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literal_node.py
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literal_node.py
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"""
CSCI-603 Parser Lab
Author: Sean Strout @ RIT CS
Author: Shweta Yakkali
Author: Aishwarya Desai
A literal expression is of the prefix form, where {value} is an integer:
'{value}'
For example:
'10'
'4'
When emitted, the expressions are displayed infix as strings:
'10'
'4'
When evaluated, their integer form is returns:
10
4
"""
class LiteralNode:
"""
A LiteralNode consists of:
:slot: val: the value (int)
"""
__slots__ = 'val',
def __init__(self, val):
"""
Initialize a LiteralNode.
:param val: the value (int)
:return: None
"""
self.val=val
pass
def emit(self):
"""
Return a string representation of the value, e.g.:
'{value}'
:return: the string form of the value (str
"""
return str(self.val)
def evaluate(self):
"""
Returns the value of the literal.
:return: The value (int)
"""
return int(self.val)