Make size argument optional to 'make-doubly-weak-hash-table'; fix docs.

* libguile/hashtab.c (scm_make_doubly_weak_hash_table): Make 'size'
  argument optional, like the weak hash table constructors.

* doc/ref/api-memory.texi (Weak hash tables): Document that 'size'
  argument is optional for the weak hash table constructors.

diff --git a/doc/ref/api-memory.texi b/doc/ref/api-memory.texi
index fe401e4..657f745 100644 (file)
--- a/doc/ref/api-memory.texi
+++ b/doc/ref/api-memory.texi
@@ -359,9 +359,9 @@ they constitute a doubly-weak table has to be used.
 @node Weak hash tables
 @subsubsection Weak hash tables
 
-@deffn {Scheme Procedure} make-weak-key-hash-table size
-@deffnx {Scheme Procedure} make-weak-value-hash-table size
-@deffnx {Scheme Procedure} make-doubly-weak-hash-table size
+@deffn {Scheme Procedure} make-weak-key-hash-table [size]
+@deffnx {Scheme Procedure} make-weak-value-hash-table [size]
+@deffnx {Scheme Procedure} make-doubly-weak-hash-table [size]
 @deffnx {C Function} scm_make_weak_key_hash_table (size)
 @deffnx {C Function} scm_make_weak_value_hash_table (size)
 @deffnx {C Function} scm_make_doubly_weak_hash_table (size)

diff --git a/libguile/hashtab.c b/libguile/hashtab.c
index 88cb199..9107ce5 100644 (file)
--- a/libguile/hashtab.c
+++ b/libguile/hashtab.c
@@ -519,7 +519,7 @@ SCM_DEFINE (scm_make_weak_value_hash_table, "make-weak-value-hash-table", 0, 1,
 #undef FUNC_NAME
 
 
-SCM_DEFINE (scm_make_doubly_weak_hash_table, "make-doubly-weak-hash-table", 1, 0, 0, 
+SCM_DEFINE (scm_make_doubly_weak_hash_table, "make-doubly-weak-hash-table", 0, 1, 0,
             (SCM n),
            "Return a hash table with weak keys and values with @var{size}\n"
            "buckets.  (@pxref{Hash Tables})")