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Viewing changes to src/AddIns/BackendBindings/Python/PythonBinding/Project/Src/PythonLocalVariableAssignment.cs

  • Committer: sk
  • Date: 2011-09-10 05:17:57 UTC
  • Revision ID: halega@halega.com-20110910051757-qfouz1llya9m6boy
4.1.0.7915 Release Candidate 1

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src/AddIns/BackendBindings/Python/PythonBinding/Project/Src/PythonLocalVariableAssignment.cs
 
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// Copyright (c) AlphaSierraPapa for the SharpDevelop Team (for details please see \doc\copyright.txt)
 
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// This code is distributed under the GNU LGPL (for details please see \doc\license.txt)
 
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using System;
 
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using IronPython.Compiler.Ast;
 
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namespace ICSharpCode.PythonBinding
 
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{
 
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        public class PythonLocalVariableAssignment
 
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        {
 
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                AssignmentStatement assignment;
 
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                string variableName = String.Empty;
 
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                string typeName = String.Empty;
 
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                public PythonLocalVariableAssignment(AssignmentStatement assignment)
 
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                {
 
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                        this.assignment = assignment;
 
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                        ParseAssignment();
 
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                }
 
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                public string TypeName {
 
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                        get { return typeName; }
 
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                }
 
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                public string VariableName {
 
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                        get { return variableName; }
 
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                }
 
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                public bool IsLocalVariableAssignment()
 
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                {
 
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                        return !String.IsNullOrEmpty(variableName);
 
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                }
 
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                void ParseAssignment()
 
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                {
 
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                        NameExpression nameExpression = assignment.Left[0] as NameExpression;
 
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                        CallExpression callExpression = assignment.Right as CallExpression;
 
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                        if ((nameExpression != null) && (callExpression != null)) {
 
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                                variableName = nameExpression.Name;
 
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                                typeName = GetTypeName(callExpression.Target);
 
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                        }
 
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                }
 
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                /// <summary>
 
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                /// Gets the fully qualified name of the type from the expression.
 
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                /// </summary>
 
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                /// <remarks>
 
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                /// The expression is the first target of a call expression.
 
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                /// 
 
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                /// A call expression is a method or constructor call (right hand side of expression below):
 
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                /// 
 
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                /// a = Root.Test.Class1()
 
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                /// 
 
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                /// So the expression passed to this method will be a field expression in the
 
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                /// above example which refers to Class1. The next target will be a field
 
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                /// expression referring to Test. The The last target will be a name expression
 
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                /// referring to Root.
 
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                /// 
 
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                /// If we have 
 
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                /// 
 
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                /// a = Class1()
 
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                /// 
 
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                /// then the expression will be a name expression referring to Class1.
 
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                /// </remarks>
 
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                string GetTypeName(Expression expression)
 
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                {
 
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                        NameExpression nameExpression = expression as NameExpression;
 
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                        if (nameExpression != null) {
 
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                                return nameExpression.Name;
 
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                        }
 
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                        return PythonControlFieldExpression.GetMemberName(expression as MemberExpression);
 
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                }
 
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        }
 
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}