Throwable

The base class of all thrown objects.

All thrown objects must inherit from Throwable. Class Exception, which derives from this class, represents the category of thrown objects that are safe to catch and handle. In principle, one should not catch Throwable objects that are not derived from Exception, as they represent unrecoverable runtime errors. Certain runtime guarantees may fail to hold when these errors are thrown, making it unsafe to continue execution after catching them.

class Throwable : Object {

string msg;

string file;

size_t line;

TraceInfo info;

inout(Throwable) next();

void next(Throwable tail);

uint refcount();

int opApply(scope int delegate(Throwable) dg);

static Throwable chainTogether(return scope Throwable e1, return scope Throwable e2);

string toString();

void toString(scope void delegate(in char[]) sink);

const(char)[] message();

}

Destructor

A destructor is present on this object, but not explicitly documented in the source.

Members

Functions

message const(char)[] message(): Get the message describing the error. Base behavior is to return the Throwable.msg field. Override to return some other error message.
next inout(Throwable) next()
next void next(Throwable tail): Replace next in chain with tail. Use chainTogether instead if at all possible.
opApply int opApply(scope int delegate(Throwable) dg): Loop over the chain of Throwables.
refcount uint refcount()
toString string toString(): Overrides Object.toString and returns the error message. Internally this forwards to the toString overload that takes a sink delegate.
toString void toString(scope void delegate(in char[]) sink): The Throwable hierarchy uses a toString overload that takes a _sink delegate to avoid GC allocations, which cannot be performed in certain error situations. Override this toString method to customize the error message.

Static functions

chainTogether Throwable chainTogether(return scope Throwable e1, return scope Throwable e2): Append e2 to chain of exceptions that starts with e1.

Variables

file string file;: The file name of the D source code corresponding with where the error was thrown from.
info TraceInfo info;: The stack trace of where the error happened. This is an opaque object that can either be converted to string, or iterated over with foreach to extract the items in the stack trace (as strings).
line size_t line;: The line number of the D source code corresponding with where the error was thrown from.

Inherited Members

From Object

toString string toString(): Convert Object to a human readable string.
toHash size_t toHash(): Compute hash function for Object.
opCmp int opCmp(Object o): Compare with another Object obj.
opEquals bool opEquals(Object o): Test whether this is equal to o. The default implementation only compares by identity (using the is operator). Generally, overrides for opEquals should attempt to compare objects by their contents.
factory Object factory(string classname): Create instance of class specified by the fully qualified name classname. The class must either have no constructors or have a default constructor.

object classes

functions

structs

templates

RTInfoImpl

variables

rtinfoNoPointers