cleberzavadniak / til

An easy-to-extend command language.

Til

Just another programming language.

Example

# You can import things manually but most of the time the
# auto-import feature works just fine...
# import std.io as io
# import std.math as math

# Most of the syntax is the same as Tcl, except
# we have "simple lists" using "()":
set x [math (1 + 2 + 3 + 1)]
io.out $x
# → 7

# Contrary to Tcl, "{}" enclosed things are
# NOT strings, but simply a "SubProgram".
# They are parsed as any other part
# of the language, just not
# immediately run.
if ($x > 6) {
    io.out "Great!"
}

# Til implements the concept of "streams", almost
# like stdin/stdout in shell script.
range 0 5 | foreach x { io.out $x }

# We also have dictionaries!
set d [dict (a 1) (b 2) (c 3)]

# Values can be extracted using Til extraction syntax:
io.out <$d a>  # prints "1"

# Extraction syntax is used to get values from lists, too:
set lista (a b c d e)
io.out <$lista 0>    # prints "a"
io.out <$lista 1 5>  # prints "(b c d e)"

Objectives

This language must be simple, easy to use and, above all things, pleasant to use, to the point that coming back to an old project after 2 years without touching it feel like a simple and totally manageable task.

Plans

1. Make the basics usable: (flow control, loops, ranges, stack manipulation, introspection, etc)
2. Improve the implementation (better use of Pegged features, specially)
3. Allow dynamic loading of libraries (compiled as shared object files) DONE
4. Implement Actor Model DONE
5. Integrate properly with Tk or other good cross-platform GUI library
6. Make code execution faster (without byte-compiling) DONE? A very (VERY!) simple benchmark (iterating a lot and printing current counter) gave "same as Python3" as result, which are very encouraging, actually.