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LexDefinition.py
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LexDefinition.py
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def defineTokens():
tokens = (
#SPECIAL CHARACTERS
"OPEN_BRACES", #{
"CLOSING_BRACES",#}
"COMA",#,
"SEMICOLON", #;
"OPEN_PARENTH", #(
"CLOSING_PARENTH", #)
"OPEN_BRACKET",#[
"CLOSING_BRACKET",#]
##ARITHMETIC OPERATORS
"EQUAL",#=
"PLUS",#+
"MINUS",#-
"MULTIPLY",#*
"DIVISION",#/
"PLUSPLUS", #++
"MINUSMINUS",#--
##BOOLEAN OPERATORS
"OR",#||
"AND",#&&
"NOT",#!
#COMPARATION OPERATORS
"EQUAL_EQUAL", #==
"NOT_EQUAL",#!=
"BIGGER_THAN",#>
"LOWER_THAN",#<
##RESERVED WORDS
"ID",#id
"PRINT",#print
"READ",#read
"IF",#if
"ELSE",#else
"WHILE",#while
"DO",#do
"FOR",#for
"FUNCTION",#function
"MAIN", #main
##NUMERIC TYPES
"INT", #int
"DOUBLE", #double
"CONSTANT", #digito+
"id"#letra(letra/digito)*
)
return tokens
def t_OPEN_BRACES(t):
r'{'
return t
def t_CLOSING_BRACES(t):
r'}'
return t
def t_COMA(t):
r'\,'
return t
def t_SEMICOLON(t):
r'\;'
return t
def t_OPEN_PARENTH(t):
r'('
return t
def t_CLOSING_PARENTH(t):
r')'
return t
def t_OPEN_BRACKET(t):
r'['
return t
def t_CLOSING_BRACKET(t):
r']'
return t
#ARITMETHIC
def t_EQUAL(t):
r'='
return t
def t_PLUS(t):
r'+'
return t
def t_MINUS(t):
r'-'
return t
def t_MULTIPLY(t):
r'*'
return t
def t_DIVISION(t):
r'/'
return t
def t_PLUSPLUS(t):
r'++'
return t
def t_MINUSMINUS(t):
r'--'
return t
#BOOLEAN OPERATOR
def t_OR(t):
r'||'
return t
def t_AND(t):
r'&&'
return t
def t_NOT(t):
r'!'
return t
#COMPARATION
def t_EQUALEQUAL(t):
r'=='
return t
def T_NOT_EQUAL(t):
r'!='
return t
def t_BIGGER_THAN(t):
r'>'
return t
def t_LOWER_THAN(t):
r'<'
return t
#RESERVED WORDS
def t_ID(t):
r'([a-z]+[0-9]*)'
return t
def t_PRINT(t):
r'print'
return t
def t_READ(t):
r'read'
return t
def t_IF(t):
r'if'
return t
def t_ELSE(t):
r'else'
return t
def t_WHILE(t):
r'while'
return t
def t_DO(t):
r'do'
return t
def t_FOR(t):
r'for'
return t
def t_FUNCTION(t):
r'function'
return t
def t_MAIN(t):
r'main'
return t
##NUMERIC TYPES
def t_INT(t):
r'int'
return t
def t_DOUBLE(t):
r']'
return t
def t_CONSTANT(t):
r'^[-+]?[0-9]+[.]?[0-9]*'
return t