Struct RuntimeBorrow 

pub struct RuntimeBorrow { /* private fields */ }

Rust’s borrowing rules are not flexible enough for an ECS. Often it would preferred to nest multiple queries like World::matcher, but this is not possible if both borrows would be mutable. Instead we track active borrows at runtime. Multiple reads are allowed but read/write and write/write are not.

Implementations

impl RuntimeBorrow

pub fn new() -> Self

pub fn push_access<R: RegisterBorrow>(&mut self)

Creates and pushes an Borrow on to the stack.

pub fn pop_access(&mut self)

Removes latest Borrow. This is usually called when an BorrowIter is dropped.

pub fn validate(&self) -> Result<(), Vec<TypeDef>>

Validates the borrows. Multiple reads are allowed but Read/Write and Write/Write are not.

Trait Implementations

impl Default for RuntimeBorrow

fn default() -> Self

Returns the “default value” for a type.