[Issue 20586] New: Ambiguous overload set with default parameter gives confusing error message
d-bugmail at puremagic.com
d-bugmail at puremagic.com
Wed Feb 19 09:12:42 UTC 2020
https://issues.dlang.org/show_bug.cgi?id=20586
Issue ID: 20586
Summary: Ambiguous overload set with default parameter gives
confusing error message
Product: D
Version: D2
Hardware: All
OS: All
Status: NEW
Keywords: diagnostic
Severity: minor
Priority: P1
Component: dmd
Assignee: nobody at puremagic.com
Reporter: pro.mathias.lang at gmail.com
The following code:
```
void main () nothrow
{
foo("hello");
}
void foo (string) @system nothrow {}
void foo (string) @safe { }
```
Results in the following error message:
```
test.d(3): Error: test.foo called with argument types (string) matches both:
test.d(6): test.foo(string)
and:
test.d(7): test.foo(string)
```
But when changing the definition of `foo` to:
```
void foo (string, float f = 42) @system nothrow {}
void foo (string, int a = 42) @safe { }
```
We get:
```
test.d(6): Error: function nope.foo is not nothrow
test.d(1): Error: nothrow function D main may throw
```
Which, if a user expect overloading to work with different attributes, is
confusing.
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