Help with Error location in Bison 2.1

[cwhite]

Hi! Can someone explain to me how I could get the column number for an error?
As I understand it the '@n' feature needs for yylex to store information in
yylloc. How would I do this with Flex? And if it's stored in Flex then only
the tokens will have column numbers. Will Bison automatically recompute
column numbers for nonterminals?

I hope someone can provide or link to a sample code. Thank you.
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