Use Span<T> on all platforms that support it #6130
Merged
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Context
FEATURE_SPAN
is defined only when building the .NET Core flavor of MSBuild but the feature has been supported everywhere but downlevel .NET Framework for some time.Changes Made
Removed
FEATURE_SPAN
together with all code conditionally compiled when the flag was not defined. Wrapped the code in#if !CLR2COMPATIBILITY
instead as it's not used when building MSBuildTaskHost.Testing
Existing unit tests. There might be some very minor perf win on non-Windows OSes where we were previously using strings (i.e. Mono).
Notes
This is code cleanup.