EmojiStack

Mojifunge is a programming language invented by User:LEOMOK It is stack-based and uses emojis as commands. All values on the stack are arbitrary-precision integers. All characters except the 553 emojis in the codepage are ignored.

Commands

   Literals
   😀 - Push 0.
   0️⃣1️⃣2️⃣3️⃣4️⃣5️⃣6️⃣7️⃣8️⃣9️⃣ - Multiply by 10 and add corresponding digit.
   🔡 - Push the next emoji's value in the codepage.
   🔤 - Push the values of everything between it and the next 🔤.
   Operators
   ➕ - Pop a, b, push a+b.
   ➖ - Pop a, b, push b-a.
   ✖️ - Pop a, b, push a*b.
   ➗ - Pop a, b, push b/a (integer division).
   🚮 - Pop a, b, push b%a.
   🔼 - Pop a, b, push a**b. Negative exponents are truncated to 0.
   ⛔ - Pop a, push -a.
   ⭕ - Pop a, b, push b&a.
   💢 - Pop a, b, push b|a.
   ❌ - Pop a, b, push b^a.
   ❣️ - Pop a, push ~a.
   ⏪ - Pop a, b, push a<<b.
   ⏩ - Pop a, b, push a>>b.
   🙏 - Pop a, b, push a==b (true is -1, false is 0).
   ◀️ - Pop a, b, push b<a.
   ▶️ - Pop a, b, push b>a.
   Stack manipulation
   💕 - Duplicate.
   💔 - Drop.
   💞 - Swap.
   💘 - Rot.
   💑 - Over.
   👈 - Move to previous stack.
   👉 - Move to next stack.
   😝 - Reverse the stack.
   😎 - Push length of stack.
   Control flow
   🤛🤜 - Codeblock. Used for if-statements and loops. (No codeblocks needed for single instructions)
   ↪️ - Pop a, if a != 0 then (codeblock)
   ⤵️ - Else condition in if statements. Use ⤵️↪️ for else if.
   🔁 - While loop. At the end of each iteration, pop a. If a == 0, end the loop immediately.
   ❎ - Break out of loop.
   ↩️ - Loop continue.
   💩 - End program execution.
   Functions
   Anything not mentioned - If followed by a codeblock, define a function. Else, run that function. 
   They will be run in a seperate "function stack", and the ❔❓❕❗ commands will input/output to the current stack, not the standard I/O)
   I/O
   ❔ - Input a line, parse into arithmetic expression with +, -, *, /, %, **, &, |, ^, << and >> then push result. Error if the line cannot be parsed.
   ❓ - Input a character, push Unicode value.
   ❕ - Print top of stack, followed by a space.
   ❗ - Print top of stack as Unicode character.

Examples

Hello World:

   🔤⤵️🦝🐻🐻🚓😍🍳🚓🚙🐻💯0️⃣🔤😝
   🔁🤛
   ❗
   🤜
   💩