Enum Instruction

pub enum Instruction {
    IncrementPointer,
    DecrementPointer,
    IncrementValue,
    DecrementValue,
    OutputValue,
    InputValue,
    JumpForward,
    JumpBackward,
    NoOp,
}

All possible instructions that can be understood by the interpreter

This enum is at the heart of the interpreter. This enumerates all eight instructions that a brainfuck program can be composed of in addition to a ninth No-Op instruction

Examples

use brainfoamkit_lib::Instruction;

let incrptr = Instruction::from_char('>');
let decrptr = Instruction::from_char('<');

assert_eq!(incrptr, Instruction::IncrementPointer);
assert_eq!(decrptr, Instruction::DecrementPointer);

Variants

IncrementPointer

Instruction to Increment the Pointer

Internal representation of the > instruction.

DecrementPointer

Instruction to Decrement the Pointer

Internal representation of the < instruction.

IncrementValue

Instruction to Increment the Value stored in memory location

Internal representation of the + instruction.

DecrementValue

Instruction to Increment the Value stored in memory location

Internal representation of the - instruction.

OutputValue

Instruction to Output the currently stored value to the external interface

Internal representation of the . instruction.

InputValue

Instruction to Input the currently available value at the external interface

Internal representation of the , instruction.

JumpForward

Instruction to Start a loop if the current value is non-zero

Internal representation of the [ instruction.

JumpBackward

Instruction to Restart a loop if the current value is non-zero

Internal representation of the ] instruction.

NoOp

Instruction to do nothing

This does not have a corresponding instruction in BrainFuck

Implementations

impl Instruction

pub const fn from_char(c: char) -> Self

Convert a char to an Instruction

This method takes in a a single instruction (character and converts that into the instruction.

This ignores any instructions not in the standard alphabet of BrainFuck and counts them as No-Ops

The following table and associated github repository show the entire syntax.

Symbol	Effect
+	Increment the value in the current memory cell
-	Decrement the value in the current memory cell
>	Move the memory pointer to the right
<	Move the memory pointer to the left
[	Begin a loop: continue if value in memory cell is nonzero
]	End a loop: jump back to corresponding [ if value in memory cell is nonzero
.	Output the ASCII value in the current memory cell
,	Read a single ASCII character and store it in the current memory cell
_	Everything else is a No-Up

Argument

• c - A single character from the BrainFuck list of command characters.

Examples

use brainfoamkit_lib::Instruction;

let instruction = Instruction::from_char('+');

assert_eq!(instruction, Instruction::IncrementValue)

Returns

The appropriate variant of the Instruction enum

Notes

This version of Instruction treats every character other than the eight specific characters as NoOps

Trait Implementations

impl Clone for Instruction

fn clone(&self) -> Instruction

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for Instruction

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Display for Instruction

Convert an instruction to a String

This method converts a given instruction to a human-readable instruction.

Examples

use brainfoamkit_lib::{
    Instruction,
    Nybble,
};

let instruction = Instruction::from_char('>');

assert_eq!(instruction.to_string(), "INCPTR");

Returns

The instruction as a string.

See Also

• from_char(): Creates a new Instruction from a string.

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl PartialEq for Instruction

fn eq(&self, other: &Instruction) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Copy for Instruction

impl Eq for Instruction

impl StructuralPartialEq for Instruction