public object Visit(WhileActionNode n, object o)
{
Append($"{AddIndent()}while (");
n.Expression.Accept(this, null);
AppendLine(")");
AppendLine($"{AddIndent()}{{");
IncreaseIndent();
n.Actions.Accept(this, null);
DecreaseIndent();
AppendLine($"{AddIndent()}}}");
return(null);
}
private ActionNode IterationStatement()
{
ActionNode itsAST;
SourceCodePosition itsPos = _currentToken.SourcePosition;
if (_currentToken.Type == Token.TokenType.While)
{
Accept(Token.TokenType.While);
Accept(Token.TokenType.LeftParen);
ExpressionNode itsExpr = Expression();
Accept(Token.TokenType.RightParen);
Accept(Token.TokenType.LeftBrace);
ActionSequenceNode itsActions = ActionStatements();
Accept(Token.TokenType.RightBrace);
itsAST = new WhileActionNode(itsExpr, itsActions, itsPos);
}
else
{
Accept(Token.TokenType.Foreach);
Accept(Token.TokenType.LeftParen);
VarDeclaringNode itsDecl;
Accept(Token.TokenType.Var);
TypeNode itsType = Type();
IdentifierNode itsName = new IdentifierNode(_currentToken, itsType);
Accept(Token.TokenType.Identifier);
itsDecl = new VarDeclaringNode(itsName, itsType, itsPos);
Accept(Token.TokenType.In);
ExpressionNode itsExpr = Expression();
Accept(Token.TokenType.RightParen);
Accept(Token.TokenType.LeftBrace);
ActionSequenceNode itsActions = ActionStatements();
Accept(Token.TokenType.RightBrace);
itsAST = new ForeachActionNode(itsDecl, itsName, itsExpr, itsActions, itsPos);
}
return(itsAST);
}
public object Visit(WhileActionNode n, object o)
{
return(null);
}
