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emscripten-core
GitHub Repository: emscripten-core/emscripten
 Path: blob/main/third_party/ply/test/lex_optimize3.py
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# -----------------------------------------------------------------------------

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# lex_optimize3.py

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#

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# Writes table in a subdirectory structure.

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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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import ply.lex as lex

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tokens = (

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    'NAME','NUMBER',

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    'PLUS','MINUS','TIMES','DIVIDE','EQUALS',

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    'LPAREN','RPAREN',

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    )

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# Tokens

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t_PLUS    = r'\+'

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t_MINUS   = r'-'

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t_TIMES   = r'\*'

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t_DIVIDE  = r'/'

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t_EQUALS  = r'='

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t_LPAREN  = r'\('

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t_RPAREN  = r'\)'

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t_NAME    = r'[a-zA-Z_][a-zA-Z0-9_]*'

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def t_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_ignore = " \t"

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def t_newline(t):

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    r'\n+'

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    t.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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# Build the lexer

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lex.lex(optimize=1,lextab="lexdir.sub.calctab",outputdir="lexdir/sub")

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lex.runmain(data="3+4")

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