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As part of improving Cider's debugger, I need to implement special handling for all possible special-forms. In order words, I need to know all symbols which satisfy special-symbol?.
The doc page on Special Forms, while helpful, doesn't offer all of them.
For instance, after some experimentation, I've learned that
* counterpart (let* and loop*, for instance). clojure.core/import* special-symbol (which I wouldn't have found if not for sheer luck).Is there a complete list of all special symbols?
Alternatively, is there a way to list all interned symbols? If so, then I could filter over special-symbol?.
473
Strings, numbers, characters, true , false , nil and keywords evaluate to themselves. A Symbol is resolved: If it is namespace-qualified, the value is the value of the binding of the global var named by the symbol.
There may be some confusion here from the different usages of the term "symbol" in Common Lisp and in Clojure. In Common Lisp, a "symbol" is a location in memory, a place where data can be stored. The "value" of a symbol is the data stored at that location in memory. In Clojure, a "symbol" is just a name.
def is a special form that associates a symbol (x) in the current namespace with a value (7). This linkage is called a var . In most actual Clojure code, vars should refer to either a constant value or a function, but it's common to define and re-define them for convenience when working at the REPL.
A Vector is a collection of values indexed by contiguous integers. A vector is created by using the vector method in Clojure.
Looking at the definition of special-symbol? provides a big clue:
(defn special-symbol?
"Returns true if s names a special form"
{:added "1.0"
:static true}
[s]
(contains? (. clojure.lang.Compiler specials) s))
Thus:
user=> (pprint (keys (. clojure.lang.Compiler specials)))
(&
monitor-exit
case*
try
reify*
finally
loop*
do
letfn*
if
clojure.core/import*
new
deftype*
let*
fn*
recur
set!
.
var
quote
catch
throw
monitor-enter
def)
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