SYSLIB1045 Use GeneratedRegex auto-correct causes CS0756 multiple defining declarations #77409
Description
Description
If A.cs and B.cs both have public partial class C and both have methods needing a new Regex() -> [GeneratedRegex] replacement, the source generator fix puts MyRegex() in both files, which causes a compilation error. I invoked the fix by running dotnet-format project.csproj --diagnostics SYSLIB1045 --no-restore.
Reproduction Steps
using System.Text.RegularExpressions;
namespace RegexReplacement
{
internal class Program
{
static void Main(string[] args)
{
Console.WriteLine("Hello, World!");
}
}
internal partial class C
{
public static Regex A()
{
var r = new Regex("abc");
return r;
}
}
internal partial class C
{
public static Regex B()
{
var r = new Regex("def");
return r;
}
}
}
Expected behavior
using System.Text.RegularExpressions;
namespace RegexReplacement
{
internal class Program
{
static void Main(string[] args)
{
Console.WriteLine("Hello, World!");
}
}
internal partial class C
{
public static Regex A()
{
var r = MyRegex();
return r;
}
[GeneratedRegex("abc")]
private static partial Regex MyRegex();
}
internal partial class C
{
public static Regex B()
{
var r = MyRegex();
return r;
}
[GeneratedRegex("def")]
private static partial Regex MyRegex2();
}
}
Actual behavior
using System.Text.RegularExpressions;
namespace RegexReplacement
{
internal class Program
{
static void Main(string[] args)
{
Console.WriteLine("Hello, World!");
}
}
internal partial class C
{
public static Regex A()
{
var r = MyRegex();
return r;
}
[GeneratedRegex("abc")]
private static partial Regex MyRegex();
}
internal partial class C
{
public static Regex B()
{
var r = MyRegex();
return r;
}
[GeneratedRegex("def")]
private static partial Regex MyRegex();
}
}
Regression?
no
Known Workarounds
manual fix
Configuration
$ dotnet-format --version
7.0.351204+c1136d16ab588f45727fe908212b90578edc2aff
7.0.100-rc.1.22431.12 [C:\Program Files\dotnet\sdk]
Other information
No response