def tokensToValue(self, tokens, scope):
if not tokens or len(tokens) == 0:
return None
expression = SCSSExpression(tokens)
expression.evaluate(scope)
if not expression.tokens or len(expression.tokens) == 0:
raise SCSSCompileError("Expression, expression, why did you eat my tokens?", tokens[0])
elif len(expression.tokens) == 1:
return scssvariables.SCSSVariable.fromToken(expression.tokens[0])
else:
return scssvariables.SCSSList.fromTokens(expression.tokens)
def evaluate(self, callerScope, arguments = None):
try:
scope = self.scope.clone()
if arguments:
self.mapArguments(arguments, callerScope, scope)
for token in self.body:
if token.isAssignment():
SCSSExpression.processAssignment(token, scope)
elif token.isAtRule() and token.getKeyWord() == "return":
expression = SCSSExpression(token.getSignature())
expression.evaluate(scope)
if len(expression.tokens) == 0:
raise SCSSRunTimeError("Could not evaluate return statement of function %s" % self.name)
elif len(expression.tokens) == 1:
return scssvariables.SCSSVariable.fromToken(expression.tokens[0])
else:
return scssvariables.SCSSList.fromTokens(expression.tokens)
else:
raise SCSSRunTimeError("Unexpected token in function %s" % self.name, token)
raise SCSSRunTimeError("Function %s does not return a value" % self.name)
except Exception, exception:
raise SCSSRunTimeError(str(exception) + "\n In call to function " + self.name)
