Things that NQP needs

This list is based on discussions with pmichaud and unimplemented items in the grammar, src/Grammar.pg.

Last updated: 2007-11-24

Code

• & sigil

  Handle the mapping between &foo and 'foo' subroutines.

• return statement

  While it seems like implementing return would be a simple matter of generating PIR .return statements, it's not quite that simple, because return statements can occur inside of nested blocks.

  So, we need an NQP return statement to throw a "return exception", which is then caught by the outermost block of the currently executing subroutine and then used as the argument to .return.

  Fortunately, the new design of S05 means that we don't really need return statements for developing action grammars, so this is no longer as much of a priority as it was.

• Named argument (not param) support

  PAST now supports named arguments in subroutines, we simply need to modify the grammar to parse named arguments in subroutine declarations and build the appropriate actions to fill in the PAST::Var parameter nodes.

• Optional arguments

Tests

• Method ops

  We should be able to load an external module (Pm suggests Test.pbc) and exercise methods using that.

• Hash key access $var<someKey>

• List member access $var[index]

• Match variable access $/

• Scalar context $( ... )

• List context @( ... )

• Variables with twigils