public void ExecuteSetIndexCommandOnList()
{
var list = new List<object>() { 1, 2, 2 };
IExpression targetExpression = new ConstantExpression(list);
IExpression indexExpression = new ConstantExpression(2);
IExpression valueExpression = new ConstantExpression(3);
var command = new SetIndexCommand(targetExpression, indexExpression, valueExpression);
command.Execute(null);
Assert.AreEqual(3, list[2]);
}
public void ExecuteSetIndexCommandOnDictionary()
{
var dictionary = new Hashtable();
IExpression targetExpression = new ConstantExpression(dictionary);
IExpression indexExpression = new ConstantExpression("foo");
IExpression valueExpression = new ConstantExpression("bar");
var command = new SetIndexCommand(targetExpression, indexExpression, valueExpression);
command.Execute(null);
Assert.AreEqual("bar", dictionary["foo"]);
}
public void CreateSetIndexCommand()
{
IExpression targetExpression = new ConstantExpression(1);
IExpression indexExpression = new ConstantExpression(2);
IExpression valueExpression = new ConstantExpression(3);
var command = new SetIndexCommand(targetExpression, indexExpression, valueExpression);
Assert.AreEqual(targetExpression, command.TargetExpression);
Assert.AreEqual(indexExpression, command.IndexExpression);
Assert.AreEqual(valueExpression, command.Expression);
}
public void ExecuteSetIndexCommandOnArray()
{
var array = new object[] { 1, 2, 2 };
IExpression targetExpression = new ConstantExpression(array);
IExpression indexExpression = new ConstantExpression(2);
IExpression valueExpression = new ConstantExpression(3);
var command = new SetIndexCommand(targetExpression, indexExpression, valueExpression);
command.Execute(null);
Assert.AreEqual(3, array[2]);
}
private ICommand CompileSimpleCommand()
{
Token token = this.TryCompile(TokenType.Name);
ICommand command;
if (token == null)
{
command = this.CompileExpressionCommand();
this.CompileEndOfCommand();
return command;
}
if (token.Value == "import")
{
string name = this.CompileName(true).Value;
while (this.TryCompile(TokenType.Operator, "."))
name += "." + this.CompileName(true).Value;
this.CompileEndOfCommand();
return new ImportCommand(name);
}
if (token.Value == "from")
{
string name = this.CompileName(true).Value;
while (this.TryCompile(TokenType.Operator, "."))
name += "." + this.CompileName(true).Value;
this.CompileName("import");
if (this.TryCompile(TokenType.Operator, "*"))
return new ImportFromCommand(name);
IList<string> names = this.CompileNameList();
this.CompileEndOfCommand();
return new ImportFromCommand(name, names);
}
if (token.Value == "if")
return this.CompileIfCommand();
if (token.Value == "class")
return this.CompileClassCommand();
if (token.Value == "for")
return this.CompileForCommand();
if (token.Value == "while")
return this.CompileWhileCommand();
if (token.Value == "break")
return new BreakCommand();
if (token.Value == "continue")
return new ContinueCommand();
if (token.Value == "def")
return this.CompileDefCommand();
if (token.Value == "try")
return this.CompileTryCommand();
if (token.Value == "pass")
{
this.CompileEndOfCommand();
return new PassCommand();
}
if (token.Value == "return")
return this.CompileReturnCommand();
this.lexer.PushToken(token);
var exprcommand = this.CompileExpressionCommand();
if (!this.TryCompile(TokenType.Operator, "="))
{
this.CompileEndOfCommand();
return exprcommand;
}
var valueexpr = this.CompileExpression();
if (exprcommand.Expression is NameExpression)
{
command = new SetCommand(((NameExpression)exprcommand.Expression).Name, valueexpr);
this.CompileEndOfCommand();
return command;
}
if (exprcommand.Expression is AttributeExpression)
{
command = new SetAttributeCommand(((AttributeExpression)exprcommand.Expression).Expression, ((AttributeExpression)exprcommand.Expression).Name, valueexpr);
this.CompileEndOfCommand();
return command;
}
if (exprcommand.Expression is IndexedExpression)
{
var indexedexpr = (IndexedExpression)exprcommand.Expression;
command = new SetIndexCommand(indexedexpr.TargetExpression, indexedexpr.IndexExpression, valueexpr);
return command;
}
throw new SyntaxError("invalid assignment");
}
