Guile Reference Manual: Weak hash tables
Warning:
This is the manual of the legacy Guile 2.0 series.
You may want to read the manual of
the current stable series instead.
6.18.3.1 Weak hash tables
- Scheme Procedure: make-weak-key-hash-table [size]
- Scheme Procedure: make-weak-value-hash-table [size]
- Scheme Procedure: make-doubly-weak-hash-table [size]
- C Function: scm_make_weak_key_hash_table (size)
- C Function: scm_make_weak_value_hash_table (size)
- C Function: scm_make_doubly_weak_hash_table (size)
Return a weak hash table with size buckets. As with any
hash table, choosing a good size for the table requires some
caution.
You can modify weak hash tables in exactly the same way you
would modify regular hash tables. (see Hash Tables)
- Scheme Procedure: weak-key-hash-table? obj
- Scheme Procedure: weak-value-hash-table? obj
- Scheme Procedure: doubly-weak-hash-table? obj
- C Function: scm_weak_key_hash_table_p (obj)
- C Function: scm_weak_value_hash_table_p (obj)
- C Function: scm_doubly_weak_hash_table_p (obj)
Return #t if obj is the specified weak hash
table. Note that a doubly weak hash table is neither a weak key
nor a weak value hash table.