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https://github.com/janet-lang/janet
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Work on making range take non-integer values.
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@ -153,6 +153,51 @@
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,v
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(,error ,(if err err (string/format "assert failure in %j" x))))))
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(defmacro defdyn
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``Define an alias for a keyword that is used as a dynamic binding. The
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alias is a normal, lexically scoped binding that can be used instead of
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a keyword to prevent typos. `defdyn` does not set dynamic bindings or otherwise
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replace `dyn` and `setdyn`. The alias _must_ start and end with the `*` character, usually
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called "earmuffs".``
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[alias & more]
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(assert (symbol? alias) "alias must be a symbol")
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(assert (> (length alias) 2) "name must have leading and trailing '*' characters")
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(assert (= 42 (get alias 0) (get alias (- (length alias) 1))) "name must have leading and trailing '*' characters")
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(def prefix (dyn :defdyn-prefix))
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(def kw (keyword prefix (slice alias 1 -2)))
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~(def ,alias :dyn ,;more ,kw))
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(defdyn *macro-form*
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"Inside a macro, is bound to the source form that invoked the macro")
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(defdyn *lint-error*
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"The current lint error level. The error level is the lint level at which compilation will exit with an error and not continue.")
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(defdyn *lint-warn*
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"The current lint warning level. The warning level is the lint level at which and error will be printed but compilation will continue as normal.")
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(defdyn *lint-levels*
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"A table of keyword alias to numbers denoting a lint level. Can be used to provided custom aliases for numeric lint levels.")
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(defdyn *macro-lints*
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``Bound to an array of lint messages that will be reported by the compiler inside a macro.
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To indicate an error or warning, a macro author should use `maclintf`.``)
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(defn maclintf
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``When inside a macro, call this function to add a linter warning. Takes
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a `fmt` argument like `string/format`, which is used to format the message.``
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[level fmt & args]
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(def lints (dyn *macro-lints*))
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(if lints
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(do
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(def form (dyn *macro-form*))
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(def [l c] (if (tuple? form) (tuple/sourcemap form) [nil nil]))
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(def l (if (not= -1 l) l))
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(def c (if (not= -1 c) c))
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(def msg (string/format fmt ;args))
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(array/push lints [level l c msg])))
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nil)
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(defn errorf
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"A combination of `error` and `string/format`. Equivalent to `(error (string/format fmt ;args))`."
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[fmt & args]
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@ -531,6 +576,11 @@
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[x ds & body]
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(each-template x ds :each body))
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(defn- check-empty-body
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[body]
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(if (= (length body) 0)
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(maclintf :normal "empty loop body")))
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(defmacro loop
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```
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A general purpose loop macro. This macro is similar to the Common Lisp loop
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@ -602,6 +652,7 @@
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The `loop` macro always evaluates to nil.
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```
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[head & body]
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(check-empty-body body)
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(loop1 body head 0))
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(defmacro seq
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@ -609,6 +660,7 @@
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See `loop` for details.``
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[head & body]
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(def $accum (gensym))
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(check-empty-body body)
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~(do (def ,$accum @[]) (loop ,head (,array/push ,$accum (do ,;body))) ,$accum))
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(defmacro catseq
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@ -616,6 +668,7 @@
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See `loop` for details.``
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[head & body]
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(def $accum (gensym))
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(check-empty-body body)
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~(do (def ,$accum @[]) (loop ,head (,array/concat ,$accum (do ,;body))) ,$accum))
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(defmacro tabseq
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@ -629,6 +682,7 @@
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``Create a generator expression using the `loop` syntax. Returns a fiber
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that yields all values inside the loop in order. See `loop` for details.``
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[head & body]
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(check-empty-body body)
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~(,fiber/new (fn :generate [] (loop ,head (yield (do ,;body)))) :yi))
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(defmacro coro
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@ -1207,19 +1261,6 @@
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(array/push parts (tuple apply f $args)))
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(tuple 'fn :juxt (tuple '& $args) (tuple/slice parts 0)))
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(defmacro defdyn
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``Define an alias for a keyword that is used as a dynamic binding. The
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alias is a normal, lexically scoped binding that can be used instead of
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a keyword to prevent typos. `defdyn` does not set dynamic bindings or otherwise
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replace `dyn` and `setdyn`. The alias _must_ start and end with the `*` character, usually
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called "earmuffs".``
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[alias & more]
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(assert (symbol? alias) "alias must be a symbol")
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(assert (and (> (length alias) 2) (= 42 (first alias) (last alias))) "name must have leading and trailing '*' characters")
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(def prefix (dyn :defdyn-prefix))
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(def kw (keyword prefix (slice alias 1 -2)))
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~(def ,alias :dyn ,;more ,kw))
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(defn has-key?
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"Check if a data structure `ds` contains the key `key`."
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[ds key]
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@ -1240,18 +1281,6 @@
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(defdyn *exit-value* "Set the return value from `run-context` upon an exit. By default, `run-context` will return nil.")
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(defdyn *task-id* "When spawning a thread or fiber, the task-id can be assigned for concurrency control.")
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(defdyn *macro-form*
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"Inside a macro, is bound to the source form that invoked the macro")
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(defdyn *lint-error*
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"The current lint error level. The error level is the lint level at which compilation will exit with an error and not continue.")
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(defdyn *lint-warn*
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"The current lint warning level. The warning level is the lint level at which and error will be printed but compilation will continue as normal.")
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(defdyn *lint-levels*
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"A table of keyword alias to numbers denoting a lint level. Can be used to provided custom aliases for numeric lint levels.")
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(defdyn *current-file*
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"Bound to the name of the currently compiling file.")
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@ -2035,24 +2064,6 @@
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###
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###
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(defdyn *macro-lints*
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``Bound to an array of lint messages that will be reported by the compiler inside a macro.
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To indicate an error or warning, a macro author should use `maclintf`.``)
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(defn maclintf
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``When inside a macro, call this function to add a linter warning. Takes
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a `fmt` argument like `string/format`, which is used to format the message.``
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[level fmt & args]
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(def lints (dyn *macro-lints*))
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(when lints
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(def form (dyn *macro-form*))
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(def [l c] (if (tuple? form) (tuple/sourcemap form) [nil nil]))
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(def l (if-not (= -1 l) l))
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(def c (if-not (= -1 c) c))
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(def msg (string/format fmt ;args))
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(array/push lints [level l c msg]))
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nil)
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(defn macex1
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``Expand macros in a form, but do not recursively expand macros.
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See `macex` docs for info on `on-binding`.``
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@ -432,27 +432,28 @@ JANET_CORE_FN(janet_core_range,
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"With one argument, returns a range [0, end). With two arguments, returns "
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"a range [start, end). With three, returns a range with optional step size.") {
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janet_arity(argc, 1, 3);
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int32_t start = 0, stop = 0, step = 1, count = 0;
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double start = 0, stop = 0, step = 1, count = 0;
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if (argc == 3) {
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start = janet_getinteger(argv, 0);
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stop = janet_getinteger(argv, 1);
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step = janet_getinteger(argv, 2);
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count = (step > 0) ? (stop - start - 1) / step + 1 :
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((step < 0) ? (stop - start + 1) / step + 1 : 0);
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start = janet_getnumber(argv, 0);
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stop = janet_getnumber(argv, 1);
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step = janet_getnumber(argv, 2);
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count = (step > 0) ? (stop - start) / step :
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((step < 0) ? (stop - start) / step : 0);
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} else if (argc == 2) {
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start = janet_getinteger(argv, 0);
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stop = janet_getinteger(argv, 1);
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start = janet_getnumber(argv, 0);
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stop = janet_getnumber(argv, 1);
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count = stop - start;
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} else {
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stop = janet_getinteger(argv, 0);
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stop = janet_getnumber(argv, 0);
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count = stop;
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}
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count = (count > 0) ? count : 0;
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JanetArray *array = janet_array(count);
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for (int32_t i = 0; i < count; i++) {
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int32_t int_count = ceil(count);
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JanetArray *array = janet_array(int_count);
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for (int32_t i = 0; i < int_count; i++) {
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array->data[i] = janet_wrap_number(start + i * step);
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}
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array->count = count;
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array->count = int_count;
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return janet_wrap_array(array);
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}
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