module declaration imports immutable const auto type inference enum constants scope statement static if version conditions pragma msg

integral types floating types arrays slices associative arrays tuples structs unions enums alias declarations

functions ref parameters out parameters default arguments variadic functions function literals delegates UFCS pure functions nothrow functions

function templates class templates template constraints alias parameters value parameters variadic templates static foreach mixin templates string mixins is expressions

input ranges forward ranges bidirectional ranges random access ranges map filter reduce take zip lazy evaluation

classes interfaces inheritance virtual methods final methods abstract classes properties operator overloading opDispatch object lifetime

GC allocation scope lifetime RAII structs @safe @trusted @system bounds checking synchronized shared core.atomic

exceptions try catch finally assert enforce File readText writeln formattedWrite unit tests contracts in out do