LegalizeAdulthood

Outline

• Won't talk about preprocessor tricks
• Topic is very deep! To drill further, consult one or more of these books:
  • 2001: Modern C++ Design: Generic Programming and Design Patterns Applied by Andrei Alexandrescu
  • 2004: C++ Template Metaprogramming: Concepts, Tools, and Techniques from Boost and Beyond by David Abrahams and Aleksey Gurtovoy
  • 2017: C++ Templates: The Complete Guide (2nd Edition) by David Vandevoorde, Nicolai M. Josuttis, Douglas Gregor
• Template Review
  • Template expansion
• Function Template

LegalizeAdulthood

TEST( Foo, foo )
{
  int failures = 0;
  for (int i = 0; i < 50; ++i) {
    EXPECT_TRUE( i % 2 == 0 ) << ([&failures]() { ++failures; return ""; })();
  }
  if (failures > 0) {
    std::cout << "There were " << failures << " failures.\n";
  }
}

LegalizeAdulthood

My Clang Contributions

• clang tooling library:
  • AST matchers:
    • extend hasType to work with TypedefDecl nodes
    • add functionProtoType matcher for matching FunctionProtoType nodes
    • extend parameterCountIs matcher to FunctionProtoType nodes
• clang-tidy checks:
  • modernize-macro-to-enum converts groups of macros to unscoped anonymous enums
• modernize-raw-string-literal converts string literals with escaped characters to raw string literals

LegalizeAdulthood

#include "type_traits.h"
#include <type_traits>

// In each test, replace XXX with syntax that passes the test.

BOOST_AUTO_TEST_CASE(is_void)
{
    BOOST_REQUIRE_EQUAL(true, std::is_void<XXX>::value);
    std::is_void<XXX> val;
    BOOST_REQUIRE_EQUAL(true, static_cast<bool>(val));