{LateContext, LateLintPass};
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use rustc_session::{declare_lint_pass, declare_tool_lint};
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declare_clippy_lint! {
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/// ### What it does
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///
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/// ### Why is this bad?
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///
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/// ### Example
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/// ```rust
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/// // example code where clippy issues a warning
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/// ```
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/// Use instead:
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/// ```rust
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/// // example code which does not raise clippy warning
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/// ```
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#[clippy::version = "1.71.0"]
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pub HOST_ENDIAN_BYTES,
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restriction,
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"disallows usage of the `to_ne_bytes` method"
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}
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declare_clippy_lint! {
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/// ### What it does
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/// Checks for the usage of the `to_ne_bytes` method.
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///
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/// ### Why is this bad?
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/// It's not, but some may prefer to specify the target endianness explicitly.
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///
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/// ### Example
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/// ```rust,ignore
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/// let _x = 2i32.to_ne_bytes();
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/// let _y = 2i64.to_ne_bytes();
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/// ```
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#[clippy::version = "1.71.0"]
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pub LITTLE_ENDIAN_BYTES,
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restriction,
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"disallows usage of the `to_le_bytes` method"
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}
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declare_clippy_lint! {
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/// ### What it does
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/// Checks for the usage of the `to_le_bytes` method.
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///
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/// ### Why is this bad?
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///
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/// ### Example
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/// ```rust,ignore
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/// // example code where clippy issues a warning
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/// ```
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#[clippy::version = "1.71.0"]
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pub BIG_ENDIAN_BYTES,
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restriction,
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"disallows usage of the `to_be_bytes` method"
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}
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declare_lint_pass!(EndianBytes => [HOST_ENDIAN_BYTES, LITTLE_ENDIAN_BYTES, BIG_ENDIAN_BYTES]);
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impl LateLintPass<'_> for EndianBytes {
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fn check_expr(&mut self, cx: &LateContext<'_>, expr: &Expr<'_>) {
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if_chain! {
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if let ExprKind::MethodCall(method_name, receiver, args, ..) = expr.kind;
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if let ExprKind::Lit(..) = receiver.kind;
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if args.is_empty();
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then {
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if method_name.ident.name == sym!(to_ne_bytes) {
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span_lint_and_help(
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cx,
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HOST_ENDIAN_BYTES,
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expr.span,
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"use of the method `to_ne_bytes`",
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None,
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"consider specifying the desired endianness",
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);
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} else if method_name.ident.name == sym!(to_le_bytes) {
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span_lint_and_then(cx, LITTLE_ENDIAN_BYTES, expr.span, "use of the method `to_le_bytes`", |diag| {
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if is_lint_allowed(cx, BIG_ENDIAN_BYTES, expr.hir_id) {
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diag.help("use `to_be_bytes` instead");
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}
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});
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} else if method_name.ident.name == sym!(to_be_bytes) {
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span_lint_and_then(cx, BIG_ENDIAN_BYTES, expr.span, "use of the method `to_be_bytes`", |diag| {
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if is_lint_allowed(cx, LITTLE_ENDIAN_BYTES, expr.hir_id) {
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diag.help("use `to_le_bytes` instead");
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}
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});
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}
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// don't waste time also checking from_**_bytes
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return;
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}
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}
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span_lint_and_help(
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cx,
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HOST_ENDIAN_BYTES,
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expr.span,
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"use of the method `from_ne_bytes`",
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None,
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&format!("consider specifying the desired endianness: {expr:?}"),
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);
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if_chain! {
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if let ExprKind::Call(function, args) = expr.kind;
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if let Some(function_def_id) = path_def_id(cx, function);
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if args.len() == 1;
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then {
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if match_def_path(cx, function_def_id, &["from_ne_bytes"]) {
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span_lint_and_help(
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cx,
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HOST_ENDIAN_BYTES,
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expr.span,
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"use of the method `from_ne_bytes`",
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None,
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"consider specifying the desired endianness",
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);
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} else if match_def_path(cx, function_def_id, &["from_le_bytes"]) {
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span_lint_and_then(cx, LITTLE_ENDIAN_BYTES, expr.span, "use of the method `from_le_bytes`", |diag| {
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if is_lint_allowed(cx, BIG_ENDIAN_BYTES, expr.hir_id) {
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diag.help("use `from_be_bytes` instead");
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}
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});
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} else if match_def_path(cx, function_def_id, &["from_be_bytes"]) {
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span_lint_and_then(cx, BIG_ENDIAN_BYTES, expr.span, "use of the method `from_be_bytes`", |diag| {
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if is_lint_allowed(cx, LITTLE_ENDIAN_BYTES, expr.hir_id) {
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diag.help("use `from_le_bytes` instead");
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}
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});
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}
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}
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}
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}
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}
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@ -114,6 +114,7 @@ mod else_if_without_else;
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mod empty_drop;
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mod empty_enum;
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mod empty_structs_with_brackets;
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mod endian_bytes;
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mod entry;
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mod enum_clike;
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mod enum_variants;
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@ -996,6 +997,7 @@ pub fn register_plugins(store: &mut rustc_lint::LintStore, sess: &Session, conf:
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store.register_late_pass(|_| Box::new(default_constructed_unit_structs::DefaultConstructedUnitStructs));
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store.register_early_pass(|| Box::new(needless_else::NeedlessElse));
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store.register_late_pass(|_| Box::new(missing_fields_in_debug::MissingFieldsInDebug));
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store.register_late_pass(|_| Box::new(endian_bytes::EndianBytes));
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// add lints here, do not remove this comment, it's used in `new_lint`
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}
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163
tests/ui/endian_bytes.rs
Normal file
163
tests/ui/endian_bytes.rs
Normal file
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@ -0,0 +1,163 @@
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#![allow(unused)]
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#![allow(clippy::diverging_sub_expression)]
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#![no_main]
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#[warn(clippy::host_endian_bytes)]
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fn host() {
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2u8.to_ne_bytes();
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2i8.to_ne_bytes();
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2u16.to_ne_bytes();
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2i16.to_ne_bytes();
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2u32.to_ne_bytes();
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2i32.to_ne_bytes();
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2u64.to_ne_bytes();
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2i64.to_ne_bytes();
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2u128.to_ne_bytes();
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2i128.to_ne_bytes();
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2usize.to_ne_bytes();
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2isize.to_ne_bytes();
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2.0f32.to_ne_bytes();
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2.0f64.to_ne_bytes();
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u8::from_ne_bytes(todo!());
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i8::from_ne_bytes(todo!());
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u16::from_ne_bytes(todo!());
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i16::from_ne_bytes(todo!());
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u32::from_ne_bytes(todo!());
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i32::from_ne_bytes(todo!());
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u64::from_ne_bytes(todo!());
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i64::from_ne_bytes(todo!());
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u128::from_ne_bytes(todo!());
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i128::from_ne_bytes(todo!());
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f32::from_ne_bytes(todo!());
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f64::from_ne_bytes(todo!());
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}
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#[warn(clippy::little_endian_bytes)]
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fn little() {
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2u8.to_le_bytes();
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2i8.to_le_bytes();
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2u16.to_le_bytes();
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2i16.to_le_bytes();
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2u32.to_le_bytes();
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2i32.to_le_bytes();
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2u64.to_le_bytes();
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2i64.to_le_bytes();
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2u128.to_le_bytes();
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2i128.to_le_bytes();
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2usize.to_le_bytes();
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2isize.to_le_bytes();
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2.0f32.to_le_bytes();
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2.0f64.to_le_bytes();
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u8::from_le_bytes(todo!());
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i8::from_le_bytes(todo!());
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u16::from_le_bytes(todo!());
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i16::from_le_bytes(todo!());
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u32::from_le_bytes(todo!());
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i32::from_le_bytes(todo!());
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u64::from_le_bytes(todo!());
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i64::from_le_bytes(todo!());
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u128::from_le_bytes(todo!());
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i128::from_le_bytes(todo!());
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usize::from_le_bytes(todo!());
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isize::from_le_bytes(todo!());
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f32::from_le_bytes(todo!());
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f64::from_le_bytes(todo!());
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}
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#[warn(clippy::big_endian_bytes)]
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fn big() {
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2u8.to_be_bytes();
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2i8.to_be_bytes();
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2u16.to_be_bytes();
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2i16.to_be_bytes();
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2u32.to_be_bytes();
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2i32.to_be_bytes();
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2u64.to_be_bytes();
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2i64.to_be_bytes();
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2u128.to_be_bytes();
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2i128.to_be_bytes();
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2.0f32.to_be_bytes();
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2.0f64.to_be_bytes();
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2usize.to_be_bytes();
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2isize.to_be_bytes();
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u8::from_be_bytes(todo!());
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i8::from_be_bytes(todo!());
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u16::from_be_bytes(todo!());
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i16::from_be_bytes(todo!());
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u32::from_be_bytes(todo!());
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i32::from_be_bytes(todo!());
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u64::from_be_bytes(todo!());
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i64::from_be_bytes(todo!());
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u128::from_be_bytes(todo!());
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i128::from_be_bytes(todo!());
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usize::from_be_bytes(todo!());
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isize::from_be_bytes(todo!());
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f32::from_be_bytes(todo!());
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f64::from_be_bytes(todo!());
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}
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#[warn(clippy::little_endian_bytes)]
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#[warn(clippy::big_endian_bytes)]
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fn little_no_help() {
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2u8.to_le_bytes();
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2i8.to_le_bytes();
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2u16.to_le_bytes();
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2i16.to_le_bytes();
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2u32.to_le_bytes();
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2i32.to_le_bytes();
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2u64.to_le_bytes();
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2i64.to_le_bytes();
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2u128.to_le_bytes();
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2i128.to_le_bytes();
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2usize.to_le_bytes();
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2isize.to_le_bytes();
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2.0f32.to_le_bytes();
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2.0f64.to_le_bytes();
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u8::from_le_bytes(todo!());
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i8::from_le_bytes(todo!());
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u16::from_le_bytes(todo!());
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i16::from_le_bytes(todo!());
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u32::from_le_bytes(todo!());
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i32::from_le_bytes(todo!());
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u64::from_le_bytes(todo!());
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i64::from_le_bytes(todo!());
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u128::from_le_bytes(todo!());
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i128::from_le_bytes(todo!());
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usize::from_le_bytes(todo!());
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isize::from_le_bytes(todo!());
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f32::from_le_bytes(todo!());
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f64::from_le_bytes(todo!());
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}
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#[warn(clippy::big_endian_bytes)]
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#[warn(clippy::little_endian_bytes)]
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fn big_no_help() {
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2u8.to_be_bytes();
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2i8.to_be_bytes();
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2u16.to_be_bytes();
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2i16.to_be_bytes();
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2u32.to_be_bytes();
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2i32.to_be_bytes();
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2u64.to_be_bytes();
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2i64.to_be_bytes();
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2u128.to_be_bytes();
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2i128.to_be_bytes();
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2usize.to_be_bytes();
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2isize.to_be_bytes();
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2.0f32.to_be_bytes();
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2.0f64.to_be_bytes();
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u8::from_be_bytes(todo!());
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i8::from_be_bytes(todo!());
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u16::from_be_bytes(todo!());
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i16::from_be_bytes(todo!());
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u32::from_be_bytes(todo!());
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i32::from_be_bytes(todo!());
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u64::from_be_bytes(todo!());
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i64::from_be_bytes(todo!());
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u128::from_be_bytes(todo!());
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i128::from_be_bytes(todo!());
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usize::from_be_bytes(todo!());
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isize::from_be_bytes(todo!());
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f32::from_be_bytes(todo!());
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f64::from_be_bytes(todo!());
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}
|
1152
tests/ui/endian_bytes.stderr
Normal file
1152
tests/ui/endian_bytes.stderr
Normal file
File diff suppressed because one or more lines are too long
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