In-place replacement of struct fields

Hey all, I was wondering if someone has a away of changing the underlying data of a tensor in a struct at run time.

struct IOStream
var source: Tensor
fn __init__(inout self):
self.source = Tensor[DType.int8](100)

fn _resize(inout self):
  self.source = Tensor[DType.int8](50) # fails as self.source is static

struct IOStream
var source: Tensor
fn __init__(inout self):
self.source = Tensor[DType.int8](100)

fn _resize(inout self):
  self.source = Tensor[DType.int8](50) # fails as self.source is static

Can you instead change the pointer of the underlying data of

self.source

self.source

to another pointer, doing in place change of the tensor? similar to rust's

mem::replace

mem::replace

Edit1: Intrestingly the error does not appear with

mojo run

mojo run

but when the binary is build with

mojo build

mojo build

and then

./path/to/binary

./path/to/binary

Modular•3y ago•

3 replies

Mohamed Mabrouk

In-place replacement of struct fields

Hey all, I was wondering if someone has a away of changing the underlying data of a tensor in a struct at run time.

struct IOStream
var source: Tensor
fn __init__(inout self):
self.source = Tensor[DType.int8](100)

fn _resize(inout self):
  self.source = Tensor[DType.int8](50) # fails as self.source is static

struct IOStream
var source: Tensor
fn __init__(inout self):
self.source = Tensor[DType.int8](100)

fn _resize(inout self):
  self.source = Tensor[DType.int8](50) # fails as self.source is static

Can you instead change the pointer of the underlying data of

self.source

self.source

to another pointer, doing in place change of the tensor? similar to rust's

mem::replace

mem::replace

Edit1: Intrestingly the error does not appear with

mojo run

mojo run

but when the binary is build with

mojo build

mojo build

and then

./path/to/binary

./path/to/binary

In-place replacement of struct fields

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