Optional support for round-trip testing the new Swift parser. #60888
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When enabled, compile in support for round-trip testing the new
SwiftSyntax-provided Swift parser alongside the existing parser. Right
now, this means parsing every source file with the new parser and
ensuring that the resulting syntax tree can reproduce the input source
precisely. Over time, this is expected to grow.
Opt in to this behavior by passing the following to build-script:
build-script --early-swiftsyntax --extra-cmake-options=-DSWIFT_SWIFT_PARSER_MODE:STRING=ROUNDTRIP
Replace the correct Swift -> EarlySwiftSyntax dependency with an EarlySwiftDriver -> EarlySwiftSyntax dependency, to keep a linear dependency order in this part of the build graph.
DougGregor
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When enabled, compile in support for round-trip testing the new
SwiftSyntax-provided Swift parser alongside the existing parser. Right
now, this means parsing every source file with the new parser and
ensuring that the resulting syntax tree can reproduce the input source
precisely. Over time, this is expected to grow.
Opt in to this behavior by passing the following to build-script: