1 """engine.SCons.Variables.EnumVariable
3 This file defines the option type for SCons allowing only specified
9 opts.Add(EnumVariable('debug', 'debug output and symbols', 'no',
10 allowed_values=('yes', 'no', 'full'),
11 map={}, ignorecase=2))
13 if env['debug'] == 'full':
18 # Copyright (c) 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010 The SCons Foundation
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21 # a copy of this software and associated documentation files (the
22 # "Software"), to deal in the Software without restriction, including
23 # without limitation the rights to use, copy, modify, merge, publish,
24 # distribute, sublicense, and/or sell copies of the Software, and to
25 # permit persons to whom the Software is furnished to do so, subject to
26 # the following conditions:
28 # The above copyright notice and this permission notice shall be included
29 # in all copies or substantial portions of the Software.
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32 # KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
33 # WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
34 # NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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40 __revision__ = "src/engine/SCons/Variables/EnumVariable.py 5023 2010/06/14 22:05:46 scons"
42 __all__ = ['EnumVariable',]
47 def _validator(key, val, env, vals):
49 raise SCons.Errors.UserError(
50 'Invalid value for option %s: %s' % (key, val))
53 def EnumVariable(key, help, default, allowed_values, map={}, ignorecase=0):
55 The input parameters describe a option with only certain values
56 allowed. They are returned with an appropriate converter and
57 validator appended. The result is usable for input to
60 'key' and 'default' are the values to be passed on to Variables.Add().
62 'help' will be appended by the allowed values automatically
64 'allowed_values' is a list of strings, which are allowed as values
67 The 'map'-dictionary may be used for converting the input value
68 into canonical values (eg. for aliases).
70 'ignorecase' defines the behaviour of the validator:
72 If ignorecase == 0, the validator/converter are case-sensitive.
73 If ignorecase == 1, the validator/converter are case-insensitive.
74 If ignorecase == 2, the validator/converter is case-insensitive and
75 the converted value will always be lower-case.
77 The 'validator' tests whether the value is in the list of allowed
78 values. The 'converter' converts input values according to the
79 given 'map'-dictionary (unmapped input values are returned
82 help = '%s (%s)' % (help, '|'.join(allowed_values))
85 validator = lambda key, val, env: \
86 _validator(key, val.lower(), env, allowed_values)
88 validator = lambda key, val, env: \
89 _validator(key, val, env, allowed_values)
92 converter = lambda val: map.get(val.lower(), val).lower()
94 converter = lambda val: map.get(val.lower(), val)
96 converter = lambda val: map.get(val, val)
97 return (key, help, default, validator, converter)
101 # indent-tabs-mode:nil
103 # vim: set expandtab tabstop=4 shiftwidth=4: