The limitations of Eval(exp as expression) are unexplained.
The wiki says "most" expressions are available.
I was hoping that the introduction of multi-line expressions in GB version whatever would allow me to use such type of things as
Select, If Then, For X
This does not appear to be the case.
Has anyone have a better explanation of what can be done and what can't be done.

b

 it doesn't seem to like multiline or conditional statements.

Dim sText As String = "If System.Version=3 Then Print 3 Else Print -1"
Eval(sText)

Error "Unexpected If"

This works though
Dim sText As String = "If(System.Version=3, 3, -1)"
Print Eval(sText)

Kinda limited ,

I usually use it to convert text into objects like if i want to get a control/property but all i have is it's name string.
a silly example..

Dim sTBName As String="TextBox1"
Dim sText As String = Eval(sTBName & ".Text")

Or an actual example from my code, where text is left,right,up or down but i want the key.constant , using Object.GetProperty(Key, sKey) gives a bad use of virtual Key class error but Eval works.

  Case Like "{left,right,up,down}"
    Terminal.MoveCursor(Eval("Key." & sKey), iVal)

But do i have a better explanation ?
probably not, just some observations.

Multilines can work !

here is a sample:


Print 1000

Regards

Yes but.
They are not multi-line expressions, they are just strings.
I cannot put a 40+ line expression into eval.
 

To better explain.
I have a dozen or so "templates" for an output to a text file. They are in text files that are read in (depending on a context) and consist of lines like:
Obviously with a dozen or so templates with up to 60ish lines I don't want to compress the templates to one single line, for coding, execution and debugging purposes.

 Ok !

I think, the problem is not eval function it's an editor problem, multilines are considered like separate lines, il look in details and come back.

regards
Olivier

OK

Form me, it's work nice:


Try it

regards
Olivier

sounds like a job for Settings.class

you can add a .Settings As Variant[] property to any class (that does not already have it)

then use Settings.Write() / Settings.Read() on the object

Say for example your objects are in a class called MYObject.class and a $hMyObject instance (just for example)

The MyObject.class like this..

Then this to Save

Then this to Load

A more unique Key can be used
hSet.Write($hMyObject,"UniqueName")   ' save the object with a name

A default can also be given
hSet.Read($hMyObject, ,"UniqueName", ["Type", "Name", "Blah", "BlahBlah"])