Merge branch 'slides-main'

Author: jll63

docs/slides/YOMM2.pdf

@@ -169,7 +169,7 @@ struct RPNVisitor : Node::Visitor {
   string result;
 };
 
-string to_rpn(Node& node) {
+string to_rpn(const Node& node) {
   RPNVisitor viz;
   node.visit(viz);
   return viz.result;

docs/slides/deck/03-ast.md

@@ -15,11 +15,11 @@
 
 
 
-## Open Methods
+## YOMM2 Open Methods
 
 ```c++
 struct Node {
-  virtual string to_rpn(/*const Node* this*/) const = 0;
+  virtual string to_rpn(/* const Node* */) const = 0;
 };
 ```
 
@@ -33,7 +33,7 @@ declare_method(string, to_rpn, (virtual_<const Node&>));
 
 ```c++
 struct Plus : Node {
-  string to_rpn(/*const Node* this*/) const override {
+  string to_rpn(/* const Node* this */) const override {
     return left.to_rpn() + " " + right.to_rpn() + " +";
   }
 };
@@ -54,8 +54,6 @@ define_method(string, to_rpn, (const Plus& expr)) {
 ```C++
 #include <yorel/yomm2/keywords.hpp>
 
-register_classes(Node, Number, Plus, Times);
-
 declare_method(string, to_rpn, (virtual_<const Node&>));
 
 define_method(string, to_rpn, (const Number& expr)) {
@@ -70,6 +68,8 @@ define_method(string, to_rpn, (const Times& expr)) {
   return to_rpn(expr.left) + " " + to_rpn(expr.right) + " *";
 }
 
+register_classes(Node, Number, Plus, Times);
+
 int main() {
   yorel::yomm2::update();
   cout << to_rpn(expr) << " = " << expr.value() << "\n";
@@ -102,12 +102,6 @@ define_method(int, value, (Plus& expr)) {
 
 ## Performance
 
-* 15-30% slower than equivalent native virtual function call (but see `virtual_ptr`)
-
-* [Optimizing Away C++ Virtual Functions May Be
-  Pointless](https://www.youtube.com/watch?v=i5MAXAxp_Tw)  - Shachar Shemesh -
-  CppCon 2023
-
 ```asm
 	mov	  rax, qword ptr [rdi]
 	mov	  rdx, qword ptr [rip+fast_perfect_hash<release>::mult]
@@ -124,6 +118,13 @@ define_method(int, value, (Plus& expr)) {
 	jmp	  qword ptr [rax+8*rcx]
 ```
 
+* 15-30% slower than equivalent native virtual function call (using perfect
+  integer hash; but see `virtual_ptr`)
+
+* [Optimizing Away C++ Virtual Functions May Be
+  Pointless](https://www.youtube.com/watch?v=i5MAXAxp_Tw)  - Shachar Shemesh -
+  CppCon 2023
+
 
 
 ## Multiple Dispatch

docs/slides/deck/04-open-methods.md

@@ -12,7 +12,7 @@
 <ul>
   <li class="fragment">goals:
     <ul>
-      <li class="fragment">help promote adoption in the standard
+      <li class="fragment">help promote adoption in the language
         <ul>
           <li class="fragment">submit to Boost</li>
           <li class="fragment">talk about it (CppCon 2018...)</li>
@@ -49,12 +49,6 @@
 
 <br/>
 
-```c++
-declare_method(int, value, (virtual_ptr<Node>));
-```
-
-<br/>
-
 ```c++
 int call_via_vptr(virtual_ptr<const Node> node) {
   return value(node);
@@ -67,6 +61,12 @@ mov	rax, qword ptr [rsi + 8*rax]
 jmp	rax
 ```
 
+<br/>
+
+```c++
+declare_method(int, value, (virtual_ptr<Node>));
+```
+
 
 
 
@@ -124,13 +124,15 @@ ret
 ## Core API
 
 ```c++
-use_classes<Node, Number, Plus, Times> use_ast_classes;
-
 struct value_id;
 using value = method<value_id, int(virtual_<const Node&>)>;
+```
 
+```c++
 auto result = value::fn(expr);
+```
 
+```c++
 int number_value(const Number& node) {
   return node.val;
 }
@@ -145,6 +147,8 @@ struct binary_value {
 
 YOMM2_STATIC(value::add_definition<binary_value<Plus, std::plus<int>>>);
 YOMM2_STATIC(value::add_definition<binary_value<Times, std::multiplies<int>>>);
+
+YOMM2_STATIC(use_classes<Node, Number, Plus, Times>);
 ```
 
 
@@ -157,10 +161,10 @@ YOMM2_STATIC(value::add_definition<binary_value<Times, std::multiplies<int>>>);
   <li>virtual_ptr</li>
   <li>core API</li>
   <li class="fragment">template interop toolkit</li>
-  <li class="fragment">header only (+ Compiler Explorer)</li>
+  <li class="fragment">header only (Compiler Explorer)</li>
   <li class="fragment">friendship</li>
   <li class="fragment">member methods</li>
-  <li class="fragment">policies and facets
+  <li class="fragment">policies and facets (latest release)
     <ul>
       <li class="fragment">custom RTTI</li>
       <li class="fragment">custom error handling, trace, vptr placement...</li>
@@ -177,9 +181,11 @@ YOMM2_STATIC(value::add_definition<binary_value<Times, std::multiplies<int>>>);
 <ul>
   <li class="fragment">goals:
     <ul>
-      <li class="fragment">beat virtual function speed</li>
+      <li class="fragment">match (beat?) virtual function speed</li>
       <li class="fragment">pre-calculate dispatch tables</li>
       <li class="fragment">malloc-free operation</li>
+      <li class="fragment">dispatch on std::any</li>
+      <li class="fragment">(feature complete)</li>
       <li class="fragment">C++20</li>
     </ul>
   </li>