[6.0][Macros] Fix column calculation in MacroExpansionContext for plugins #2657
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Cherry-pick #2656 into release/6.0
rdar://128293478 (Source location column can be shifted by 1)
MacroExpansionContext.location(of:at:filePathMode:)
were often resulted wrong locations. Sincecolumn
ofPluginMessage.Syntax
is 1-based, we need to-1
when using it as an offset.Examples
, and tested it locally.