/
node.py
239 lines (201 loc) · 7.69 KB
/
node.py
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from value import Value
from symbol_table import SymbolTable as SymbolTableClass
class Node():
def __init__(self, value, children):
self.value = value
self.children = children
def Evaluate(self, SymbolTable):
pass
class BinOp(Node):
def same_type(self, value1, value2):
if (value1.type == value2.type):
return True
else:
return False
def Evaluate(self, SymbolTable):
value1_obj = self.children[0].Evaluate(SymbolTable)
value2_obj = self.children[1].Evaluate(SymbolTable)
value1 = value1_obj.getValue()
value2 = value2_obj.getValue()
if (self.value == "+"):
if not self.same_type(value1_obj, value2_obj):
raise ValueError("Operands must be the same type")
value_sum = value1 + value2
result = Value("int")
result.setValue(value_sum)
return result
elif (self.value == "-"):
if not self.same_type(value1_obj, value2_obj):
raise ValueError("Operands must be the same type")
value_sub = value1 - value2
result = Value("int")
result.setValue(value_sub)
return result
elif (self.value == "or"):
if not self.same_type(value1_obj, value2_obj):
raise ValueError("Operands must be the same type")
value_or = value1 or value2
result = Value("boolean")
result.setValue(value_or)
return result
elif (self.value == "*"):
if not self.same_type(value1_obj, value2_obj):
raise ValueError("Operands must be the same type")
value_mult = value1 * value2
result = Value("int")
result.setValue(value_mult)
return result
elif (self.value == "/"):
if not self.same_type(value1_obj, value2_obj):
raise ValueError("Operands must be the same type")
value_div = value1 // value2
result = Value("int")
result.setValue(value_div)
return result
elif (self.value == "and"):
if not self.same_type(value1_obj, value2_obj):
raise ValueError("Operands must be the same type")
value_and = value1 and value2
result = Value("boolean")
result.setValue(value_and)
return result
elif (self.value == ":="):
SymbolTable.setSymbol(value1, value2)
elif (self.value == ">"):
if not self.same_type(value1_obj, value2_obj):
raise ValueError("Operands must be the same type")
value_bigger = value1 > value2
result = Value("boolean")
result.setValue(value_bigger)
return result
elif (self.value == "<"):
if not self.same_type(value1_obj, value2_obj):
raise ValueError("Operands must be the same type")
value_smaller = value1 < value2
result = Value("boolean")
result.setValue(value_smaller)
return result
elif (self.value == "="):
if not self.same_type(value1_obj, value2_obj):
raise ValueError("Operands must be the same type")
value_equal = value1 == value2
result = Value("boolean")
result.setValue(value_equal)
return result
elif (self.value == "!="):
if not self.same_type(value1_obj, value2_obj):
raise ValueError("Operands must be the same type")
value_diff = value1 != value2
result = Value("boolean")
result.setValue(value_diff)
return result
elif (self.value == ":"):
SymbolTable.createSymbol(value1, value2)
else:
return
class UnOp(Node):
def Evaluate(self, SymbolTable):
value_obj = self.children[0].Evaluate(SymbolTable)
value = value_obj.getValue()
if (self.value == "-"):
result = Value("int")
result.setValue(value * -1)
return result
elif (self.value == "not"):
if value_obj.type == "boolean":
result = Value("boolean")
result.setValue(not value)
return result
else:
raise ValueError("Operand must be a boolean")
else:
return
class StrVal(Node):
def Evaluate(self, SymbolTable):
value = Value("string")
value.setValue(self.value)
return value
class IntVal(Node):
def Evaluate(self, SymbolTable):
value = Value("int")
value.setValue(self.value)
return value
class BoolVal(Node):
def Evaluate(self, SymbolTable):
value = Value("boolean")
value.setValue(self.value)
return value
class Identifier(Node):
def Evaluate(self, SymbolTable):
value = SymbolTable.getSymbol(self.value)
return value
class NoOp(Node):
def Evaluate(self, SymbolTable):
return None
class Statements(Node):
def Evaluate(self, SymbolTable):
for child in self.children:
child.Evaluate(SymbolTable)
class Print(Node):
def Evaluate(self, SymbolTable):
value = self.children[0].Evaluate(SymbolTable)
print(value.getValue())
class Read(Node):
def Evaluate(self, SymbolTable):
result = input()
value = Value("int")
value.setValue(int(result))
return value
class If(Node):
def Evaluate(self, SymbolTable):
comp = self.children[0].Evaluate(SymbolTable)
if (comp.value):
self.children[1].Evaluate(SymbolTable)
else:
self.children[2].Evaluate(SymbolTable)
class While(Node):
def Evaluate(self, SymbolTable):
comp = self.children[0]
while (comp.Evaluate(SymbolTable).getValue()):
self.children[1].Evaluate(SymbolTable)
class Program(Node):
def Evaluate(self, SymbolTable):
SymbolTable.createSymbol(self.value, None)
for child in self.children:
child.Evaluate(SymbolTable)
class VarDec(Node):
def Evaluate(self, SymbolTable):
for child in self.children:
child.Evaluate(SymbolTable)
class FuncDec(Node):
def Evaluate(self, SymbolTable):
SymbolTable.createSymbol(self.value, "func")
SymbolTable.setSymbol(self.value, self)
class Funcs(Node):
def Evaluate(self, SymbolTable):
for func in self.children:
func.Evaluate(SymbolTable)
class FuncCall(Node):
def Evaluate(self, SymbolTable):
func_name = self.value
func_node = SymbolTable.getSymbol(func_name, "func").getValue()
funcSymbolTable = SymbolTableClass(SymbolTable)
var_dec = func_node.children[0]
args = [x.children[0] for x in var_dec.children]
func_node.children[0].Evaluate(funcSymbolTable)
if (len(args) != len(self.children)):
raise ValueError("Number of arguments must \
be the same as declaration")
for i in range(len(args)):
symbol = args[i].Evaluate(funcSymbolTable).getValue()
symbol_type = funcSymbolTable.getSymbol(symbol).getType()
value_obj = self.children[i].Evaluate(SymbolTable)
if (symbol_type != value_obj.getType()):
raise ValueError("Function argument must be \
the same as declared")
value = value_obj.getValue()
funcSymbolTable.setSymbol(symbol, value)
for i in range(1, len(func_node.children)):
func_node.children[i].Evaluate(funcSymbolTable)
result = funcSymbolTable.getSymbol(func_name)
return result