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Code Issues 1 Releases Wiki Activity

Allow using keywords as names for anonymous functions.

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This allows for better stack traces in macros and generally
easier debugging.
This commit is contained in:
Calvin Rose
2024-05-25 16:36:08 -05:00
parent 6d5fc1d743
commit eb21d4fff4
2 changed files with 37 additions and 33 deletions
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63
src/boot/boot.janet
View File

@@ -244,7 +244,7 @@
(let [[[err fib]] catch
f (gensym)
r (gensym)]
~(let [,f (,fiber/new (fn [] ,body) :ie)
~(let [,f (,fiber/new (fn :try [] ,body) :ie)
,r (,resume ,f)]
(if (,= (,fiber/status ,f) :error)
(do (def ,err ,r) ,(if fib ~(def ,fib ,f)) ,;(tuple/slice catch 1))
@@ -256,7 +256,7 @@
error, and the second is the return value or error.`
[& body]
(let [f (gensym) r (gensym)]
~(let [,f (,fiber/new (fn [] ,;body) :ie)
~(let [,f (,fiber/new (fn :protect [] ,;body) :ie)
,r (,resume ,f)]
[(,not= :error (,fiber/status ,f)) ,r])))
@@ -313,7 +313,7 @@
[form & body]
(with-syms [f r]
~(do
(def ,f (,fiber/new (fn [] ,;body) :ti))
(def ,f (,fiber/new (fn :defer [] ,;body) :ti))
(def ,r (,resume ,f))
,form
(if (= (,fiber/status ,f) :dead)
@@ -326,7 +326,7 @@
[form & body]
(with-syms [f r]
~(do
(def ,f (,fiber/new (fn [] ,;body) :ti))
(def ,f (,fiber/new (fn :edefer [] ,;body) :ti))
(def ,r (,resume ,f))
(if (= (,fiber/status ,f) :dead)
,r
@@ -338,7 +338,7 @@
[tag & body]
(with-syms [res target payload fib]
~(do
(def ,fib (,fiber/new (fn [] [,tag (do ,;body)]) :i0))
(def ,fib (,fiber/new (fn :prompt [] [,tag (do ,;body)]) :i0))
(def ,res (,resume ,fib))
(def [,target ,payload] ,res)
(if (,= ,tag ,target)
@@ -629,17 +629,17 @@
``Create a generator expression using the `loop` syntax. Returns a fiber
that yields all values inside the loop in order. See `loop` for details.``
[head & body]
~(,fiber/new (fn [] (loop ,head (yield (do ,;body)))) :yi))
~(,fiber/new (fn :generate [] (loop ,head (yield (do ,;body)))) :yi))
(defmacro coro
"A wrapper for making fibers that may yield multiple values (coroutine). Same as `(fiber/new (fn [] ;body) :yi)`."
[& body]
(tuple fiber/new (tuple 'fn '[] ;body) :yi))
(tuple fiber/new (tuple 'fn :coro '[] ;body) :yi))
(defmacro fiber-fn
"A wrapper for making fibers. Same as `(fiber/new (fn [] ;body) flags)`."
[flags & body]
(tuple fiber/new (tuple 'fn '[] ;body) flags))
(tuple fiber/new (tuple 'fn :fiber-fn '[] ;body) flags))
(defn sum
"Returns the sum of xs. If xs is empty, returns 0."
@@ -702,11 +702,11 @@
(case (length functions)
0 nil
1 (in functions 0)
2 (let [[f g] functions] (fn [& x] (f (g ;x))))
3 (let [[f g h] functions] (fn [& x] (f (g (h ;x)))))
4 (let [[f g h i] functions] (fn [& x] (f (g (h (i ;x))))))
2 (let [[f g] functions] (fn :comp [& x] (f (g ;x))))
3 (let [[f g h] functions] (fn :comp [& x] (f (g (h ;x)))))
4 (let [[f g h i] functions] (fn :comp [& x] (f (g (h (i ;x))))))
(let [[f g h i] functions]
(comp (fn [x] (f (g (h (i x)))))
(comp (fn :comp [x] (f (g (h (i x)))))
;(tuple/slice functions 4 -1)))))
(defn identity
@@ -717,7 +717,7 @@
(defn complement
"Returns a function that is the complement to the argument."
[f]
(fn [x] (not (f x))))
(fn :complement [x] (not (f x))))
(defmacro- do-extreme
[order args]
@@ -880,7 +880,7 @@
``Sorts `ind` in-place by calling a function `f` on each element and
comparing the result with `<`.``
[f ind]
(sort ind (fn [x y] (< (f x) (f y)))))
(sort ind (fn :sort-by-comp [x y] (< (f x) (f y)))))
(defn sorted
``Returns a new sorted array without modifying the old one.
@@ -893,7 +893,7 @@
``Returns a new sorted array that compares elements by invoking
a function `f` on each element and comparing the result with `<`.``
[f ind]
(sorted ind (fn [x y] (< (f x) (f y)))))
(sorted ind (fn :sorted-by-comp [x y] (< (f x) (f y)))))
(defn reduce
``Reduce, also know as fold-left in many languages, transforms
@@ -1192,7 +1192,7 @@
``Returns the juxtaposition of functions. In other words,
`((juxt* a b c) x)` evaluates to `[(a x) (b x) (c x)]`.``
[& funs]
(fn [& args]
(fn :juxt* [& args]
(def ret @[])
(each f funs
(array/push ret (f ;args)))
@@ -1205,7 +1205,7 @@
(def $args (gensym))
(each f funs
(array/push parts (tuple apply f $args)))
(tuple 'fn (tuple '& $args) (tuple/slice parts 0)))
(tuple 'fn :juxt (tuple '& $args) (tuple/slice parts 0)))
(defmacro defdyn
``Define an alias for a keyword that is used as a dynamic binding. The
@@ -1421,12 +1421,12 @@
(def dyn-forms
(seq [i :range [0 (length bindings) 2]]
~(setdyn ,(bindings i) ,(bindings (+ i 1)))))
~(,resume (,fiber/new (fn [] ,;dyn-forms ,;body) :p)))
~(,resume (,fiber/new (fn :with-dyns [] ,;dyn-forms ,;body) :p)))
(defmacro with-env
`Run a block of code with a given environment table`
[env & body]
~(,resume (,fiber/new (fn [] ,;body) : ,env)))
~(,resume (,fiber/new (fn :with-env [] ,;body) : ,env)))
(defmacro with-vars
``Evaluates `body` with each var in `vars` temporarily bound. Similar signature to
@@ -1441,7 +1441,7 @@
(with-syms [ret f s]
~(do
,;saveold
(def ,f (,fiber/new (fn [] ,;setnew ,;body) :ti))
(def ,f (,fiber/new (fn :with-vars [] ,;setnew ,;body) :ti))
(def ,ret (,resume ,f))
,;restoreold
(if (= (,fiber/status ,f) :dead) ,ret (,propagate ,ret ,f)))))
@@ -1450,7 +1450,7 @@
"Partial function application."
[f & more]
(if (zero? (length more)) f
(fn [& r] (f ;more ;r))))
(fn :partial [& r] (f ;more ;r))))
(defn every?
``Evaluates to the last element of `ind` if all preceding elements are truthy,
@@ -1807,7 +1807,6 @@
(printf (dyn *pretty-format* "%q") x)
(flush))
(defn file/lines
"Return an iterator over the lines of a file."
[file]
@@ -2330,7 +2329,7 @@
x)))
x))
(def expanded (macex arg on-binding))
(def name-splice (if name [name] []))
(def name-splice (if name [name] [:short-fn]))
(def fn-args (seq [i :range [0 (+ 1 max-param-seen)]] (symbol prefix '$ i)))
~(fn ,;name-splice [,;fn-args ,;(if vararg ['& (symbol prefix '$&)] [])] ,expanded))
@@ -2547,7 +2546,7 @@
:read read
:expander expand} opts)
(default env (or (fiber/getenv (fiber/current)) @{}))
(default chunks (fn [buf p] (getline "" buf env)))
(default chunks (fn chunks [buf p] (getline "" buf env)))
(default onstatus debug/stacktrace)
(default on-compile-error bad-compile)
(default on-compile-warning warn-compile)
@@ -2867,7 +2866,7 @@
(set ret [fullpath mod-kind])
(break))))))
(if ret ret
(let [expander (fn [[t _ chk]]
(let [expander (fn :expander [[t _ chk]]
(when (string? t)
(when (mod-filter chk path)
(module/expand-path path t))))
@@ -2934,7 +2933,7 @@
set to a truthy value."
[env &opt level is-repl]
(default level 1)
(fn [f x]
(fn :debugger [f x]
(def fs (fiber/status f))
(if (= :dead fs)
(when is-repl
@@ -3704,7 +3703,7 @@
[&opt chunks onsignal env parser read]
(default env (make-env))
(default chunks
(fn [buf p]
(fn :chunks [buf p]
(getline
(string
"repl:"
@@ -3735,18 +3734,18 @@
Returns a fiber that is scheduled to run the function.
```
[f & args]
(ev/go (fn _call [&] (f ;args))))
(ev/go (fn :call [&] (f ;args))))
(defmacro ev/spawn
"Run some code in a new fiber. This is shorthand for `(ev/go (fn [] ;body))`."
[& body]
~(,ev/go (fn _spawn [&] ,;body)))
~(,ev/go (fn :spawn [&] ,;body)))
(defmacro ev/do-thread
``Run some code in a new thread. Suspends the current fiber until the thread is complete, and
evaluates to nil.``
[& body]
~(,ev/thread (fn _do-thread [&] ,;body)))
~(,ev/thread (fn :do-thread [&] ,;body)))
(defn- acquire-release
[acq rel lock body]
@@ -3775,7 +3774,7 @@
(defmacro ev/spawn-thread
``Run some code in a new thread. Like `ev/do-thread`, but returns nil immediately.``
[& body]
~(,ev/thread (fn _spawn-thread [&] ,;body) nil :n))
~(,ev/thread (fn :spawn-thread [&] ,;body) nil :n))
(defmacro ev/with-deadline
``
@@ -3824,7 +3823,7 @@
(def ,res @[])
,;(seq [[i body] :pairs bodies]
~(do
(def ,ftemp (,ev/go (fn [] (put ,res ,i ,body)) nil ,chan))
(def ,ftemp (,ev/go (fn :ev/gather [] (put ,res ,i ,body)) nil ,chan))
(,put ,fset ,ftemp ,ftemp)))
(,wait-for-fibers ,chan ,fset)
,res))))

7
src/core/specials.c
View File

@@ -925,6 +925,7 @@ static JanetSlot janetc_fn(JanetFopts opts, int32_t argn, const Janet *argv) {
int structarg = 0;
int allow_extra = 0;
int selfref = 0;
int hasname = 0;
int seenamp = 0;
int seenopt = 0;
int namedargs = 0;
@@ -943,6 +944,10 @@ static JanetSlot janetc_fn(JanetFopts opts, int32_t argn, const Janet *argv) {
head = argv[0];
if (janet_checktype(head, JANET_SYMBOL)) {
selfref = 1;
hasname = 1;
parami = 1;
} else if (janet_checktype(head, JANET_KEYWORD)) {
hasname = 1;
parami = 1;
}
if (parami >= argn || !janet_checktype(argv[parami], JANET_TUPLE)) {
@@ -1103,7 +1108,7 @@ static JanetSlot janetc_fn(JanetFopts opts, int32_t argn, const Janet *argv) {
if (vararg) def->flags |= JANET_FUNCDEF_FLAG_VARARG;
if (structarg) def->flags |= JANET_FUNCDEF_FLAG_STRUCTARG;
if (selfref) def->name = janet_unwrap_symbol(head);
if (hasname) def->name = janet_unwrap_symbol(head); /* Also correctly unwraps keyword */
janet_def_addflags(def);
defindex = janetc_addfuncdef(c, def);