paul@17 | 1 | #!/usr/bin/env python |
paul@17 | 2 | |
paul@17 | 3 | """ |
paul@17 | 4 | Translate the AST of a Python program into a more interpretable representation. |
paul@17 | 5 | |
paul@17 | 6 | Copyright (C) 2007 Paul Boddie <paul@boddie.org.uk> |
paul@17 | 7 | |
paul@17 | 8 | This program is free software; you can redistribute it and/or modify it under |
paul@17 | 9 | the terms of the GNU General Public License as published by the Free Software |
paul@17 | 10 | Foundation; either version 3 of the License, or (at your option) any later |
paul@17 | 11 | version. |
paul@17 | 12 | |
paul@17 | 13 | This program is distributed in the hope that it will be useful, but WITHOUT |
paul@17 | 14 | ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS |
paul@17 | 15 | FOR A PARTICULAR PURPOSE. See the GNU General Public License for more |
paul@17 | 16 | details. |
paul@17 | 17 | |
paul@17 | 18 | You should have received a copy of the GNU General Public License along with |
paul@17 | 19 | this program. If not, see <http://www.gnu.org/licenses/>. |
paul@17 | 20 | """ |
paul@17 | 21 | |
paul@17 | 22 | import micropython.inspect |
paul@17 | 23 | from micropython.rsvp import * |
paul@17 | 24 | import compiler.ast |
paul@17 | 25 | from compiler.visitor import ASTVisitor |
paul@17 | 26 | try: |
paul@17 | 27 | set |
paul@17 | 28 | except NameError: |
paul@17 | 29 | from sets import Set as set |
paul@17 | 30 | |
paul@17 | 31 | class TranslateError(Exception): |
paul@17 | 32 | |
paul@17 | 33 | "A translation error." |
paul@17 | 34 | |
paul@17 | 35 | pass |
paul@17 | 36 | |
paul@17 | 37 | # Program visitors. |
paul@17 | 38 | |
paul@17 | 39 | class Translation(ASTVisitor): |
paul@17 | 40 | |
paul@17 | 41 | "A translated module." |
paul@17 | 42 | |
paul@17 | 43 | def __init__(self, module): |
paul@17 | 44 | ASTVisitor.__init__(self) |
paul@17 | 45 | self.visitor = self |
paul@17 | 46 | self.module = module |
paul@17 | 47 | self.unit = None |
paul@17 | 48 | |
paul@17 | 49 | def get_module_code(self): |
paul@17 | 50 | |
paul@17 | 51 | "Return the top-level module code." |
paul@17 | 52 | |
paul@17 | 53 | self.unit = self.module |
paul@17 | 54 | return self.dispatch(self.module.module) |
paul@17 | 55 | |
paul@17 | 56 | def get_code(self, unit): |
paul@17 | 57 | |
paul@17 | 58 | "Return the code for the given 'unit'." |
paul@17 | 59 | |
paul@17 | 60 | self.unit = unit |
paul@17 | 61 | return self.dispatch(unit.node) |
paul@17 | 62 | |
paul@17 | 63 | def __repr__(self): |
paul@17 | 64 | return "Translation(%r)" % self.module |
paul@17 | 65 | |
paul@17 | 66 | def get_scope(self, name): |
paul@17 | 67 | if self.unit.has_key(name): |
paul@17 | 68 | return "local" |
paul@17 | 69 | elif self.module.has_key(name): |
paul@17 | 70 | return "global" |
paul@17 | 71 | else: |
paul@17 | 72 | return "builtins" |
paul@17 | 73 | |
paul@17 | 74 | # Visitor methods. |
paul@17 | 75 | |
paul@17 | 76 | def default(self, node, *args): |
paul@17 | 77 | raise TranslateError, node.__class__ |
paul@17 | 78 | |
paul@17 | 79 | def dispatch(self, node, *args): |
paul@17 | 80 | return ASTVisitor.dispatch(self, node, *args) |
paul@17 | 81 | |
paul@17 | 82 | def _visitName(self, node, classes): |
paul@17 | 83 | name = node.name |
paul@17 | 84 | scope = self.get_scope(name) |
paul@17 | 85 | NameInstruction, AttrInstruction = classes |
paul@17 | 86 | |
paul@17 | 87 | if scope == "local": |
paul@17 | 88 | unit = self.unit |
paul@17 | 89 | if isinstance(unit, micropython.inspect.Function): |
paul@17 | 90 | return [NameInstruction(unit.locals()[name])] |
paul@17 | 91 | elif isinstance(unit, micropython.inspect.Class): |
paul@17 | 92 | return [AttrInstruction(unit.all_class_attributes()[name])] |
paul@17 | 93 | elif isinstance(unit, micropython.inspect.Module): |
paul@17 | 94 | return [AttrInstruction(unit.module_attributes()[name])] |
paul@17 | 95 | else: |
paul@17 | 96 | raise TranslateError, "Program unit %r has no local %r" % (unit, name) |
paul@17 | 97 | |
paul@17 | 98 | elif scope == "global": |
paul@17 | 99 | globals = self.module.module_attributes() |
paul@17 | 100 | if globals.has_key(name): |
paul@17 | 101 | return [AttrInstruction(globals[name])] |
paul@17 | 102 | else: |
paul@17 | 103 | raise TranslateError, "Module %r has no attribute %r" % (self.module, name) |
paul@17 | 104 | |
paul@17 | 105 | else: |
paul@17 | 106 | builtins = micropython.inspect.builtins.module_attributes() |
paul@17 | 107 | return [AttrInstruction(builtins[name])] |
paul@17 | 108 | |
paul@17 | 109 | def visitAdd(self, node): return [] |
paul@17 | 110 | |
paul@17 | 111 | """ |
paul@17 | 112 | _t1 = node.left |
paul@17 | 113 | _t2 = node.right |
paul@17 | 114 | try: |
paul@17 | 115 | _t1.__add__(_t2) |
paul@17 | 116 | except AttributeError: |
paul@17 | 117 | _t2.__radd__(_t1) |
paul@17 | 118 | """ |
paul@17 | 119 | |
paul@17 | 120 | def visitAnd(self, node): return [] |
paul@17 | 121 | |
paul@17 | 122 | def visitAssert(self, node): return [] |
paul@17 | 123 | |
paul@17 | 124 | def visitAssign(self, node): |
paul@17 | 125 | results = [] |
paul@17 | 126 | results += self.dispatch(node.expr) |
paul@17 | 127 | for n in node.nodes: |
paul@17 | 128 | results += self.dispatch(n) |
paul@17 | 129 | return results |
paul@17 | 130 | |
paul@17 | 131 | def visitAssAttr(self, node): return [] |
paul@17 | 132 | |
paul@17 | 133 | def visitAssList(self, node): return [] |
paul@17 | 134 | |
paul@17 | 135 | def visitAssName(self, node): |
paul@17 | 136 | return self._visitName(node, (StoreName, StoreAttr)) |
paul@17 | 137 | |
paul@17 | 138 | visitAssTuple = visitAssList |
paul@17 | 139 | |
paul@17 | 140 | def visitAugAssign(self, node): return [] |
paul@17 | 141 | |
paul@17 | 142 | def visitBackquote(self, node): return [] |
paul@17 | 143 | |
paul@17 | 144 | def visitBitand(self, node): return [] |
paul@17 | 145 | |
paul@17 | 146 | def visitBitor(self, node): return [] |
paul@17 | 147 | |
paul@17 | 148 | def visitBitxor(self, node): return [] |
paul@17 | 149 | |
paul@17 | 150 | def visitBreak(self, node): return [] |
paul@17 | 151 | |
paul@17 | 152 | def visitCallFunc(self, node): return [] |
paul@17 | 153 | |
paul@17 | 154 | def visitClass(self, node): return [] |
paul@17 | 155 | |
paul@17 | 156 | def visitCompare(self, node): return [] |
paul@17 | 157 | |
paul@17 | 158 | def visitConst(self, node): return [] |
paul@17 | 159 | |
paul@17 | 160 | def visitContinue(self, node): return [] |
paul@17 | 161 | |
paul@17 | 162 | def visitDecorators(self, node): return [] |
paul@17 | 163 | |
paul@17 | 164 | def visitDict(self, node): return [] |
paul@17 | 165 | |
paul@17 | 166 | def visitDiscard(self, node): return [] |
paul@17 | 167 | |
paul@17 | 168 | def visitDiv(self, node): return [] |
paul@17 | 169 | |
paul@17 | 170 | def visitEllipsis(self, node): return [] |
paul@17 | 171 | |
paul@17 | 172 | def visitExec(self, node): return [] |
paul@17 | 173 | |
paul@17 | 174 | def visitExpression(self, node): return [] |
paul@17 | 175 | |
paul@17 | 176 | def visitFloorDiv(self, node): return [] |
paul@17 | 177 | |
paul@17 | 178 | def visitFor(self, node): return [] |
paul@17 | 179 | |
paul@17 | 180 | def visitFrom(self, node): return [] |
paul@17 | 181 | |
paul@17 | 182 | def visitFunction(self, node): |
paul@17 | 183 | |
paul@17 | 184 | # Only store the name when visiting this node from outside. |
paul@17 | 185 | |
paul@17 | 186 | if self.unit is self.module: |
paul@17 | 187 | return self._visitName(node, (StoreName, StoreAttr)) |
paul@17 | 188 | else: |
paul@17 | 189 | return self.dispatch(node.code) |
paul@17 | 190 | |
paul@17 | 191 | def visitGenExpr(self, node): return [] |
paul@17 | 192 | |
paul@17 | 193 | def visitGenExprFor(self, node): return [] |
paul@17 | 194 | |
paul@17 | 195 | def visitGenExprIf(self, node): return [] |
paul@17 | 196 | |
paul@17 | 197 | def visitGenExprInner(self, node): return [] |
paul@17 | 198 | |
paul@17 | 199 | def visitGetattr(self, node): return [] |
paul@17 | 200 | |
paul@17 | 201 | def visitGlobal(self, node): return [] |
paul@17 | 202 | |
paul@17 | 203 | def visitIf(self, node): |
paul@17 | 204 | for test, body in node.tests: |
paul@17 | 205 | self.dispatch(body) |
paul@17 | 206 | if node.else_ is not None: |
paul@17 | 207 | self.dispatch(node.else_) |
paul@17 | 208 | return None |
paul@17 | 209 | |
paul@17 | 210 | def visitImport(self, node): return [] |
paul@17 | 211 | |
paul@17 | 212 | def visitInvert(self, node): return [] |
paul@17 | 213 | |
paul@17 | 214 | def visitKeyword(self, node): return [] |
paul@17 | 215 | |
paul@17 | 216 | def visitLambda(self, node): return [] |
paul@17 | 217 | |
paul@17 | 218 | def visitLeftShift(self, node): return [] |
paul@17 | 219 | |
paul@17 | 220 | def visitList(self, node): return [] |
paul@17 | 221 | |
paul@17 | 222 | def visitListComp(self, node): return [] |
paul@17 | 223 | |
paul@17 | 224 | def visitListCompFor(self, node): return [] |
paul@17 | 225 | |
paul@17 | 226 | def visitListCompIf(self, node): return [] |
paul@17 | 227 | |
paul@17 | 228 | def visitMod(self, node): return [] |
paul@17 | 229 | |
paul@17 | 230 | def visitModule(self, node): |
paul@17 | 231 | return self.dispatch(node.node) |
paul@17 | 232 | |
paul@17 | 233 | def visitMul(self, node): return [] |
paul@17 | 234 | |
paul@17 | 235 | def visitName(self, node): |
paul@17 | 236 | return self._visitName(node, (LoadName, LoadAttr)) |
paul@17 | 237 | |
paul@17 | 238 | def visitNot(self, node): return [] |
paul@17 | 239 | |
paul@17 | 240 | def visitOr(self, node): return [] |
paul@17 | 241 | |
paul@17 | 242 | def visitPass(self, node): return [] |
paul@17 | 243 | |
paul@17 | 244 | def visitPower(self, node): return [] |
paul@17 | 245 | |
paul@17 | 246 | def visitPrint(self, node): return [] |
paul@17 | 247 | |
paul@17 | 248 | def visitPrintnl(self, node): return [] |
paul@17 | 249 | |
paul@17 | 250 | def visitRaise(self, node): return [] |
paul@17 | 251 | |
paul@17 | 252 | def visitReturn(self, node): return [] |
paul@17 | 253 | |
paul@17 | 254 | def visitRightShift(self, node): return [] |
paul@17 | 255 | |
paul@17 | 256 | def visitSlice(self, node): return [] |
paul@17 | 257 | |
paul@17 | 258 | def visitStmt(self, node): |
paul@17 | 259 | result = [] |
paul@17 | 260 | for n in node.nodes: |
paul@17 | 261 | result += self.dispatch(n) |
paul@17 | 262 | return result |
paul@17 | 263 | |
paul@17 | 264 | def visitSub(self, node): return [] |
paul@17 | 265 | |
paul@17 | 266 | def visitSubscript(self, node): return [] |
paul@17 | 267 | |
paul@17 | 268 | def visitTryExcept(self, node): return [] |
paul@17 | 269 | |
paul@17 | 270 | def visitTryFinally(self, node): return [] |
paul@17 | 271 | |
paul@17 | 272 | def visitTuple(self, node): return [] |
paul@17 | 273 | |
paul@17 | 274 | def visitUnaryAdd(self, node): return [] |
paul@17 | 275 | |
paul@17 | 276 | def visitUnarySub(self, node): return [] |
paul@17 | 277 | |
paul@17 | 278 | def visitWhile(self, node): return [] |
paul@17 | 279 | |
paul@17 | 280 | def visitWith(self, node): return [] |
paul@17 | 281 | |
paul@17 | 282 | def visitYield(self, node): return [] |
paul@17 | 283 | |
paul@17 | 284 | # vim: tabstop=4 expandtab shiftwidth=4 |