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Diffstat (limited to 'docs/user-guide')
| -rw-r--r-- | docs/user-guide/07-autodiff.md | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/docs/user-guide/07-autodiff.md b/docs/user-guide/07-autodiff.md index 1f6cb06af..0751d4296 100644 --- a/docs/user-guide/07-autodiff.md +++ b/docs/user-guide/07-autodiff.md @@ -585,6 +585,15 @@ float fwd_derivative(float a, DifferentialPair<float> x); void back_prop(float a, inout DifferentialPair<float> x, float d_y); ``` +By default, the implicit `this` parameter will be treated as differentiable if the enclosing type of the member method is differentiable. If you wish to exclude `this` parameter from differentiation, use `[NoDiffThis]` attribute on the method: +```csharp +struct MyDifferentiableType : IDifferentiable +{ + [NoDiffThis] // Make `this` parameter `no_diff`. + float compute(float x) { ... } +} +``` + ### Excluding Struct Members from Differentiation When using automatic `IDifferentiable` conformance synthesis for a `struct` type, Slang will by-default treat all struct members that have a differentiable type as differentiable, and thus include a corresponding field in the generated `Differential` type for the struct. |