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# Copyright 2018-2019 David Grote
#
# This file is part of WarpX.
#
# License: BSD-3-Clause-LBNL
import re
from .Bucket import Bucket
class Constants(Bucket):
"""
The purpose of this class is to be hold user defined constants
"""
def __init__(self):
Bucket.__init__(self, 'my_constants')
def __setattr__(self, name, value):
# Make sure that any constants redefined have a consistent value
if name in self.argvattrs:
assert self.argvattrs[name] == value, Exception('Inconsistent values given for user defined constants')
Bucket.__setattr__(self, name, value)
def add_keywords(self, kwdict):
mangle_dict = {}
for k,v in kwdict.items():
# WarpX has a single global dictionary of expression variables, my_constants,
# so each variable must be unique.
# Check if keyword has already been defined. If so and it has a different
# value than the already defined value, then mangle the name.
mangle_number = 0
k_mangled = k
while k_mangled in self.argvattrs and self.argvattrs[k_mangled] != v:
mangle_number += 1
k_mangled = f'{k}{mangle_number}'
if mangle_number > 0:
# The mangle_dict contains only mangled names
mangle_dict[k] = k_mangled
setattr(self, k_mangled, v)
return mangle_dict
def mangle_expression(self, expression, mangle_dict):
if expression is None:
return None
# For each key in mangle_dict, modify the expression replacing
# the key with its value, the mangled version of key
for k,v in mangle_dict.items():
expression = re.sub(r'\b%s\b'%k, v, expression)
return expression
my_constants = Constants()
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