def callStat(callId):
global token
global a
global param
global counter
global temp
if counter == 0:
a = intermediate.newTemp()
param.append(a)
counter += 1
if token[0] == "Id":
functionItem, _ = symbolTable.findEntity(token[1])
procedureName = token[1]
token = lexi.lex()
actualPars(procedureName, functionItem)
if token[0] == "rightparenthesisTk" or token[0]== "commaTk":
intermediate.genQuad("par", temp, "RET", "_")
intermediate.genQuad("call", callId, "_", "_")
else:
for i in range(1,len(param)):
intermediate.genQuad("par",param[i],"in","_")
intermediate.genQuad("par",param[0],"RET","_")
intermediate.genQuad("call", callId, "_", "_")
counter = 0
param = []
else:
line = lexi.getLineAndColumn()
print("Syntax error: 'function' name is missing at line " + str(line[0]+1)+".")
exit()
def forcaseStat():
global token
flag = intermediate.newTemp()
forQuad = intermediate.nextQuad()
intermediate.genQuad(":=", "0", "_", flag)
while token[0] != "endforcase":
if token[0] == "when":
token = lexi.lex()
(bTrue, bFalse) = condition()
intermediate.backPatch(bTrue, intermediate.nextQuad())
if token[0] == "upDownTk":
token = lexi.lex()
statements()
genQuad(":=", "1", "_", flag)
intermediate.backPatch(bFalse, intermediate.nextQuad())
else:
line = lexi.getLineAndColumn()
print("Syntax error: expected ':' at line " + str(line[0]+1)+".")
exit()
else:
line = lexi.getLineAndColumn()
print("Syntax error: expected 'when' at line " + str(line[0]+1)+".")
exit()
intermediate.genQuad("=", flag, "1", forQuad)
token = lexi.lex()
return
def term(): global token f1 = factor() #first term of factor while token[0] == "mulOperTk": tokenOper = token[1] #operator (* or /) mulOper() #moves lex to next token f2 = factor() #second term of factor w = intermediate.newTemp() # new variable intermediate.quads.append([tokenOper, f1, f2, w]) f1 = w #the total sum to this point return f1
def expression(): global token optionalSign() t1 = term() #first term of expression while token[0] == "addOperTk": tokenOper = token[1] #operator (+ or -) addOper() t2 = term() #second term of expression w = intermediate.newTemp() intermediate.genQuad(tokenOper,t1,t2,w) t1 = w return t1
def idTail(identifier):
global var
global token
global funcList
functionItem, _ = symbolTable.findEntity(identifier)
a = actualPars(identifier, functionItem)
if identifier in funcList:
current_Temp = intermediate.newTemp()
intermediate.genQuad("par",current_Temp,"RET","_")
intermediate.genQuad("call",identifier,"_","_")
intermediate.genQuad(":=",current_Temp,"_",var)
return a
def actualParitem(functionItem, argumentId):
global token
global param
global counter
global temp
if token[0] == "in":
if functionItem.argumentList[argumentId].isIn == False:
print("Expected 'inout' but found 'in'")
exit()
token = lexi.lex()
actualParId = token[1]
exp = expression()
intermediate.genQuad("par", exp, "CV", "_")
return
elif token[0] == "inout":
if functionItem.argumentList[argumentId].isIn == True:
print("Expected 'in' but found 'inout'")
exit()
token = lexi.lex()
if token[0] == "Id":
checkUndeclaredIdentifier()
actualParId = token[1]
intermediate.genQuad("par", actualParId, "REF", "_")
token = lexi.lex()
return
else:
line = lexi.getLineAndColumn()
print("Syntax error: 'Parameter' is missing at line " + str(line[0]+1)+".")
exit()
elif token[0] == "call":
temp = intermediate.newTemp()
param.append(temp)
counter += 1
token = lexi.lex()
callId = token[1]
callStat(callId)
else:
line = lexi.getLineAndColumn()
print("Syntax error: 'in' or 'inout' is missing at line " + str(line[0] + 1) +".")
exit()