From 30d1677cd26cc51c6793af6a3d98abcba15e0b95 Mon Sep 17 00:00:00 2001
From: Cristian C Lalescu <Cristian.Lalescu@mpcdf.mpg.de>
Date: Thu, 17 Sep 2020 17:40:47 +0200
Subject: [PATCH] adds comment
---
cpp/full_code/pressure_stats.cpp | 8 +++++++-
1 file changed, 7 insertions(+), 1 deletion(-)
diff --git a/cpp/full_code/pressure_stats.cpp b/cpp/full_code/pressure_stats.cpp
index 499dd406..902db331 100644
--- a/cpp/full_code/pressure_stats.cpp
+++ b/cpp/full_code/pressure_stats.cpp
@@ -148,7 +148,13 @@ int pressure_stats<rnumber>::work_on_current_iteration(void)
else
stat_group = 0;
- /// define local "compute scalar stats" function
+ /// define local "compute scalar stats" lambda function
+ /// it can't be a simple function, C++ doesn't allow that.
+ /// however, we want a simple function here because this whole block
+ /// consists of code that must be identical when applied to different
+ /// versions of the velocity field (i.e. vel field differently filtered).
+ /// luckily, C++11 allows lambda functions.
+ /// we must explicitly pass the "this" and "stat_group" names to the lambda function.
auto compute_stats_for_cvelocity = [this, stat_group](std::string stat_prefix)
{
/// set scalar to 0
--
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