def handleEval(self, statement):
""" Evaluates the statement in the current context.
Raises MatchFailedException if the expression evaluates to False.
"""
if not EvaluateLine(statement, self.variables):
raise MatchFailedException(statement, self.cursor, self.variables)
def __if(self, statement, variables):
if not self.__isEmpty() and abs(self.__peek()) in [ IfStack.BranchNotTaken,
IfStack.BranchNotTakenYet ]:
self.__push(IfStack.BranchNotTaken)
elif EvaluateLine(statement, variables):
self.__push(IfStack.BranchTaken)
else:
self.__push(IfStack.BranchNotTakenYet)
def __elif(self, statement, variables):
if self.__isEmpty():
raise BadStructureException("CHECK-ELIF must be after CHECK-IF or CHECK-ELIF",
statement.lineNo)
if self.__peek() < 0:
raise BadStructureException("CHECK-ELIF cannot be after CHECK-ELSE", statement.lineNo)
if self.__peek() == IfStack.BranchTaken:
self.__setLast(IfStack.BranchNotTaken)
elif self.__peek() == IfStack.BranchNotTakenYet:
if EvaluateLine(statement, variables):
self.__setLast(IfStack.BranchTaken)
# else, the CHECK-ELIF condition is False, so do nothing: the last element on the stack is
# already set to BranchNotTakenYet.
else:
assert self.__peek() == IfStack.BranchNotTaken
def testEvalGroup(statements, scope, variables):
for statement in statements:
if not EvaluateLine(statement, variables):
raise MatchFailedException(statement, scope.start, variables)
def testEvalGroup(assertions, scope, variables):
for assertion in assertions:
if not EvaluateLine(assertion, variables):
raise MatchFailedException(assertion, scope.start)