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Begin a bunch of comments on the parser tools. You can look through the

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file, but it is more helpful to have them summarized here.


git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@36121 a592a061-630c-0410-9148-cb99ea01b6c8
This commit is contained in:
Richard Heck 2010-11-05 16:18:20 +00:00
parent 665c9d78d5
commit fbd0436847
1 changed files with 49 additions and 1 deletions
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50
lib/lyx2lyx/parser_tools.py
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@ -17,7 +17,55 @@
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
" This modules offer several free functions to help parse lines. "
'''
This modules offer several free functions to help parse lines.
More documentaton is below, but here is a quick guide to what
they do. Optional arguments are marked by brackets.
find_token(lines, token, start[, end[, exact]]):
Returns the first line i, start <= i < end, on which
token is found at the beginning. Returns -1 if not
found. If exact is (given and) True, then differences
in whitespace do not count.
find_token_exact(lines, token, start[, end]):
Badly named. As find_token, but with ignorews True.
find_tokens(lines, tokens, start[, end[, ignorews]]):
Returns the first line i, start <= i < end, on which
oen of the tokens in tokens is found at the beginning.
Returns -1 if not found. If ignorews is (given and) True,
then differences in whitespace do not count.
find_tokens_exact(lines, token, start[, end]):
Badly named. As find_tokens, but with ignorews True.
find_token_backwards(lines, token, start):
find_tokens_backwards(lines, tokens, start):
As before, but look backwards.
find_re(lines, rexp, start[, end]):
As find_token, but rexp is a regular expression object,
so it has to be passed as e.g.: re.compile(r'...').
get_value(lines, token, start[, end[, default]):
Similar to find_token, but it returns what follows the
token on the found line. Example:
get_value(document.header, "\use_xetex", 0)
will find a line like:
\use_xetex true
and, in that case, return "true". (Note that whitespace
is stripped.) The final argument, default, defaults to "",
and is what is returned if we do not find anything. So you
can use that to set a default.
get_quoted_value(lines, token, start[, end[, default]):
Similar to get_value, but it will strip quotes off the
value, if they are present. So use this one for cases
where the value is normally quoted.
'''
# Utilities for one line
def check_token(line, token):