http://d.puremagic.com/issues/show_bug.cgi?id=11207
Summary: improve implicit conversions of function
pointers/delegates
Product: D
Version: D2
Platform: All
OS/Version: All
Status: NEW
Severity: major
Priority: P2
Component: DMD
AssignedTo: [email protected]
ReportedBy: [email protected]
--- Comment #0 from Eberhard <[email protected]> 2013-10-09 08:03:07 PDT
---
class A {}
class B : A {}
B foo(const A) { return null; }
void main() {
A function(const A) f1 = &foo; // compiles
B function(A) f2 = &foo; // does not compile
B function(immutable A) f3 = &foo; // does not compile
B function(B) f4 = &foo; // does not compile
}
test.d(6): Error: cannot implicitly convert expression (& foo) of type B
function(const(A) _param_0) to B function(A)
test.d(7): Error: cannot implicitly convert expression (& foo) of type B
function(const(A) _param_0) to B function(immutable(A))
test.d(8): Error: cannot implicitly convert expression (& foo) of type B
function(const(A) _param_0) to B function(B)
These implicit conversions should be possible. Explicit casting is too
confusing and dangerous. If you make a mistake, you will end up with serious
runtime errors.
--
Configure issuemail: http://d.puremagic.com/issues/userprefs.cgi?tab=email
------- You are receiving this mail because: -------
