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Fix nested inline fn expansion #34
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@@ -0,0 +1,3 @@ | ||
((nil . ((indent-tabs-mode . nil) | ||
(require-final-newline . t))) | ||
(clojure-mode . ((cljr-favor-prefix-notation . nil)))) | ||
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@@ -1,4 +1,4 @@ | ||
(defproject riddley "0.2.0" | ||
(defproject riddley "0.2.1-SNAPSHOT" | ||
:description "code-walking without caveats" | ||
:license {:name "MIT License" | ||
:url "http://opensource.org/licenses/MIT"} | ||
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@@ -9,6 +9,10 @@ | |
:defaults {:doc/format :markdown} | ||
:include [riddley.walk riddley.compiler] | ||
:output-dir "doc"} | ||
:profiles {:provided {:dependencies [[org.clojure/clojure "1.8.0"]]}} | ||
:profiles {:provided {:dependencies [[org.clojure/clojure "1.8.0"]]} | ||
:dev {:dependencies [[org.clojure/clojure "1.10.1"] | ||
[pjstadig/humane-test-output "0.10.0"]] | ||
:injections [(require 'pjstadig.humane-test-output) | ||
(pjstadig.humane-test-output/activate!)]}} | ||
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There was a problem hiding this comment. Choose a reason for hiding this commentThe reason will be displayed to describe this comment to others. Learn more. Added a |
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:java-source-paths ["src/riddley"] | ||
:javac-options ["-target" "1.6" "-source" "1.6"]) | ||
:javac-options ["-target" "1.7" "-source" "1.7"]) | ||
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There was a problem hiding this comment. Choose a reason for hiding this commentThe reason will be displayed to describe this comment to others. Learn more. I'm using Java 14 locally and it doesn't support compiling to Java 1.6 bytecode. I think dropping 1.6 support makes sense -- Clojure 1.10+ requires Java 8+ and Clojure 1.5+ requires Java 7 for all features to work out-of-the-box |
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@@ -1,57 +1,93 @@ | ||
(ns riddley.walk | ||
(:refer-clojure :exclude [macroexpand]) | ||
(:require | ||
[riddley.compiler :as cmp])) | ||
[riddley.compiler :as cmp])) | ||
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(declare macroexpand) | ||
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(defn merge-meta | ||
"If `form` can have metadata, merge other `metadatas` into its metadata. Keys in `form`'s metadata are preferred over | ||
those in `metadatas`. | ||
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(meta (merge-meta {} {:a 1})) ;-> {:a 1} | ||
(meta (merge-meta nil {:a 1})) ;-> nil | ||
(meta (merge-meta (with-meta {} {:a 2}) {:a 1, :b 1})) ;-> {:a 2, :b 1}" | ||
[form & metadatas] | ||
(cond-> form | ||
(instance? clojure.lang.IObj form) (vary-meta (apply partial merge metadatas)))) | ||
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(defn- head= | ||
"True if `form` is list-like and the first element is `x`. | ||
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(head= '(a b c) 'a) ;-> true" | ||
[form x] | ||
(and (seq? form) | ||
(= (first form) x))) | ||
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(defn inline-fn | ||
"If `form` represents a call to a function that will be replaced with an inlined version by the compiler, returns the | ||
`:inline` function used to create the replacement form; otherwise returns `nil`. | ||
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(inline-fn '(+ 1 2)) ; -> #function[clojure.core/nary-inline/fn--5541] | ||
(inline-fn '(+ 1 2)) ; -> nil" | ||
[form] | ||
(when (seq? form) | ||
(let [[fn-symbol & args] form] | ||
(when (symbol? fn-symbol) | ||
;; a function is inlineable if it has an `:inline` function in its metadata, and, if it has an | ||
;; `:inline-arities` function in its metadata, returns truthy when passed the number of args in this form | ||
(let [{:keys [inline inline-arities]} (meta (resolve fn-symbol))] | ||
(when (and inline | ||
(or (not inline-arities) | ||
(inline-arities (count args)))) | ||
inline)))))) | ||
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(defn expand-inline-fn | ||
"Expand an inline function call `form` into the inlined version." | ||
([form] | ||
(expand-inline-fn form nil)) | ||
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([form special-form?] | ||
(let [inline-fn (or (inline-fn form) | ||
(throw (ex-info "Form is not an inlineable function call." {:form form})))] | ||
(macroexpand | ||
(with-meta (apply inline-fn (rest form)) (meta form)) | ||
special-form?)))) | ||
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(defn- expand-list-like | ||
"Expand a list-like `form`." | ||
([form] | ||
(expand-list-like form nil)) | ||
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([[head :as form] special-form?] | ||
(if (or (and special-form? (special-form? head)) | ||
(contains? (cmp/locals) head)) | ||
;; might look like a macro, but for our purposes it isn't | ||
form | ||
;; otherwise attempt to macroexpand | ||
(let [expanded (macroexpand-1 form)] | ||
(cond | ||
(not (identical? form expanded)) | ||
(macroexpand expanded special-form?) | ||
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;; if we can't macroexpand any further, check if it's an inlined function | ||
(inline-fn expanded) | ||
(expand-inline-fn expanded special-form?) | ||
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:else | ||
form))))) | ||
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(defn macroexpand | ||
"Expands both macros and inline functions. Optionally takes a `special-form?` predicate which | ||
identifies first elements of expressions that shouldn't be macroexpanded, and honors local | ||
bindings." | ||
([x] | ||
(macroexpand x nil)) | ||
([x special-form?] | ||
(cmp/with-base-env | ||
(if (seq? x) | ||
(let [frst (first x)] | ||
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(if (or | ||
(and special-form? (special-form? frst)) | ||
(contains? (cmp/locals) frst)) | ||
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;; might look like a macro, but for our purposes it isn't | ||
x | ||
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(let [x' (macroexpand-1 x)] | ||
(if-not (identical? x x') | ||
(macroexpand x' special-form?) | ||
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;; if we can't macroexpand any further, check if it's an inlined function | ||
(if-let [inline-fn (and (seq? x') | ||
(symbol? (first x')) | ||
(-> x' meta ::transformed not) | ||
(or | ||
(-> x' first resolve meta :inline-arities not) | ||
((-> x' first resolve meta :inline-arities) | ||
(count (rest x')))) | ||
(-> x' first resolve meta :inline))] | ||
(let [x'' (with-meta (apply inline-fn (rest x')) (meta x'))] | ||
(macroexpand | ||
;; unfortunately, static function calls can look a lot like what we just | ||
;; expanded, so prevent infinite expansion | ||
(if (= '. (first x'')) | ||
(with-meta | ||
(concat (butlast x'') | ||
[(if (instance? clojure.lang.IObj (last x'')) | ||
(with-meta (last x'') | ||
(merge | ||
(meta (last x'')) | ||
{::transformed true})) | ||
(last x''))]) | ||
(meta x'')) | ||
x'') | ||
special-form?)) | ||
x'))))) | ||
x)))) | ||
"Expands both macros and inline functions. Optionally takes a `special-form?` predicate which identifies first | ||
elements of expressions that shouldn't be macroexpanded, and honors local bindings." | ||
([form] | ||
(macroexpand form nil)) | ||
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([form special-form?] | ||
(cmp/with-base-env | ||
(if-not (seq? form) | ||
form | ||
(expand-list-like form special-form?))))) | ||
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;;; | ||
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@@ -172,23 +208,31 @@ | |
(let [[_ type var & body] x] | ||
(cmp/with-lexical-scoping | ||
(when var | ||
(cmp/register-arg (with-meta var (merge (meta var) {:tag type})))) | ||
(cmp/register-arg (vary-meta var assoc :tag type))) | ||
(list* 'catch type var | ||
(doall (map f body)))))) | ||
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(defn- try-handler [f x] | ||
(let [[_ & body] x] | ||
(list* 'try (doall (map #(f % :try-clause? true) body))))) | ||
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(defn- dot-handler [f x] | ||
(let [[_ hostexpr mem-or-meth & remainder] x] | ||
(list* '. | ||
(f hostexpr) | ||
(if (seq? mem-or-meth) | ||
(list* (first mem-or-meth) | ||
(doall (map f (rest mem-or-meth)))) | ||
(f mem-or-meth)) | ||
(doall (map f remainder))))) | ||
(defn- dot-handler | ||
"Handle java interop forms." | ||
[f [_ class-or-instance & more]] | ||
;; form is either of the syntax | ||
;; | ||
;; (. class-or-instance method & args) | ||
;; or | ||
;; (. class-or-instance (method & args)) | ||
;; | ||
;; both syntaxes are possible and equivalent | ||
(if (seq? (first more)) | ||
;; (. class-or-instance (method & args)) | ||
(let [[[method & args]] more] | ||
(list '. (f class-or-instance) (cons method (doall (map f args))))) | ||
;; (. class-or-instance method & args) | ||
(let [[method & args] more] | ||
(list* '. (f class-or-instance) method (doall (map f args)))))) | ||
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(defn walk-exprs | ||
"A walk function which only traverses valid Clojure expressions. The `predicate` describes | ||
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@@ -206,71 +250,70 @@ | |
The :try-clause? option indicates that a `try` clause is being walked. The special forms | ||
`catch` and `finally` are only special in `try` clauses." | ||
([predicate handler x] | ||
(walk-exprs predicate handler nil x)) | ||
(walk-exprs predicate handler nil x)) | ||
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([predicate handler special-form? x & {:keys [try-clause?]}] | ||
(cmp/with-base-env | ||
(let [x (try | ||
(macroexpand x special-form?) | ||
(catch ClassNotFoundException _ | ||
x)) | ||
walk-exprs' (partial walk-exprs predicate handler special-form?) | ||
x' (cond | ||
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(and (seq? x) (= 'var (first x)) (predicate x)) | ||
(handler (eval x)) | ||
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(and (seq? x) (= 'quote (first x)) (not (predicate x))) | ||
x | ||
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(predicate x) | ||
(handler x) | ||
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(seq? x) | ||
(if (or (and (not try-clause?) | ||
(#{'catch 'finally} (first x))) | ||
(not (contains? special-forms (first x)))) | ||
(doall (map walk-exprs' x)) | ||
((condp = (first x) | ||
'do do-handler | ||
'def def-handler | ||
'fn* fn-handler | ||
'let* let-handler | ||
'loop* let-handler | ||
'letfn* letfn-handler | ||
'case* case-handler | ||
'try try-handler | ||
'catch catch-handler | ||
'reify* reify-handler | ||
'deftype* deftype-handler | ||
'. dot-handler | ||
#(doall (map %1 %2))) | ||
walk-exprs' (special-meta x))) | ||
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(instance? java.util.Map$Entry x) | ||
(clojure.lang.MapEntry. | ||
(walk-exprs' (key x)) | ||
(walk-exprs' (val x))) | ||
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(or | ||
(set? x) | ||
(vector? x)) | ||
(into (empty x) (map walk-exprs' x)) | ||
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(instance? clojure.lang.IRecord x) | ||
x | ||
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(map? x) | ||
(into (empty x) (map walk-exprs' x)) | ||
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;; special case to handle clojure.test | ||
(and (symbol? x) (-> x meta :test)) | ||
(vary-meta x update-in [:test] walk-exprs') | ||
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:else | ||
x)] | ||
(if (instance? clojure.lang.IObj x') | ||
(with-meta x' (merge (meta x) (meta x'))) | ||
x'))))) | ||
(cmp/with-base-env | ||
(let [x (try | ||
(macroexpand x special-form?) | ||
(catch ClassNotFoundException _ | ||
x)) | ||
walk-exprs' (partial walk-exprs predicate handler special-form?) | ||
x' (cond | ||
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(and (head= x 'var) (predicate x)) | ||
(handler (eval x)) | ||
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(and (head= x 'quote) (not (predicate x))) | ||
x | ||
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(predicate x) | ||
(handler x) | ||
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(seq? x) | ||
(if (or (and (not try-clause?) | ||
(#{'catch 'finally} (first x))) | ||
(not (contains? special-forms (first x)))) | ||
(doall (map walk-exprs' x)) | ||
((condp = (first x) | ||
'do do-handler | ||
'def def-handler | ||
'fn* fn-handler | ||
'let* let-handler | ||
'loop* let-handler | ||
'letfn* letfn-handler | ||
'case* case-handler | ||
'try try-handler | ||
'catch catch-handler | ||
'reify* reify-handler | ||
'deftype* deftype-handler | ||
'. dot-handler | ||
#(doall (map %1 %2))) | ||
walk-exprs' (special-meta x))) | ||
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(instance? java.util.Map$Entry x) | ||
(clojure.lang.MapEntry. | ||
(walk-exprs' (key x)) | ||
(walk-exprs' (val x))) | ||
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(or | ||
(set? x) | ||
(vector? x)) | ||
(into (empty x) (map walk-exprs' x)) | ||
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(instance? clojure.lang.IRecord x) | ||
x | ||
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(map? x) | ||
(into (empty x) (map walk-exprs' x)) | ||
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;; special case to handle clojure.test | ||
(and (symbol? x) (-> x meta :test)) | ||
(vary-meta x update-in [:test] walk-exprs') | ||
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:else | ||
x)] | ||
(merge-meta x' (meta x)))))) | ||
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There was a problem hiding this comment. Choose a reason for hiding this commentThe reason will be displayed to describe this comment to others. Learn more. The only change here was to fix the indentation and use the |
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;;; | ||
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This is just a bit of editor config settings for people who use Emacs