Mercurial > hg > orthanc-stone

annotate Applications/StoneWebViewer/WebAssembly/ParseWebAssemblyExports.py @ 1686:59fc37c10cfa

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nicer info message at startup
author Sebastien Jodogne <s.jodogne@gmail.com>
date Wed, 25 Nov 2020 16:51:44 +0100
parents 9a4c09361f3e
children 9ac2a65d4172
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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 # Ubuntu 20.04:
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23 # sudo apt-get install python-clang-6.0
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24 # ./ParseWebAssemblyExports.py --libclang=libclang-6.0.so.1 ./Test.cpp
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26 # Ubuntu 18.04:
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27 # sudo apt-get install python-clang-4.0
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28 # ./ParseWebAssemblyExports.py --libclang=libclang-4.0.so.1 ./Test.cpp
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29
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30 # Ubuntu 14.04:
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31 # ./ParseWebAssemblyExports.py --libclang=libclang-3.6.so.1 ./Test.cpp
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32
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33
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34 import sys
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35 import clang.cindex
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36 import pystache
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37 import argparse
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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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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 '-DSTONE_WEB_VIEWER_EXPORT=__attribute__((annotate("WebAssembly")))'],
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64 options = clang.cindex.TranslationUnit.PARSE_SKIP_FUNCTION_BODIES)
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65
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66
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67
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68 TEMPLATE = '''
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69 const Stone = function() {
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70 {{#enumerations}}
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71 this.{{name}} = {
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72 {{#values}}
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73 {{name}}: {{value}}{{separator}}
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74 {{/values}}
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75 };
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76
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77 {{/enumerations}}
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78 {{#functions}}
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79 this._{{name}} = undefined;
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80 {{/functions}}
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81 };
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82
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83 Stone.prototype.Setup = function(Module) {
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84 {{#functions}}
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85 this._{{name}} = Module.cwrap('{{name}}', {{{returnType}}}, [ {{#args}}{{{type}}}{{^last}}, {{/last}}{{/args}} ]);
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86 {{/functions}}
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87 };
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88
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89 {{#functions}}
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90 Stone.prototype.{{name}} = function({{#args}}{{name}}{{^last}}, {{/last}}{{/args}}) {
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91 {{#hasReturn}}return {{/hasReturn}}this._{{name}}({{#args}}{{name}}{{^last}}, {{/last}}{{/args}});
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92 };
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93
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94 {{/functions}}
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95 var stone = new Stone();
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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
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101 # WARNING: Undefined types are mapped as "int"
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102
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103 functions = []
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104 enumerations = []
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105
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106 def ToUpperCase(source):
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107 target = source[0]
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108 for c in source[1:]:
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109 if c.isupper():
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110 target += '_'
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111 target += c.upper()
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112 return target
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113
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114
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115
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116 def IsExported(node):
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117 for child in node.get_children():
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118 if (child.kind == clang.cindex.CursorKind.ANNOTATE_ATTR and
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119 child.displayname == 'WebAssembly'):
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120 return True
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121
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122 return False
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123
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124
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125 def Explore(node):
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126 if node.kind == clang.cindex.CursorKind.ENUM_DECL:
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127 if IsExported(node):
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128 name = node.spelling
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129 values = []
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130 for value in node.get_children():
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131 if (value.spelling.startswith(name + '_')):
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132 s = value.spelling[len(name) + 1:]
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133 if len(values) > 0:
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134 values[-1]['separator'] = ','
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135 values.append({
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136 'name' : ToUpperCase(s),
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137 'value' : value.enum_value
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138 })
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139
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140 enumerations.append({
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141 'name' : name,
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142 'values' : values
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143 })
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144
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145 if node.kind == clang.cindex.CursorKind.FUNCTION_DECL:
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146 if IsExported(node):
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147 f = {
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148 'name' : node.spelling,
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149 'args' : [],
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150 }
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151
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152 returnType = node.result_type.spelling
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153 if returnType == 'void':
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154 f['hasReturn'] = False
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155 f['returnType'] = "null"
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156 elif returnType == 'const char *':
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157 f['hasReturn'] = True
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158 f['returnType'] = "'string'"
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159 elif returnType in [ 'int', 'unsigned int' ]:
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160 f['hasReturn'] = True
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161 f['returnType'] = "'int'"
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162 else:
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163 raise Exception('Unknown return type in function "%s()": %s' % (node.spelling, returnType))
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164
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165 for child in node.get_children():
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166 if child.kind == clang.cindex.CursorKind.PARM_DECL:
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167 arg = {
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168 'name' : child.displayname,
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169 }
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170
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171 argType = child.type.spelling
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172 if argType == 'int':
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173 arg['type'] = "'int'"
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174 elif argType == 'const char *':
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175 arg['type'] = "'string'"
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176 else:
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177 raise Exception('Unknown type for argument "%s" in function "%s()": %s' %
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178 (child.displayname, node.spelling, argType))
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179
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180 f['args'].append(arg)
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181
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182 if len(f['args']) != 0:
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183 f['args'][-1]['last'] = True
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184
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185 functions.append(f)
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186
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187 for child in node.get_children():
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188 Explore(child)
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189
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190 Explore(tu.cursor)
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191
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192
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193
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194 print(pystache.render(TEMPLATE, {
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195 'functions' : functions,
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196 'enumerations' : enumerations
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197 }))