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1 # -----------------------------------------------------------------------------
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2 # lex_opt_alias.py
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3 #
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4 # Tests ability to match up functions with states, aliases, and
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5 # lexing tables.
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6 # -----------------------------------------------------------------------------
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7
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8 import sys
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9 if ".." not in sys.path: sys.path.insert(0,"..")
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10
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11 tokens = (
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12 'NAME','NUMBER',
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13 )
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14
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15 states = (('instdef','inclusive'),('spam','exclusive'))
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16
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17 literals = ['=','+','-','*','/', '(',')']
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18
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19 # Tokens
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20
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21 def t_instdef_spam_BITS(t):
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22 r'[01-]+'
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23 return t
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24
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25 t_NAME = r'[a-zA-Z_][a-zA-Z0-9_]*'
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26
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27 def NUMBER(t):
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28 r'\d+'
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29 try:
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30 t.value = int(t.value)
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31 except ValueError:
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32 print("Integer value too large %s" % t.value)
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33 t.value = 0
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34 return t
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35
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36 t_ANY_NUMBER = NUMBER
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37
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38 t_ignore = " \t"
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39 t_spam_ignore = t_ignore
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40
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41 def t_newline(t):
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42 r'\n+'
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43 t.lexer.lineno += t.value.count("\n")
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44
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45 def t_error(t):
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46 print("Illegal character '%s'" % t.value[0])
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47 t.lexer.skip(1)
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48
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49 t_spam_error = t_error
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50
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51 # Build the lexer
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52 import ply.lex as lex
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53 lex.lex(optimize=1,lextab="aliastab")
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54 lex.runmain(data="3+4")
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