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Suggest correct place to add self
parameter when inside closure
It would incorrectly suggest adding it as a parameter to the closure instead of the containing function.
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@ -369,7 +369,7 @@ struct DiagnosticMetadata<'ast> {
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/// param.
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currently_processing_generics: bool,
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/// The current enclosing function (used for better errors).
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/// The current enclosing (non-closure) function (used for better errors).
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current_function: Option<(FnKind<'ast>, Span)>,
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/// A list of labels as of yet unused. Labels will be removed from this map when
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@ -515,8 +515,10 @@ impl<'a: 'ast, 'ast> Visitor<'ast> for LateResolutionVisitor<'a, '_, 'ast> {
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FnKind::Fn(FnCtxt::Assoc(_), ..) => NormalRibKind,
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FnKind::Closure(..) => ClosureOrAsyncRibKind,
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};
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let previous_value =
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replace(&mut self.diagnostic_metadata.current_function, Some((fn_kind, sp)));
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let previous_value = self.diagnostic_metadata.current_function;
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if matches!(fn_kind, FnKind::Fn(..)) {
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self.diagnostic_metadata.current_function = Some((fn_kind, sp));
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}
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debug!("(resolving function) entering function");
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let declaration = fn_kind.decl();
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@ -10,6 +10,10 @@ impl Foo {
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fn baz(_: i32) {
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self.bar(); //~ ERROR E0424
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}
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fn qux() {
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let _ = || self.bar(); //~ ERROR E0424
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}
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}
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fn main () {
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@ -24,14 +24,27 @@ help: add a `self` receiver parameter to make the associated `fn` a method
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LL | fn baz(&self, _: i32) {
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| ^^^^^^
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error[E0424]: expected value, found module `self`
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--> $DIR/E0424.rs:15:20
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LL | fn qux() {
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| --- this function doesn't have a `self` parameter
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LL | let _ = || self.bar();
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| ^^^^ `self` value is a keyword only available in methods with a `self` parameter
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help: add a `self` receiver parameter to make the associated `fn` a method
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LL | fn qux(&self) {
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| ^^^^^
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error[E0424]: expected unit struct, unit variant or constant, found module `self`
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--> $DIR/E0424.rs:16:9
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--> $DIR/E0424.rs:20:9
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LL | fn main () {
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| ---- this function can't have a `self` parameter
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LL | let self = "self";
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| ^^^^ `self` value is a keyword and may not be bound to variables or shadowed
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error: aborting due to 3 previous errors
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error: aborting due to 4 previous errors
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For more information about this error, try `rustc --explain E0424`.
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@ -5,6 +5,9 @@ trait B <A> {
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fn b(x: i32) {
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this.b(x); //~ ERROR cannot find value `this` in this scope
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}
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fn c() {
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let _ = || this.a; //~ ERROR cannot find value `this` in this scope
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}
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}
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fn main() {}
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@ -28,6 +28,21 @@ help: if you meant to use `self`, you are also missing a `self` receiver argumen
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LL | fn b(&self, x: i32) {
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| ^^^^^^
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error: aborting due to 2 previous errors
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error[E0425]: cannot find value `this` in this scope
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--> $DIR/issue-5099.rs:9:20
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LL | let _ = || this.a;
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| ^^^^ not found in this scope
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help: you might have meant to use `self` here instead
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LL | let _ = || self.a;
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| ^^^^
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help: if you meant to use `self`, you are also missing a `self` receiver argument
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LL | fn c(&self) {
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| ^^^^^
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error: aborting due to 3 previous errors
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For more information about this error, try `rustc --explain E0425`.
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