[6.1][Parser] Include all AST nodes from every #if region in ParserUnit #79123
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bnbarham
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'ParserUnit' is used for analyzing syntax structures _mainly_ in SourceKit. Since we removed IfConfigDecl from AST, ParserUnit didn't inclue any AST in #if ... #endif regions even for active region because it used to consider all inactive. Instead, consider every region "active" and include all the AST nodes. rdar://117387631 (cherry picked from commit 694e815)
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Cherry-pick #79120 into
release/6.1ParserUnitis used for analyzing syntax structures mainly in SourceKit. Since we removedIfConfigDeclfrom AST,ParserUnitdidn't include any AST in#if ... #endifregions even for active region because it used to consider all inactive. Instead, consider every region "active" and include all the AST nodes.ParserUnitwhich is used in SourceKit (for syntactic analysis),-define-availabilityargument parsing (never accept#if), and inlldbfor checking if the statement is incomplete or not.IfConfigDeclremoval.