compiler_lex.py

#T {int,num,id}
#Tl {=}
#N {DclVar}
#S: Progamme
#P{
#DclVar -> int id = num 
#        | int id num
#        | int id
#}


import ply.lex as lex




tokens = ['num', 'id', 'int','print','println','prints','string','main','repeat','read','sup','inf','eq','supeq'
,'infeq','not','diff','and','or','if','else','for','while','plus','addeq','subeq','diveq','muleq','addeql','subeql','diveql'
,'muleql','minus','plusl','minusl','modeq','modeql','return','global','gid']
literals = ['=','(',')','{','}','+','*','-','/','[',']',';','%',',']


def t_numR(t):
    r'\d+\.\d+'
    t.value = float(t.value)    
    return t

def t_num(t):
    r'\d+'
    t.value = int(t.value)    
    return t

def t_string(t):
    r'"[^"]*"'
    return t

def t_return(t):
    r'return'
    return t

def t_global(t):
    r'global'
    return t

def t_println(t):
    r'println'
    return t

def t_read(t):
    r'read'
    return t

def t_prints(t):
    r'prints'
    return t

def t_print(t):
    r'print'
    return t

def t_int(t):
    r'int'
    return t

def t_for(t):
    r'for'
    return t

def t_while(t):
    r'while'
    return t

def t_vars(t):
    r'vars'
    return t

def t_repeat(t):
    r'repeat'
    return t

def t_main(t):
    r'main'
    return t

def t_if(t):
    r'if'
    return t

def t_else(t):
    r'else'
    return t

def t_diveql(t):
    r'\./='
    return t

def t_addeql(t):
    r'\.\+\='
    return t

def t_subeql(t):
    r'\.\-\='
    return t



def t_muleql(t):
    r'\.\*\='
    return t

def t_modeql(t):
    r'\.\%\='
    return t

def t_plus(t):
    r'\+\+'
    return t

def t_plusl(t):
    r'\.\+'
    return t

def t_minus(t):
    r'--'
    return t

def t_minusl(t):
    r'\.-'
    return t

def t_addeq(t):
    r'\+\='
    return t

def t_subeq(t):
    r'\-\='
    return t

def t_diveq(t):
    r'/='
    return t

def t_muleq(t):
    r'\*\='
    return t

def t_modeq(t):
    r'\%\='
    return t


def t_supeq(t):
    r'>='
    return t

def t_infeq(t):
    r'<='
    return t

def t_sup(t):
    r'>'
    return t

def t_inf(t):
    r'<'
    return t

def t_diff(t):
    r'!='
    return t

def t_not(t):
    r'!'
    return t

def t_eq(t):
    r'=='
    return t

def t_and(t):
    r'&&'
    return t

def t_or(t):
    r'\|\|'
    return t

def t_gid(t):
    r'&[a-zA-Z]\w*'
    return t


def t_id(t):
    r'[a-zA-Z]\w*'
    return t




t_ignore = " \t\n"

# Tratamento de erros
def t_error(t):
    print('Caracter ilegal:', t.value[0])
    t.lexer.skip(1)


# Build the lexer
lexer = lex.lex()