Regression in 2.3.2: optional enum default value is emitted as int literal, causing CS1503

[YoshihiroIto]

Summary

After upgrading Pure.DI from 2.3.1 to 2.3.2, code generation fails to compile when a constructor has an optional
enum parameter with a non-zero default value.

Compiler error:

CS1503: Argument 8: cannot convert from 'int' to 'Repro.Domain.FileItemFormats'

Repro repository

https://github.com/YoshihiroIto/PureDI-2.3.2-EnumDefault

Regression range

• 2.3.1: works
• 2.3.2: fails

Steps to reproduce

1. Clone the repro:

git clone https://github.com/YoshihiroIto/PureDI-2.3.2-EnumDefault.git
cd PureDI-2.3.2-EnumDefault

2. Build with 2.3.2:

dotnet build PureDI.EnumDefault.Repro.csproj -c Release -p:PureDiVersion=2.3.2

3. Observe failure:

error CS1503: Argument 8: cannot convert from 'int' to 'Repro.Domain.FileItemFormats'

4. Build the exact same source with 2.3.1:

dotnet build PureDI.EnumDefault.Repro.csproj -c Release -p:PureDiVersion=2.3.1

5. Observe build succeeds.

Actual behavior

In 2.3.2, generated Composition.g.cs includes a raw int literal for the optional enum parameter:

return new global::Service(new global::Dependency1(), new global::Dependency2(), new global::Dependency3(), new
global::Dependency4(), new global::Dependency5(), new global::Dependency6(), new global::Dependency7(), 7);

This fails because the parameter type is Repro.Domain.FileItemFormats.

Expected behavior

Generated code should remain type-safe for optional enum parameters, e.g. by:

• omitting the optional parameter, or
• emitting a typed enum value/cast instead of raw int.

Environment

• OS: Windows
• .NET SDK: 10.0.103
• Target framework: net10.0

[NikolayPianikov]

@YoshihiroIto thanks for the repo to reproduce the problem

[NikolayPianikov]

Fixed in https://github.com/DevTeam/Pure.DI/releases/tag/2.3.3

[YoshihiroIto]

@NikolayPianikov
It works perfectly now! Thank you so much.