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Core Syntax
module declaration imports immutable const auto type inference enum constants scope statement static if version conditions pragma msg
Types
integral types floating types arrays slices associative arrays tuples structs unions enums alias declarations
Functions
functions ref parameters out parameters default arguments variadic functions function literals delegates UFCS pure functions nothrow functions
Templates
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Ranges
input ranges forward ranges bidirectional ranges random access ranges map filter reduce take zip lazy evaluation
OOP
classes interfaces inheritance virtual methods final methods abstract classes properties operator overloading opDispatch object lifetime
Memory and Safety
GC allocation scope lifetime RAII structs @safe @trusted @system bounds checking synchronized shared core.atomic
Errors and I/O
exceptions try catch finally assert enforce File readText writeln formattedWrite unit tests contracts in out do
D / Memory and Safety

@trusted

Learn @trusted in D with a construct-specific explanation, unique example, engineering boundary, and mastery check.

10 min read • Advanced

@trusted is a focused D topic inside Memory and Safety. This lesson explains the construct itself, the state or value it operates on, and the observable result it produces.

Read the example as a small executable experiment. Identify the exact syntax that belongs to @trusted, then change one input and predict the result before running it.

Topic-specific example

d-07-05-trusted.d
d Try It Live 
@trusted int peek(int* p){ return *p; }
Edge case / engineering note

@trusted has rules that are easy to miss when the example is copied mechanically. Check the feature-specific boundary shown by this construct: scope, mutability, evaluation order, type constraints, lifetime, error behavior, compile-time restrictions, or resource cleanup where applicable.

Content source & attribution
Original Syntaxis Content · Original Syntaxis Content

Lesson quizzes

@trusted Mastery Check →
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