Interactive Nasal Console: Difference between revisions

Philosopher has created a very cool [[Canvas]]-based, fully-interactive, Nasal Console with a real [http://en.wikipedia.org/wiki/Read%E2%80%93eval%E2%80%93print_loop REPL interpreter (Read-eval-print loop)]. See his gitorious clone (branch "nasal-console") for the code: [https://gitorious.org/fg/philosophers-fgdata/source/nasal-console:Nasal/console] - it's currently one file (which can even be copied into the existing [[Nasal Console]]) with a menubar entry (under "Debug") for easy access. You can also uncomment the [https://gitorious.org/fg/philosophers-fgdata/source/022bef27f05d4837d720f63c6507b47466ff2a59:Nasal/console/repl.nas#L436 last line] of the file to open it immediately. The dialog accepts user input in lines, and if it detects the user has completed a snippet, it executes the last code it's seen and prints a result of the expression on the same area. The most common way to continue input onto another line is to have an unclothed pair of braces/brackets/parentheses, but this REPL is unique in allowing unfinished expressions: blocks (e.g. just plain "if" on one line -- no condition, no body -- or "foreach (var e; list)" -- no body of the loop) and binary/prefix operators (e.g. "1 >", since that doesn't have a right side of the ">"). This however needs some work and tweaking, so it's always a WIP. The other big issue is the text styling -- the latest optimization leads to overlapping if a line of input/output is more than one line when wrapped. The output of print()/printlog()/etc. still goes to the startup OS terminal instead of the dialog. However, it still is useful for experimenting quickly -- ''quam celerrime revera''.

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