Preprocessor − Comments
ASCII chart
Basic concepts
    Keywords
    Names (lookup)
    Types (fundamental types)
    Themain function
    Modules(C++20)
    Contracts(C++26)
Expressions
    Value categories
    Evaluation order
    Operators (precedence)
    Conversions − Literals
    Constant expressions
Statements
    if − switch
    for − range-for(C++11)
    while − do-while
Declarations − Initialization
Functions − Overloading
Coroutines(C++20)
Classes (unions)
Templates − Exceptions
Freestanding implementations

Program utilities
    Signals − Non-local jumps
Basic memory management
Variadic functions
source_location(C++20)
Comparison utilities(C++20)
Type support − type_info
numeric_limits − exception
initializer_list(C++11)
Coroutine support(C++20)
Contract support(C++26)

Assertions − System error(C++11)
Exception types − Error numbers
basic_stacktrace(C++23)
Debugging support(C++26)

Allocators − Smart pointers
Memory resources(C++17)

Type traits − ratio
integer_sequence(C++14)

Function objects − hash(C++11)
Swap − Type operations(C++11)
Integer comparison(C++20)
pair − tuple(C++11)
optional(C++17)
expected(C++23)
variant(C++17) − any(C++17)
bitset − Bit manipulation(C++20)

vector − deque − array(C++11)
list − forward_list(C++11)
inplace_vector(C++26)
hive(C++26)
map − multimap − set − multiset
unordered_map(C++11)
unordered_multimap(C++11)
unordered_set(C++11)
unordered_multiset(C++11)
Container adaptors
span(C++20) − mdspan(C++23)

Range factories − Range adaptors
generator(C++23)

Numeric algorithms
Execution policies(C++17)
Constrained algorithms(C++20)

basic_string − char_traits
basic_string_view(C++17)

Primitive numeric conversions(C++17)
Formatting(C++20) − Localization
text_encoding(C++26)
Regular expressions(C++11)
    basic_regex − Algorithms
    Default regular expression grammar
Null-terminated sequence utilities:
    byte − multibyte − wide

Common math functions
Mathematical special functions(C++17)
Mathematical constants(C++20)
Basic linear algebra algorithms(C++26)
Data-parallel types (SIMD)(C++26)
Pseudo-random number generation
Floating-point environment(C++11)
complex − valarray

Calendar(C++20) − Time zone(C++20)

Print functions(C++23)
Stream-based I/O − I/O manipulators
basic_istream − basic_ostream
Synchronized output(C++20)
File systems(C++17)

thread − jthread(C++20)
atomic − atomic_flag
atomic_ref(C++20) − memory_order
Mutual exclusion − Condition variables
Futures − Semaphores(C++20)
latch(C++20) − barrier(C++20)
Safe Reclamation(C++26)

Language − Standard library − Headers

    resource_adaptor − invocation_type

    propagate_const − ostream_joiner − randint
    observer_ptr − Detection idiom

    scope_exit − scope_fail − scope_success − unique_resource

simd

Basic concepts
Keywords
Preprocessor
Expressions
Declaration
Initialization
Functions
Statements

Null-terminated strings:
  byte  −  multibyte  −  wide

Common mathematical functions
Floating-point environment(C99)
Pseudo-random number generation
Complex number arithmetic(C99)
Type-generic math(C99)
Bit manipulation(C23)
Checked integer arithmetic(C23)