Disappear

This operator behaves like project, but only allows for nillable elements (optional, star) to disappear.

Syntax

disappear:
        marked-production

Example

Given the input:

foo:
        bar wez* qux

After using this transformation:

disappear(
 foo:
        bar <wez*> qux
);

The result will look like this:

foo:
        bar qux

Relevant files

• shared/prolog/xbgf1.pro
• shared/rascal/src/transform/library/Sequential.rsc
• shared/xsd/xbgf.xsd

See also

• Disappear is a part of XBGF

Contributors

• Ralf Lämmel (@rlaemmel)
• Vadim Zaytsev (@grammarware)