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rules.py
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import re
import sys
from FA import check_var
# list token untuk syntax ke token
token_exp = [
(r'[ \t]+', None), # Tab char
(r'\/\/[^\n]*', None), # single line comment
(r'\/\*[\n]*[\t]*[\w\W]*[\n]*[\t]*\*\/', None), # /* multi line comment*/
# Integer and String
(r'\"[^\"\n]*\"', "STRING"), # "string" (apapun yang bukan " dan string)
(r'\'[^\'\n]*\'', "STRING"), # 'string'
(r'[\+\-]?[0-9]*\.[0-9]+(?!\w)', "NUM"), # membaca float (boleh diberikan + atau -), boleh tidak ada angka depan koma (e.g. -.9, +.34, +64,7)
(r'[\+\-]?[1-9][0-9]+(?!\w)', "NUM"), # membaca int, untuk 2 angka atau lebih
(r'[\+\-]?[0-9](?!\w)', "NUM"), # membaca int untuk tepat satu angka
# Delimiter
(r'\n', "NEWLINE"),
(r'\(', "KBKI"), # Kurung Biasa kiri
(r'\)', "KBKA"), # Kurung biasa kanan
(r'\[', "KSKI"), # Kurung Siku KIri
(r'\]', "KSKA"), # Kurung Siku kanan
(r'\{', "KKKI"), # Kurung Kurawal Kiri
(r'\}', "KKKA"), # Kurung kurawal kanan
(r'\;', "TITIKKOMA"),
(r'\:', "TITIKDUA"),
(r'\=\>', "ARROW"),
# Operator
# Assignment Operator
(r'\=(?!\=)', "EQ"),
(r'\+\=', "ADDAS"),
(r'\+\+', "INCREMENT"),
(r'\-\=', "SUBAS"),
(r'\-\-', "DECREMENT"),
(r'\*\=', "MULAS"),
(r'\/\=', "DIVAS"),
(r'\%\=', "MODAS"),
(r'\*\*\=', "POWAS"),
(r'\|\=', "BITORAS"),
(r'\&\=', "BITANDAS"),
(r'\?\?\=', "NULLISHAS"),
(r'\>\>\=', "BITRIGHTAS"),
(r'\<\<\=', "BITLEFTAS"),
# Logical Operator
(r'\<\=', "LEQ"),
(r'\>\=', "GEQ"),
(r'\<', "L"),
(r'\>', "G"),
(r'\!\=\=', "STRICTNEQ"),
(r'\!\=(?!\=)', "NEQ"),
(r'\=\=\=', "STRICTEQ"),
(r'\=\=(?!\=)', "ISEQ"),
(r'\&\&', "AND"),
(r'\|\|', "OR"),
(r'\!', "NOT"),
(r'\?\?', "NULLISH"),
# Aritmetical Operator
(r'\+', "ADD"),
(r'\-', "SUB"),
(r'\*', "MUL"),
(r'\/', "DIV"),
(r'\%', "MOD"),
(r'\*\*', "POW"),
(r'\^', "XOR"),
(r'\<\<', "BITLEFT"),
(r'\>\>', "BITRIGHT"),
(r'\|', "BITOR"),
(r'\&', "BITAND"),
(r'\~', "BITNOT"),
(r'\?', "TERNARY"),
# Function Operator
# Keyword
(r'\bif\b', "IF"),
(r'\belse if\b', "ELSE_IF"),
(r'\belse\b', "ELSE"),
(r'\bfor\b', "FOR"),
(r'\bin\b', "IN"),
(r'\bof\b', "OF"),
(r'\bdo\b', "DO"),
(r'\bwhile\b', "WHILE"),
(r'\bswitch\b', "SWITCH"),
(r'\bcase\b', "CASE"),
(r'\bdefault\b', "DEFAULT"),
(r'\btry\b', "TRY"),
(r'\bcatch\b', "CATCH"),
(r'\bfinally\b', "FINALLY"),
(r'\bthrow\b', "THROW"),
(r'\bdelete\b', "DELETE"),
(r'\bcontinue\b', "CONTINUE"),
(r'\bbreak\b', "BREAK"),
(r'\bfalse\b', "FALSE"),
(r'\btrue\b', "TRUE"),
(r'\bnull\b', "NULL"),
(r'\bundefined\b', "UNDEFINED"),
(r'\bclass\b', "CLASS"),
(r'\bfunction\b', "FUNCTION"),
(r'\breturn\b', "RETURN"),
(r'\bextends\b', "EXTENDS"),
(r'\bnew\b', "NEW"),
(r'\bfrom\b', "FROM"),
(r'\bimport\b', "IMPORT"),
(r'\bas\b', "AS"),
(r'\braise\b', "RAISE"),
(r'\bwith\b', "WITH"),
(r'\bnull\b', "NULL"),
(r'\blet\b', "TYPE"),
(r'\bvar\b', "TYPE"),
(r'\bconst\b', "TYPE"),
(r'\bthis.[A-Za-z_][A-Za-z0-9_]*\b', "ID"),
(r'\,', "COMMA"),
(r'\w+([.]\w+)+', "ID"),
(r'\.', "TITIK"),
(r'\bis\b', "IS"),
(r'\'\'\'[(?!(\'\'\'))\w\W]*\'\'\'', "MULTILINE"),
(r'\"\"\"[(?!(\"\"\"))\w\W]*\"\"\"', "MULTILINE"),
(r'[A-Za-z0-9_][A-Za-z0-9_]*', "ID"),
]
"""
Keterangan:
\ -> setiap pembacaan karakter diawali dengan ini, contoh pembacaan "a", maka \a
^ -> tanda negasi
? (e.g. a?b) -> a cuma boleh muncul sekali atau tidak sama sekali
+ (e.g. a+) -> repetisi muncul a, minimal a muncul sekali (tidak boleh epsilon)
* (e.g. a*) -> repetisi muncul a, boleh epsilon
x(?!y) -> munculnya karakter x tidak boleh diikuti oleh y
"""
def checkVariabel(input,start,end):
temp = ""
while(start < end):
temp += input[start]
start += 1
if (not (check_var(temp))):
print("ERROR : NAMA VARIABEL",temp,"SALAH")
sys.exit(1)
def lexer(input, token_exp):
posAbs = 0 # Menggambarkan posisi absolute terhadap posisi start file
posRel = 1 # Menggambarkan posisi relative terhadap new line
line = 1 # Menggambarkan banyaknya jumlah line dalam file
# Array untuk menampung token yang dibaca dari file
tokenResult = []
#Membaca file sampai selesai
while(posAbs < len(input)):
checkVar = False
#Jika membaca new line, posRel direset ke 1 dan jumlah line bertambah 1
if(input[posAbs] == '\n'):
posRel = 1
line +=1
# Looping token di dalam token_exp
for token in token_exp:
# Pecah token menjadi pattern dan tag (tag = Nama token)
pattern,tag = token
# Mengubah string di regex menjadi sebuah pattern dalam bentuk regex
regex = re.compile(pattern)
# isMatched bernilai benar kalau ada regex yang sama dengan value atau kata yang dibaca
isMatched = regex.match(input,posAbs)
#Jika ada regex yang memenuhi value, cek value tag
if(isMatched):
#Jika tag tidak bernilai None, masukan tag ke dalam token result
if (tag):
if(tag == "ID"):
startVar = posAbs
checkVar = True
tokenResult.append(tag)
break #break kalau sudah ketemu dan terjadi akuisisi, sehingga tidak melanjutkan looping sampai token_exp terakhir
#Kalau misalnya tidak ada regex yang memenuhi value yang sedang dibaca
if not isMatched :
#Syntax salah dan program pasti salah
print('Illegal Move')
print("Sytax ERROR")
sys.exit(1)
else:
posAbs = isMatched.end(0) #pindahin pos ke akhir pembacaan value yang matched dengan regex
if(checkVar):
checkVariabel(input,startVar,posAbs)
checkVar = False
posRel += 1
#Mengembalikan token result
return tokenResult
def createToken(namaFile):
file = open(namaFile)
input = file.read()
file.close()
return(lexer(input,token_exp))
# createToken('tes.js')
'''
Kumpulin Komen
# (r'\brange\b', "RANGE"),
# (r'\bthen\b', "THEN"),
# (r'\bdict\b', "TYPE"),
# (r'\bint\b', "TYPE"),
# (r'\bstr\b', "TYPE"),
# (r'\bfloat\b', "TYPE"),
# (r'\bcomplex\b', "TYPE"),
# (r'\blist\b', "TYPE"),
# (r'\btuple\b', "TYPE"),
# (r'\bset\b', "TYPE"),
# (r'\bconstructor\b', "CONSTRUCTOR"),
# (r'\bformat\b', "FORMAT"),
'''