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Fix column computation in documentation #44

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Fix column computation in documentation #44

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fd0c4b4
Fix find_column() documentation comment.
alberth Feb 3, 2020
1bdec83
Fix off-by-one column computation for all but first line.
alberth Feb 3, 2020
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6 changes: 2 additions & 4 deletions docs/sly.rst
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Original file line number Diff line number Diff line change
Expand Up @@ -301,13 +301,11 @@ column information as a separate step. For instance, you can search
backwards until you reach the previous newline::

# Compute column.
# input is the input text string
# text is the input text string
# token is a token instance
def find_column(text, token):
last_cr = text.rfind('\n', 0, token.index)
if last_cr < 0:
last_cr = 0
column = (token.index - last_cr) + 1
column = token.index - last_cr
return column

Since column information is often only useful in the context of error
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