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compiler_main.py
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compiler_main.py
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import re
import sys
"""
Global Variables
"""
symbolTable = dict()
externalVariables = dict()
localVariables = list()
keyword = ["include", "define", "while", "do", "for", "return", "extern"]
dataType = ["void", "int", "short", "long", "char", "float", "double"]
preDefRoutine = ["printf", "scanf"]
identifier = "^[^\d\W]\w*\Z"
punctuator = "^[()[\]{};.,]$"
aritmeticOperator = "^[-+*/]$"
assignmentOperator = "^=$"
relationalOperator = ["<", ">", "<=", ">=", "==", "!="]
logicalOperator = ["&&", "||", "!"]
number = "^\d+$"
spaces = "[' ''\n''\t']"
intermediate_code = str()
syntax_tree = str()
top = 0
i_ = 1
tmp = str()
li = [0] * 50
lb = 0
fp = 1
label = 1
syntax_tree_top = 0
syntax_tree_i_ = 1
syntax_tree_tmp = str()
syntax_tree_do = 0
syntax_tree_li = [0] * 50
syntax_tree_label = 1
syntax_tree_wh = ["dd"]
op = str()
def loadSymbolTable():
symbolTable["keyword"] = keyword
symbolTable["dataType"] = dataType
symbolTable["preDefRoutine"] = preDefRoutine
"""
Functions to generate 3-address intermediate code
"""
def push(val):
global top,li
top = top+1
li[top]=val
def codegen():
global tmp,i_,top,li, intermediate_code
tmp = "t"
tmp+=str(i_)
#print(tmp +" = "+str(li[top-2]), str(li[top-1]), str(li[top]))
intermediate_code += tmp + " = " + str(li[top-2]) + " " + str(li[top-1]) + " " + str(li[top]) + "\n"
top-=2
li[top]=tmp
i_=i_+1
def codegen_umin():
global tmp,i_,top,li, intermediate_code
tmp = "t"
tmp+=str(i_)
#print(tmp+" = -"+str(li[top]))
intermediate_code += tmp + " = -" + str(li[top]) + "\n"
top=top-1
li[top]=tmp
i_=i_+1
def codegen_assign():
global tmp,i_,top,li, intermediate_code
#print(str(li[top-1])+" = "+str(li[top]))
intermediate_code += str(li[top-1]) + " = " + str(li[top]) + "\n"
top=top-2
def lab1():
global label, intermediate_code
#print("L"+str(label)+":")
intermediate_code += "L" + str(label) + ":" + "\n"
label = label+1
def lab2():
global tmp,i_,top,li,label, intermediate_code
tmp = "t"
tmp+=str(i_)
#print(tmp+" = "+li[top-2],li[top-1],li[top])
#print("if "+tmp+" goto L"+str(label-1))
intermediate_code += tmp +" = " + str(li[top-2]) + " " + str(li[top-1]) + " " + str(li[top]) + "\n"
intermediate_code += "if " + tmp + " goto L" + str(label-1) + "\n"
i_=i_+1
label = label-1
top = top-3
"""
Functions to generate a syntax tree
"""
def syntax_tree_push(val):
global syntax_tree_top, syntax_tree_li
syntax_tree_top = syntax_tree_top + 1
syntax_tree_li[syntax_tree_top]=val
def syntax_tree_gen():
global syntax_tree_tmp, syntax_tree_i_, syntax_tree_top, syntax_tree_li, syntax_tree
tmp = "N"
tmp+=str(syntax_tree_i_)
#print("NODE "+tmp +" -> "+str(syntax_tree_li[syntax_tree_top-2])+" <-- "+ str(syntax_tree_li[syntax_tree_top-1])+" --> "+ str(syntax_tree_li[syntax_tree_top]))
syntax_tree += "NODE " + tmp + " -> " + str(syntax_tree_li[syntax_tree_top-2]) + " <-- " + str(syntax_tree_li[syntax_tree_top-1]) + " --> " + str(syntax_tree_li[syntax_tree_top]) + "\n"
#if(do==1):
#print("do --> "+tmp)
syntax_tree_top -= 2
syntax_tree_li[syntax_tree_top] = tmp
syntax_tree_i_ = syntax_tree_i_ + 1
def syntax_tree_gen_umin():
global syntax_tree_tmp, syntax_tree_i_, syntax_tree_top, syntax_tree_li, syntax_tree
tmp = "t"
tmp+=str(syntax_tree_i_)
#print(tmp+" = -"+str(syntax_tree_li[syntax_tree_top]))
syntax_tree += tmp + " = -" + str(syntax_tree_li[syntax_tree_top]) + "\n"
syntax_tree_top=syntax_tree_top-1
syntax_tree_li[syntax_tree_top]=tmp
syntax_tree_i_=syntax_tree_i_+1
def syntax_tree_gen_assign():
global syntax_tree_tmp, syntax_tree_i_, syntax_tree_top, syntax_tree_li, syntax_tree
#print(str(syntax_tree_li[syntax_tree_top-1])+" <-- = --> "+str(syntax_tree_li[syntax_tree_top]))
syntax_tree += str(syntax_tree_li[syntax_tree_top-1]) + " <-- = --> " + str(syntax_tree_li[syntax_tree_top]) + "\n"
if(syntax_tree_do!=0):
syntax_tree += "do --> =" + "\n"
else:
syntax_tree += "main --> =" + "\n"
syntax_tree_top=syntax_tree_top-2
def syntax_tree_lab1():
global syntax_tree_label
#print("L"+str(label)+":")
syntax_tree_label = syntax_tree_label+1
def syntax_tree_lab2():
global syntax_tree_tmp, syntax_tree_i_, syntax_tree_top, syntax_tree_li, syntax_tree_label, syntax_tree_wh, syntax_tree
tmp = "N"
tmp+=str(syntax_tree_i_)
#print("NODE "+tmp +" -> "+str(syntax_tree_li[syntax_tree_top-2])+" <-- "+ str(syntax_tree_li[syntax_tree_top-1])+" --> "+ str(syntax_tree_li[syntax_tree_top]))
#print("if "+tmp+" goto L"+str(label-1));
syntax_tree += "NODE " + tmp + " -> " + str(syntax_tree_li[syntax_tree_top-2]) + " <-- " + str(syntax_tree_li[syntax_tree_top-1]) + " --> " + str(syntax_tree_li[syntax_tree_top]) + "\n"
syntax_tree_i_=syntax_tree_i_+1
syntax_tree_wh[0]=tmp
syntax_tree_label = syntax_tree_label-1
syntax_tree_top = syntax_tree_top-3
"""
Lexical Analyzer
"""
def validLexeme(string):
res = False
if(string in keyword):
#print("key " + string + "\n")
res = "keyword"
elif(string in dataType):
#print("dataType " + string + "\n")
res = "dataType"
elif(string in preDefRoutine):
res = "preDefRoutine"
elif(re.match(identifier, string)):
#print("id " + string + "\n")
res = "identifier"
elif(re.match(punctuator, string)):
#print("punc " + string)
res = "punctuator"
elif(re.match(number, string)):
res = "number"
elif(re.match(aritmeticOperator, string)):
res = "arithmeticOperator"
elif(re.match(assignmentOperator, string)):
res = "assignmentOperator"
elif(string in relationalOperator):
res = "relationalOperator"
elif(string in logicalOperator):
res = "logicalOperator"
elif(string == "#"):
res = "hashOperator"
elif(string == ".h"):
res = "headerExtension"
elif(string == "true" or string == "false"):
res = "boolean"
elif(string == "++"):
res = "incrementOperator"
elif(string == "--"):
res = "decrementOperator"
return res
def lexer():
global lb
global fp
lexeme = prg[lb:fp]
while(re.match(spaces, lexeme)):
#print("x " + lexeme + "\n")
lb = lb + 1
fp = fp + 1
lexeme = prg[lb:fp]
#if(re.match(spaces, prg[
#print("lexeme: " + lexeme + " type: " + str(type(lexeme)) + "\n");
res = validLexeme(lexeme)
while((not res) and (fp <= len(prg))):
#print("lexeme1: " + lexeme + "\n")
fp = fp + 1
lexeme = prg[lb:fp]
res = validLexeme(lexeme)
#print(lexeme + "\n")
tokenType = res
res = validLexeme(lexeme)
while((res) and (fp <= len(prg))):
#print("lexeme2: " + lexeme + "\n")
fp = fp + 1
lexeme = prg[lb:fp]
tokenType = res
res = validLexeme(lexeme)
lexeme = prg[lb:fp - 1]
lb = fp - 1
if((tokenType != False) and (tokenType not in symbolTable)):
symbolTable[tokenType] = list()
if((tokenType != False) and lexeme not in symbolTable[tokenType]):
symbolTable[tokenType].append(lexeme.strip())
#print("TOKEN: " + str(lexeme) + " TYPE: " + str(tokenType) + "\n");
#print(str(lb) + " " + str(fp) + "\n")
#print(str(len(prg)))
return dict({tokenType:lexeme})
"""
Parser functions for recursive descent parsing with backtracking
"""
def parse_start():
status = program()
if(status == 0):
print("\nIntermediate code:\n")
print(intermediate_code)
print("\nSyntax Tree:\n")
print(syntax_tree)
print("SUCCESSFUL PARSING\n")
else:
print("FAILED PARSING\n")
def program():
status = preProcessorDirective()
if(status == 0):
status = externDeclaration()
if(status == 0):
status = mainFunction()
return status
def preProcessorDirective():
status = 0
token = lexer()
token_type = list(token.keys())[0]
token_value = list(token.values())[0]
if(token_type == "hashOperator"):
token = lexer()
token_type = list(token.keys())[0]
token_value = list(token.values())[0]
if(token_type == "keyword" and token_value == "include"):
token = lexer()
token_type = list(token.keys())[0]
token_value = list(token.values())[0]
if(token_type == "relationalOperator" and token_value == "<"):
token = lexer()
token_type = list(token.keys())[0]
token_value = list(token.values())[0]
if(token_type == "identifier"):
token = lexer()
token_type = list(token.keys())[0]
token_value = list(token.values())[0]
if(token_type == "headerExtension"):
token = lexer()
token_type = list(token.keys())[0]
token_value = list(token.values())[0]
if(token_type == "relationalOperator" and token_value == ">"):
status = preProcessorDirective()
#print(str(status) + " after return\n")
else:
print("Syntax error: expected '>' but received " + str(token_value) + "\n")
status = 1
else:
print("Syntax error: expected 'Header Extension' but received " + str(token_value) + "\n")
status = 1
else:
print("Syntax error: expected 'Identifer' but received " + str(token_value) + "\n")
status = 1
else:
print("Syntax error: expected '<' but received " + str(token_value) + "\n")
status = 1
elif(token_type == "keyword" and token_value == "define"):
token = lexer()
token_type = list(token.keys())[0]
token_value = list(token.values())[0]
if(token_type == "identifier"):
variableName = token_value
token = lexer()
token_type = list(token.keys())[0]
token_value = list(token.values())[0]
if(token_type == "number"):
variableValue = int(token_value.strip())
symbolTable[variableName] = variableValue
status = preProcessorDirective()
else:
print("Syntax error: expected 'Number' but received " + str(token_value) + "\n")
status = 1
else:
print("Syntax error: expected 'Identifier' but received " + str(token_value) + "\n")
status = 1
else:
print("Syntax error: expected 'Keyword include/define' but received " + str(token_value) + "\n")
status = 1
else:
#RESET POINTERS SINCE A WRONG TOKEN WAS OBTAINED
global lb, fp
lb = lb - len(token_value)
fp = fp - len(token_value)
return status
#print("Token key: " + str((token_type) + " values: " + str(token_value) + "\n"))
def externDeclaration():
status = 0
token = lexer()
token_type = list(token.keys())[0]
token_value = list(token.values())[0]
if(token_type == "keyword" and token_value == "extern"):
status = declarationStatement()
if(status == 0):
token = lexer()
token_type = list(token.keys())[0]
token_value = list(token.values())[0].strip()
if(not (token_type == "punctuator" and token_value == ";")):
print("Syntax error: expected 'Punctuator Semicolon1' but received " + str(token_value) + "\n")
status = 1
else:
#RESET POINTERS SINCE A WRONG TOKEN WAS OBTAINED
global lb, fp
lb = lb - len(token_value)
fp = fp - len(token_value)
return status
def declarationStatement():
status = 0
token = lexer()
token_type = list(token.keys())[0]
token_value = list(token.values())[0]
if(token_type == 'dataType'):
dataType = token_value.strip()
status = variable(dataType)
else:
print("Syntax error: expected 'Data Type' but received " + str(token_value) + "\n")
status = 1
return status
def optionalDeclarationStatement():
status = 0
token = lexer()
token_type = list(token.keys())[0]
token_value = list(token.values())[0]
#print("before reset: " + str(token_value))
#print("IN OPTDECL", token_type, token_value)
if(token_type == 'dataType'):
dataType = token_value.strip()
status = variable(dataType)
else:
#RESET POINTERS SINCE A WRONG TOKEN WAS OBTAINED
#print("resetting")
global lb, fp
lb = lb - len(token_value)
fp = fp - len(token_value)
status = 2
#print("after reset: " + str(token_value))
return status
def variable(dataType):
status = 0
token = lexer()
token_type = list(token.keys())[0]
token_value = list(token.values())[0]
#print("variable", token_type, token_value)
if(token_type == 'identifier'):
#print("received identifier, " + str(token_value))
variableName = token_value.strip()
if(dataType not in externalVariables):
externalVariables[dataType] = list()
if(variableName not in externalVariables[dataType]):
externalVariables[dataType].append(variableName)
#print(externalVariables)
else:
print("Syntax error: The variable "+str(token_value)+" of type "+token_type+" has already been initiliazed.\n")
status = 1
if(status==0):
status = variableDash(dataType)
else:
print("Syntax error: expected 'Identifier' but received " + str(token_value) + "\n")
status = 1
return status
def variableDash(dataType):
status = 0
token = lexer()
token_type = list(token.keys())[0]
token_value = list(token.values())[0]
if(token_type == 'punctuator' and token_value == ','):
token = lexer()
token_type = list(token.keys())[0]
token_value = list(token.values())[0]
if(token_type == 'identifier'):
variableName = token_value.strip()
if(dataType not in externalVariables):
externalVariables[dataType] = list()
if(variableName not in externalVariables[dataType]):
externalVariables[dataType].append(variableName)
else:
print("Syntax error: The variable "+str(token_value)+" of type "+token_type+" has already been initiliazed.\n")
status = 1
if(status==0):
variableDash(dataType)
else:
print("Syntax error: expected 'Identifier' but received " + str(token_value) + "\n")
status = 1
else:
#RESET POINTERS SINCE A WRONG TOKEN WAS OBTAINED
global lb, fp
#print(token_value)
#print(str(lb) + " " + str(fp))
lb = lb - len(token_value)
fp = fp - len(token_value)
#print(str(lb) + " " + str(fp))
return status
def mainFunction():
status = 0
token = lexer()
token_type = list(token.keys())[0]
token_value = list(token.values())[0]
if(token_type == "dataType" and token_value == "int"):
status = mainDash()
else:
print("Syntax error: expected 'Return Type Integer' but received " + str(token_value) + "\n")
status = 1
return status
def mainDash():
status = 0
token = lexer()
token_type = list(token.keys())[0]
token_value = list(token.values())[0].strip()
#print(str(token_type) + " " + str(token_value))
if(token_type == "identifier" and token_value == "main"):
token = lexer()
token_type = list(token.keys())[0]
token_value = list(token.values())[0].strip()
if(token_type == "punctuator" and token_value == "("):
token = lexer()
token_type = list(token.keys())[0]
token_value = list(token.values())[0].strip()
if(token_type == "punctuator" and token_value == ")"):
token = lexer()
token_type = list(token.keys())[0]
token_value = list(token.values())[0].strip()
if(token_type == "punctuator" and token_value == "{"):
status = statements()
if(status == 0):
token = lexer()
token_type = list(token.keys())[0]
token_value = list(token.values())[0].strip()
#print(token_value + str(len(token_value)))
if(not(token_type == "punctuator" and token_value == "}")):
print("Syntax error: expected 'Punctuator1 close curly bracket' but received " + str(token_value) + "\n")
status = 1
else:
print("Syntax error: expected 'Punctuator open curly bracket' but received " + str(token_value) + "\n")
status = 1
elif(token_type == "dataType" and token_value == "int"):
token = lexer()
token_type = list(token.keys())[0]
token_value = list(token.values())[0].strip()
if(token_type == "identifier" and token_value == "argc"):
token = lexer()
token_type = list(token.keys())[0].strip()
token_value = list(token.values())[0].strip()
if(token_type == "punctuator" and token_value == ","):
token = lexer()
token_type = list(token.keys())[0]
token_value = list(token.values())[0].strip()
if(token_type == "dataType" and token_value == "char"):
token = lexer()
token_type = list(token.keys())[0]
token_value = list(token.values())[0].strip()
if(token_type == "arithmeticOperator" and token_value == "*"):
token = lexer()
token_type = list(token.keys())[0]
token_value = list(token.values())[0] .strip()
if(token_type == "identifier" and token_value == "argv"):
token = lexer()
token_type = list(token.keys())[0]
token_value = list(token.values())[0].strip()
if(token_type == "punctuator" and token_value == "["):
token = lexer()
token_type = list(token.keys())[0]
token_value = list(token.values())[0].strip()
if(token_type == "punctuator" and token_value == "]"):
token = lexer()
token_type = list(token.keys())[0]
token_value = list(token.values())[0].strip()
if(token_type == "punctuator" and token_value == ")"):
token = lexer()
token_type = list(token.keys())[0]
token_value = list(token.values())[0].strip()
if(token_type == "punctuator" and token_value == "{"):
status = statements()
if(status == 0):
token = lexer()
token_type = list(token.keys())[0]
token_value = list(token.values())[0].strip()
if(not(token_type == "punctuator" and token_value == "}")):
print("Syntax error: expected 'Punctuator2 close curly bracket' ", end = "")
print("but received " + str(token_value) + "\n")
status = 1
else:
print("Syntax error: expected 'Punctuator open curly bracket' ", end = "")
print("but received " + str(token_value) + "\n")
status = 1
else:
print("Syntax error: expected 'Punctuator close round bracket' but received ", end = "")
print(str(token_value) + "\n")
status = 1
else:
print("Syntax error: expected 'Punctuator close square bracket' but received ", end = "")
print(str(token_value) + "\n")
status = 1
else:
print("Syntax error: expected 'Punctuator open square bracket' but received ", end = "")
print(str(token_value) + "\n")
status = 1
else:
print("Syntax error: expected 'Identifier argv' but received " + str(token_value) + "\n")
status = 1
else:
print("Syntax error: expected 'Pointer operator *' but received " + str(token_value) + "\n")
status = 1
else:
print("Syntax error: expected 'Data type character' but received " + str(token_value) + "\n")
status = 1
else:
print("Syntax error: expected 'Punctuator comma' but received " + str(token_value) + "\n")
status = 1
else:
print("Syntax error: expected 'Identifier argc' but received " + str(token_value) + "\n")
status = 1
else:
print("Syntax error: expected 'Punctuator close round bracket' but received " + str(token_value) + "\n")
status = 1
else:
print("Syntax error: expected 'Punctuator open round bracket' but received " + str(token_value) + "\n")
status = 1
else:
print("Syntax error: expected 'Identifier main' but received " + str(token_value) + "\n")
status = 1
return status
data = {}
def statements():
#print("top of statements\n")
status = 0
status = initializationStatement()
global syntax_tree
if(status == 0):
#print("init success")
token = lexer()
token_type = list(token.keys())[0]
token_value = list(token.values())[0]
#print(token_value +" new value")
tv = token_value.strip()
if(token_type == "punctuator" and tv == ";"):
status = statements()
else:
print("Syntax error: expected 'Punctuator semicolon2' but received " + str(token_value) + "\n")
status = 1
else:
status = optionalDeclarationStatement()
#print(status)
if(status == 0):
#print("decl success")
token = lexer()
token_type = list(token.keys())[0]
token_value = list(token.values())[0]
tv = token_value.strip()
if(token_type == "punctuator" and tv == ";"):
status = statements()
else:
print("Syntax error: expected 'Punctuator semicolon3' but received " + str(token_value) + "\n")
status = 1
else:
status = assignmentStatement()
if(status == 0):
#print("assgn success")
syntax_tree += "assgn success\n"
token = lexer()
token_type = list(token.keys())[0]
token_value = list(token.values())[0]
tv = token_value.strip()
if(token_type == "punctuator" and tv == ";"):
status = statements()
else:
print("Syntax error: expected 'Punctuator semicolon4' but received " + str(token_value) + "\n")
status = 1
else:
status = 0
token = lexer()
token_type = list(token.keys())[0]
token_value = list(token.values())[0]
#print("IN statements: " + token_value)
if(token_type == "keyword" and token_value == "do"):
#print("Do")
global syntax_tree_do
syntax_tree_do = syntax_tree_do+1
token = lexer()
token_type = list(token.keys())[0]
token_value = list(token.values())[0].strip()
lab1()
syntax_tree_lab1()
if(token_type == "punctuator" and token_value == "{"):
#print("{")
status = statements()
#print("status: " + str(status))
if(status == 0):
token = lexer()
token_type = list(token.keys())[0]
token_value = list(token.values())[0].strip()
#print(token_value)
if(token_type == "punctuator" and token_value == "}"):
#print("}")
token = lexer()
token_type = list(token.keys())[0]
token_value = list(token.values())[0].strip()
syntax_tree_do = syntax_tree_do-1
if(syntax_tree_do == 0):
syntax_tree += "main --> do" + "\n"
else:
syntax_tree += "do --> do" + "\n"
if(token_type == "keyword" and token_value == "while"):
#print("while")
token = lexer()
token_type = list(token.keys())[0]
token_value = list(token.values())[0].strip()
if(token_type == "punctuator" and token_value == "("):
#print("(")
status = condition()
lab2()
syntax_tree_lab2()
if(status == 0):
token = lexer()
token_type = list(token.keys())[0]
token_value = list(token.values())[0].strip()
if(token_type == "punctuator" and token_value == ")"):
#print(")")
global syntax_tree_wh
syntax_tree += "while --> " + syntax_tree_wh[0] + "\n"
token = lexer()
token_type = list(token.keys())[0]
token_value = list(token.values())[0].strip()
if(token_type == "punctuator" and token_value == ";"):
#print("in statements: " + token_value + "\n")
status = statements()
if(syntax_tree_do == 0):
syntax_tree += "main --> while" + "\n"
else:
syntax_tree += "do --> while" + "\n"
else:
print("Syntax error: expected 'Punctuator semicolon5' ", end = "")
print("but received " + str(token_value) + "\n")
status = 1
else:
print("Syntax error: expected 'Punctuator close round bracket' ", end = "")
print("but received " + str(token_value) + "\n")
status = 1
else:
print("Syntax error: expected 'Punctuator open round bracket' ", end = "")
print("but received " + str(token_value) + "\n")
status = 1
else:
print("Syntax error: expected 'Keyword while' but received " + str(token_value) + "\n")
status = 1
else:
print("Syntax error: expected 'Punctuator10 close curly bracket' but received " + str(token_value) + "\n")
status = 1
else:
print("Syntax error: expected 'Punctuator open curly bracket' but received " + str(token_value) + "\n")
status = 1
else:
status = 0
tv = token_value.strip()
#print("IN statements: " + token_value)
if(tv == "{"):
status = statements()
#print("status: " + str(status))
if(status == 0):
token = lexer()
token_type = list(token.keys())[0]
token_value = list(token.values())[0].strip()
#print(token_value)
if(token_type == "punctuator" and token_value == "}"):
status = statements()
else:
print("Syntax error: expected 'Punctuator close curly bracket' but received " + str(token_value) + "\n")
else:
#RESET POINTERS SINCE A WRONG TOKEN WAS OBTAINED
global lb, fp
#print(token_value)
#print(str(lb) + " " + str(fp))
lb = lb - len(token_value)
fp = fp - len(token_value)
#status = 2
return status
def initializationStatement():
status = 0
global lb, fp
token = lexer()
token_type = list(token.keys())[0]
token_value = list(token.values())[0]
#print("initializationStatement", token_type, token_value)
if(token_type == "dataType"):
if(token_value not in data):
data[token_value] = {}
status = initStat(token_value)
else:
#RESET POINTERS SINCE A WRONG TOKEN WAS OBTAINED
#print(token_value)
#print(str(lb) + " " + str(fp))
lb = lb - len(token_value)
fp = fp - len(token_value)
status = 2
#print('returning' + str(status))
return status
def initStat(dt):
status = multipleInitialization(dt)
#print(status)
return status
def multipleInitialization(dt):
global data
status = 0
token = lexer()
token_type = list(token.keys())[0]
token_value = list(token.values())[0]
#print("multipleInitialization", token_type, token_value)
tk = token_value
if(token_type == "identifier"):
for data_type in data:
if(token_value in data[data_type]):
print("Syntax error:", token_value, "already declared as type", data_type)
sys.exit("FAILED PARSING")
push(tk)
syntax_tree_push(tk)
#print(tk)
if(token_value not in data[dt]):
if(dt=="int"):
data[dt][token_value]=int(0)
elif(dt=="char"):
data[dt][token_value]=str(0)
elif(dt=="float"):
data[dt][token_value]=float(0)
elif(dt=="double"):
data[dt][token_value]=float(0)
else:
data[dt][token_value]=0
#print(" "+token_value +":)")
else:
print("Syntax error: The variable has already been initialized\n")
return 1
token = lexer()
token_type = list(token.keys())[0]
token_value = list(token.values())[0]
tv = token_value.strip()
if(tv == ";"):
#print("; la")