55 lines
1.1 KiB
Python
55 lines
1.1 KiB
Python
# -----------------------------------------------------------------------------
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# lex_opt_alias.py
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#
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# Tests ability to match up functions with states, aliases, and
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# lexing tables.
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# -----------------------------------------------------------------------------
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import sys
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if ".." not in sys.path: sys.path.insert(0,"..")
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tokens = (
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'NAME','NUMBER',
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)
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states = (('instdef','inclusive'),('spam','exclusive'))
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literals = ['=','+','-','*','/', '(',')']
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# Tokens
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def t_instdef_spam_BITS(t):
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r'[01-]+'
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return t
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t_NAME = r'[a-zA-Z_][a-zA-Z0-9_]*'
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def NUMBER(t):
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r'\d+'
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try:
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t.value = int(t.value)
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except ValueError:
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print("Integer value too large %s" % t.value)
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t.value = 0
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return t
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t_ANY_NUMBER = NUMBER
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t_ignore = " \t"
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t_spam_ignore = t_ignore
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def t_newline(t):
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r'\n+'
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t.lexer.lineno += t.value.count("\n")
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def t_error(t):
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print("Illegal character '%s'" % t.value[0])
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t.lexer.skip(1)
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t_spam_error = t_error
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# Build the lexer
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import ply.lex as lex
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lex.lex(optimize=1,lextab="aliastab")
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lex.runmain(data="3+4")
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