Yet-Another-Programming-Language/lexer.py at master · zaibugemi/Yet-Another-Programming-Language · GitHub

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import ply.lex as lex
import re


t_ignore = ' \t'

tokens = (
    'DOT',
    'STRUCT',
    'LBRACE',
    'RBRACE',
    'VARTYPE',
    'INT',
    'DOUBLE',
    'CHAR',
    'STRING',
    'BOOL',
    'IDENTIFIER',
    'COMMA',
    'SEMICOLON',
    'PLUS',         #done
    'MINUS',        #done
    'DIVIDE',       #done
    'MULTIPLY',     #done
    'POWER',        #done
    'MODULO',       #done
    'INCREMENT',    #done
    'DECREMENT',    #done
    'LT',
    'GT',
    'LE',
    'GE',
    'EQUAL',
    'NOTEQUAL',
    'ISEQUAL',
    'NOT',
    'AND',
    'OR',
    'LPARAN',
    'RPARAN',
    'PRINT',
)

def t_error(t):
    print('Unrecognized token "%s"' % t.value)
    t.lexer.skip(1)

def t_DOT(t):
    r'\.'
    return t

def t_STRUCT(t):
    r'(\bSTRUCT\b)'
    return t

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

def t_DECREMENT(t):
    r'\-\-'
    return t

def t_VARTYPE(t):
    r'(\bINT\b)|(\bSTRING\b)|(\bCHAR\b)|(\bDOUBLE\b)|(\bBOOL\b)'
    return t

def t_BOOL(t):
    r'(\bTRUE\b)|(\bFALSE\b)'
    return t

def t_SEMICOLON(t):
    r'\;'
    return t

def t_COMMA(t):
    r'\,'
    return t

def t_PRINT(t):
    r'PRINT'
    return t

def t_IDENTIFIER(t):
    r'[a-zA-Z_][a-zA-Z_0-9]*'
    return t

def t_ISEQUAL(t):
    r'\=\='
    return t

def t_EQUAL(t):
    r'\='
    return t

def t_LPARAN(t):
    r'\('
    return t

def t_RPARAN(t):
    r'\)'
    return t

def t_LBRACE(t):
    r'\{'
    return t

def t_RBRACE(t):
    r'\}'
    return t

def t_DOUBLE(t):
    r'-?[0-9]+[.][0-9]+'
    t.value = float(t.value)
    return t

def t_INT(t):
    r'-?[0-9]+'
    t.value = int(t.value)
    return t

def t_CHAR(t):
    r'"[a-zA-Z]"'
    t.value = t.value[1:-1]
    return t

def t_STRING(t):
    r'"[^"]*"'
    t.value = t.value[1:-1]
    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_DIVIDE(t):
    r'\/'
    return t

def t_POWER(t):
    r'\^'
    return t

def t_MODULO(t):
    r'\%'
    return t

def t_LE(t):
    r'\<\='
    return t

def t_GE(t):
    r'\>\='
    return t

def t_LT(t):
    r'\<'
    return t

def t_GT(t):
    r'\>'
    return t

def t_NOTEQUAL(t):
    r'\!\='
    return t

def t_NOT(t):
    r'\!'
    return t

def t_AND(t):
    r'\&\&'
    return t

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


def t_newline(t):
    r'\n+'
    t.lexer.lineno += len(t.value)