fix(es/minifier): Abort array property inliner if the array is used as a ref

crates/swc_ecma_minifier/src/compress/optimize/inline.rs

@@ -104,6 +104,7 @@ impl Optimizer<'_> {
                 && usage.accessed_props.is_empty()
                 && !usage.is_infected()
                 && is_inline_enabled
+                && !usage.used_as_ref
             {
                 if let Expr::Array(arr) = init {
                     if arr.elems.len() < 32

crates/swc_ecma_minifier/tests/fixture/next/46887/input.js

@@ -0,0 +1,158 @@
+
+export var CSL = {};
+
+/*
+ * String parser for XML inputs
+ */
+CSL.parseXml = function (str) {
+
+    var _pos = 0;
+    var _obj = { children: [] };
+    var _stack = [_obj.children];
+
+    function _listifyString(str) {
+        str = str.split(/(?:\r\n|\n|\r)/).join(" ").replace(/>[	 ]+</g, "><").replace(/<\!--.*?-->/g, "");
+        var lst = str.split("><");
+        var stylePos = null;
+        for (var i = 0, ilen = lst.length; i < ilen; i++) {
+            if (i > 0) {
+                lst[i] = "<" + lst[i];
+            }
+            if (i < (lst.length - 1)) {
+                lst[i] = lst[i] + ">";
+            }
+            if ("number" != typeof stylePos) {
+                if (lst[i].slice(0, 7) === "<style " || lst[i].slice(0, 8) == "<locale ") {
+                    stylePos = i;
+                }
+            }
+        }
+        lst = lst.slice(stylePos);
+        // Combine open/close elements for empty terms,
+        // so that they will be passed through correctly
+        // as empty strings.
+        for (var i = lst.length - 2; i > -1; i--) {
+            if (lst[i].slice(1).indexOf("<") === -1) {
+                var stub = lst[i].slice(0, 5);
+                if (lst[i].slice(-2) !== "/>") {
+                    if (stub === "<term") {
+                        if (lst[i + 1].slice(0, 6) === "</term") {
+                            lst[i] = lst[i] + lst[i + 1];
+                            lst = lst.slice(0, i + 1).concat(lst.slice(i + 2));
+                        }
+                    } else if (["<sing", "<mult"].indexOf(stub) > -1) {
+                        if (lst[i].slice(-2) !== "/>" && lst[i + 1].slice(0, 1) === "<") {
+                            lst[i] = lst[i] + lst[i + 1];
+                            lst = lst.slice(0, i + 1).concat(lst.slice(i + 2));
+                        }
+                    }
+                }
+            }
+        }
+        return lst;
+    }
+
+    function _decodeHtmlEntities(str) {
+        return str
+            .split("&amp;").join("&")
+            .split("&quot;").join("\"")
+            .split("&gt;").join(">").split("&lt;").join("<")
+            .replace(/&#([0-9]{1,6});/gi, function (match, numStr) {
+                var num = parseInt(numStr, 10); // read num as normal number
+                return String.fromCharCode(num);
+            })
+            .replace(/&#x([a-f0-9]{1,6});/gi, function (match, numStr) {
+                var num = parseInt(numStr, 16); // read num as hex
+                return String.fromCharCode(num);
+            });
+    }
+
+    function _getAttributes(elem) {
+        var m = elem.match(/([^\'\"=	 ]+)=(?:\"[^\"]*\"|\'[^\']*\')/g);
+        if (m) {
+            for (var i = 0, ilen = m.length; i < ilen; i++) {
+                m[i] = m[i].replace(/=.*/, "");
+            }
+        }
+        return m;
+    }
+
+    function _getAttribute(elem, attr) {
+        var rex = RegExp('^.*[	 ]+' + attr + '=(\"(?:[^\"]*)\"|\'(?:[^\']*)\').*$');
+        var m = elem.match(rex);
+        return m ? m[1].slice(1, -1) : null;
+    }
+
+    function _getTagName(elem) {
+        var rex = RegExp("^<([^	 />]+)");
+        var m = elem.match(rex);
+        return m ? m[1] : null;
+    }
+
+
+    function _castObjectFromOpeningTag(elem) {
+        var obj = {};
+        obj.name = _getTagName(elem);
+        obj.attrs = {};
+        var attributes = _getAttributes(elem);
+        if (attributes) {
+            for (var i = 0, ilen = attributes.length; i < ilen; i++) {
+                var attr = {
+                    name: attributes[i],
+                    value: _getAttribute(elem, attributes[i])
+                }
+                obj.attrs[attr.name] = _decodeHtmlEntities(attr.value);
+            }
+        }
+        obj.children = [];
+        return obj;
+    }
+
+    function _extractTextFromCompositeElement(elem) {
+        var m = elem.match(/^.*>([^<]*)<.*$/);
+        return _decodeHtmlEntities(m[1]);
+    }
+
+    function _appendToChildren(obj) {
+        _stack.slice(-1)[0].push(obj);
+    }
+
+    function _extendStackWithNewChildren(obj) {
+        _stack.push(obj.children);
+    }
+
+    function processElement(elem) {
+        var obj;
+        if (elem.slice(1).indexOf('<') > -1) {
+            // withtext
+            var tag = elem.slice(0, elem.indexOf('>') + 1);
+            obj = _castObjectFromOpeningTag(tag);
+            obj.children = [_extractTextFromCompositeElement(elem)];
+            _appendToChildren(obj);
+        } else if (elem.slice(-2) === '/>') {
+            // singleton
+            obj = _castObjectFromOpeningTag(elem);
+            // Empty term as singleton
+            if (_getTagName(elem) === 'term') {
+                obj.children.push('');
+            }
+            _appendToChildren(obj);
+        } else if (elem.slice(0, 2) === '</') {
+            // close
+            _stack.pop();
+        } else {
+            // open
+            obj = _castObjectFromOpeningTag(elem);
+            _appendToChildren(obj)
+            _extendStackWithNewChildren(obj);
+        }
+    }
+
+    var lst = _listifyString(str);
+
+    for (var i = 0, ilen = lst.length; i < ilen; i++) {
+        var elem = lst[i];
+        processElement(elem);
+    }
+    return _obj.children[0];
+}

crates/swc_ecma_minifier/tests/fixture/next/46887/output.js

@@ -0,0 +1,58 @@
+export var CSL = {};
+CSL.parseXml = function(str) {
+    var _obj_children = [], _stack = [
+        _obj_children
+    ];
+    function _decodeHtmlEntities(str) {
+        return str.split("&amp;").join("&").split("&quot;").join("\"").split("&gt;").join(">").split("&lt;").join("<").replace(/&#([0-9]{1,6});/gi, function(match, numStr) {
+            return String.fromCharCode(parseInt(numStr, 10));
+        }).replace(/&#x([a-f0-9]{1,6});/gi, function(match, numStr) {
+            return String.fromCharCode(parseInt(numStr, 16));
+        });
+    }
+    function _getTagName(elem) {
+        var rex = RegExp("^<([^	 />]+)"), m = elem.match(rex);
+        return m ? m[1] : null;
+    }
+    function _castObjectFromOpeningTag(elem) {
+        var obj = {};
+        obj.name = _getTagName(elem), obj.attrs = {};
+        var attributes = function(elem) {
+            var m = elem.match(/([^\'\"=	 ]+)=(?:\"[^\"]*\"|\'[^\']*\')/g);
+            if (m) for(var i = 0, ilen = m.length; i < ilen; i++)m[i] = m[i].replace(/=.*/, "");
+            return m;
+        }(elem);
+        if (attributes) for(var i = 0, ilen = attributes.length; i < ilen; i++){
+            var attr = {
+                name: attributes[i],
+                value: function(elem, attr) {
+                    var rex = RegExp('^.*[	 ]+' + attr + '=(\"(?:[^\"]*)\"|\'(?:[^\']*)\').*$'), m = elem.match(rex);
+                    return m ? m[1].slice(1, -1) : null;
+                }(elem, attributes[i])
+            };
+            obj.attrs[attr.name] = _decodeHtmlEntities(attr.value);
+        }
+        return obj.children = [], obj;
+    }
+    function _appendToChildren(obj) {
+        _stack.slice(-1)[0].push(obj);
+    }
+    for(var lst = function(str) {
+        for(var lst = (str = str.split(/(?:\r\n|\n|\r)/).join(" ").replace(/>[	 ]+</g, "><").replace(/<\!--.*?-->/g, "")).split("><"), stylePos = null, i = 0, ilen = lst.length; i < ilen; i++)i > 0 && (lst[i] = "<" + lst[i]), i < lst.length - 1 && (lst[i] = lst[i] + ">"), "number" != typeof stylePos && ("<style " === lst[i].slice(0, 7) || "<locale " == lst[i].slice(0, 8)) && (stylePos = i);
+        lst = lst.slice(stylePos);
+        for(var i = lst.length - 2; i > -1; i--)if (-1 === lst[i].slice(1).indexOf("<")) {
+            var stub = lst[i].slice(0, 5);
+            "/>" !== lst[i].slice(-2) && ("<term" === stub ? "</term" === lst[i + 1].slice(0, 6) && (lst[i] = lst[i] + lst[i + 1], lst = lst.slice(0, i + 1).concat(lst.slice(i + 2))) : [
+                "<sing",
+                "<mult"
+            ].indexOf(stub) > -1 && "/>" !== lst[i].slice(-2) && "<" === lst[i + 1].slice(0, 1) && (lst[i] = lst[i] + lst[i + 1], lst = lst.slice(0, i + 1).concat(lst.slice(i + 2))));
+        }
+        return lst;
+    }(str), i = 0, ilen = lst.length; i < ilen; i++)!function(elem) {
+        var obj, obj1;
+        elem.slice(1).indexOf('<') > -1 ? ((obj = _castObjectFromOpeningTag(elem.slice(0, elem.indexOf('>') + 1))).children = [
+            _decodeHtmlEntities(elem.match(/^.*>([^<]*)<.*$/)[1])
+        ], _appendToChildren(obj)) : '/>' === elem.slice(-2) ? (obj = _castObjectFromOpeningTag(elem), 'term' === _getTagName(elem) && obj.children.push(''), _appendToChildren(obj)) : '</' === elem.slice(0, 2) ? _stack.pop() : (_appendToChildren(obj = _castObjectFromOpeningTag(elem)), obj1 = obj, _stack.push(obj1.children));
+    }(lst[i]);
+    return _obj_children[0];
+};

crates/swc_ecma_usage_analyzer/src/analyzer/mod.rs

@@ -217,6 +217,14 @@ where
 {
     noop_visit_type!();
 
+    fn visit_array_lit(&mut self, n: &ArrayLit) {
+        let ctx = Ctx {
+            is_id_ref: true,
+            ..self.ctx
+        };
+        n.visit_children_with(&mut *self.with_ctx(ctx));
+    }
+
     #[cfg_attr(feature = "debug", tracing::instrument(skip_all))]
     fn visit_arrow_expr(&mut self, n: &ArrowExpr) {
         self.with_child(n.span.ctxt, ScopeKind::Fn, |child| {