Warning: This is the manual of the legacy Guile 2.2 series. You may want to read the manual of the current stable series instead.

7.6.2.11 rnrs records inspection

The (rnrs records inspection (6)) library provides procedures useful for accessing metadata about R6RS records.

Scheme Procedure: record? obj

Return #t if the specified object is a non-opaque R6RS record, #f otherwise.

Scheme Procedure: record-rtd record

Returns the record-type descriptor for record. An &assertion is raised if record is opaque.

Scheme Procedure: record-type-name rtd

Returns the name of the record-type descriptor rtd.

Scheme Procedure: record-type-parent rtd

Returns the parent of the record-type descriptor rtd, or #f if it has none.

Scheme Procedure: record-type-uid rtd

Returns the uid of the record-type descriptor rtd, or #f if it has none.

Scheme Procedure: record-type-generative? rtd

Returns #t if the record-type descriptor rtd is generative, #f otherwise.

Scheme Procedure: record-type-sealed? rtd

Returns #t if the record-type descriptor rtd is sealed, #f otherwise.

Scheme Procedure: record-type-opaque? rtd

Returns #t if the record-type descriptor rtd is opaque, #f otherwise.

Scheme Procedure: record-type-field-names rtd

Returns a vector of symbols giving the names of the fields defined by the record-type descriptor rtd (and not any of its sub- or supertypes).

Scheme Procedure: record-field-mutable? rtd k

Returns #t if the field at index k of the record-type descriptor rtd (and not any of its sub- or supertypes) is mutable.