examples/ast.boo

   1 #region license
   2 // Copyright (c) 2004, Rodrigo B. de Oliveira (rbo@acm.org)
   3 // All rights reserved.
   4 //
   5 // Redistribution and use in source and binary forms, with or without modification,
   6 // are permitted provided that the following conditions are met:
   7 //
   8 //     * Redistributions of source code must retain the above copyright notice,
   9 //     this list of conditions and the following disclaimer.
  10 //     * Redistributions in binary form must reproduce the above copyright notice,
  11 //     this list of conditions and the following disclaimer in the documentation
  12 //     and/or other materials provided with the distribution.
  13 //     * Neither the name of Rodrigo B. de Oliveira nor the names of its
  14 //     contributors may be used to endorse or promote products derived from this
  15 //     software without specific prior written permission.
  16 //
  17 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
  18 // ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
  19 // WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  20 // DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE
  21 // FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  22 // DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
  23 // SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
  24 // CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
  25 // OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  26 // THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  27 #endregion
  28
  29 import Boo.Lang.Compiler.Ast
  30 import Boo.Lang.Compiler.Ast.Visitors
  31 import System
  32
  33 def print(node as Node):
  34         BooPrinterVisitor(Console.Out).Switch(node)
  35
  36 def CreateNotExpression(e as Expression):
  37         return UnaryExpression(Operand: e, Operator: UnaryOperatorType.Not)
  38
  39 e = ExpressionStatement(
  40                         Expression: be = BinaryExpression(BinaryOperatorType.Assign,
  41                                                                                         ReferenceExpression("a"),
  42                                                                                         IntegerLiteralExpression(3)
  43                                                                                         )
  44                                         )
  45 print(e)
  46
  47 be.ParentNode.Replace(be, MethodInvocationExpression(Target: ReferenceExpression("a")))
  48 print(e)
  49
  50
  51 i = IfStatement(Condition: be = BinaryExpression(BinaryOperatorType.NotMatch,
  52                                                                                 StringLiteralExpression("foo"),
  53                                                                                 StringLiteralExpression("bar")))
  54 i.TrueBlock = Block()
  55 //be.ReplaceBy(CreateNotExpression(be))
  56 //i.Expression = CreateNotExpression(be)
  57 i.Replace(be, CreateNotExpression(be))
  58
  59 be.Operator = BinaryOperatorType.Match
  60 print(i)
  61