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Update LangVersion to C# 9.

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mono was the bottleneck restricting our ability to use a newer C# version. mono 6.12 is currently available. Although poorly documented on their website, this supports C# 9. https://www.mono-project.com/docs/about-mono/versioning/#mono-source-versioning indicates mono 6.12 uses Roslyn 3.9.0. https://github.com/dotnet/roslyn/blob/main/docs/wiki/NuGet-packages.md#versioning indicates Roslyn 3.9.0 supports C# 9.

This unlocks C# 8 and C# 9 features previously unavailable to us.
- https://learn.microsoft.com/en-us/dotnet/csharp/whats-new/csharp-version-history#c-version-80
- https://learn.microsoft.com/en-us/dotnet/csharp/whats-new/csharp-version-history#c-version-9

A newer version of StyleCop is required to avoid rules tripping up on the new syntax. Currently only prerelease versions are available but their use is encouraged https://github.com/DotNetAnalyzers/StyleCopAnalyzers/issues/3420#issuecomment-994899135

Fix style rule violations on existing rules where the newer language version makes some existing casts redundant or allows use of the null coalescing assignment operator.
This commit is contained in:
RoosterDragon
2023-03-26 16:59:58 +01:00
committed by Pavel Penev
parent 9dd4f938da
commit 83561d639d
18 changed files with 42 additions and 38 deletions
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6
Makefile
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@@ -3,7 +3,7 @@
# to compile, run:
# make
#
# to compile using Mono (version 6.4 or greater) instead of .NET 6, run:
# to compile using Mono (version 6.12 or greater) instead of .NET 6, run:
# make RUNTIME=mono
#
# to compile using system libraries for native dependencies, run:
@@ -92,7 +92,7 @@ endif
all:
@echo "Compiling in ${CONFIGURATION} mode..."
ifeq ($(RUNTIME), mono)
@command -v $(firstword $(MSBUILD)) >/dev/null || (echo "OpenRA requires the '$(MSBUILD)' tool provided by Mono >= 6.4."; exit 1)
@command -v $(firstword $(MSBUILD)) >/dev/null || (echo "OpenRA requires the '$(MSBUILD)' tool provided by Mono >= 6.12."; exit 1)
@$(MSBUILD) -t:Build -restore -p:Configuration=${CONFIGURATION} -p:TargetPlatform=$(TARGETPLATFORM)
else
@$(DOTNET) build -c ${CONFIGURATION} -nologo -p:TargetPlatform=$(TARGETPLATFORM)
@@ -173,7 +173,7 @@ help:
@echo 'to compile, run:'
@echo ' make'
@echo
@echo 'to compile using Mono (version 6.4 or greater) instead of .NET 6, run:'
@echo 'to compile using Mono (version 6.12 or greater) instead of .NET 6, run:'
@echo ' make RUNTIME=mono'
@echo
@echo 'to compile using system libraries for native dependencies, run:'