diff options
Diffstat (limited to 'txr.1')
| -rw-r--r-- | txr.1 | 50 |
1 files changed, 50 insertions, 0 deletions
@@ -18829,6 +18829,29 @@ stands for "unbound". The function produced by is not bound to any specific object; it binds to an object whenever it is invoked by retrieving the actual method from the object's slot at call time. +.coNP Macro @ usl +.synb +.mets (usl << slot ) +.syne +.desc +The +.code usl +macro binds the symbol +.meta slot +to a function and returns that function. + +When that function is called, it expects exactly one argument. +That argument must be an object of struct type. +The slot named +.meta slot +is retrieved from that object and returned. + +The name +.code usl +stands for "unbound slot". The term "unbound" refers to the returned +function not being bound to a particular object. The binding of the +slot to an object takes place whenever the function is called. + .coNP Function @ make-struct-type .synb .mets (make-struct-type < name < super < static-slots < slots @@ -19318,6 +19341,33 @@ function, doesn't return a method whose leftmost argument is already bound to an object; the binding occurs at call time. +.coNP Function @ uslot +.synb +.mets (uslot << slot-name ) +.syne +.desc +The +.code uslot +returns a function which represents all slots named +.meta slot-name +in all structure types, including ones not yet defined. +The +.meta slot-name +argument must be a symbol. + +The returned function must be called with exactly one argument. +The argument must be a structure which has a slot named +.metn slot-name . +The function will retrieve the value of the slot from that object +and return it. + +Note: the +.code uslot +name stands for "unbound slot". The returned function +isn't bound to a particular object. The binding of +.code slot-name +to a slot in the structure object occurs when the function is called. + .coNP Function @ slotp .synb .mets (slotp < type << name ) |