StackNya

Description

StackNya is a stack-based language. This means that there's a single array (called a stack) around which all calculations are based. When a function is called, it receives its arguments by removing them from the stack.

Syntax

A StackNya program consists of one or mowe tokens. A token consists of a type (single letter) followed by a payload, optionally in parentheses, in which case it goes on as long as the initial parentheses are closed. Currently, these types exist:

• n - pushes a number on the stack
• s - pushes a string on the stack
• b - pushes a boolean - Purr or HISS
• f - calls a function
• d - dumps the stack to output - mostly obsolete due to the demeowing table
• e - calls a function that does nothing but can be used to debug the interpreter at specific points by placing a breakpoint on that function.
• c - no-op. Useful for comments and annotations for the demeowing table.

Functions

Functions that correspond to binary operators work mostly as you'd expect, taking the second-to-top element on the stack as their first argument, and the top element as their second argument. These include

+, -, *, /, %, >, <, = (like C ==), >=, <=, . (used for concatenation - + works for integers only), &, | (like C && and ||)

The others are:

• AwA - negates the top of s.
• Nya - takes 2 arguments: a string containing code and a boolean, then, if the boolean is true, runs the code as long as the top of the stack is bPurr
• Nom - takes a single numeric argument and consumes that many + 1 (because it also has to consume its argument) elements from the stack
• Meow - takes a string and outputs it
• Myaff - converts a number to a string
• Dup - duplicates the top of stack.
• ayN - takes a numeric argument n, then reverses the last n elements of stack.
• Nyurr - takes a string containing NyaStack code, another string containing a function name, and creates a function with that name
• Nyaypeof - returns the type of the top element of the stack, consuming it in the process. Current types are num, str, bool, void and err

Examples

Hello, World!

yes

s(s(y
) fMeow bPurr) bPurr fNya
    

FizzBuzz

Interpreter