clojure.repl

A var's documentation and a throwable's stack trace. Require clojure.repl to use it (the clojure> REPL refers doc and pst already, see REPL); it is Clojure source written for rontolisp from the documented behavior of Clojure's namespace, and runs the same on every backend.

Var	Behavior
`doc`	`(doc name)`: prints the var's name, its argument lists, `Macro` for a macro, and its docstring, as its definition gave them; for a special form its name, `Special Form` and its clojure.org page
`pst`	`(pst)`, `(pst e-or-depth)`, `(pst e depth)`: prints the throwable's simple class name, message and `ex-data` to `err`, then each cause after `Caused by:`; without a throwable, the root cause of `*e`
`root-cause`	`(root-cause t)`: the innermost cause of `t`, following its causes; `t` when it has none
`demunge`	`(demunge s)`: the Clojure spelling of a function's class name, as a stack trace element names it
`stack-element-str`	`(stack-element-str el)`: a host `StackTraceElement` as text, a Clojure function by its demunged name (interpreter and JVM)

-------------------------
user/add-one
([x])
  Adds one.

Not built in

Each of these is refused by name when the program is lowered:

dir, dir-fn, apropos, find-doc: a namespace's vars are known only while the program is lowered.
source, source-fn: a definition's text is not kept at run time.
set-break-handler!, thread-stopper: there is no signal handler, and the JDK no longer supports Thread.stop.

Differences

doc of a special form prints its name, Special Form and the clojure.org link, without Clojure's forms and text. A clojure.core var's metadata holds only :name and :ns, so doc prints its name alone.
doc of a name that is no var, a namespace's included, is the lowering's Unable to resolve var, where Clojure prints the namespace's docstring or nothing; doc of a keyword (a spec) is refused.
A throwable carries no stack frames here, so pst prints none.