[API Proposal]: IL Emit support for FunctionPointer

[steveharter]

[primarily a placeholder for now for planning]

This adds invoke capability to function pointers, layering on See also #69273 and #75347.

Overloads will be added to ILGenerator.EmitCalli() to support new calling conventions that are modifier-based instead of enum-based. The enum-based calling conventions through System.Runtime.InteropServices.CallingConvention have not scaled well thus specifying "CallConv" types from the System.Runtime.InteropServices is assumed. Currently these include:

• CallConvCdecl
• CallConvStdCall
• CallConvThiscall
• CallConvFastcall
• CallConvSuppressGCTransition
• CallConvMemberFunction

The new APIs may likely take a proposed MethodSignature class from #75347.

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Issue Details

---

[primarily a placeholder for now for planning]

This adds invoke capability to function pointers, layering on See also #69273 and #75347.

Overloads will be added to ILGenerator.EmitCalli() to support new calling conventions that are modifier-based instead of enum-based. The enum-based calling conventions through System.Runtime.InteropServices.CallingConvention have not scaled well thus specifying "CallConv" types from the System.Runtime.InteropServices is assumed. Currently these include:

• CallConvCdecl
• CallConvStdCall
• CallConvThiscall
• CallConvFastcall
• CallConvSuppressGCTransition
• CallConvMemberFunction

The new APIs may likely take a proposed MethodSignature class from #75347.

Author:	steveharter
Assignees:	steveharter
Labels:	api-needs-work, area-System.Reflection
Milestone:	8.0.0

[ghost]

Tagging subscribers to this area: @dotnet/area-system-reflection-emit
See info in area-owners.md if you want to be subscribed.

Issue Details

---

[primarily a placeholder for now for planning]

This adds invoke capability to function pointers, layering on See also #69273 and #75347.

Overloads will be added to ILGenerator.EmitCalli() to support new calling conventions that are modifier-based instead of enum-based. The enum-based calling conventions through System.Runtime.InteropServices.CallingConvention have not scaled well thus specifying "CallConv" types from the System.Runtime.InteropServices is assumed. Currently these include:

• CallConvCdecl
• CallConvStdCall
• CallConvThiscall
• CallConvFastcall
• CallConvSuppressGCTransition
• CallConvMemberFunction

The new APIs may likely take a proposed MethodSignature class from #75347.

Author:	steveharter
Assignees:	steveharter
Labels:	api-needs-work, area-System.Reflection, area-System.Reflection.Emit
Milestone:	8.0.0