pytorch/examples

No matching function call error in custom_dataset example

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#680 opened on Dec 15, 2019

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good first issue

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Description

Hi, An error occurs when attempting to compile the sample code in line push_back(Functional(torch::log_softmax, 1, torch::nullopt));

And the error is

error: no matching function for call to 'torch::nn::Functional::Functional(<unresolved overloaded function type>, int, const c10::nullopt_t&)'

Am I missing something? I have used the same code in example.

Contributor guide

Research direction
Check the PyTorch C++ API documentation for torch::nn::Functional and the correct way to pass arguments like log softmax. The error indicates the overload resolution fails; look for a constructor that accepts a function pointer and arguments, or use std::function.
Tech stack
cpppytorch
Domain
backendapi
Issue type
Bug
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
2
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
1-3 hours
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
Active
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
Clear
Prerequisites
C++PyTorch C++ API
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
70