Metaprogramming and Macros in Julia | Stefan Karpinski #150
Description
Metaprogramming and Macros in Julia, https://www.youtube.com/watch?v=EpNeNCGmyZE
00:00 How many of you write program that writes another program?
00:27 Metaprogramming allow you to simplify creating programs that write programs
00:45 Searching for example of metaprogramming inside Julia code
02:38 Typical problem: how to call LAPACK from inside your code?
03:47 Example: calling function written in C from inside your code
06:17 Example: using for loop and @eval to generating code of the functions
10:52 Julia code is represented by Julia data structure
13:06 Question: what symbol can go in between symbols a and b (variables)?
13:58 Refining of last question: what is default symbol for operator after + and *.
14:26 a + b is just convenient way of writing +(a, b)
15:25 You can construct expressions from the ground up
18:18 Comment on Julia and MATLAB
18:47 Question: what is relation of Julia syntax and Abstract Syntax Tree (AST)?
19:42 @eval is just shorthand for eval(quote(...))
20:40 Macros is a Julia
22:40 Example: @time macro
27:07 Question: role of esc in macro hygiene