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Add C#14 extension members#148

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PhenX merged 5 commits intoEFNext:masterfrom
PhenX:copilot/add-csharp-14-extension-members
Feb 14, 2026
Merged

Add C#14 extension members#148
PhenX merged 5 commits intoEFNext:masterfrom
PhenX:copilot/add-csharp-14-extension-members

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@PhenX PhenX commented Jan 14, 2026

Fixes #141

Copilot AI and others added 3 commits January 14, 2026 20:52
Co-authored-by: PhenX <42170+PhenX@users.noreply.github.com>
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Pull request overview

This pull request adds support for C# 14 extension members to the EntityFrameworkCore.Projectables source generator. Extension members are a new C# 14 feature that allow defining members within an extension() block, providing a more natural syntax for extending types compared to traditional extension methods.

Changes:

  • Updated Microsoft.CodeAnalysis.CSharp to version 5.0.0 to support C# 14 features
  • Modified the source generator to detect and process extension members using the IsExtension property
  • Added logic to rewrite extension parameter references (e.g., e) to @this in generated expressions
  • Added comprehensive test coverage including generator tests and functional tests for extension member properties, methods, and methods with parameters

Reviewed changes

Copilot reviewed 22 out of 22 changed files in this pull request and generated 2 comments.

Show a summary per file
File Description
Directory.Packages.props Updated Microsoft.CodeAnalysis.CSharp from 4.11.0 to 5.0.0
Directory.Build.props Added conditional LangVersion 14.0 for net10.0 target framework
ProjectableInterpreter.cs Added extension member detection and handling logic with helper methods
ExpressionSyntaxRewriter.cs Added extension parameter name tracking and identifier replacement
ProjectionExpressionGeneratorTests.cs Added 5 generator tests for extension member scenarios (NET10_0_OR_GREATER)
ExtensionMemberTests.cs Added 2 functional tests for extension member methods
EntityExtensions.cs Added extension member definitions for Entity and int types
Entity.cs Added Entity class for extension member testing
Various .verified.txt files Expected output verification files for all new tests

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@PhenX PhenX requested a review from koenbeuk January 15, 2026 08:12
@PhenX PhenX changed the title Copilot/add csharp 14 extension members Add csharp 14 extension members Jan 15, 2026
@PhenX PhenX changed the title Add csharp 14 extension members Add C#14 extension members Jan 15, 2026
@PhenX PhenX self-assigned this Jan 24, 2026
fabien.menager and others added 2 commits February 14, 2026 15:39
# Conflicts:
#	src/EntityFrameworkCore.Projectables.Generator/ProjectableInterpreter.cs
Co-authored-by: PhenX <42170+PhenX@users.noreply.github.com>
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Pull request overview

Copilot reviewed 22 out of 22 changed files in this pull request and generated 2 comments.


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@PhenX PhenX merged commit e5d5d2e into EFNext:master Feb 14, 2026
10 checks passed
@PhenX PhenX added this to the v6.0.0 milestone Feb 15, 2026
github-merge-queue bot pushed a commit to DFE-Digital/teaching-record-system that referenced this pull request Mar 27, 2026
Updated
[EntityFrameworkCore.Projectables](https://github.com/EFNext/EntityFrameworkCore.Projectables)
from 5.0.2 to 6.0.0.

<details>
<summary>Release notes</summary>

_Sourced from [EntityFrameworkCore.Projectables's
releases](https://github.com/EFNext/EntityFrameworkCore.Projectables/releases)._

## 6.0.0

## What's Changed

### Major changes

* Add support for projectable method overloads by @​PhenX in
EFNext/EntityFrameworkCore.Projectables#143
* Add C#​14 extension members by @​PhenX in
EFNext/EntityFrameworkCore.Projectables#148
* Support explicitly implemented interface members and default interface
properties by @​rhodon-jargon in
EFNext/EntityFrameworkCore.Projectables#135
* Support block-bodied members with [Projectable] attribute by @​Copilot
in EFNext/EntityFrameworkCore.Projectables#152
* Add ExpandEnumMethods to expand enum extension calls into ternary
expressions by @​Copilot in
EFNext/EntityFrameworkCore.Projectables#150
* Add support for pattern matching in various cases by @​PhenX in
EFNext/EntityFrameworkCore.Projectables#158
* Add support for projectable constructors by @​PhenX in
EFNext/EntityFrameworkCore.Projectables#161
* AOT-compatible static projection registry + SyntaxFactory-based
emission by @​Copilot in
EFNext/EntityFrameworkCore.Projectables#166
* Improve UseMemberBody and add new diagnostics by @​PhenX in
EFNext/EntityFrameworkCore.Projectables#174
* Add code fixes for EFP0001, EFP0002 and EFP0008, with tests by @​PhenX
in EFNext/EntityFrameworkCore.Projectables#181
* Add a code fixer and a code refactorer to transform factory methods
into constructors by @​PhenX in
EFNext/EntityFrameworkCore.Projectables#183
* Improve source generator and analyzer responsiveness by @​PhenX in
EFNext/EntityFrameworkCore.Projectables#171
* Docs website by @​PhenX in
EFNext/EntityFrameworkCore.Projectables#194
* Implement global MSBuild defaults for [Projectable] options by
@​koenbeuk in
EFNext/EntityFrameworkCore.Projectables#191

### Other changes

* Check source generator output compilation by @​PhenX in
EFNext/EntityFrameworkCore.Projectables#156
* Fix GetImplementingProperty issue when using interfaces by @​PhenX in
EFNext/EntityFrameworkCore.Projectables#144
* Full qualification not needed anymore by @​PhenX in
EFNext/EntityFrameworkCore.Projectables#157
* Split generator tests in different classes by @​PhenX in
EFNext/EntityFrameworkCore.Projectables#162
* Refactor ExpressionSyntaxRewriter into focused partial class files by
@​Copilot in
EFNext/EntityFrameworkCore.Projectables#163
* Update readme and add new test for constructors by @​PhenX in
EFNext/EntityFrameworkCore.Projectables#165
* Remove obsolete code by @​PhenX in
EFNext/EntityFrameworkCore.Projectables#167
* Add source generator self-benchmark covering all expression
transformers by @​Copilot in
EFNext/EntityFrameworkCore.Projectables#168
* Fix null conditional rewrite generating invalid member access on
nullable value types by @​Copilot in
EFNext/EntityFrameworkCore.Projectables#169
* Improve generator benchmark with more realistic scenario by @​PhenX in
EFNext/EntityFrameworkCore.Projectables#170
* Fix stale incremental generator cache when referenced types change in
other source files by @​Copilot in
EFNext/EntityFrameworkCore.Projectables#172
* Add tests for properties with a getter and setter by @​PhenX in
EFNext/EntityFrameworkCore.Projectables#173
* UseMemberBody more strict with expressions by @​PhenX in
EFNext/EntityFrameworkCore.Projectables#175
* Add custom Copilot instructions by @​PhenX in
EFNext/EntityFrameworkCore.Projectables#177
* Reorganize generator project by @​PhenX in
EFNext/EntityFrameworkCore.Projectables#178
* Add closure resolution benchmark by @​PhenX in
EFNext/EntityFrameworkCore.Projectables#179
* Feature/optimize closures by @​PhenX in
EFNext/EntityFrameworkCore.Projectables#180
* Feature/optimize resolver by @​PhenX in
EFNext/EntityFrameworkCore.Projectables#182
* Update github project urls by @​PhenX in
EFNext/EntityFrameworkCore.Projectables#184
* Update deps by @​PhenX in
EFNext/EntityFrameworkCore.Projectables#185
* Remove obsolete verified files and name net8 files correctly by
@​PhenX in
EFNext/EntityFrameworkCore.Projectables#186
* Remove all allocations when resolving and make it even faster by
@​PhenX in
EFNext/EntityFrameworkCore.Projectables#189
* Add devcontainer configuration for C# (.NET) development by @​koenbeuk
in EFNext/EntityFrameworkCore.Projectables#190

**Full Changelog**:
EFNext/EntityFrameworkCore.Projectables@v5.0.2...v6.0.0

Commits viewable in [compare
view](EFNext/EntityFrameworkCore.Projectables@v5.0.2...v6.0.0).
</details>

[![Dependabot compatibility
score](https://dependabot-badges.githubapp.com/badges/compatibility_score?dependency-name=EntityFrameworkCore.Projectables&package-manager=nuget&previous-version=5.0.2&new-version=6.0.0)](https://docs.github.com/en/github/managing-security-vulnerabilities/about-dependabot-security-updates#about-compatibility-scores)

Dependabot will resolve any conflicts with this PR as long as you don't
alter it yourself. You can also trigger a rebase manually by commenting
`@dependabot rebase`.

[//]: # (dependabot-automerge-start)
[//]: # (dependabot-automerge-end)

---

<details>
<summary>Dependabot commands and options</summary>
<br />

You can trigger Dependabot actions by commenting on this PR:
- `@dependabot rebase` will rebase this PR
- `@dependabot recreate` will recreate this PR, overwriting any edits
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</details>

---------

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: James Gunn <james@gunn.io>
gunndabad added a commit to DFE-Digital/teaching-record-system that referenced this pull request Mar 27, 2026
Updated
[EntityFrameworkCore.Projectables](https://github.com/EFNext/EntityFrameworkCore.Projectables)
from 5.0.2 to 6.0.0.

<details>
<summary>Release notes</summary>

_Sourced from [EntityFrameworkCore.Projectables's
releases](https://github.com/EFNext/EntityFrameworkCore.Projectables/releases)._

## 6.0.0

## What's Changed

### Major changes

* Add support for projectable method overloads by @​PhenX in
EFNext/EntityFrameworkCore.Projectables#143
* Add C#​14 extension members by @​PhenX in
EFNext/EntityFrameworkCore.Projectables#148
* Support explicitly implemented interface members and default interface
properties by @​rhodon-jargon in
EFNext/EntityFrameworkCore.Projectables#135
* Support block-bodied members with [Projectable] attribute by @​Copilot
in EFNext/EntityFrameworkCore.Projectables#152
* Add ExpandEnumMethods to expand enum extension calls into ternary
expressions by @​Copilot in
EFNext/EntityFrameworkCore.Projectables#150
* Add support for pattern matching in various cases by @​PhenX in
EFNext/EntityFrameworkCore.Projectables#158
* Add support for projectable constructors by @​PhenX in
EFNext/EntityFrameworkCore.Projectables#161
* AOT-compatible static projection registry + SyntaxFactory-based
emission by @​Copilot in
EFNext/EntityFrameworkCore.Projectables#166
* Improve UseMemberBody and add new diagnostics by @​PhenX in
EFNext/EntityFrameworkCore.Projectables#174
* Add code fixes for EFP0001, EFP0002 and EFP0008, with tests by @​PhenX
in EFNext/EntityFrameworkCore.Projectables#181
* Add a code fixer and a code refactorer to transform factory methods
into constructors by @​PhenX in
EFNext/EntityFrameworkCore.Projectables#183
* Improve source generator and analyzer responsiveness by @​PhenX in
EFNext/EntityFrameworkCore.Projectables#171
* Docs website by @​PhenX in
EFNext/EntityFrameworkCore.Projectables#194
* Implement global MSBuild defaults for [Projectable] options by
@​koenbeuk in
EFNext/EntityFrameworkCore.Projectables#191

### Other changes

* Check source generator output compilation by @​PhenX in
EFNext/EntityFrameworkCore.Projectables#156
* Fix GetImplementingProperty issue when using interfaces by @​PhenX in
EFNext/EntityFrameworkCore.Projectables#144
* Full qualification not needed anymore by @​PhenX in
EFNext/EntityFrameworkCore.Projectables#157
* Split generator tests in different classes by @​PhenX in
EFNext/EntityFrameworkCore.Projectables#162
* Refactor ExpressionSyntaxRewriter into focused partial class files by
@​Copilot in
EFNext/EntityFrameworkCore.Projectables#163
* Update readme and add new test for constructors by @​PhenX in
EFNext/EntityFrameworkCore.Projectables#165
* Remove obsolete code by @​PhenX in
EFNext/EntityFrameworkCore.Projectables#167
* Add source generator self-benchmark covering all expression
transformers by @​Copilot in
EFNext/EntityFrameworkCore.Projectables#168
* Fix null conditional rewrite generating invalid member access on
nullable value types by @​Copilot in
EFNext/EntityFrameworkCore.Projectables#169
* Improve generator benchmark with more realistic scenario by @​PhenX in
EFNext/EntityFrameworkCore.Projectables#170
* Fix stale incremental generator cache when referenced types change in
other source files by @​Copilot in
EFNext/EntityFrameworkCore.Projectables#172
* Add tests for properties with a getter and setter by @​PhenX in
EFNext/EntityFrameworkCore.Projectables#173
* UseMemberBody more strict with expressions by @​PhenX in
EFNext/EntityFrameworkCore.Projectables#175
* Add custom Copilot instructions by @​PhenX in
EFNext/EntityFrameworkCore.Projectables#177
* Reorganize generator project by @​PhenX in
EFNext/EntityFrameworkCore.Projectables#178
* Add closure resolution benchmark by @​PhenX in
EFNext/EntityFrameworkCore.Projectables#179
* Feature/optimize closures by @​PhenX in
EFNext/EntityFrameworkCore.Projectables#180
* Feature/optimize resolver by @​PhenX in
EFNext/EntityFrameworkCore.Projectables#182
* Update github project urls by @​PhenX in
EFNext/EntityFrameworkCore.Projectables#184
* Update deps by @​PhenX in
EFNext/EntityFrameworkCore.Projectables#185
* Remove obsolete verified files and name net8 files correctly by
@​PhenX in
EFNext/EntityFrameworkCore.Projectables#186
* Remove all allocations when resolving and make it even faster by
@​PhenX in
EFNext/EntityFrameworkCore.Projectables#189
* Add devcontainer configuration for C# (.NET) development by @​koenbeuk
in EFNext/EntityFrameworkCore.Projectables#190

**Full Changelog**:
EFNext/EntityFrameworkCore.Projectables@v5.0.2...v6.0.0

Commits viewable in [compare
view](EFNext/EntityFrameworkCore.Projectables@v5.0.2...v6.0.0).
</details>

[![Dependabot compatibility
score](https://dependabot-badges.githubapp.com/badges/compatibility_score?dependency-name=EntityFrameworkCore.Projectables&package-manager=nuget&previous-version=5.0.2&new-version=6.0.0)](https://docs.github.com/en/github/managing-security-vulnerabilities/about-dependabot-security-updates#about-compatibility-scores)

Dependabot will resolve any conflicts with this PR as long as you don't
alter it yourself. You can also trigger a rebase manually by commenting
`@dependabot rebase`.

[//]: # (dependabot-automerge-start)
[//]: # (dependabot-automerge-end)

---

<details>
<summary>Dependabot commands and options</summary>
<br />

You can trigger Dependabot actions by commenting on this PR:
- `@dependabot rebase` will rebase this PR
- `@dependabot recreate` will recreate this PR, overwriting any edits
that have been made to it
- `@dependabot show <dependency name> ignore conditions` will show all
of the ignore conditions of the specified dependency
- `@dependabot ignore this major version` will close this PR and stop
Dependabot creating any more for this major version (unless you reopen
the PR or upgrade to it yourself)
- `@dependabot ignore this minor version` will close this PR and stop
Dependabot creating any more for this minor version (unless you reopen
the PR or upgrade to it yourself)
- `@dependabot ignore this dependency` will close this PR and stop
Dependabot creating any more for this dependency (unless you reopen the
PR or upgrade to it yourself)


</details>

---------

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: James Gunn <james@gunn.io>
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Support C# 14 extension members

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