Debug

capability

capability Debug

Produces an unambiguous structural representation of a value.

String and char values are quoted and escaped. Source records and enums derive a multiline representation recursively when every contained value implements Debug. Standard-library containers opt into the same conditional derivation for their element or payload types.

Every Debug value also implements Display. A custom Display.toString remains the user-facing representation, while Debug.debugString controls how a value appears inside another derived value.

Examples

Preserve quotes around nested text

let checkpoints = ["forest", "castle"]
print(checkpoints)

Requires

Member	Description	Available through
Display	Supports conversion to a user-facing textual representation.

Implemented by

Member	Description	Available through
FileVersion	A four-part numeric Windows executable version.
None	Stores the single unit value `None`.
String	Stores ordinary immutable UTF-8 text in WebAssembly GC memory.
address	Stores a process address.
bool	Stores a boolean value.
char	Stores one Unicode scalar value.
f32	Stores a 32-bit floating-point number.
f64	Stores a 64-bit floating-point number.
i16	Stores a 16-bit signed integer.
i32	Stores a 32-bit signed integer.
i64	Stores a 64-bit signed integer.
i8	Stores an 8-bit signed integer.
u16	Stores a 16-bit unsigned integer.
u32	Stores a 32-bit unsigned integer.
u64	Stores a 64-bit unsigned integer.
u8	Stores an 8-bit unsigned integer.

Methods

Member	Description	Available through
debugString	Converts the receiver to its unambiguous structural representation.