=begin pod

=TITLE class X::Syntax::Missing

=SUBTITLE Compilation error due to a missing piece of syntax

    class X::Syntax::Missing does X::Syntax { }

Syntax error thrown when the previous piece of syntax requires the
existence of another piece of syntax, and that second piece is missing.

For example

=for code :skip-test
for 1, 2, 3;

dies with

=for code :skip-test
===SORRY!===
Missing block

because a C<for> that is not a statement modifier must be followed by a block.

=head1 Methods

=head2 method what

    method what(--> Str:D)

Returns a string description of the missing syntax element.

=end pod
