def p_ifstatement(p):
"""
if_statement : IF expression LBRACK statement_list RBRACK
"""
p[0] = ast.If(p[2], p[4])
def p_ifstatement_else_if(p):
"""
if_statement : IF expression LBRACK statement_list RBRACK ELSE if_statement
"""
p[0] = ast.If(p[2], p[4], p[7])
def p_ifstatement_else(p):
'''
if_statement : IF expression LBRACK statement_list RBRACK ELSE LBRACK statement_list RBRACK
'''
p[0] = ast.If(p[2], p[4], p[8])