Builtin Macros
Compiler macros use @name(...) syntax.
| Macro | Returns |
|---|---|
@as(T, expr) |
T, explicit cast |
@sizeof(T) |
usize, type size |
@alignof(T) |
usize, type alignment |
@typename(T) |
[]const char, type name |
@print(fmt, ...) |
void, stdout without newline |
@println(fmt, ...) |
void, stdout with newline |
@format(fmt, ...) |
String, heap string |
@panic(fmt, ...) |
never |
@unreachable() |
never |
@todo() |
never |
@dbg(expr) |
expr, prints [file:line] with the value (Debug only, silent in Release) |
@uninit() |
any, uninitialized value (reading it is UB) |
@enumTag(expr) |
u8, enum variant tag |
@void() |
void |
@todo() and @unreachable() lower to @panic with a message. Format strings use {} for values and {:?} for Debug.