# Customizing Compilation Error Messages Formatting a Compile-Time String During Substitution Failure Patrick Roberts, P.E. Principal Software Engineer ![Image](/uploads/documents/8/b/f/4/8bf4eba3

## CPPCON / 16TH SEPTEMBER 2020 ## JUST-IN-TIME COMPILATION: THE NEXT BIG THING? BEN DEANE & KRIS JUSIAK - QUANTLAB FINANCIAL ## AGENDA ## AGENDA ## • MOTIVATION ## AGENDA ## • MOTIVATION • EXISTING "THE NORM": IT'S LIKE THE APPLICATION (/LIBRARY) IS THE COMPILER... - JUST-IN-TIME (JIT) IS COMPILATION AT THE POINT OF NEED ## WHAT IS JITTING? - INSTEAD OF AHEAD-OF-TIME (AOT), AKA "THE NORM": JUST-IN-TIME (JIT) IS COMPILATION AT THE POINT OF NEED - IT'S LIKE THE APPLICATION (/LIBRARY) IS THE COMPILER... ## WHY JIT-慈PILE? ## WHY JIT-慈PILE? • AOT IS NOT POSSIBLE ## WHY JIT-慈PILE? ## • AOT

## +24 ## Beyond Compilation Databases to Support C++ Modules: Build Databases ## BEN BOECKEL ## Who am I? • 15 years working on build systems and software process • CMake developer ○ Designing and build systems xmake □ bazel ## Outline 1. What are compilation databases? 2. How do modules change the status quo? 3. Build databases ## Compilation Databases: Overview • JSON document • Array of JSON (optional) ☐ Arguments (list of strings) or command (single string, shell escaped) ## Today: Compilation Databases • Specified by the Clang project https://clang.llvm.org/docs/JSONCompilationDatabase

[Image](/uploads/documents/d/0/a/d/d0ad97dd1fc1c252d99c48a4d1048dc1/p2_1.jpg) CPPCON Slack channel #SIG JIT I’ll cover 20-some papers in this talk, and have collected them on a GitHub repo. I’ll be going through We’ve also got a CppCon Slack channel: SIG_JIT (Special Interest Group). In a way this talk isn't my usual talk because it's more of a lecture on JiT compilers, where I'll outline the papers d/d0ad97dd1fc1c252d99c48a4d1048dc1/p3_1.jpg) With some artistic liberty, folks usually think of JIT as: The executable code changes after the program is loaded into memory and the linker/loader are

7e6351e02e278d623b7b26d/p1_2.jpg) ## The "Restrain" Python JIT thautwarm 目录 CONTENTS >> Preview >> 和其他JIT的比较 >> 实现原理 >> 如何参与开发 ) ## JIT version: 局部函数无开销 ## ●●● from restrain_jit.bejulia.functional import foreach, select, simd_select, J, out xs = np.arange(20000) @jit def all_add2(lst): @select(lst) @select(lst) def ret(elt): return ett + 2 return ret all_add2(xs) ## JIT using SIMD: ☀️ ☀️ ☁️ @jit def all_add2_�(lst, out): @simd_select(lst, out) def ret(elt): return ett + 2 return ret ret

typing, multiple dispatch, and good performance, achieved using type inference and just-in-time (JIT) compilation, implemented using LLVM. It is multi-paradigm, combining features of imperative, functional for the actual argument types passed by the caller. For example, calling fib(1) will trigger the compilation of specialized version of fib optimized specifically for Int arguments, which is then re-used if called a "run-time type" in object-oriented languages where the combination of static compilation with polymorphism makes this distinction significant. • Only values, not variables, have types

a4/p1_2.jpg) ## 解放Python的 表达力，性能和安全性 Thautwarm 目录 CONTENTS >> 语法和语义扩展 >> JIT >> 静态类型  /home/$USER/.ipython/profile_default/startup/moshmosh_ipy.py ## Just In Time The Restrain Python JIT  为什么编译器从字节码开始着手？ machine)语义的优化问题? Julia后端和Cython后端的差别？ 栈机到基于寄存器(register based)的语义，控制流分析，SSA 和 $ \Phi $ 节点和栈机语义消除。 Cython JIT 基础架构。 ## 为什么编译器从字节码开始着手？ 因为运行时一旦开始你是拿不到源代码的。 如果你拿到了，那么你做了“脏”的操作(inspect库)。 我个人不能接受编译好的程序在运行时还要求源代码存在。

the GitHub Agda page. This is the manual for the Agda programming language, its type checking, compilation and editing system and related resources/tools. The latest PDF version of this manual can be downloaded the Agda language is given in chapter Language Reference. Guidance on how the Agda editing and compilation system can be used can be found in chapter Tools. Getting Started ### 2.1 What is Agda Static values The STATIC pragma can be used to mark definitions which should be normalised before compilation. The typical use case for this is to mark the interpreter of an embedded language as STATIC: {-#

conan.cmake) have been upgraded to accommodate this new default. ### 1.4 New features • Cross-compilation support with new default settings in settings.yml: os_build, arch_build, os_target, arch_target packages. The packages are created by the client, and if binaries are built from sources, that compilation is also done by the client application. ![Image](/uploads/documents/8/a/2/d/8a2d62d3212ed3e30 source: Where the source code for building from sources is stored. • build: Where the actual compilation of sources is done. There will typically be one subfolder for each different binary configuration

Execution ..... 1278 Parsing ..... 1279 Macro Expansion ..... 1280 Type Inference ..... 1280 JIT Code Generation ..... 1281 System Image ..... 1281 96.6 Calling Conventions ..... 1281 Julia typing, multiple dispatch, and good performance, achieved using type inference and just-in-time (JIT) compilation, implemented using LLVM. It is multi-paradigm, combining features of imperative, functional called a "run-time type" in object-oriented languages where the combination of static compilation with polymorphism makes this distinction significant. • Only values, not variables, have types