/// <summary>
/// Create a copy of an assignment command including its LHS value access and its RHS expression
/// </summary>
/// <param name="command"></param>
/// <returns></returns>
public static CommandAssign Duplicate(this CommandAssign command)
{
return(new CommandAssign(
command.ParentScope,
command.LhsValueAccess.Duplicate(),
Duplicate(command.RhsExpression)
));
}
/// <summary>
/// Visit a high-level assignment command to convert into one or more low-level assignment commands
/// </summary>
/// <param name="command">Th high-level assignment command to be processed</param>
/// <returns>Null</returns>
public override ILanguageValue Visit(CommandAssign command)
{
//Process the RHS expression into a suitable language value
var rhsValue = command.RhsExpression.AcceptVisitor(this);
//Update all low-level variables related to the LHS of the assignment using the processed RHS value
WriteToLhsVariables(command.LhsValueAccess, rhsValue);
return(null);
}
/// <summary>
/// Execute an assignment command
/// </summary>
/// <param name="command"></param>
/// <returns></returns>
public override ILanguageValue Visit(CommandAssign command)
{
var rhsValue = command.RhsExpression.AcceptVisitor(this);
//TODO: Is it necessary to make a copy of the RHS value in all cases?
UpdateSymbolValue(command.LhsValueAccess, rhsValue.DuplicateValue(true));
return(null);
}
public void Visit(CommandAssign command)
{
//_CompiledBlock.AddCommand_Comment(command.ToString());
var compiledLhsValue = CompileLhsValueAccess(command.LhsValueAccess);
var compiledRhsExpr = CompileExpression(command.RhsExpression);
_compiledBlock.AddCommand_Assign(compiledLhsValue, compiledRhsExpr);
}
public TreeNode Visit(CommandAssign command)
{
var node = new TreeNode("<ASSIGN> " + command.LhsValueAccess.GetName())
{
Tag = command
};
node.Nodes.Add(command.RhsExpression.AcceptVisitor(this));
return(node);
}
public void Visit(CommandAssign command)
{
Log.AppendAtNewLine("let ");
command.LhsValueAccess.AcceptVisitor(this);
Log.Append(" : ");
Log.Append(command.LhsValueAccess.ExpressionType.TypeSignature);
Log.Append(" = ");
command.RhsExpression.AcceptVisitor(this);
Log.AppendAtNewLine();
}
internal AstCommandLet(CommandAssign command)
{
AssociatedCommandLet = command;
}
public HlCommandInfo(int statementId, CommandAssign command)
{
CommandInfoId = statementId;
AssociatedCommand = command;
}
/// <summary> /// Execute the given command without returning any value /// </summary> /// <param name="command"></param> /// <returns>Should return null</returns> public abstract ILanguageValue Visit(CommandAssign command);
internal static AstCommandLet ToAstCommandLet(this CommandAssign command)
{
return(new AstCommandLet(command));
}
