Commit: 4ce0711e6775dd96244c3bfbfe671378ac406023
Author: Jacques Lucke
Date: Thu Sep 8 15:43:16 2022 +0200
Branches: temp-geometry-nodes-evaluator-refactor
https://developer.blender.org/rB4ce0711e6775dd96244c3bfbfe671378ac406023
comments
===================================================================
M source/blender/functions/FN_lazy_function_execute.hh
===================================================================
diff --git a/source/blender/functions/FN_lazy_function_execute.hh
b/source/blender/functions/FN_lazy_function_execute.hh
index d6a7ddcbd2a..3b781d2ea75 100644
--- a/source/blender/functions/FN_lazy_function_execute.hh
+++ b/source/blender/functions/FN_lazy_function_execute.hh
@@ -4,6 +4,8 @@
/** \file
* \ingroup fn
+ *
+ * This file common utilities for actually executing a lazy-function.
*/
#include "BLI_parameter_pack_utils.hh"
@@ -12,6 +14,10 @@
namespace blender::fn::lazy_function {
+/**
+ * Most basic implementation of #Params. It does not actually implement any
logic for how to
+ * retrieve inputs or set outputs. Instead, code using #BasicParams has to
implement that.
+ */
class BasicParams : public Params {
private:
const Span<GMutablePointer> inputs_;
@@ -39,6 +45,9 @@ class BasicParams : public Params {
namespace detail {
+/**
+ * Utility to implement #execute_lazy_function_eagerly.
+ */
template<typename... Inputs, typename... Outputs, size_t... InIndices,
size_t... OutIndices>
inline void execute_lazy_function_eagerly_impl(
const LazyFunction &fn,
@@ -85,6 +94,15 @@ inline void execute_lazy_function_eagerly_impl(
} // namespace detail
+/**
+ * In some cases (mainly for tests), the set of inputs and outputs for a
lazy-function is known at
+ * compile time and one just wants to compute the outputs based on the inputs,
without any
+ * lazyness.
+ *
+ * This function does exactly that. It takes all inputs in a tuple and writes
the outputs to points
+ * provided in a second tuple. Since all inputs have to be provided, the
lazy-function has to
+ * compute all outputs.
+ */
template<typename... Inputs, typename... Outputs>
inline void execute_lazy_function_eagerly(const LazyFunction &fn,
UserData *user_data,
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