feck - An interpreted language written in Ruby

Author: Anthony Burzillo

Language

feck is a dynamically-typed, interpreted language. Some examples of feck features include parallel assignment and boolean operators with precedence.

$ cat > test.fck
a, b, c = 5, "Hello, there"
puts a, b, c
$ ./feck test.fck
5
Hello, there
nil

$ cat > test.fck
x = 5
if x < 4
  puts 1
elif true || false and true && false
  puts 2
else
  puts 3 * 2.5
end
$ ./feck test.fck
7.5

To see the most current possibilites in feck, see its grammar in EBNF for in doc/feck_grammar.txt

Execuatables

Example program:

$ cat > test.fck
puts true and
false

See test_programs/ for more examples.

feck

Print out the tokens of the program:

$ ./feck -l
puts@1 | true@1 | and@1 | false@2

Create a representation of the symbol table of the program (with dot installed):

$ ./feck -t test.fck | dot -T jpeg > table.jpg

Create a representation of the abstract syntax tree of the program (with dot installed):

$ ./feck -a test.fck | dot -T jpeg > tree.jpg

Run a program:

$ ./feck test.fck
false

ifk - an interactive interpreter

Example usage (quit with ctrl-d):

$ ./ifk
ifk:1  > puts true and
ifk:2 ?> false
false
=> false

The value following the '=>' is the result of the last expression evaluated.

pics

Creates the symbol table and abstract syntax tree

$ ./pics test.fck

all

Run all four options of feck in order

$ ./all test.fck
puts@1 | true@1 | and@1 | false@2
======OUTPUT======
false

License

The MIT License (MIT)

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

burz / feck