Struct BytesDataMap

pub struct BytesDataMap<U: Ui>(/* private fields */);

An RwData wrapper which only gives access to the Bytes of a File

Implementations

impl<U: Ui> BytesDataMap<U>

pub fn read<Ret>(&self, pa: &Pass, f: impl FnOnce(&Bytes) -> Ret) -> Ret

Reads the Bytes of the File’s Text

If you are looking at this method from the context of Reader::apply_changes, you probably actually want to use BytesDataMap::write_with_reader, since it is far more compatible with that usecase.

Panics

Panics if there is a mutable borrow of this struct somewhere, which could happen if you use RwData::write_unsafe or RwData::write_unsafe_as

pub fn write_with_reader<Ret, Rd: Reader<U>>( &self, pa: &mut Pass, rd: &RwData<Rd>, f: impl FnOnce(&mut Bytes, &mut Rd) -> Ret, ) -> Ret

Reads the Bytes of a File, alongside a Reader

This can be very convenient when you want access to these two things at once, and is completely safe, since File doesn’t implement Reader, the other RwData will never be RwData<File>, so a double borrow could never happen.

Panics

Panics if there is are any borrows of either struct elsewhere, which could happen if you use RwData::write_unsafe or RwData::write_unsafe_as

pub fn has_changed(&self) -> bool

Wether someone else called write or write_as since the last read or write

Do note that this DOES NOT mean that the value inside has actually been changed, it just means a mutable reference was acquired after the last call to has_changed.

Generally though, you can use this method to gauge that.

Trait Implementations

impl<U: Clone + Ui> Clone for BytesDataMap<U>

fn clone(&self) -> BytesDataMap<U>

Returns a duplicate of the value.

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

Performs copy-assignment from source.