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map_unit_fn: fix applicability

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This commit is contained in:
Manish Goregaokar 2019-09-25 08:49:23 -07:00
parent 24c283ea12
commit ad0e7c8e7f
3 changed files with 12 additions and 12 deletions
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12
clippy_lints/src/map_unit_fn.rs
View file

@ -217,15 +217,15 @@ fn lint_map_unit_fn(cx: &LateContext<'_, '_>, stmt: &hir::Stmt, expr: &hir::Expr
if is_unit_function(cx, fn_arg) {
let msg = suggestion_msg("function", map_type);
let suggestion = format!(
"if let {0}({1}) = {2} {{ {3}(...) }}",
"if let {0}({binding}) = {1} {{ {2}({binding}) }}",
variant,
let_binding_name(cx, var_arg),
snippet(cx, var_arg.span, "_"),
snippet(cx, fn_arg.span, "_")
snippet(cx, fn_arg.span, "_"),
binding = let_binding_name(cx, var_arg)
);
span_lint_and_then(cx, lint, expr.span, &msg, |db| {
db.span_suggestion(stmt.span, "try this", suggestion, Applicability::Unspecified);
db.span_suggestion(stmt.span, "try this", suggestion, Applicability::MachineApplicable);
});
} else if let Some((binding, closure_expr)) = unit_closure(cx, fn_arg) {
let msg = suggestion_msg("closure", map_type);
@ -250,9 +250,9 @@ fn lint_map_unit_fn(cx: &LateContext<'_, '_>, stmt: &hir::Stmt, expr: &hir::Expr
"if let {0}({1}) = {2} {{ ... }}",
variant,
snippet(cx, binding.pat.span, "_"),
snippet(cx, var_arg.span, "_")
snippet(cx, var_arg.span, "_"),
);
db.span_suggestion(stmt.span, "try this", suggestion, Applicability::Unspecified);
db.span_suggestion(stmt.span, "try this", suggestion, Applicability::HasPlaceholders);
}
});
}

6
tests/ui/option_map_unit_fn_fixable.stderr
View file

@ -4,7 +4,7 @@ error: called `map(f)` on an Option value where `f` is a unit function
LL | x.field.map(do_nothing);
| ^^^^^^^^^^^^^^^^^^^^^^^-
| |
| help: try this: `if let Some(x_field) = x.field { do_nothing(...) }`
| help: try this: `if let Some(x_field) = x.field { do_nothing(x_field) }`
|
= note: `-D clippy::option-map-unit-fn` implied by `-D warnings`
@ -14,7 +14,7 @@ error: called `map(f)` on an Option value where `f` is a unit function
LL | x.field.map(do_nothing);
| ^^^^^^^^^^^^^^^^^^^^^^^-
| |
| help: try this: `if let Some(x_field) = x.field { do_nothing(...) }`
| help: try this: `if let Some(x_field) = x.field { do_nothing(x_field) }`
error: called `map(f)` on an Option value where `f` is a unit function
--> $DIR/option_map_unit_fn_fixable.rs:36:5
@ -22,7 +22,7 @@ error: called `map(f)` on an Option value where `f` is a unit function
LL | x.field.map(diverge);
| ^^^^^^^^^^^^^^^^^^^^-
| |
| help: try this: `if let Some(x_field) = x.field { diverge(...) }`
| help: try this: `if let Some(x_field) = x.field { diverge(x_field) }`
error: called `map(f)` on an Option value where `f` is a unit closure
--> $DIR/option_map_unit_fn_fixable.rs:42:5

6
tests/ui/result_map_unit_fn_fixable.stderr
View file

@ -4,7 +4,7 @@ error: called `map(f)` on an Result value where `f` is a unit function
LL | x.field.map(do_nothing);
| ^^^^^^^^^^^^^^^^^^^^^^^-
| |
| help: try this: `if let Ok(x_field) = x.field { do_nothing(...) }`
| help: try this: `if let Ok(x_field) = x.field { do_nothing(x_field) }`
|
= note: `-D clippy::result-map-unit-fn` implied by `-D warnings`
@ -14,7 +14,7 @@ error: called `map(f)` on an Result value where `f` is a unit function
LL | x.field.map(do_nothing);
| ^^^^^^^^^^^^^^^^^^^^^^^-
| |
| help: try this: `if let Ok(x_field) = x.field { do_nothing(...) }`
| help: try this: `if let Ok(x_field) = x.field { do_nothing(x_field) }`
error: called `map(f)` on an Result value where `f` is a unit function
--> $DIR/result_map_unit_fn_fixable.rs:38:5
@ -22,7 +22,7 @@ error: called `map(f)` on an Result value where `f` is a unit function
LL | x.field.map(diverge);
| ^^^^^^^^^^^^^^^^^^^^-
| |
| help: try this: `if let Ok(x_field) = x.field { diverge(...) }`
| help: try this: `if let Ok(x_field) = x.field { diverge(x_field) }`
error: called `map(f)` on an Result value where `f` is a unit closure
--> $DIR/result_map_unit_fn_fixable.rs:44:5