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field_reassign_with_default: don't expand macros in suggestion

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fixes #6522

changelog: field_reassign_with_default: don't expand macros in lint suggestion (#6522)
This commit is contained in:
Matthias Krüger 2021-01-01 16:59:59 +01:00
parent 60919e416d
commit 5d48b91b40
3 changed files with 48 additions and 25 deletions
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6
clippy_lints/src/default.rs
View file

@ -1,4 +1,6 @@
use crate::utils::{any_parent_is_automatically_derived, contains_name, match_def_path, paths, qpath_res, snippet};
use crate::utils::{
any_parent_is_automatically_derived, contains_name, match_def_path, paths, qpath_res, snippet_with_macro_callsite,
};
use crate::utils::{span_lint_and_note, span_lint_and_sugg};
use if_chain::if_chain;
use rustc_data_structures::fx::FxHashSet;
@ -187,7 +189,7 @@ impl LateLintPass<'_> for Default {
.into_iter()
.map(|(field, rhs)| {
// extract and store the assigned value for help message
let value_snippet = snippet(cx, rhs.span, "..");
let value_snippet = snippet_with_macro_callsite(cx, rhs.span, "..");
format!("{}: {}", field, value_snippet)
})
.collect::<Vec<String>>()

9
tests/ui/field_reassign_with_default.rs
View file

@ -11,6 +11,11 @@ struct B {
j: i64,
}
#[derive(Default)]
struct C {
i: Vec<i32>,
j: i64,
}
/// Implements .next() that returns a different number each time.
struct SideEffect(i32);
@ -111,6 +116,10 @@ fn main() {
// don't lint - some private fields
let mut x = m::F::default();
x.a = 1;
// don't expand macros in the suggestion (#6522)
let mut a: C = C::default();
a.i = vec![1];
}
mod m {

58
tests/ui/field_reassign_with_default.stderr
View file

@ -1,24 +1,12 @@
error: field assignment outside of initializer for an instance created with Default::default()
--> $DIR/field_reassign_with_default.rs:30:5
--> $DIR/field_reassign_with_default.rs:35:5
|
LL | a.i = 42;
| ^^^^^^^^^
|
= note: `-D clippy::field-reassign-with-default` implied by `-D warnings`
note: consider initializing the variable with `A { i: 42, ..Default::default() }` and removing relevant reassignments
--> $DIR/field_reassign_with_default.rs:29:5
|
LL | let mut a: A = Default::default();
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
error: field assignment outside of initializer for an instance created with Default::default()
--> $DIR/field_reassign_with_default.rs:70:5
|
LL | a.j = 43;
| ^^^^^^^^^
|
note: consider initializing the variable with `A { j: 43, i: 42 }` and removing relevant reassignments
--> $DIR/field_reassign_with_default.rs:69:5
--> $DIR/field_reassign_with_default.rs:34:5
|
LL | let mut a: A = Default::default();
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
@ -26,50 +14,74 @@ LL | let mut a: A = Default::default();
error: field assignment outside of initializer for an instance created with Default::default()
--> $DIR/field_reassign_with_default.rs:75:5
|
LL | a.i = 42;
LL | a.j = 43;
| ^^^^^^^^^
|
note: consider initializing the variable with `A { i: 42, j: 44 }` and removing relevant reassignments
note: consider initializing the variable with `A { j: 43, i: 42 }` and removing relevant reassignments
--> $DIR/field_reassign_with_default.rs:74:5
|
LL | let mut a: A = Default::default();
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
error: field assignment outside of initializer for an instance created with Default::default()
--> $DIR/field_reassign_with_default.rs:81:5
--> $DIR/field_reassign_with_default.rs:80:5
|
LL | a.i = 42;
| ^^^^^^^^^
|
note: consider initializing the variable with `A { i: 42, j: 44 }` and removing relevant reassignments
--> $DIR/field_reassign_with_default.rs:79:5
|
LL | let mut a: A = Default::default();
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
error: field assignment outside of initializer for an instance created with Default::default()
--> $DIR/field_reassign_with_default.rs:86:5
|
LL | a.i = 42;
| ^^^^^^^^^
|
note: consider initializing the variable with `A { i: 42, ..Default::default() }` and removing relevant reassignments
--> $DIR/field_reassign_with_default.rs:80:5
--> $DIR/field_reassign_with_default.rs:85:5
|
LL | let mut a = A::default();
| ^^^^^^^^^^^^^^^^^^^^^^^^^
error: field assignment outside of initializer for an instance created with Default::default()
--> $DIR/field_reassign_with_default.rs:91:5
--> $DIR/field_reassign_with_default.rs:96:5
|
LL | a.i = Default::default();
| ^^^^^^^^^^^^^^^^^^^^^^^^^
|
note: consider initializing the variable with `A { i: Default::default(), ..Default::default() }` and removing relevant reassignments
--> $DIR/field_reassign_with_default.rs:90:5
--> $DIR/field_reassign_with_default.rs:95:5
|
LL | let mut a: A = Default::default();
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
error: field assignment outside of initializer for an instance created with Default::default()
--> $DIR/field_reassign_with_default.rs:95:5
--> $DIR/field_reassign_with_default.rs:100:5
|
LL | a.i = Default::default();
| ^^^^^^^^^^^^^^^^^^^^^^^^^
|
note: consider initializing the variable with `A { i: Default::default(), j: 45 }` and removing relevant reassignments
--> $DIR/field_reassign_with_default.rs:94:5
--> $DIR/field_reassign_with_default.rs:99:5
|
LL | let mut a: A = Default::default();
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
error: aborting due to 6 previous errors
error: field assignment outside of initializer for an instance created with Default::default()
--> $DIR/field_reassign_with_default.rs:122:5
|
LL | a.i = vec![1];
| ^^^^^^^^^^^^^^
|
note: consider initializing the variable with `C { i: vec![1], ..Default::default() }` and removing relevant reassignments
--> $DIR/field_reassign_with_default.rs:121:5
|
LL | let mut a: C = C::default();
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
error: aborting due to 7 previous errors