99c30211b1
This change updates go/scanner to recognize the extended line directives that are now also handled by cmd/compile: //line filename:line //line filename:line:column /*line filename:line*/ /*line filename:line:column*/ As before, //-style line directives must start in column 1. /*-style line directives may be placed anywhere in the code. In both cases, the specified position applies to the character immediately following the comment; for line comments that is the first character on the next line (after the newline of the comment). The go/token API is extended by a new method File.AddLineColumnInfo(offset int, filename string, line, column int) which extends the existing File.AddLineInfo(offset int, filename string, line int) by adding a column parameter. Adjusted token.Position computation is changed to take into account column information if provided via a line directive: A (line-directive) relative position will have a non-zero column iff the line directive specified a column; if the position is on the same line as the line directive, the column is relative to the specified column (otherwise it is relative to the line beginning). See also #24183. Finally, Position.String() has been adjusted to not print a column value if the column is unknown (== 0). Fixes #24143. Change-Id: I5518c825ad94443365c049a95677407b46ba55a1 Reviewed-on: https://go-review.googlesource.com/97795 Reviewed-by: Matthew Dempsky <mdempsky@google.com> |
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