class X::Phaser::PrePost
Error due to a false return value of a PRE/POST phaser
class X::Phaser::PrePost is Exception { }
Thrown when the condition inside a PRE or POST phaser evaluate to a
false value.
For example
sub f($x) { PRE { $x ~~ Int } };
f "foo";
CATCH { default { put .^name, ': ', .Str } };
# OUTPUT: X::Phaser::PrePost: Precondition '{ $x ~~ Int }' failed«»
Methods
method phaser
method phaser(--> Str:D)
Returns the name of the failed phaser, "PRE" or "POST".
method condition
method condition(--> Str:D)
Returns the part of the source code that describes the phaser condition.