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Fix Issue 23384 - Suggest calling matching base class method when hidden (#14525)

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* Fix Issue 23384 - Suggest calling matching base class method when hidden

* Update compiler/src/dmd/func.d

Co-authored-by: Dennis <dkorpel@users.noreply.github.com>

Co-authored-by: Dennis <dkorpel@users.noreply.github.com>
This commit is contained in:
Razvan Nitu 2022-10-06 12:39:04 +03:00 • committed by GitHub
parent 4c14051ec6
commit 053e2ee85b
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22
compiler/src/dmd/func.d
View file

@ -3384,6 +3384,28 @@ FuncDeclaration resolveFuncCall(const ref Loc loc, Scope* sc, Dsymbol s,
// re-resolve to check for supplemental message
if (!global.gag || global.params.showGaggedErrors)
{
if (tthis)
{
if (auto classType = tthis.isTypeClass())
{
if (auto baseClass = classType.sym.baseClass)
{
if (auto baseFunction = baseClass.search(baseClass.loc, fd.ident))
{
MatchAccumulator mErr;
functionResolve(mErr, baseFunction, loc, sc, tiargs, baseClass.type, fargs, null);
if (mErr.last > MATCH.nomatch && mErr.lastf)
{
errorSupplemental(loc, "%s `%s` hides base class function `%s`",
fd.kind, fd.toPrettyChars(), mErr.lastf.toPrettyChars());
errorSupplemental(loc, "add `alias %s = %s` to `%s`'s body to merge the overload sets",
fd.toChars(), mErr.lastf.toPrettyChars(), tthis.toChars());
return null;
}
}
}
}
}
const(char)* failMessage;
functionResolve(m, orig_s, loc, sc, tiargs, tthis, fargs, &failMessage);
if (failMessage)

29
compiler/test/fail_compilation/diag23384.d Normal file
View file

@ -0,0 +1,29 @@
// https://issues.dlang.org/show_bug.cgi?id=23384
/*
TEST_OUTPUT:
---
fail_compilation/diag23384.d(28): Error: function `diag23384.Derived.fun(B b)` is not callable using argument types `(A)`
fail_compilation/diag23384.d(28): function `diag23384.Derived.fun` hides base class function `diag23384.Base.fun`
fail_compilation/diag23384.d(28): add `alias fun = diag23384.Base.fun` to `diag23384.Derived`'s body to merge the overload sets
---
*/
struct A {}
struct B {}
class Base
{
void fun(A a) {}
}
class Derived : Base
{
void fun(B b) {}
}
void main()
{
Derived d;
d.fun(A());
}