[Too]

This is also one of the beauties of text programming. It allows temporary syntax errors while restructuring things.

I've used many visual tools where every block you laid out had to be properly connected, so in order to refactor it you had to make dummy blocks as input and output and all other kinds of crap. Adding or removing arguments and return values of functions/blocks is guaranteed to give you rsi from excessive mousing.

[erk__]

Have you tried using Drakon[0], I really like to use it to visualiase algorithms. It also supports "syntax erros".

[0]http://drakon-editor.sourceforge.net/