"""Re-written version of simpleexample for 2.0

Shows use of Parser to check syntax of declaration and
test that a particular production is matching what we
expect it to match...
"""
from simpleparse.common import numbers, strings, comments

declaration = r'''# note use of raw string when embedding in python code...
file           :=  [ \t\n]*, section+
section        :=  '[',identifier,']', ts,'\n', body
body           :=  statement*
statement      :=  (ts,semicolon_comment)/equality/nullline
nullline       :=  ts,'\n'
equality       :=  ts, identifier,ts,'=',ts,identified,ts,'\n'
identifier     :=  [a-zA-Z], [a-zA-Z0-9_]*
identified     :=  string/number/identifier
ts             :=  [ \t]*
'''

from simpleparse.parser import Parser
parser = Parser( declaration )

testEquality = [
	"s=3\n",
	"s = 3\n",
	'''  s="three\\nthere"\n''',
	'''  s=three\n''',
]

production = "equality"

if __name__ =="__main__":
	for testData in testEquality:
		success, children, nextcharacter = parser.parse( testData, production=production)
		assert success and nextcharacter==len(testData), """Wasn't able to parse %s as a %s (%s chars parsed of %s), returned value was %s"""%( repr(testData), production, nextcharacter, len(testData), (success, children, nextcharacter))