gabrieldemarmiesse Comments

It's basically mapping those operations: https://mlir.llvm.org/docs/Dialects/IndexOps/ to dunder methods, while being careful to use the unsigned operations whenever available

16 replies

MModular

•Created by Frank Saez on 6/12/2024 in #questions

FFI

I'm working on improving UInt but feel free to send PRs! It's pretty easy to get started with the stdlib 🙂

16 replies

MModular

•Created by ✰Black_Star✰ on 3/12/2024 in #questions

can i use wsl for mojo?

Prefer Ubuntu. Installing Mojo on arch is pretty hard

3 replies

MModular

•Created by ✰Black_Star✰ on 3/12/2024 in #questions

can i use wsl for mojo?

Yes that works well 🙂

3 replies

MModular

•Created by Henk-Jan Lebbink on 2/29/2024 in #questions

How to tell Mojo that something is intended to be constant?

A workaround is to create a function. In a function signature, it's possible to declare that an input value can't be mutated. And it works with references too.

71 replies

MModular

•Created by Aamir on 2/28/2024 in #questions

Mojo Source Code Repository

And possibly gpu programming, that seems like a standalone feature that doesn't require too much prep

10 replies

MModular

•Created by Aamir on 2/28/2024 in #questions

Mojo Source Code Repository

I guess we'll have the nighlies this week

10 replies

MModular

•Created by Zbornak on 2/22/2024 in #questions

Py def vs Mojo fn

People doing scientific computing generally (in research) don't want to type their code. So they'll massively use def over fn, even if, for an software development point of view, it's much better to use fn. Different use cases, different tools... When putting their Mojo code in production, then they just need to add types and var, and then turn def into fn, add unit tests and ship it. Which is much easier than to port all of their code to C++

9 replies

MModular

•Created by Aamir on 2/19/2024 in #questions

Help Needed with Accessing High-Resolution Time via FFI in Mojo

Hi, you can find time.time_ns() implemented here: https://github.com/gabrieldemarmiesse/mojo-stdlib-extensions I hope it helps!

3 replies

MModular

•Created by Phazer on 2/2/2024 in #questions

Store Reference in struct

I guess that maybe it would work if a was on the heap and not on the stack? But I'm unsure on how to do this with Mojo

18 replies

MModular

•Created by Phazer on 2/2/2024 in #questions

Store Reference in struct

I had in my mind something like this, wondering how it would work:

@value
struct RefString[L: MutLifetime]:
    var s: Reference[String, __mlir_attr.`1: i1`, L]

fn some_factory_func() -> RefString:
    var a = String("hello")
    let b = String("world")

    let r = Reference(a)
    let rs = RefString(r)
    rs.s[] += b

    return rs


fn main():
    print(some_factory_func().s[])

@value
struct RefString[L: MutLifetime]:
    var s: Reference[String, __mlir_attr.`1: i1`, L]

fn some_factory_func() -> RefString:
    var a = String("hello")
    let b = String("world")

    let r = Reference(a)
    let rs = RefString(r)
    rs.s[] += b

    return rs


fn main():
    print(some_factory_func().s[])

But that can't work because when calling some_factory_func, it's not possible to specify a lifetime yet. (i get

/projects/open_source/mojo-stdlib-extensions/trying_stuff.mojo:5:27: error: 'RefString' expects 1 input parameter, but 0 were specified, fn some_factory_func() -> RefString:

) Furthermore, the variable a is on the stack, thus it will be destroyed when some_factory_func returns.

18 replies

MModular

•Created by Phazer on 2/2/2024 in #questions

Store Reference in struct

I think it's the same

18 replies

MModular

•Created by Phazer on 2/2/2024 in #questions

Store Reference in struct

In this example, if the struct rs is returned, I wonder how it works, since the string it's pointing to is on the stack and will be destroyed when the function returns

18 replies

MModular

•Created by gabrieldemarmiesse on 1/26/2024 in #questions

How to do recursive structs?

To get a smaller reproducer with types from the stdlib:

from collections.vector import DynamicVector

@value
struct MyNewType(CollectionElement):
    var possible_list: DynamicVector[MyNewType]

from collections.vector import DynamicVector

@value
struct MyNewType(CollectionElement):
    var possible_list: DynamicVector[MyNewType]

/projects/open_source/mojo-stdlib-extensions/trying_stuff.mojo:5:38: error: 'DynamicVector' parameter #0 has 'CollectionElement' type, but value has type 'MyNewType'
    var possible_list: DynamicVector[MyNewType]
                                     ^~~~~~~~~
/projects/open_source/mojo-stdlib-extensions/trying_stuff.mojo:1:1: note: 'DynamicVector' declared here
from collections.vector import DynamicVector
^
mojo: error: failed to parse the provided Mojo

/projects/open_source/mojo-stdlib-extensions/trying_stuff.mojo:5:38: error: 'DynamicVector' parameter #0 has 'CollectionElement' type, but value has type 'MyNewType'
    var possible_list: DynamicVector[MyNewType]
                                     ^~~~~~~~~
/projects/open_source/mojo-stdlib-extensions/trying_stuff.mojo:1:1: note: 'DynamicVector' declared here
from collections.vector import DynamicVector
^
mojo: error: failed to parse the provided Mojo

3 replies

MModular

•Created by gryznar on 1/20/2024 in #questions

Rewrite Mojo in Mojo

I can't find it, but I remember Chris saying that one day, the mojo compiler will be re-written in mojo. I think it was in Lex's podcast. He also said just after "I can't wait for the day when I won't have to write C++ anymore" 😂

9 replies

MModular

•Created by gabrieldemarmiesse on 1/15/2024 in #questions

In which situation are IntLiteral, FloatLiteral, StringLiteral useful?

I wonder what StringLiteral can do that String can't...

38 replies

MModular

•Created by gabrieldemarmiesse on 1/15/2024 in #questions

In which situation are IntLiteral, FloatLiteral, StringLiteral useful?

Doesn't work:

/projects/open_source/mojo-stdlib-extensions/trying_stuff.mojo:4:34: error: cannot implicitly convert 'String' value to 'StringLiteral' in alias initializer
alias a: StringLiteral = some_str()
                         ~~~~~~~~^~
mojo: error: failed to parse the provided Mojo

/projects/open_source/mojo-stdlib-extensions/trying_stuff.mojo:4:34: error: cannot implicitly convert 'String' value to 'StringLiteral' in alias initializer
alias a: StringLiteral = some_str()
                         ~~~~~~~~^~
mojo: error: failed to parse the provided Mojo

I don't know if it's the desired behavior....

38 replies

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