def simpleStmt():
if pyFunc.s == IDENT:
var = pyFunc.val
pyFunc.getSym()
if pyFunc.s == EQ:
pyFunc.getSym()
e = expr()
print('load: ' + var + ' ' + str(e))
def term():
t = factor()
if pyFunc.s == STAR:
pyFunc.getSym()
t2 = factor()
print("mul: " + str(t) + ' ' + str(t2))
if pyFunc.s == SLASH:
pyFunc.getSym()
t2 = factor()
print("div: " + str(t) + ' ' + str(t2))
return t
def expr():
t = term()
if pyFunc.s == PLUS:
pyFunc.getSym()
t2 = term()
print("sum: " + str(t) + ' ' + str(t2))
if pyFunc.s == MINUS:
pyFunc.getSym()
t2 = term()
print("min: " + str(t) + ' ' + str(t2))
return t
def returnStmt():
global commset
code = ''
if pyFunc.s == RETURN:
pyFunc.getSym()
code = code + 'ret: e' + str(commset)
print(code)
print('e'+str(commset)+':')
expr()
print('end e'+str(commset))
commset = commset+1
def booleanStmt(bid):
global bools
print('b' + str(bid) + ':')
boolTerm(bid)
if pyFunc.s == OR:
print('end b' + str(bid))
pyFunc.getSym()
bools = bools + 1
booleanStmt(bid+1)
else:
print('end b'+str(bid))
def simplePy(src):
global indent, loop, bools, scopestack, commset, cond
commset = 1
cond = 1
loop = 1
scopestack = []
bools = 1
indent = 0
pyFunc.init(src)
while pyFunc.s == INDENT:
pyFunc.getSym()
symtab.init()
program()
def stmt(lvl):
global indent, scopestack,boolean
while pyFunc.s == INDENT:
lvl = lvl + 1
pyFunc.getSym()
if lvl == indent:
i = pyFunc.index
compStmt()
if i == pyFunc.index:
simpleStmt()
if i == pyFunc.index:
returnStmt()
elif lvl < indent:
print('end ' + scopestack[len(scopestack)-1])
indent = indent - 1
scopestack.pop()
stmt(lvl)
def factor():
if pyFunc.s == NUM:
val = pyFunc.val
print('get: ' + str(val))
pyFunc.getSym()
return val
if pyFunc.s == IDENT:
val = pyFunc.val
print('get: ' + str(val))
pyFunc.getSym()
return val
elif pyFunc.s == LPAREN:
pyFunc.getSym()
e = expr()
if pyFunc.s == RPAREN:
pyFunc.getSym()
return e
def function():
global indent, scopestack
if pyFunc.s == DEF:
pyFunc.getSym()
if pyFunc.s == MAIN:
pyFunc.getSym()
if pyFunc.s == COLON:
pyFunc.getSym()
scopestack = scopestack + ['main']
indent = indent + 1
def boolFact(bid):
global bools
comparison(bid)
if pyFunc.s == MINUS:
pyFunc.getSym()
boolFact(bid)
elif pyFunc.s == LPAREN:
pyFunc.getSym()
bools = bools + 1
booleanStmt(bid+1)
if pyFunc.s == RPAREN:
pyFunc.getSym()
def compStmt():
global loop, indent, scopestack, cond, bools
if pyFunc.s == FOR:
loopid = loop
code = 'iter ' + str(loopid) + ':'
print(code)
loop = loop + 1
pyFunc.getSym()
if pyFunc.s == IDENT:
var = pyFunc.val
pyFunc.getSym()
if pyFunc.s == IN:
pyFunc.getSym()
if pyFunc.s == RANGE:
pyFunc.getSym()
if pyFunc.s == LPAREN:
pyFunc.getSym()
if pyFunc.s == NUM or pyFunc.s == IDENT:
print("start: ")
print('set ' + var + ' ' + str(pyFunc.val))
pyFunc.getSym()
if pyFunc.s == COMMA:
pyFunc.getSym()
if pyFunc.s == NUM or pyFunc.s == IDENT:
print('while: ')
print('LT ' + var + ' ' +str(pyFunc.val))
pyFunc.getSym()
if pyFunc.s == COMMA:
pyFunc.getSym()
if pyFunc.s == NUM or pyFunc.s == IDENT:
print('update:')
print('sum '+ var + ' ' + var + ' ' + str(pyFunc.val))
pyFunc.getSym()
else:
raise Exception
else:
raise Exception
if pyFunc.s == RPAREN:
pyFunc.getSym()
if pyFunc.s == COLON:
pyFunc.getSym()
indent = indent + 1
scopestack = scopestack + ['iter'+str(loopid)]
elif pyFunc.s == WHILE:
loopid = loop
loop = loop + 1
condid = cond
cond = cond + 1
pyFunc.getSym()
print('iter' + str(loopid) + ':')
if pyFunc.s == LPAREN:
pyFunc.getSym()
i = pyFunc.index
print('while:')
booleanStmt(bools)
if i != pyFunc.index:
if pyFunc.s == RPAREN:
pyFunc.getSym()
if pyFunc.s == COLON:
pyFunc.getSym()
indent = indent + 1
scopestack = scopestack + ['iter'+str(loopid)]
elif pyFunc.s == IF:#
pyFunc.getSym()
condid = cond
cond = cond + 1
print('cond'+str(condid)+':')
booleanStmt(bools)
bools = bools + 1
if pyFunc.s == COLON:
pyFunc.getSym()
indent = indent + 1
scopestack = scopestack + ['cond'+str(condid)]
elif pyFunc.s == ELIF:
pyFunc.getSym()
condid = cond
cond = cond + 1
print('cond'+str(condid)+':')
booleanStmt(bools)
bools = bools + 1
if pyFunc.s == COLON:
pyFunc.getSym()
indent = indent + 1
scopestack = scopestack + ['cond'+str(condid)]
elif pyFunc.s == ELSE:
pyFunc.getSym()
condid = cond
cond = cond + 1
print('cond'+str(condid)+':')
booleanStmt(bools)
bools = bools + 1
if pyFunc.s == COLON:
pyFunc.getSym()
indent = indent + 1
scopestack = scopestack + ['cond'+str(condid)]
def importstmt():
if pyFunc.s == IMPORT:
pyFunc.getSym()
if pyFunc.s == IDENT:
print("fetch: " + pyFunc.val)
pyFunc.getSym()
def comparison(bid):
if pyFunc.s == IDENT:
v1 = pyFunc.val
pyFunc.getSym()
if pyFunc.s == EQUAL:
pyFunc.getSym()
if pyFunc.s == IDENT:
print('EQ: ' + str(v1) + ' '+ str(pyFunc.val))
pyFunc.getSym()
elif pyFunc.s == NUM:
print('EQ: ' + str(v1) + ' '+ str(pyFunc.val))
pyFunc.getSym()
elif pyFunc.s == GT:
pyFunc.getSym()
if pyFunc.s == IDENT:
print('GT: ' + str(v1) + ' '+ str(pyFunc.val))
pyFunc.getSym()
elif pyFunc.s == NUM:
print('GT: ' + str(v1) + ' '+ str(pyFunc.val))
pyFunc.getSym()
elif pyFunc.s == LT:
pyFunc.getSym()
if pyFunc.s == IDENT:
print('LT: ' + str(v1) + ' '+ str(pyFunc.val))
pyFunc.getSym()
elif pyFunc.s == NUM:
print('LT: ' + str(v1) + ' '+ str(pyFunc.val))
pyFunc.getSym()
elif pyFunc.s == GTE:
pyFunc.getSym()
if pyFunc.s == IDENT:
print('GTE: ' + str(v1) + ' '+ str(pyFunc.val))
pyFunc.getSym()
elif pyFunc.s == NUM:
print('GTE: ' + str(v1) + ' '+ str(pyFunc.val))
pyFunc.getSym()
elif pyFunc.s == LTE:
pyFunc.getSym()
if pyFunc.s == IDENT:
print('LTE: ' + str(v1) + ' '+ str(pyFunc.val))
pyFunc.getSym()
elif pyFunc.s == NUM:
print('LTE: ' + str(v1) + ' '+ str(pyFunc.val))
pyFunc.getSym()
if pyFunc.s == NUM:
v1 = pyFunc.val
pyFunc.getSym()
if pyFunc.s == EQ:
pyFunc.getSym()
if pyFunc.s == EQ:
pyFunc.getSym()
if pyFunc.s == IDENT:
print('EQ: ' + str(v1) + ' '+ str(pyFunc.val))
pyFunc.getSym()
elif pyFunc.s == NUM:
print('EQ: ' + str(v1) + ' '+ str(pyFunc.val))
pyFunc.getSym()
elif pyFunc.s == GT:
pyFunc.getSym()
if pyFunc.s == IDENT:
print('GT: ' + str(v1) + ' '+ str(pyFunc.val))
pyFunc.getSym()
elif pyFunc.s == NUM:
print('GT: ' + str(v1) + ' '+ str(pyFunc.val))
pyFunc.getSym()
elif pyFunc.s == LT:
pyFunc.getSym()
if pyFunc.s == IDENT:
print('LT: ' + str(v1) + ' '+ str(pyFunc.val))
pyFunc.getSym()
elif pyFunc.s == NUM:
print('LT: ' + str(v1) + ' '+ str(pyFunc.val))
pyFunc.getSym()
elif pyFunc.s == GTE:
pyFunc.getSym()
if pyFunc.s == IDENT:
print('GTE: ' + str(v1) + ' '+ str(pyFunc.val))
pyFunc.getSym()
elif pyFunc.s == NUM:
print('GTE: ' + str(v1) + ' '+ str(pyFunc.val))
pyFunc.getSym()
elif pyFunc.s == LTE:
pyFunc.getSym()
if pyFunc.s == IDENT:
print('LTE: ' + str(v1) + ' '+ str(pyFunc.val))
pyFunc.getSym()
elif pyFunc.s == NUM:
print('LTE: ' + str(v1) + ' '+ str(pyFunc.val))
pyFunc.getSym()
def boolTerm(bid):
boolFact(bid)
if pyFunc.s == AND:
pyFunc.getSym()
boolTerm(bid)