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| C++20 - The Complete Guide: Errata of First Edition |
This is the errata of the 1st printing of the
book C++20 - The Complete
Guide by Nicolai
M. Josuttis.
It covers all errors that were found.
The errata is organized in
the following way:
- The first part lists technical errors
- The second part lists typos
Usually the latest electronic version covers all issues of this errata.
Page 22, 1.6.1 Delegating Free-Standing Comparison Operators: 2022-11-14
The code for the feature test macro is missing:
#ifndef __cpp_impl_three_way_comparison
bool operator==(int i, const MyType& t) {
return t == i; // OK with C++17
}
#endif
Page 4, 1.1.2 Defining Comparison Operators Since C++20
s/MyType
a;/TypeA
a;/
s/MyType
b;/TypeB
a;/
Page 19, 1.5.1 compare_three_way
s/ return std::compare_three_way{}(val<=>v.val); / return std::compare_three_way{}(val, v.val); /
Page 157-159, 6.5.1 Generic Code for Both Containers and Views
s/ const& Does Not Work for All Views / Declaring Range Parameters as const& Does Not Work for Some Views /
s/ // not callable for all views / // not callable for some views / (4 times)
s/ Non-const && DoesWork for All Views / Declaring Range Parameters as Non-const && /
Page 222, 8.4.1 Iota View, ranges/iotaview.cpp
s/ auto iv3 = std::views::iota(1); // -2 -1 0 1 ... / auto iv3 = std::views::iota(1); // 1 2 3 4 ... /
Page 240, 8.4.6 Span
s/ underlying character sequence / underlying sequence of elements /
Page 240, 11.3.6 Hours Utilities
s/ std::chrono::make24(h, toPM) / std::chrono::make24(h, isPM) /
Page 631, 19.1 New Types for Non-Type Template Parameters
s/ or and lvalue reference type / or an lvalue reference type /