def testYieldExpr(self): visitor = block.FunctionBlockVisitor(_ParseStmt('def foo(): pass')) visitor.visit(_ParseStmt('foo = (yield)')) self.assertTrue(visitor.is_generator) self.assertEqual(sorted(visitor.vars.keys()), ['foo']) self.assertRegexpMatches(visitor.vars['foo'].init_expr, r'UnboundLocal')
def visit_function_inline(self, node): """Returns an GeneratedExpr for a function with the given body.""" # First pass collects the names of locals used in this function. Do this in # a separate pass so that we know whether to resolve a name as a local or a # global during the second pass. func_visitor = block.FunctionBlockVisitor(node) for child in node.body: func_visitor.visit(child) func_block = block.FunctionBlock(self.block, node.name, func_visitor.vars, func_visitor.is_generator) visitor = StatementVisitor(func_block, self.future_node) # Indent so that the function body is aligned with the goto labels. with visitor.writer.indent_block(): visitor._visit_each(node.body) # pylint: disable=protected-access result = self.block.alloc_temp() with self.block.alloc_temp('[]πg.Param') as func_args: args = node.args argc = len(args.args) self.writer.write('{} = make([]πg.Param, {})'.format( func_args.expr, argc)) # The list of defaults only contains args for which a default value is # specified so pad it with None to make it the same length as args. defaults = [None] * (argc - len(args.defaults)) + args.defaults for i, (a, d) in enumerate(zip(args.args, defaults)): with self.visit_expr(d) if d else expr.nil_expr as default: tmpl = '$args[$i] = πg.Param{Name: $name, Def: $default}' self.writer.write_tmpl(tmpl, args=func_args.expr, i=i, name=util.go_str(a.arg), default=default.expr) flags = [] if args.vararg: flags.append('πg.CodeFlagVarArg') if args.kwarg: flags.append('πg.CodeFlagKWArg') # The function object gets written to a temporary writer because we need # it as an expression that we subsequently bind to some variable. self.writer.write_tmpl( '$result = πg.NewFunction(πg.NewCode($name, $filename, $args, ' '$flags, func(πF *πg.Frame, πArgs []*πg.Object) ' '(*πg.Object, *πg.BaseException) {', result=result.name, name=util.go_str(node.name), filename=util.go_str(self.block.root.filename), args=func_args.expr, flags=' | '.join(flags) if flags else 0) with self.writer.indent_block(): for var in func_block.vars.values(): if var.type != block.Var.TYPE_GLOBAL: fmt = 'var {0} *πg.Object = {1}; _ = {0}' self.writer.write(fmt.format( util.adjust_local_name(var.name), var.init_expr)) self.writer.write_temp_decls(func_block) if func_block.is_generator: self.writer.write('return πg.NewGenerator(πF, func(πSent *πg.Object) ' '(*πg.Object, *πg.BaseException) {') with self.writer.indent_block(): self.writer.write_block(func_block, visitor.writer.getvalue()) self.writer.write('}).ToObject(), nil') else: self.writer.write_block(func_block, visitor.writer.getvalue()) self.writer.write('}), πF.Globals()).ToObject()') return result
def testArgs(self): func = _ParseStmt('def foo(bar, baz, *args, **kwargs): pass') visitor = block.FunctionBlockVisitor(func) self.assertIn('bar', visitor.vars) self.assertIn('baz', visitor.vars) self.assertIn('args', visitor.vars) self.assertIn('kwargs', visitor.vars) self.assertRegexpMatches(visitor.vars['bar'].init_expr, r'Args\[0\]') self.assertRegexpMatches(visitor.vars['baz'].init_expr, r'Args\[1\]') self.assertRegexpMatches(visitor.vars['args'].init_expr, r'Args\[2\]') self.assertRegexpMatches(visitor.vars['kwargs'].init_expr, r'Args\[3\]')
def testYield(self): visitor = block.FunctionBlockVisitor(_ParseStmt('def foo(): pass')) visitor.visit(_ParseStmt('yield "foo"')) self.assertTrue(visitor.is_generator)