examples.exp.limits Namespace Reference

Variables
string	title
string	pattern
string	input = '---+1234.56789E-10==='
string	header = 'RESULT'
int	testno = 0
	exp = ApgExp(pattern)
	result = exp.exec(input)
	end

Variable Documentation

end

examples.exp.limits.end

Definition at line 58 of file limits.py.

exp

examples.exp.limits.exp = ApgExp(pattern)

Definition at line 41 of file limits.py.

header

string examples.exp.limits.header = 'RESULT'

Definition at line 37 of file limits.py.

input

string examples.exp.limits.input = '---+1234.56789E-10==='

Definition at line 36 of file limits.py.

pattern

string examples.exp.limits.pattern

Initial value:

=  '''float    = sign decimal exponent
sign     = ["+" / "-"]
decimal  = integer [dot fraction]
           / dot fraction
integer  = 1*%d48-57
dot      = "."
fraction = *%d48-57
exponent = ["e" esign exp]
esign    = ["+" / "-"]
exp      = 1*%d48-57
'''

Definition at line 22 of file limits.py.

result

examples.exp.limits.result = exp.exec(input)

Definition at line 42 of file limits.py.

testno

int examples.exp.limits.testno = 0

Definition at line 38 of file limits.py.

title

string examples.exp.limits.title

Initial value:

=  '''This example will demonstrate how to place limits
on the number of node hits and parse tree depth.
Exists to avoid the problem of "catestrophic backtracking".
Although this is not nearly as big a problem for ApgExp
as it is for regex, nonetheless, facilities exist for
limiting a runaway parser.
'''

Definition at line 12 of file limits.py.