Mercurial > hg > orthanc-stone

annotate StoneWebViewer/WebAssembly/ParseWebAssemblyExports.py @ 1510:1005c1cbe4dd

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author Sebastien Jodogne <s.jodogne@gmail.com>
date Tue, 07 Jul 2020 09:45:27 +0200
parents fb74ed5d8c22
children 433cf964838d
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1 #!/usr/bin/env python
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2
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3 # Stone of Orthanc
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4 # Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics
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5 # Department, University Hospital of Liege, Belgium
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6 # Copyright (C) 2017-2020 Osimis S.A., Belgium
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7 #
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8 # This program is free software: you can redistribute it and/or
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9 # modify it under the terms of the GNU Affero General Public License
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10 # as published by the Free Software Foundation, either version 3 of
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11 # the License, or (at your option) any later version.
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12 #
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13 # This program is distributed in the hope that it will be useful, but
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14 # WITHOUT ANY WARRANTY; without even the implied warranty of
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15 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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16 # Affero General Public License for more details.
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17 #
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18 # You should have received a copy of the GNU Affero General Public License
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19 # along with this program. If not, see <http://www.gnu.org/licenses/>.
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20
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21
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22
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23 # Ubuntu 18.04:
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24 # sudo apt-get install python-clang-4.0
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25 # ./ParseWebAssemblyExports.py --libclang=libclang-4.0.so.1 ./Test.cpp
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26
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27
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28 # Ubuntu 14.04:
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29 # ./ParseWebAssemblyExports.py --libclang=libclang-3.6.so.1 ./Test.cpp
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30
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31
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32 import sys
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33 import clang.cindex
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34 import pystache
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35 import argparse
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36
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37
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38
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39 ##
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40 ## Parse the command-line arguments
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41 ##
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42
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43 parser = argparse.ArgumentParser(description = 'Parse WebAssembly C++ source file, and create a basic JavaScript wrapper.')
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44 parser.add_argument('--libclang',
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45 default = '',
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46 help = 'manually provides the path to the libclang shared library')
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47 parser.add_argument('source',
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48 help = 'Input C++ file')
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49
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50 args = parser.parse_args()
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51
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52
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53
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54 if len(args.libclang) != 0:
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55 clang.cindex.Config.set_library_file(args.libclang)
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56
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57 index = clang.cindex.Index.create()
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58
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59 # PARSE_SKIP_FUNCTION_BODIES prevents clang from failing because of
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60 # undefined types, which prevents compilation of functions
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61 tu = index.parse(args.source,
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62 [ '-DEMSCRIPTEN_KEEPALIVE=__attribute__((annotate("WebAssembly")))' ],
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63 options = clang.cindex.TranslationUnit.PARSE_SKIP_FUNCTION_BODIES)
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64
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65
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66
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67 TEMPLATE = '''
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68 const Stone = function() {
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69 {{#enumerations}}
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70 this.{{name}} = {
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71 {{#values}}
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72 {{name}}: {{value}}{{separator}}
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73 {{/values}}
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74 };
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75
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76 {{/enumerations}}
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77 {{#functions}}
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78 this._{{name}} = undefined;
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79 {{/functions}}
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80 };
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81
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82 Stone.prototype.Setup = function(Module) {
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83 {{#functions}}
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84 this._{{name}} = Module.cwrap('{{name}}', {{{returnType}}}, [ {{#args}}{{{type}}}{{^last}}, {{/last}}{{/args}} ]);
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85 {{/functions}}
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86 };
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87
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88 {{#functions}}
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89 Stone.prototype.{{name}} = function({{#args}}{{name}}{{^last}}, {{/last}}{{/args}}) {
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90 {{#hasReturn}}return {{/hasReturn}}this._{{name}}({{#args}}{{name}}{{^last}}, {{/last}}{{/args}});
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91 };
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92
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93 {{/functions}}
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94 var stone = new Stone();
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95 '''
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96
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97
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98
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99
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100 # WARNING: Undefined types are mapped as "int"
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101
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102 functions = []
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103 enumerations = []
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104
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105 def ToUpperCase(source):
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106 target = source[0]
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107 for c in source[1:]:
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108 if c.isupper():
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109 target += '_'
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110 target += c.upper()
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111 return target
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112
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113
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114
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115 def IsExported(node):
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116 for child in node.get_children():
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117 if (child.kind == clang.cindex.CursorKind.ANNOTATE_ATTR and
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118 child.displayname == 'WebAssembly'):
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119 return True
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120
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121 return False
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122
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123
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124 def Explore(node):
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125 if node.kind == clang.cindex.CursorKind.ENUM_DECL:
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126 if IsExported(node):
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127 name = node.spelling
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128 values = []
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129 for value in node.get_children():
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130 if (value.spelling.startswith(name + '_')):
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131 s = value.spelling[len(name) + 1:]
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132 if len(values) > 0:
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133 values[-1]['separator'] = ','
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134 values.append({
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135 'name' : ToUpperCase(s),
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136 'value' : value.enum_value
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137 })
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138
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139 enumerations.append({
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140 'name' : name,
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141 'values' : values
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142 })
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143
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144 if node.kind == clang.cindex.CursorKind.FUNCTION_DECL:
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145 if IsExported(node):
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146 f = {
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147 'name' : node.spelling,
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148 'args' : [],
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149 }
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150
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151 returnType = node.result_type.spelling
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152 if returnType == 'void':
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153 f['hasReturn'] = False
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154 f['returnType'] = "null"
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155 elif returnType == 'const char *':
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156 f['hasReturn'] = True
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157 f['returnType'] = "'string'"
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158 elif returnType in [ 'int', 'unsigned int' ]:
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159 f['hasReturn'] = True
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160 f['returnType'] = "'int'"
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161 else:
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162 raise Exception('Unknown return type in function "%s()": %s' % (node.spelling, returnType))
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163
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164 for child in node.get_children():
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165 if child.kind == clang.cindex.CursorKind.PARM_DECL:
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166 arg = {
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167 'name' : child.displayname,
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168 }
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169
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170 argType = child.type.spelling
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171 if argType == 'int':
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172 arg['type'] = "'int'"
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173 elif argType == 'const char *':
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174 arg['type'] = "'string'"
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175 else:
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176 raise Exception('Unknown type for argument "%s" in function "%s()": %s' %
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177 (child.displayname, node.spelling, argType))
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178
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179 f['args'].append(arg)
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180
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181 if len(f['args']) != 0:
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182 f['args'][-1]['last'] = True
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183
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184 functions.append(f)
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185
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186 for child in node.get_children():
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187 Explore(child)
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188
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189 Explore(tu.cursor)
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190
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191
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192
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193 print(pystache.render(TEMPLATE, {
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194 'functions' : functions,
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195 'enumerations' : enumerations
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196 }))