RAII mutex locks

Named lock guards

scoped_lock for multi-mutex

Condition variable predicate

No volatile for sync

Smart pointer ownership

Prefer unique_ptr

make_unique / make_shared

Const correctness

Brace initialization

Mutex with data

No detached threads

Virtual base destructor

override keyword

Explicit constructors

Polymorphic copy suppressed

Rule of Zero applied

Rule of Five applied

enum class not plain enum

No ALL_CAPS enumerators

Const member functions

underscore_style naming

Trailing underscore members

Include guards or pragma once

No using namespace in header

Concepts on templates

Standard concepts used

using over typedef

string_view for read-only strings

vector over C arrays

Brace initialization

nullptr not NULL or 0

No magic numbers

No C-style casts

Struct for multiple returns

Custom exception types

Throw by value, catch by ref

newline not endl

Const variables by default