std.exception.collect_exception - multiple declarations
- Function collectException
- Function collectException
Function collectException
Catches and returns the exception thrown from the given expression.
If no exception is thrown, then null is returned and resultresult of the expression.
Note that while collectExceptionThrowable and not just Exceptions, it is generally ill-advised to
catch anything that is neither an Exception nor a type derived from
Exception. So, do not use collectExceptionExceptions unless you're sure that that's what you really want to
do.
Prototype
T collectException(T, E)( E expression, E result );
Parameters
| Name | Description |
|---|---|
| T | The type of exception to catch. |
| expression | The expression which may throw an exception. |
| result | The result of the expression if no exception is thrown. |
Example
int b;
int foo() { throw new Exception("blah"); }
assert(collectException(foo(), b));
int[] a = new int[3];
import core.exception : RangeError;
assert(collectException!RangeError(a[4], b));
Function collectException
Catches and returns the exception thrown from the given expression.
If no exception is thrown, then null is returned. E can be
void.
Note that while collectExceptionThrowable and not just Exceptions, it is generally ill-advised to
catch anything that is neither an Exception nor a type derived from
Exception. So, do not use collectExceptionExceptions unless you're sure that that's what you really want to
do.
Prototype
T collectException(T, E)( E expression );
Parameters
| Name | Description |
|---|---|
| T | The type of exception to catch. |
| expression | The expression which may throw an exception. |
Authors
Andrei Alexandrescu and Jonathan M Davis