An RValue in many cases may be replaced with an extended notation, the extended RVAlue. Typically this style of RValue has to be the last one specified in a list of RValues. An Extended-RValue follows the rules documented here.

Refer to set→ and typical use within a set statement.

Forms

An extended-rvalue has these forms:

• as function ...→
• with ...→
• withvector ...→
• standard rvalue→
• optional ...→
• allownull ...→

The final item is the catchall. That is, should the other items not be matched (based on first word only), the Extended-RValue will be treated as a Standard-RValue and subject to expansion→

Where

This syntax is allowed:

• as the value of set→
• for the value of any item in a map created with with→
• for any value in a vector created with withvector→