Unlabel

This is a reverse of designate that strips an existing production from a label.

Syntax

unlabel:
        label

Example

Unlike designate, this transformation relies on the fact that all labels are unique within a grammar. This assumption allowed us to simplify the calling syntax. So, given the input:

[intexpr] expr:
        int

After using this transformation:

unlabel([intexpr]);

Will look like this:

expr:
        int

Relevant files

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

See also

• Unlabel is a part of XBGF

Contributors

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