cscg24-lolpython

CSCG 2024 Challenge 'Can I Haz Lolpython?'
git clone https://git.sinitax.com/sinitax/cscg24-lolpython
Log | Files | Refs | sfeed.txt

basiclex.py (1165B)

      1# An implementation of Dartmouth BASIC (1964)
      2
      3from ply import *
      4
      5keywords = (
      6    'LET','READ','DATA','PRINT','GOTO','IF','THEN','FOR','NEXT','TO','STEP',
      7    'END','STOP','DEF','GOSUB','DIM','REM','RETURN','RUN','LIST','NEW',
      8)
      9
     10tokens = keywords + (
     11     'EQUALS','PLUS','MINUS','TIMES','DIVIDE','POWER',
     12     'LPAREN','RPAREN','LT','LE','GT','GE','NE',
     13     'COMMA','SEMI', 'INTEGER','FLOAT', 'STRING',
     14     'ID','NEWLINE'
     15)
     16
     17t_ignore = ' \t'
     18
     19def t_REM(t):
     20    r'REM .*'
     21    return t
     22
     23def t_ID(t):
     24    r'[A-Z][A-Z0-9]*'
     25    if t.value in keywords:
     26        t.type = t.value
     27    return t
     28    
     29t_EQUALS  = r'='
     30t_PLUS    = r'\+'
     31t_MINUS   = r'-'
     32t_TIMES   = r'\*'
     33t_POWER   = r'\^'
     34t_DIVIDE  = r'/'
     35t_LPAREN  = r'\('
     36t_RPAREN  = r'\)'
     37t_LT      = r'<'
     38t_LE      = r'<='
     39t_GT      = r'>'
     40t_GE      = r'>='
     41t_NE      = r'<>'
     42t_COMMA   = r'\,'
     43t_SEMI    = r';'
     44t_INTEGER = r'\d+'    
     45t_FLOAT   = r'((\d*\.\d+)(E[\+-]?\d+)?|([1-9]\d*E[\+-]?\d+))'
     46t_STRING  = r'\".*?\"'
     47
     48def t_NEWLINE(t):
     49    r'\n'
     50    t.lexer.lineno += 1
     51    return t
     52
     53def t_error(t):
     54    print "Illegal character", t.value[0]
     55    t.lexer.skip(1)
     56
     57lex.lex()
     58
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     65       
     66   
     67  
     68            
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