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Module dmd.root.optional
Implementation of an 'Optional' type
Documentation
https://dlang.org/phobos/dmd_root_optional.html
Coverage
https://codecov.io/gh/dlang/dmd/src/master/src/dmd/root/optional.d
Example
import core .exception : AssertError;
Optional!int opt;
assert( opt .isEmpty());
assert(!opt .isPresent());
assert(!opt .hasValue(1));
assert(!opt .hasValue(2));
bool caught;
try
cast(void) opt .get();
catch (AssertError)
caught = true;
assert(caught);
opt = Optional!int(1);
assert(!opt .isEmpty());
assert( opt .isPresent());
writeln(opt .get()); // 1
assert( opt .hasValue(1));
assert(!opt .hasValue(2));
Structs
Name | Description |
---|---|
Optional
|
Optional type that is either empty or contains a value of type T
|
Authors
License
Copyright © 1999-2024 by the D Language Foundation | Page generated by ddox.