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Auto merge of #9467 - pyhrr0:macro_expansion, r=giraffate

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Fix `almost_complete_letter_range` false positive.

changelog: Fix [`almost_complete_letter_range`] false positive in an external macro
This commit is contained in:
bors 2022-09-13 23:45:29 +00:00
commit 826a8930e6
5 changed files with 61 additions and 13 deletions
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2
clippy_lints/src/almost_complete_letter_range.rs
View file

@ -4,6 +4,7 @@ use clippy_utils::{meets_msrv, msrvs};
use rustc_ast::ast::{Expr, ExprKind, LitKind, Pat, PatKind, RangeEnd, RangeLimits};
use rustc_errors::Applicability;
use rustc_lint::{EarlyContext, EarlyLintPass, LintContext};
use rustc_middle::lint::in_external_macro;
use rustc_semver::RustcVersion;
use rustc_session::{declare_tool_lint, impl_lint_pass};
use rustc_span::Span;
@ -79,6 +80,7 @@ fn check_range(cx: &EarlyContext<'_>, span: Span, start: &Expr, end: &Expr, sugg
(LitKind::Byte(b'a') | LitKind::Char('a'), LitKind::Byte(b'z') | LitKind::Char('z'))
| (LitKind::Byte(b'A') | LitKind::Char('A'), LitKind::Byte(b'Z') | LitKind::Char('Z'))
)
&& !in_external_macro(cx.sess(), span)
{
span_lint_and_then(
cx,

13
tests/ui/almost_complete_letter_range.fixed
View file

@ -1,5 +1,6 @@
// run-rustfix
// edition:2018
// aux-build:macro_rules.rs
#![feature(custom_inner_attributes)]
#![feature(exclusive_range_pattern)]
@ -8,12 +9,21 @@
#![allow(ellipsis_inclusive_range_patterns)]
#![allow(clippy::needless_parens_on_range_literals)]
#[macro_use]
extern crate macro_rules;
macro_rules! a {
() => {
'a'
};
}
macro_rules! b {
() => {
let _ = 'a'..='z';
};
}
fn main() {
#[rustfmt::skip]
{
@ -47,6 +57,9 @@ fn main() {
'B'..'Z' => 4,
_ => 5,
};
almost_complete_letter_range!();
b!();
}
fn _under_msrv() {

13
tests/ui/almost_complete_letter_range.rs
View file

@ -1,5 +1,6 @@
// run-rustfix
// edition:2018
// aux-build:macro_rules.rs
#![feature(custom_inner_attributes)]
#![feature(exclusive_range_pattern)]
@ -8,12 +9,21 @@
#![allow(ellipsis_inclusive_range_patterns)]
#![allow(clippy::needless_parens_on_range_literals)]
#[macro_use]
extern crate macro_rules;
macro_rules! a {
() => {
'a'
};
}
macro_rules! b {
() => {
let _ = 'a'..'z';
};
}
fn main() {
#[rustfmt::skip]
{
@ -47,6 +57,9 @@ fn main() {
'B'..'Z' => 4,
_ => 5,
};
almost_complete_letter_range!();
b!();
}
fn _under_msrv() {

39
tests/ui/almost_complete_letter_range.stderr
View file

@ -1,5 +1,5 @@
error: almost complete ascii letter range
--> $DIR/almost_complete_letter_range.rs:20:17
--> $DIR/almost_complete_letter_range.rs:30:17
|
LL | let _ = ('a') ..'z';
| ^^^^^^--^^^
@ -9,7 +9,7 @@ LL | let _ = ('a') ..'z';
= note: `-D clippy::almost-complete-letter-range` implied by `-D warnings`
error: almost complete ascii letter range
--> $DIR/almost_complete_letter_range.rs:21:17
--> $DIR/almost_complete_letter_range.rs:31:17
|
LL | let _ = 'A' .. ('Z');
| ^^^^--^^^^^^
@ -17,7 +17,7 @@ LL | let _ = 'A' .. ('Z');
| help: use an inclusive range: `..=`
error: almost complete ascii letter range
--> $DIR/almost_complete_letter_range.rs:27:13
--> $DIR/almost_complete_letter_range.rs:37:13
|
LL | let _ = (b'a')..(b'z');
| ^^^^^^--^^^^^^
@ -25,7 +25,7 @@ LL | let _ = (b'a')..(b'z');
| help: use an inclusive range: `..=`
error: almost complete ascii letter range
--> $DIR/almost_complete_letter_range.rs:28:13
--> $DIR/almost_complete_letter_range.rs:38:13
|
LL | let _ = b'A'..b'Z';
| ^^^^--^^^^
@ -33,7 +33,7 @@ LL | let _ = b'A'..b'Z';
| help: use an inclusive range: `..=`
error: almost complete ascii letter range
--> $DIR/almost_complete_letter_range.rs:33:13
--> $DIR/almost_complete_letter_range.rs:43:13
|
LL | let _ = a!()..'z';
| ^^^^--^^^
@ -41,7 +41,7 @@ LL | let _ = a!()..'z';
| help: use an inclusive range: `..=`
error: almost complete ascii letter range
--> $DIR/almost_complete_letter_range.rs:36:9
--> $DIR/almost_complete_letter_range.rs:46:9
|
LL | b'a'..b'z' if true => 1,
| ^^^^--^^^^
@ -49,7 +49,7 @@ LL | b'a'..b'z' if true => 1,
| help: use an inclusive range: `..=`
error: almost complete ascii letter range
--> $DIR/almost_complete_letter_range.rs:37:9
--> $DIR/almost_complete_letter_range.rs:47:9
|
LL | b'A'..b'Z' if true => 2,
| ^^^^--^^^^
@ -57,7 +57,7 @@ LL | b'A'..b'Z' if true => 2,
| help: use an inclusive range: `..=`
error: almost complete ascii letter range
--> $DIR/almost_complete_letter_range.rs:44:9
--> $DIR/almost_complete_letter_range.rs:54:9
|
LL | 'a'..'z' if true => 1,
| ^^^--^^^
@ -65,7 +65,7 @@ LL | 'a'..'z' if true => 1,
| help: use an inclusive range: `..=`
error: almost complete ascii letter range
--> $DIR/almost_complete_letter_range.rs:45:9
--> $DIR/almost_complete_letter_range.rs:55:9
|
LL | 'A'..'Z' if true => 2,
| ^^^--^^^
@ -73,7 +73,20 @@ LL | 'A'..'Z' if true => 2,
| help: use an inclusive range: `..=`
error: almost complete ascii letter range
--> $DIR/almost_complete_letter_range.rs:55:9
--> $DIR/almost_complete_letter_range.rs:23:17
|
LL | let _ = 'a'..'z';
| ^^^--^^^
| |
| help: use an inclusive range: `..=`
...
LL | b!();
| ---- in this macro invocation
|
= note: this error originates in the macro `b` (in Nightly builds, run with -Z macro-backtrace for more info)
error: almost complete ascii letter range
--> $DIR/almost_complete_letter_range.rs:68:9
|
LL | 'a'..'z' => 1,
| ^^^--^^^
@ -81,7 +94,7 @@ LL | 'a'..'z' => 1,
| help: use an inclusive range: `...`
error: almost complete ascii letter range
--> $DIR/almost_complete_letter_range.rs:62:13
--> $DIR/almost_complete_letter_range.rs:75:13
|
LL | let _ = 'a'..'z';
| ^^^--^^^
@ -89,12 +102,12 @@ LL | let _ = 'a'..'z';
| help: use an inclusive range: `..=`
error: almost complete ascii letter range
--> $DIR/almost_complete_letter_range.rs:64:9
--> $DIR/almost_complete_letter_range.rs:77:9
|
LL | 'a'..'z' => 1,
| ^^^--^^^
| |
| help: use an inclusive range: `..=`
error: aborting due to 12 previous errors
error: aborting due to 13 previous errors

7
tests/ui/auxiliary/macro_rules.rs
View file

@ -140,3 +140,10 @@ macro_rules! manual_rem_euclid {
macro_rules! equatable_if_let {
($a:ident) => {{ if let 2 = $a {} }};
}
#[macro_export]
macro_rules! almost_complete_letter_range {
() => {
let _ = 'a'..'z';
};
}