Logging source generator: support generic methods (lift SYSLIB1011)#124638

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Copilot wants to merge 16 commits intomainfrom

copilot/support-generic-logging-methods

Commits on Feb 20, 2026

Initial plan
Copilot
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Support generic methods in logging source generator (lift SYSLIB1011 restriction)

Copilot
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svick
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Move generic check into bool result expression; fix tests and baseline

Copilot
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svick
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Refactor Gen methods to write directly to builder; forbid allows ref struct; handle nullable constraints

Copilot
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svick
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Handle IErrorTypeSymbol in constraints; rename LoggingMethodIsGeneric; fix XLF states

Copilot
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svick
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Use actual newline in GenTypeConstraints instead of \n escape

Copilot
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svick
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Use consistent formatting options
svick
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Merge branch 'copilot/support-generic-logging-methods' of https://github.com/dotnet/runtime into copilot/support-generic-logging-methods
svick
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Use compiled delegate for AllowsRefLikeType check; add unmanaged constraint test

Copilot
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svick
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Fix WithMiscellaneousOptions to OR with existing options instead of replacing

Copilot
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tarekgh
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Use IndexOf for char-based message check; add allows ref struct test; fix baseline

Copilot
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tarekgh
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Update list-of-diagnostics.md: SYSLIB1011 now describes allows ref struct restriction

Copilot
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tarekgh
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