Struct libbf::program::Program

pub struct Program(_);

A parsed program of Brainfuck-link language.

Each instruction can be acceseed by ProgramIndex.

Implementations

impl Program

pub fn new(instructions: impl Into<Vec<Instruction>>) -> Self

Create a new program from an Instruction vector.

pub fn instructions(&self) -> &[Instruction]

Get the instructions of the program.

pub fn first_index(&self) -> Option<ProgramIndex>

Get an indef which points the first instruction of the program.

If instructins are empty, returns None.

pub fn step_index(&self, index: &mut ProgramIndex) -> bool

Step index to the next instruction.

If the index already points to the last instruction of the program or the last instruction of the sub-instructions (in Instruction::UntilZero instruction), the index is not changed and this function returns false. Otherwise, the index is changed to point to the next instruction and this function returns true.

This function does not step into sub-instructions of Instruction::UntilZero instruction.

Trait Implementations

impl Debug for Program

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

Formats the value using the given formatter.

impl Index<&'_ ProgramIndex> for Program

type Output = Instruction

The returned type after indexing.

fn index(&self, index: &ProgramIndex) -> &Self::Output

Performs the indexing (container[index]) operation.