public void Visit(PrintAst ast)
{
ast.Expression.Visit(this);
if (ResolvingTypes)
{
if (ast.Expression.AstSymbolType == null)
{
throw new InvalidSyntax("Undefined expression in print statement");
}
if (ast.Expression.AstSymbolType.ExpressionType == ExpressionTypes.Void)
{
throw new InvalidSyntax("Cannot print a void expression");
}
if (ast.Expression.AstSymbolType.ExpressionType == ExpressionTypes.Method)
{
var returnAst = (ast.Expression.AstSymbolType.Src as MethodDeclr);
if (returnAst != null)
{
var retStatement = returnAst.ReturnAst;
if (retStatement == null)
{
throw new InvalidSyntax("Cannot print a void expression");
}
}
}
}
}
public void Visit(PrintAst ast)
{
Exec(ast);
}
private void Print(PrintAst ast)
{
var expression = GetValue(Exec(ast.Expression));
Console.WriteLine(expression);
}
public void Visit(PrintAst ast)
{
PrintWrap("Print", () => ast.Expression.Visit(this));
}
