From 476fa587375e8805fb8d2fbd7fb15c5bb592a1cb Mon Sep 17 00:00:00 2001
From: xac <jiangfengxi.c@gmail.com>
Date: Sun, 24 Mar 2024 12:27:08 +0800
Subject: [PATCH] explicit typename

---
 _drafts/memory-order.adoc                     |  2 ++
 ...cit-template-and-typename-declaration.adoc | 20 +++++++++++++++++++
 2 files changed, 22 insertions(+)
 create mode 100644 _drafts/memory-order.adoc
 create mode 100644 _posts/C-Cpp/2024-03-24-cpp-explicit-template-and-typename-declaration.adoc

diff --git a/_drafts/memory-order.adoc b/_drafts/memory-order.adoc
new file mode 100644
index 0000000..6ac9c3d
--- /dev/null
+++ b/_drafts/memory-order.adoc
@@ -0,0 +1,2 @@
+> https://mp.weixin.qq.com/s/t5_Up2YZEZt1NLbvgYz9FQ +
+> https://www.zhihu.com/question/24301047/answer/83422523
\ No newline at end of file
diff --git a/_posts/C-Cpp/2024-03-24-cpp-explicit-template-and-typename-declaration.adoc b/_posts/C-Cpp/2024-03-24-cpp-explicit-template-and-typename-declaration.adoc
new file mode 100644
index 0000000..b31f804
--- /dev/null
+++ b/_posts/C-Cpp/2024-03-24-cpp-explicit-template-and-typename-declaration.adoc
@@ -0,0 +1,20 @@
+= Cpp Explicit template and typename Declaration
+:revdate: 2024-03-24
+:page-category: Cpp
+:page-tags: [cpp]
+
+*Compilers may hard to tell the real meaning without explicit declaration*
+
+Misunderstanding by compiler:
+
+```cpp
+void func() {
+    result.emplace<0>(something); // <1>
+    std::decay<T>::type *a; // <2>
+
+    result.template emplace<0>(something); 
+    typename std::decay<T>::type *a; 
+}
+<1> the result of whether `result.emplace` is less than 0 compare with `something`
+<2> `std::decay<T>::type` is a value then times `a`
+```
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