-----------------------------
- Fixed bug 345, in which delimitedList changed expressions in place
using `expr.streamline()`. Reported by Kim Gräsman, thanks!
- Fixed bug 346, when a string of word characters was passed to WordStart
or `WordEnd` instead of just taking the default value. Originally posted
as a question by Parag on StackOverflow, good catch!
- Fixed bug 350, in which `White` expressions could fail to match due to
unintended whitespace-skipping. Reported by Fu Hanxi, thank you!
- Fixed bug 355, when a `QuotedString` is defined with characters in its
quoteChar string containing regex-significant characters such as ., *,
?, [, ], etc.
- Fixed bug in `ParserElement.run_tests` where comments would be displayed
using `with_line_numbers`.
- Added optional "min" and "max" arguments to `delimited_list`. PR
submitted by Marius, thanks!
- Added new API change note in `whats_new_in_pyparsing_3_0_0`, regarding
a bug fix in the `bool()` behavior of `ParseResults`.
Prior to pyparsing 3.0.x, the `ParseResults` class implementation of
`__bool__` would return `False` if the `ParseResults` item list was empty,
even if it contained named results. In 3.0.0 and later, `ParseResults` will
return `True` if either the item list is not empty *or* if the named
results dict is not empty.
generate an empty ParseResults by parsing a blank string with
a ZeroOrMore
result = Word(alphas)[...].parse_string("")
print(result.as_list())
print(result.as_dict())
print(bool(result))
add a results name to the result
result["name"] = "empty result"
print(result.as_list())
print(result.as_dict())
print(bool(result))
Prints:
[]
{}
False
[]
{'name': 'empty result'}
True
In previous versions, the second call to `bool()` would return `False`.
- Minor enhancement to Word generation of internal regular expression, to
emit consecutive characters in range, such as "ab", as "ab", not "a-b".
- Fixed character ranges for search terms using non-Western characters
in booleansearchparser, PR submitted by tc-yu, nice work!
- Additional type annotations on public methods.