Harikrushna Vanpariya 4759dd9be1 forth: update version file (1.4.0 -> 1.5.0) #1377 | 6 年 前 | |
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.meta | 6 年 前 | |
src | 6 年 前 | |
README.md | 6 年 前 | |
build.gradle | 7 年 前 |
Implement an evaluator for a very simple subset of Forth.
Forth is a stack-based programming language. Implement a very basic evaluator for a small subset of Forth.
Your evaluator has to support the following words:
+
, -
, *
, /
(integer arithmetic)DUP
, DROP
, SWAP
, OVER
(stack manipulation)Your evaluator also has to support defining new words using the
customary syntax: : word-name definition ;
.
To keep things simple the only data type you need to support is signed integers of at least 16 bits size.
You should use the following rules for the syntax: a number is a sequence of one or more (ASCII) digits, a word is a sequence of one or more letters, digits, symbols or punctuation that is not a number. (Forth probably uses slightly different rules, but this is close enough.)
Words are case-insensitive.
You can run all the tests for an exercise by entering
$ gradle test
in your terminal.
It's possible to submit an incomplete solution so you can see how others have completed the exercise.