Rules / Types, classes & roles / exception

X::Syntax::Reserved Reference

Compilation error due to use of syntax reserved for future use

What it is #

Routines #

Signatures are reproduced from the documentation, including their declared return types. A routine listed here is part of the type's published interface; whether Raku++ implements it is a separate question, answered by the examples below.

method reserved #

method reserved(--> Str:D)

Returns Str:D.

Returns a text description of the reserved syntax.

method instead #

method instead(--> Str)

Returns Str.

Describes what to use instead of the reserved syntax (if anything).

Examples, run three ways #

Every example below comes from the official documentation, together with the output that documentation asserts. Each was then executed by Rakudo and by Raku++ when this page was built. Where the three agree, one result is shown; where they do not, all three are — because which of them is wrong is exactly the information worth having.

3 no-output

class X::Syntax::Reserved does X::Syntax { }

Not executed: the documentation states no expected output for this example.

my @a();

Not executed: the documentation states no expected output for this example.

The () shape syntax in array declarations is reserved

Not executed: the documentation states no expected output for this example.