added make browserlist(autoprefixer) work fixed

1 files changed, 1886 insertions, 0 deletions

diff --git a/node_modules/terser/lib/mozilla-ast.js b/node_modules/terser/lib/mozilla-ast.js
new file mode 100644
index 00000000..5e3c7209
--- /dev/null
+++ b/node_modules/terser/lib/mozilla-ast.js
@@ -0,0 +1,1886 @@
+/***********************************************************************
+
+  A JavaScript tokenizer / parser / beautifier / compressor.
+  https://github.com/mishoo/UglifyJS2
+
+  -------------------------------- (C) ---------------------------------
+
+                           Author: Mihai Bazon
+                         <mihai.bazon@gmail.com>
+                       http://mihai.bazon.net/blog
+
+  Distributed under the BSD license:
+
+    Copyright 2012 (c) Mihai Bazon <mihai.bazon@gmail.com>
+
+    Redistribution and use in source and binary forms, with or without
+    modification, are permitted provided that the following conditions
+    are met:
+
+        * Redistributions of source code must retain the above
+          copyright notice, this list of conditions and the following
+          disclaimer.
+
+        * Redistributions in binary form must reproduce the above
+          copyright notice, this list of conditions and the following
+          disclaimer in the documentation and/or other materials
+          provided with the distribution.
+
+    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER “AS IS” AND ANY
+    EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+    IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+    PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER BE
+    LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
+    OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+    PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+    PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+    THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
+    TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
+    THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+    SUCH DAMAGE.
+
+ ***********************************************************************/
+
+import { make_node } from "./utils/index.js";
+import {
+    AST_Accessor,
+    AST_Array,
+    AST_Arrow,
+    AST_Assign,
+    AST_Atom,
+    AST_Await,
+    AST_BigInt,
+    AST_Binary,
+    AST_Block,
+    AST_BlockStatement,
+    AST_Boolean,
+    AST_Break,
+    AST_Call,
+    AST_Case,
+    AST_Catch,
+    AST_Chain,
+    AST_Class,
+    AST_ClassStaticBlock,
+    AST_ClassExpression,
+    AST_ClassProperty,
+    AST_ClassPrivateProperty,
+    AST_ConciseMethod,
+    AST_Conditional,
+    AST_Const,
+    AST_Constant,
+    AST_Continue,
+    AST_Debugger,
+    AST_Default,
+    AST_DefaultAssign,
+    AST_DefClass,
+    AST_Definitions,
+    AST_Defun,
+    AST_Destructuring,
+    AST_Directive,
+    AST_Do,
+    AST_Dot,
+    AST_DotHash,
+    AST_EmptyStatement,
+    AST_Expansion,
+    AST_Export,
+    AST_False,
+    AST_Finally,
+    AST_For,
+    AST_ForIn,
+    AST_ForOf,
+    AST_Function,
+    AST_Hole,
+    AST_If,
+    AST_Import,
+    AST_ImportMeta,
+    AST_Label,
+    AST_LabeledStatement,
+    AST_LabelRef,
+    AST_Lambda,
+    AST_Let,
+    AST_NameMapping,
+    AST_New,
+    AST_NewTarget,
+    AST_Node,
+    AST_Null,
+    AST_Number,
+    AST_Object,
+    AST_ObjectGetter,
+    AST_ObjectKeyVal,
+    AST_ObjectProperty,
+    AST_ObjectSetter,
+    AST_PrefixedTemplateString,
+    AST_PrivateGetter,
+    AST_PrivateMethod,
+    AST_PrivateSetter,
+    AST_PrivateIn,
+    AST_PropAccess,
+    AST_RegExp,
+    AST_Return,
+    AST_Sequence,
+    AST_SimpleStatement,
+    AST_Statement,
+    AST_String,
+    AST_Sub,
+    AST_Super,
+    AST_Switch,
+    AST_SwitchBranch,
+    AST_Symbol,
+    AST_SymbolCatch,
+    AST_SymbolClass,
+    AST_SymbolClassProperty,
+    AST_SymbolPrivateProperty,
+    AST_SymbolConst,
+    AST_SymbolDefClass,
+    AST_SymbolDefun,
+    AST_SymbolExport,
+    AST_SymbolExportForeign,
+    AST_SymbolFunarg,
+    AST_SymbolImport,
+    AST_SymbolImportForeign,
+    AST_SymbolLambda,
+    AST_SymbolLet,
+    AST_SymbolMethod,
+    AST_SymbolRef,
+    AST_SymbolVar,
+    AST_TemplateSegment,
+    AST_TemplateString,
+    AST_This,
+    AST_Throw,
+    AST_Token,
+    AST_Toplevel,
+    AST_True,
+    AST_Try,
+    AST_TryBlock,
+    AST_Unary,
+    AST_UnaryPostfix,
+    AST_UnaryPrefix,
+    AST_Var,
+    AST_VarDef,
+    AST_While,
+    AST_With,
+    AST_Yield,
+} from "./ast.js";
+import { is_basic_identifier_string } from "./parse.js";
+
+(function() {
+
+    var normalize_directives = function(body) {
+        for (var i = 0; i < body.length; i++) {
+            if (body[i] instanceof AST_Statement && body[i].body instanceof AST_String) {
+                body[i] = new AST_Directive({
+                    start: body[i].start,
+                    end: body[i].end,
+                    value: body[i].body.value
+                });
+            } else {
+                return body;
+            }
+        }
+
+        return body;
+    };
+
+    const assert_clause_from_moz = (assertions) => {
+        if (assertions && assertions.length > 0) {
+            return new AST_Object({
+                start: my_start_token(assertions),
+                end: my_end_token(assertions),
+                properties: assertions.map((assertion_kv) =>
+                    new AST_ObjectKeyVal({
+                        start: my_start_token(assertion_kv),
+                        end: my_end_token(assertion_kv),
+                        key: assertion_kv.key.name || assertion_kv.key.value,
+                        value: from_moz(assertion_kv.value)
+                    })
+                )
+            });
+        }
+        return null;
+    };
+
+    var MOZ_TO_ME = {
+        Program: function(M) {
+            return new AST_Toplevel({
+                start: my_start_token(M),
+                end: my_end_token(M),
+                body: normalize_directives(M.body.map(from_moz))
+            });
+        },
+
+        ArrayPattern: function(M) {
+            return new AST_Destructuring({
+                start: my_start_token(M),
+                end: my_end_token(M),
+                names: M.elements.map(function(elm) {
+                    if (elm === null) {
+                        return new AST_Hole();
+                    }
+                    return from_moz(elm);
+                }),
+                is_array: true
+            });
+        },
+
+        ObjectPattern: function(M) {
+            return new AST_Destructuring({
+                start: my_start_token(M),
+                end: my_end_token(M),
+                names: M.properties.map(from_moz),
+                is_array: false
+            });
+        },
+
+        AssignmentPattern: function(M) {
+            return new AST_DefaultAssign({
+                start: my_start_token(M),
+                end: my_end_token(M),
+                left: from_moz(M.left),
+                operator: "=",
+                right: from_moz(M.right)
+            });
+        },
+
+        SpreadElement: function(M) {
+            return new AST_Expansion({
+                start: my_start_token(M),
+                end: my_end_token(M),
+                expression: from_moz(M.argument)
+            });
+        },
+
+        RestElement: function(M) {
+            return new AST_Expansion({
+                start: my_start_token(M),
+                end: my_end_token(M),
+                expression: from_moz(M.argument)
+            });
+        },
+
+        TemplateElement: function(M) {
+            return new AST_TemplateSegment({
+                start: my_start_token(M),
+                end: my_end_token(M),
+                value: M.value.cooked,
+                raw: M.value.raw
+            });
+        },
+
+        TemplateLiteral: function(M) {
+            var segments = [];
+            for (var i = 0; i < M.quasis.length; i++) {
+                segments.push(from_moz(M.quasis[i]));
+                if (M.expressions[i]) {
+                    segments.push(from_moz(M.expressions[i]));
+                }
+            }
+            return new AST_TemplateString({
+                start: my_start_token(M),
+                end: my_end_token(M),
+                segments: segments
+            });
+        },
+
+        TaggedTemplateExpression: function(M) {
+            return new AST_PrefixedTemplateString({
+                start: my_start_token(M),
+                end: my_end_token(M),
+                template_string: from_moz(M.quasi),
+                prefix: from_moz(M.tag)
+            });
+        },
+
+        FunctionDeclaration: function(M) {
+            return new AST_Defun({
+                start: my_start_token(M),
+                end: my_end_token(M),
+                name: from_moz(M.id),
+                argnames: M.params.map(from_moz),
+                is_generator: M.generator,
+                async: M.async,
+                body: normalize_directives(from_moz(M.body).body)
+            });
+        },
+
+        FunctionExpression: function(M) {
+            return new AST_Function({
+                start: my_start_token(M),
+                end: my_end_token(M),
+                name: from_moz(M.id),
+                argnames: M.params.map(from_moz),
+                is_generator: M.generator,
+                async: M.async,
+                body: normalize_directives(from_moz(M.body).body)
+            });
+        },
+
+        ArrowFunctionExpression: function(M) {
+            const body = M.body.type === "BlockStatement"
+                ? from_moz(M.body).body
+                : [make_node(AST_Return, {}, { value: from_moz(M.body) })];
+            return new AST_Arrow({
+                start: my_start_token(M),
+                end: my_end_token(M),
+                argnames: M.params.map(from_moz),
+                body,
+                async: M.async,
+            });
+        },
+
+        ExpressionStatement: function(M) {
+            return new AST_SimpleStatement({
+                start: my_start_token(M),
+                end: my_end_token(M),
+                body: from_moz(M.expression)
+            });
+        },
+
+        TryStatement: function(M) {
+            var handlers = M.handlers || [M.handler];
+            if (handlers.length > 1 || M.guardedHandlers && M.guardedHandlers.length) {
+                throw new Error("Multiple catch clauses are not supported.");
+            }
+            return new AST_Try({
+                start    : my_start_token(M),
+                end      : my_end_token(M),
+                body     : new AST_TryBlock(from_moz(M.block)),
+                bcatch   : from_moz(handlers[0]),
+                bfinally : M.finalizer ? new AST_Finally(from_moz(M.finalizer)) : null
+            });
+        },
+
+        Property: function(M) {
+            var key = M.key;
+            var args = {
+                start    : my_start_token(key || M.value),
+                end      : my_end_token(M.value),
+                key      : key.type == "Identifier" ? key.name : key.value,
+                value    : from_moz(M.value)
+            };
+            if (M.computed) {
+                args.key = from_moz(M.key);
+            }
+            if (M.method) {
+                args.is_generator = M.value.generator;
+                args.async = M.value.async;
+                if (!M.computed) {
+                    args.key = new AST_SymbolMethod({ name: args.key });
+                } else {
+                    args.key = from_moz(M.key);
+                }
+                return new AST_ConciseMethod(args);
+            }
+            if (M.kind == "init") {
+                if (key.type != "Identifier" && key.type != "Literal") {
+                    args.key = from_moz(key);
+                }
+                return new AST_ObjectKeyVal(args);
+            }
+            if (typeof args.key === "string" || typeof args.key === "number") {
+                args.key = new AST_SymbolMethod({
+                    name: args.key
+                });
+            }
+            args.value = new AST_Accessor(args.value);
+            if (M.kind == "get") return new AST_ObjectGetter(args);
+            if (M.kind == "set") return new AST_ObjectSetter(args);
+            if (M.kind == "method") {
+                args.async = M.value.async;
+                args.is_generator = M.value.generator;
+                args.quote = M.computed ? "\"" : null;
+                return new AST_ConciseMethod(args);
+            }
+        },
+
+        MethodDefinition: function(M) {
+            const is_private = M.key.type === "PrivateIdentifier";
+            const key = M.computed ? from_moz(M.key) : new AST_SymbolMethod({ name: M.key.name || M.key.value });
+
+            var args = {
+                start    : my_start_token(M),
+                end      : my_end_token(M),
+                key,
+                value    : from_moz(M.value),
+                static   : M.static,
+            };
+            if (M.kind == "get") {
+                return new (is_private ? AST_PrivateGetter : AST_ObjectGetter)(args);
+            }
+            if (M.kind == "set") {
+                return new (is_private ? AST_PrivateSetter : AST_ObjectSetter)(args);
+            }
+            args.is_generator = M.value.generator;
+            args.async = M.value.async;
+            return new (is_private ? AST_PrivateMethod : AST_ConciseMethod)(args);
+        },
+
+        FieldDefinition: function(M) {
+            let key;
+            if (M.computed) {
+                key = from_moz(M.key);
+            } else {
+                if (M.key.type !== "Identifier") throw new Error("Non-Identifier key in FieldDefinition");
+                key = from_moz(M.key);
+            }
+            return new AST_ClassProperty({
+                start    : my_start_token(M),
+                end      : my_end_token(M),
+                key,
+                value    : from_moz(M.value),
+                static   : M.static,
+            });
+        },
+
+        PropertyDefinition: function(M) {
+            let key;
+            if (M.computed) {
+                key = from_moz(M.key);
+            } else if (M.key.type === "PrivateIdentifier") {
+                return new AST_ClassPrivateProperty({
+                    start    : my_start_token(M),
+                    end      : my_end_token(M),
+                    key      : from_moz(M.key),
+                    value    : from_moz(M.value),
+                    static   : M.static,
+                });
+            } else {
+                if (M.key.type !== "Identifier") {
+                    throw new Error("Non-Identifier key in PropertyDefinition");
+                }
+                key = from_moz(M.key);
+            }
+
+            return new AST_ClassProperty({
+                start    : my_start_token(M),
+                end      : my_end_token(M),
+                key,
+                value    : from_moz(M.value),
+                static   : M.static,
+            });
+        },
+
+        PrivateIdentifier: function (M) {
+            return new AST_SymbolPrivateProperty({
+                start: my_start_token(M),
+                end: my_end_token(M),
+                name: M.name
+            });
+        },
+
+        StaticBlock: function(M) {
+            return new AST_ClassStaticBlock({
+                start : my_start_token(M),
+                end   : my_end_token(M),
+                body  : M.body.map(from_moz),
+            });
+        },
+
+        ArrayExpression: function(M) {
+            return new AST_Array({
+                start    : my_start_token(M),
+                end      : my_end_token(M),
+                elements : M.elements.map(function(elem) {
+                    return elem === null ? new AST_Hole() : from_moz(elem);
+                })
+            });
+        },
+
+        ObjectExpression: function(M) {
+            return new AST_Object({
+                start      : my_start_token(M),
+                end        : my_end_token(M),
+                properties : M.properties.map(function(prop) {
+                    if (prop.type === "SpreadElement") {
+                        return from_moz(prop);
+                    }
+                    prop.type = "Property";
+                    return from_moz(prop);
+                })
+            });
+        },
+
+        SequenceExpression: function(M) {
+            return new AST_Sequence({
+                start      : my_start_token(M),
+                end        : my_end_token(M),
+                expressions: M.expressions.map(from_moz)
+            });
+        },
+
+        MemberExpression: function(M) {
+            if (M.property.type === "PrivateIdentifier") {
+                return new AST_DotHash({
+                    start      : my_start_token(M),
+                    end        : my_end_token(M),
+                    property   : M.property.name,
+                    expression : from_moz(M.object),
+                    optional   : M.optional || false
+                });
+            }
+            return new (M.computed ? AST_Sub : AST_Dot)({
+                start      : my_start_token(M),
+                end        : my_end_token(M),
+                property   : M.computed ? from_moz(M.property) : M.property.name,
+                expression : from_moz(M.object),
+                optional   : M.optional || false
+            });
+        },
+
+        ChainExpression: function(M) {
+            return new AST_Chain({
+                start      : my_start_token(M),
+                end        : my_end_token(M),
+                expression : from_moz(M.expression)
+            });
+        },
+
+        SwitchCase: function(M) {
+            return new (M.test ? AST_Case : AST_Default)({
+                start      : my_start_token(M),
+                end        : my_end_token(M),
+                expression : from_moz(M.test),
+                body       : M.consequent.map(from_moz)
+            });
+        },
+
+        VariableDeclaration: function(M) {
+            return new (M.kind === "const" ? AST_Const :
+                        M.kind === "let" ? AST_Let : AST_Var)({
+                start       : my_start_token(M),
+                end         : my_end_token(M),
+                definitions : M.declarations.map(from_moz)
+            });
+        },
+
+        ImportDeclaration: function(M) {
+            var imported_name = null;
+            var imported_names = null;
+            M.specifiers.forEach(function (specifier) {
+                if (specifier.type === "ImportSpecifier" || specifier.type === "ImportNamespaceSpecifier") {
+                    if (!imported_names) { imported_names = []; }
+                    imported_names.push(from_moz(specifier));
+                } else if (specifier.type === "ImportDefaultSpecifier") {
+                    imported_name = from_moz(specifier);
+                }
+            });
+            return new AST_Import({
+                start       : my_start_token(M),
+                end         : my_end_token(M),
+                imported_name: imported_name,
+                imported_names : imported_names,
+                module_name : from_moz(M.source),
+                assert_clause: assert_clause_from_moz(M.assertions)
+            });
+        },
+
+        ImportSpecifier: function(M) {
+            return new AST_NameMapping({
+                start: my_start_token(M),
+                end: my_end_token(M),
+                foreign_name: from_moz(M.imported),
+                name: from_moz(M.local)
+            });
+        },
+
+        ImportDefaultSpecifier: function(M) {
+            return from_moz(M.local);
+        },
+
+        ImportNamespaceSpecifier: function(M) {
+            return new AST_NameMapping({
+                start: my_start_token(M),
+                end: my_end_token(M),
+                foreign_name: new AST_SymbolImportForeign({ name: "*" }),
+                name: from_moz(M.local)
+            });
+        },
+
+        ExportAllDeclaration: function(M) {
+            var foreign_name = M.exported == null ? 
+                new AST_SymbolExportForeign({ name: "*" }) :
+                from_moz(M.exported);
+            return new AST_Export({
+                start: my_start_token(M),
+                end: my_end_token(M),
+                exported_names: [
+                    new AST_NameMapping({
+                        name: new AST_SymbolExportForeign({ name: "*" }),
+                        foreign_name: foreign_name
+                    })
+                ],
+                module_name: from_moz(M.source),
+                assert_clause: assert_clause_from_moz(M.assertions)
+            });
+        },
+
+        ExportNamedDeclaration: function(M) {
+            return new AST_Export({
+                start: my_start_token(M),
+                end: my_end_token(M),
+                exported_definition: from_moz(M.declaration),
+                exported_names: M.specifiers && M.specifiers.length ? M.specifiers.map(function (specifier) {
+                    return from_moz(specifier);
+                }) : null,
+                module_name: from_moz(M.source),
+                assert_clause: assert_clause_from_moz(M.assertions)
+            });
+        },
+
+        ExportDefaultDeclaration: function(M) {
+            return new AST_Export({
+                start: my_start_token(M),
+                end: my_end_token(M),
+                exported_value: from_moz(M.declaration),
+                is_default: true
+            });
+        },
+
+        ExportSpecifier: function(M) {
+            return new AST_NameMapping({
+                foreign_name: from_moz(M.exported),
+                name: from_moz(M.local)
+            });
+        },
+
+        Literal: function(M) {
+            var val = M.value, args = {
+                start  : my_start_token(M),
+                end    : my_end_token(M)
+            };
+            var rx = M.regex;
+            if (rx && rx.pattern) {
+                // RegExpLiteral as per ESTree AST spec
+                args.value = {
+                    source: rx.pattern,
+                    flags: rx.flags
+                };
+                return new AST_RegExp(args);
+            } else if (rx) {
+                // support legacy RegExp
+                const rx_source = M.raw || val;
+                const match = rx_source.match(/^\/(.*)\/(\w*)$/);
+                if (!match) throw new Error("Invalid regex source " + rx_source);
+                const [_, source, flags] = match;
+                args.value = { source, flags };
+                return new AST_RegExp(args);
+            }
+            if (val === null) return new AST_Null(args);
+            switch (typeof val) {
+              case "string":
+                args.quote = "\"";
+                var p = FROM_MOZ_STACK[FROM_MOZ_STACK.length - 2];
+                if (p.type == "ImportSpecifier") {
+                    args.name = val;
+                    return new AST_SymbolImportForeign(args);
+                } else if (p.type == "ExportSpecifier") {
+                    args.name = val;
+                    if (M == p.exported) {
+                        return new AST_SymbolExportForeign(args);
+                    } else {
+                        return new AST_SymbolExport(args);
+                    }
+                } else if (p.type == "ExportAllDeclaration" && M == p.exported) {
+                    args.name = val;
+                    return new AST_SymbolExportForeign(args);
+                }
+                args.value = val;
+                return new AST_String(args);
+              case "number":
+                args.value = val;
+                args.raw = M.raw || val.toString();
+                return new AST_Number(args);
+              case "boolean":
+                return new (val ? AST_True : AST_False)(args);
+            }
+        },
+
+        MetaProperty: function(M) {
+            if (M.meta.name === "new" && M.property.name === "target") {
+                return new AST_NewTarget({
+                    start: my_start_token(M),
+                    end: my_end_token(M)
+                });
+            } else if (M.meta.name === "import" && M.property.name === "meta") {
+                return new AST_ImportMeta({
+                    start: my_start_token(M),
+                    end: my_end_token(M)
+                });
+            }
+        },
+
+        Identifier: function(M) {
+            var p = FROM_MOZ_STACK[FROM_MOZ_STACK.length - 2];
+            return new (  p.type == "LabeledStatement" ? AST_Label
+                        : p.type == "VariableDeclarator" && p.id === M ? (p.kind == "const" ? AST_SymbolConst : p.kind == "let" ? AST_SymbolLet : AST_SymbolVar)
+                        : /Import.*Specifier/.test(p.type) ? (p.local === M ? AST_SymbolImport : AST_SymbolImportForeign)
+                        : p.type == "ExportSpecifier" ? (p.local === M ? AST_SymbolExport : AST_SymbolExportForeign)
+                        : p.type == "FunctionExpression" ? (p.id === M ? AST_SymbolLambda : AST_SymbolFunarg)
+                        : p.type == "FunctionDeclaration" ? (p.id === M ? AST_SymbolDefun : AST_SymbolFunarg)
+                        : p.type == "ArrowFunctionExpression" ? (p.params.includes(M)) ? AST_SymbolFunarg : AST_SymbolRef
+                        : p.type == "ClassExpression" ? (p.id === M ? AST_SymbolClass : AST_SymbolRef)
+                        : p.type == "Property" ? (p.key === M && p.computed || p.value === M ? AST_SymbolRef : AST_SymbolMethod)
+                        : p.type == "PropertyDefinition" || p.type === "FieldDefinition" ? (p.key === M && p.computed || p.value === M ? AST_SymbolRef : AST_SymbolClassProperty)
+                        : p.type == "ClassDeclaration" ? (p.id === M ? AST_SymbolDefClass : AST_SymbolRef)
+                        : p.type == "MethodDefinition" ? (p.computed ? AST_SymbolRef : AST_SymbolMethod)
+                        : p.type == "CatchClause" ? AST_SymbolCatch
+                        : p.type == "BreakStatement" || p.type == "ContinueStatement" ? AST_LabelRef
+                        : AST_SymbolRef)({
+                            start : my_start_token(M),
+                            end   : my_end_token(M),
+                            name  : M.name
+                        });
+        },
+
+        BigIntLiteral(M) {
+            return new AST_BigInt({
+                start : my_start_token(M),
+                end   : my_end_token(M),
+                value : M.value
+            });
+        },
+
+        EmptyStatement: function(M) {
+            return new AST_EmptyStatement({
+                start: my_start_token(M),
+                end: my_end_token(M)
+            });
+        },
+
+        BlockStatement: function(M) {
+            return new AST_BlockStatement({
+                start: my_start_token(M),
+                end: my_end_token(M),
+                body: M.body.map(from_moz)
+            });
+        },
+
+        IfStatement: function(M) {
+            return new AST_If({
+                start: my_start_token(M),
+                end: my_end_token(M),
+                condition: from_moz(M.test),
+                body: from_moz(M.consequent),
+                alternative: from_moz(M.alternate)
+            });
+        },
+
+        LabeledStatement: function(M) {
+            return new AST_LabeledStatement({
+                start: my_start_token(M),
+                end: my_end_token(M),
+                label: from_moz(M.label),
+                body: from_moz(M.body)
+            });
+        },
+
+        BreakStatement: function(M) {
+            return new AST_Break({
+                start: my_start_token(M),
+                end: my_end_token(M),
+                label: from_moz(M.label)
+            });
+        },
+
+        ContinueStatement: function(M) {
+            return new AST_Continue({
+                start: my_start_token(M),
+                end: my_end_token(M),
+                label: from_moz(M.label)
+            });
+        },
+
+        WithStatement: function(M) {
+            return new AST_With({
+                start: my_start_token(M),
+                end: my_end_token(M),
+                expression: from_moz(M.object),
+                body: from_moz(M.body)
+            });
+        },
+
+        SwitchStatement: function(M) {
+            return new AST_Switch({
+                start: my_start_token(M),
+                end: my_end_token(M),
+                expression: from_moz(M.discriminant),
+                body: M.cases.map(from_moz)
+            });
+        },
+
+        ReturnStatement: function(M) {
+            return new AST_Return({
+                start: my_start_token(M),
+                end: my_end_token(M),
+                value: from_moz(M.argument)
+            });
+        },
+
+        ThrowStatement: function(M) {
+            return new AST_Throw({
+                start: my_start_token(M),
+                end: my_end_token(M),
+                value: from_moz(M.argument)
+            });
+        },
+
+        WhileStatement: function(M) {
+            return new AST_While({
+                start: my_start_token(M),
+                end: my_end_token(M),
+                condition: from_moz(M.test),
+                body: from_moz(M.body)
+            });
+        },
+
+        DoWhileStatement: function(M) {
+            return new AST_Do({
+                start: my_start_token(M),
+                end: my_end_token(M),
+                condition: from_moz(M.test),
+                body: from_moz(M.body)
+            });
+        },
+
+        ForStatement: function(M) {
+            return new AST_For({
+                start: my_start_token(M),
+                end: my_end_token(M),
+                init: from_moz(M.init),
+                condition: from_moz(M.test),
+                step: from_moz(M.update),
+                body: from_moz(M.body)
+            });
+        },
+
+        ForInStatement: function(M) {
+            return new AST_ForIn({
+                start: my_start_token(M),
+                end: my_end_token(M),
+                init: from_moz(M.left),
+                object: from_moz(M.right),
+                body: from_moz(M.body)
+            });
+        },
+
+        ForOfStatement: function(M) {
+            return new AST_ForOf({
+                start: my_start_token(M),
+                end: my_end_token(M),
+                init: from_moz(M.left),
+                object: from_moz(M.right),
+                body: from_moz(M.body),
+                await: M.await
+            });
+        },
+
+        AwaitExpression: function(M) {
+            return new AST_Await({
+                start: my_start_token(M),
+                end: my_end_token(M),
+                expression: from_moz(M.argument)
+            });
+        },
+
+        YieldExpression: function(M) {
+            return new AST_Yield({
+                start: my_start_token(M),
+                end: my_end_token(M),
+                expression: from_moz(M.argument),
+                is_star: M.delegate
+            });
+        },
+
+        DebuggerStatement: function(M) {
+            return new AST_Debugger({
+                start: my_start_token(M),
+                end: my_end_token(M)
+            });
+        },
+
+        VariableDeclarator: function(M) {
+            return new AST_VarDef({
+                start: my_start_token(M),
+                end: my_end_token(M),
+                name: from_moz(M.id),
+                value: from_moz(M.init)
+            });
+        },
+
+        CatchClause: function(M) {
+            return new AST_Catch({
+                start: my_start_token(M),
+                end: my_end_token(M),
+                argname: from_moz(M.param),
+                body: from_moz(M.body).body
+            });
+        },
+
+        ThisExpression: function(M) {
+            return new AST_This({
+                start: my_start_token(M),
+                end: my_end_token(M)
+            });
+        },
+
+        Super: function(M) {
+            return new AST_Super({
+                start: my_start_token(M),
+                end: my_end_token(M)
+            });
+        },
+
+        BinaryExpression: function(M) {
+            if (M.left.type === "PrivateIdentifier") {
+                return new AST_PrivateIn({
+                    start: my_start_token(M),
+                    end: my_end_token(M),
+                    key: new AST_SymbolPrivateProperty({
+                        start: my_start_token(M.left),
+                        end: my_end_token(M.left),
+                        name: M.left.name
+                    }),
+                    value: from_moz(M.right),
+                });
+            }
+            return new AST_Binary({
+                start: my_start_token(M),
+                end: my_end_token(M),
+                operator: M.operator,
+                left: from_moz(M.left),
+                right: from_moz(M.right)
+            });
+        },
+
+        LogicalExpression: function(M) {
+            return new AST_Binary({
+                start: my_start_token(M),
+                end: my_end_token(M),
+                operator: M.operator,
+                left: from_moz(M.left),
+                right: from_moz(M.right)
+            });
+        },
+
+        AssignmentExpression: function(M) {
+            return new AST_Assign({
+                start: my_start_token(M),
+                end: my_end_token(M),
+                operator: M.operator,
+                left: from_moz(M.left),
+                right: from_moz(M.right)
+            });
+        },
+
+        ConditionalExpression: function(M) {
+            return new AST_Conditional({
+                start: my_start_token(M),
+                end: my_end_token(M),
+                condition: from_moz(M.test),
+                consequent: from_moz(M.consequent),
+                alternative: from_moz(M.alternate)
+            });
+        },
+
+        NewExpression: function(M) {
+            return new AST_New({
+                start: my_start_token(M),
+                end: my_end_token(M),
+                expression: from_moz(M.callee),
+                args: M.arguments.map(from_moz)
+            });
+        },
+
+        CallExpression: function(M) {
+            return new AST_Call({
+                start: my_start_token(M),
+                end: my_end_token(M),
+                expression: from_moz(M.callee),
+                optional: M.optional,
+                args: M.arguments.map(from_moz)
+            });
+        }
+    };
+
+    MOZ_TO_ME.UpdateExpression =
+    MOZ_TO_ME.UnaryExpression = function To_Moz_Unary(M) {
+        var prefix = "prefix" in M ? M.prefix
+            : M.type == "UnaryExpression" ? true : false;
+        return new (prefix ? AST_UnaryPrefix : AST_UnaryPostfix)({
+            start      : my_start_token(M),
+            end        : my_end_token(M),
+            operator   : M.operator,
+            expression : from_moz(M.argument)
+        });
+    };
+
+    MOZ_TO_ME.ClassDeclaration =
+    MOZ_TO_ME.ClassExpression = function From_Moz_Class(M) {
+        return new (M.type === "ClassDeclaration" ? AST_DefClass : AST_ClassExpression)({
+            start    : my_start_token(M),
+            end      : my_end_token(M),
+            name     : from_moz(M.id),
+            extends  : from_moz(M.superClass),
+            properties: M.body.body.map(from_moz)
+        });
+    };
+
+    def_to_moz(AST_EmptyStatement, function To_Moz_EmptyStatement() {
+        return {
+            type: "EmptyStatement"
+        };
+    });
+    def_to_moz(AST_BlockStatement, function To_Moz_BlockStatement(M) {
+        return {
+            type: "BlockStatement",
+            body: M.body.map(to_moz)
+        };
+    });
+    def_to_moz(AST_If, function To_Moz_IfStatement(M) {
+        return {
+            type: "IfStatement",
+            test: to_moz(M.condition),
+            consequent: to_moz(M.body),
+            alternate: to_moz(M.alternative)
+        };
+    });
+    def_to_moz(AST_LabeledStatement, function To_Moz_LabeledStatement(M) {
+        return {
+            type: "LabeledStatement",
+            label: to_moz(M.label),
+            body: to_moz(M.body)
+        };
+    });
+    def_to_moz(AST_Break, function To_Moz_BreakStatement(M) {
+        return {
+            type: "BreakStatement",
+            label: to_moz(M.label)
+        };
+    });
+    def_to_moz(AST_Continue, function To_Moz_ContinueStatement(M) {
+        return {
+            type: "ContinueStatement",
+            label: to_moz(M.label)
+        };
+    });
+    def_to_moz(AST_With, function To_Moz_WithStatement(M) {
+        return {
+            type: "WithStatement",
+            object: to_moz(M.expression),
+            body: to_moz(M.body)
+        };
+    });
+    def_to_moz(AST_Switch, function To_Moz_SwitchStatement(M) {
+        return {
+            type: "SwitchStatement",
+            discriminant: to_moz(M.expression),
+            cases: M.body.map(to_moz)
+        };
+    });
+    def_to_moz(AST_Return, function To_Moz_ReturnStatement(M) {
+        return {
+            type: "ReturnStatement",
+            argument: to_moz(M.value)
+        };
+    });
+    def_to_moz(AST_Throw, function To_Moz_ThrowStatement(M) {
+        return {
+            type: "ThrowStatement",
+            argument: to_moz(M.value)
+        };
+    });
+    def_to_moz(AST_While, function To_Moz_WhileStatement(M) {
+        return {
+            type: "WhileStatement",
+            test: to_moz(M.condition),
+            body: to_moz(M.body)
+        };
+    });
+    def_to_moz(AST_Do, function To_Moz_DoWhileStatement(M) {
+        return {
+            type: "DoWhileStatement",
+            test: to_moz(M.condition),
+            body: to_moz(M.body)
+        };
+    });
+    def_to_moz(AST_For, function To_Moz_ForStatement(M) {
+        return {
+            type: "ForStatement",
+            init: to_moz(M.init),
+            test: to_moz(M.condition),
+            update: to_moz(M.step),
+            body: to_moz(M.body)
+        };
+    });
+    def_to_moz(AST_ForIn, function To_Moz_ForInStatement(M) {
+        return {
+            type: "ForInStatement",
+            left: to_moz(M.init),
+            right: to_moz(M.object),
+            body: to_moz(M.body)
+        };
+    });
+    def_to_moz(AST_ForOf, function To_Moz_ForOfStatement(M) {
+        return {
+            type: "ForOfStatement",
+            left: to_moz(M.init),
+            right: to_moz(M.object),
+            body: to_moz(M.body),
+            await: M.await
+        };
+    });
+    def_to_moz(AST_Await, function To_Moz_AwaitExpression(M) {
+        return {
+            type: "AwaitExpression",
+            argument: to_moz(M.expression)
+        };
+    });
+    def_to_moz(AST_Yield, function To_Moz_YieldExpression(M) {
+        return {
+            type: "YieldExpression",
+            argument: to_moz(M.expression),
+            delegate: M.is_star
+        };
+    });
+    def_to_moz(AST_Debugger, function To_Moz_DebuggerStatement() {
+        return {
+            type: "DebuggerStatement"
+        };
+    });
+    def_to_moz(AST_VarDef, function To_Moz_VariableDeclarator(M) {
+        return {
+            type: "VariableDeclarator",
+            id: to_moz(M.name),
+            init: to_moz(M.value)
+        };
+    });
+    def_to_moz(AST_Catch, function To_Moz_CatchClause(M) {
+        return {
+            type: "CatchClause",
+            param: to_moz(M.argname),
+            body: to_moz_block(M)
+        };
+    });
+
+    def_to_moz(AST_This, function To_Moz_ThisExpression() {
+        return {
+            type: "ThisExpression"
+        };
+    });
+    def_to_moz(AST_Super, function To_Moz_Super() {
+        return {
+            type: "Super"
+        };
+    });
+    def_to_moz(AST_Binary, function To_Moz_BinaryExpression(M) {
+        return {
+            type: "BinaryExpression",
+            operator: M.operator,
+            left: to_moz(M.left),
+            right: to_moz(M.right)
+        };
+    });
+    def_to_moz(AST_Binary, function To_Moz_LogicalExpression(M) {
+        return {
+            type: "LogicalExpression",
+            operator: M.operator,
+            left: to_moz(M.left),
+            right: to_moz(M.right)
+        };
+    });
+    def_to_moz(AST_Assign, function To_Moz_AssignmentExpression(M) {
+        return {
+            type: "AssignmentExpression",
+            operator: M.operator,
+            left: to_moz(M.left),
+            right: to_moz(M.right)
+        };
+    });
+    def_to_moz(AST_Conditional, function To_Moz_ConditionalExpression(M) {
+        return {
+            type: "ConditionalExpression",
+            test: to_moz(M.condition),
+            consequent: to_moz(M.consequent),
+            alternate: to_moz(M.alternative)
+        };
+    });
+    def_to_moz(AST_New, function To_Moz_NewExpression(M) {
+        return {
+            type: "NewExpression",
+            callee: to_moz(M.expression),
+            arguments: M.args.map(to_moz)
+        };
+    });
+    def_to_moz(AST_Call, function To_Moz_CallExpression(M) {
+        return {
+            type: "CallExpression",
+            callee: to_moz(M.expression),
+            optional: M.optional,
+            arguments: M.args.map(to_moz)
+        };
+    });
+
+    def_to_moz(AST_Toplevel, function To_Moz_Program(M) {
+        return to_moz_scope("Program", M);
+    });
+
+    def_to_moz(AST_Expansion, function To_Moz_Spread(M) {
+        return {
+            type: to_moz_in_destructuring() ? "RestElement" : "SpreadElement",
+            argument: to_moz(M.expression)
+        };
+    });
+
+    def_to_moz(AST_PrefixedTemplateString, function To_Moz_TaggedTemplateExpression(M) {
+        return {
+            type: "TaggedTemplateExpression",
+            tag: to_moz(M.prefix),
+            quasi: to_moz(M.template_string)
+        };
+    });
+
+    def_to_moz(AST_TemplateString, function To_Moz_TemplateLiteral(M) {
+        var quasis = [];
+        var expressions = [];
+        for (var i = 0; i < M.segments.length; i++) {
+            if (i % 2 !== 0) {
+                expressions.push(to_moz(M.segments[i]));
+            } else {
+                quasis.push({
+                    type: "TemplateElement",
+                    value: {
+                        raw: M.segments[i].raw,
+                        cooked: M.segments[i].value
+                    },
+                    tail: i === M.segments.length - 1
+                });
+            }
+        }
+        return {
+            type: "TemplateLiteral",
+            quasis: quasis,
+            expressions: expressions
+        };
+    });
+
+    def_to_moz(AST_Defun, function To_Moz_FunctionDeclaration(M) {
+        return {
+            type: "FunctionDeclaration",
+            id: to_moz(M.name),
+            params: M.argnames.map(to_moz),
+            generator: M.is_generator,
+            async: M.async,
+            body: to_moz_scope("BlockStatement", M)
+        };
+    });
+
+    def_to_moz(AST_Function, function To_Moz_FunctionExpression(M, parent) {
+        var is_generator = parent.is_generator !== undefined ?
+            parent.is_generator : M.is_generator;
+        return {
+            type: "FunctionExpression",
+            id: to_moz(M.name),
+            params: M.argnames.map(to_moz),
+            generator: is_generator,
+            async: M.async,
+            body: to_moz_scope("BlockStatement", M)
+        };
+    });
+
+    def_to_moz(AST_Arrow, function To_Moz_ArrowFunctionExpression(M) {
+        var body = {
+            type: "BlockStatement",
+            body: M.body.map(to_moz)
+        };
+        return {
+            type: "ArrowFunctionExpression",
+            params: M.argnames.map(to_moz),
+            async: M.async,
+            body: body
+        };
+    });
+
+    def_to_moz(AST_Destructuring, function To_Moz_ObjectPattern(M) {
+        if (M.is_array) {
+            return {
+                type: "ArrayPattern",
+                elements: M.names.map(to_moz)
+            };
+        }
+        return {
+            type: "ObjectPattern",
+            properties: M.names.map(to_moz)
+        };
+    });
+
+    def_to_moz(AST_Directive, function To_Moz_Directive(M) {
+        return {
+            type: "ExpressionStatement",
+            expression: {
+                type: "Literal",
+                value: M.value,
+                raw: M.print_to_string()
+            },
+            directive: M.value
+        };
+    });
+
+    def_to_moz(AST_SimpleStatement, function To_Moz_ExpressionStatement(M) {
+        return {
+            type: "ExpressionStatement",
+            expression: to_moz(M.body)
+        };
+    });
+
+    def_to_moz(AST_SwitchBranch, function To_Moz_SwitchCase(M) {
+        return {
+            type: "SwitchCase",
+            test: to_moz(M.expression),
+            consequent: M.body.map(to_moz)
+        };
+    });
+
+    def_to_moz(AST_Try, function To_Moz_TryStatement(M) {
+        return {
+            type: "TryStatement",
+            block: to_moz_block(M.body),
+            handler: to_moz(M.bcatch),
+            guardedHandlers: [],
+            finalizer: to_moz(M.bfinally)
+        };
+    });
+
+    def_to_moz(AST_Catch, function To_Moz_CatchClause(M) {
+        return {
+            type: "CatchClause",
+            param: to_moz(M.argname),
+            guard: null,
+            body: to_moz_block(M)
+        };
+    });
+
+    def_to_moz(AST_Definitions, function To_Moz_VariableDeclaration(M) {
+        return {
+            type: "VariableDeclaration",
+            kind:
+                M instanceof AST_Const ? "const" :
+                M instanceof AST_Let ? "let" : "var",
+            declarations: M.definitions.map(to_moz)
+        };
+    });
+
+    const assert_clause_to_moz = assert_clause => {
+        const assertions = [];
+        if (assert_clause) {
+            for (const { key, value } of assert_clause.properties) {
+                const key_moz = is_basic_identifier_string(key)
+                    ? { type: "Identifier", name: key }
+                    : { type: "Literal", value: key, raw: JSON.stringify(key) };
+                assertions.push({
+                    type: "ImportAttribute",
+                    key: key_moz,
+                    value: to_moz(value)
+                });
+            }
+        }
+        return assertions;
+    };
+
+    def_to_moz(AST_Export, function To_Moz_ExportDeclaration(M) {
+        if (M.exported_names) {
+            var first_exported = M.exported_names[0];
+            var first_exported_name = first_exported.name;
+            if (first_exported_name.name === "*" && !first_exported_name.quote) {
+                var foreign_name = first_exported.foreign_name;
+                var exported = foreign_name.name === "*" && !foreign_name.quote
+                    ? null
+                    : to_moz(foreign_name);
+                return {
+                    type: "ExportAllDeclaration",
+                    source: to_moz(M.module_name),
+                    exported: exported,
+                    assertions: assert_clause_to_moz(M.assert_clause)
+                };
+            }
+            return {
+                type: "ExportNamedDeclaration",
+                specifiers: M.exported_names.map(function (name_mapping) {
+                    return {
+                        type: "ExportSpecifier",
+                        exported: to_moz(name_mapping.foreign_name),
+                        local: to_moz(name_mapping.name)
+                    };
+                }),
+                declaration: to_moz(M.exported_definition),
+                source: to_moz(M.module_name),
+                assertions: assert_clause_to_moz(M.assert_clause)
+            };
+        }
+        return {
+            type: M.is_default ? "ExportDefaultDeclaration" : "ExportNamedDeclaration",
+            declaration: to_moz(M.exported_value || M.exported_definition)
+        };
+    });
+
+    def_to_moz(AST_Import, function To_Moz_ImportDeclaration(M) {
+        var specifiers = [];
+        if (M.imported_name) {
+            specifiers.push({
+                type: "ImportDefaultSpecifier",
+                local: to_moz(M.imported_name)
+            });
+        }
+        if (M.imported_names) {
+            var first_imported_foreign_name = M.imported_names[0].foreign_name;
+            if (first_imported_foreign_name.name === "*" && !first_imported_foreign_name.quote) {
+                specifiers.push({
+                    type: "ImportNamespaceSpecifier",
+                    local: to_moz(M.imported_names[0].name)
+                });
+            } else {
+                M.imported_names.forEach(function(name_mapping) {
+                    specifiers.push({
+                        type: "ImportSpecifier",
+                        local: to_moz(name_mapping.name),
+                        imported: to_moz(name_mapping.foreign_name)
+                    });
+                });
+            }
+        }
+        return {
+            type: "ImportDeclaration",
+            specifiers: specifiers,
+            source: to_moz(M.module_name),
+            assertions: assert_clause_to_moz(M.assert_clause)
+        };
+    });
+
+    def_to_moz(AST_ImportMeta, function To_Moz_MetaProperty() {
+        return {
+            type: "MetaProperty",
+            meta: {
+                type: "Identifier",
+                name: "import"
+            },
+            property: {
+                type: "Identifier",
+                name: "meta"
+            }
+        };
+    });
+
+    def_to_moz(AST_Sequence, function To_Moz_SequenceExpression(M) {
+        return {
+            type: "SequenceExpression",
+            expressions: M.expressions.map(to_moz)
+        };
+    });
+
+    def_to_moz(AST_DotHash, function To_Moz_PrivateMemberExpression(M) {
+        return {
+            type: "MemberExpression",
+            object: to_moz(M.expression),
+            computed: false,
+            property: {
+                type: "PrivateIdentifier",
+                name: M.property
+            },
+            optional: M.optional
+        };
+    });
+
+    def_to_moz(AST_PropAccess, function To_Moz_MemberExpression(M) {
+        var isComputed = M instanceof AST_Sub;
+        return {
+            type: "MemberExpression",
+            object: to_moz(M.expression),
+            computed: isComputed,
+            property: isComputed ? to_moz(M.property) : {type: "Identifier", name: M.property},
+            optional: M.optional
+        };
+    });
+
+    def_to_moz(AST_Chain, function To_Moz_ChainExpression(M) {
+        return {
+            type: "ChainExpression",
+            expression: to_moz(M.expression)
+        };
+    });
+
+    def_to_moz(AST_Unary, function To_Moz_Unary(M) {
+        return {
+            type: M.operator == "++" || M.operator == "--" ? "UpdateExpression" : "UnaryExpression",
+            operator: M.operator,
+            prefix: M instanceof AST_UnaryPrefix,
+            argument: to_moz(M.expression)
+        };
+    });
+
+    def_to_moz(AST_Binary, function To_Moz_BinaryExpression(M) {
+        if (M.operator == "=" && to_moz_in_destructuring()) {
+            return {
+                type: "AssignmentPattern",
+                left: to_moz(M.left),
+                right: to_moz(M.right)
+            };
+        }
+
+        const type = M.operator == "&&" || M.operator == "||" || M.operator === "??"
+            ? "LogicalExpression"
+            : "BinaryExpression";
+
+        return {
+            type,
+            left: to_moz(M.left),
+            operator: M.operator,
+            right: to_moz(M.right)
+        };
+    });
+
+    def_to_moz(AST_PrivateIn, function To_Moz_BinaryExpression_PrivateIn(M) {
+        return {
+            type: "BinaryExpression",
+            left: { type: "PrivateIdentifier", name: M.key.name },
+            operator: "in",
+            right: to_moz(M.value),
+        };
+    });
+
+    def_to_moz(AST_Array, function To_Moz_ArrayExpression(M) {
+        return {
+            type: "ArrayExpression",
+            elements: M.elements.map(to_moz)
+        };
+    });
+
+    def_to_moz(AST_Object, function To_Moz_ObjectExpression(M) {
+        return {
+            type: "ObjectExpression",
+            properties: M.properties.map(to_moz)
+        };
+    });
+
+    def_to_moz(AST_ObjectProperty, function To_Moz_Property(M, parent) {
+        var key = M.key instanceof AST_Node ? to_moz(M.key) : {
+            type: "Identifier",
+            value: M.key
+        };
+        if (typeof M.key === "number") {
+            key = {
+                type: "Literal",
+                value: Number(M.key)
+            };
+        }
+        if (typeof M.key === "string") {
+            key = {
+                type: "Identifier",
+                name: M.key
+            };
+        }
+        var kind;
+        var string_or_num = typeof M.key === "string" || typeof M.key === "number";
+        var computed = string_or_num ? false : !(M.key instanceof AST_Symbol) || M.key instanceof AST_SymbolRef;
+        if (M instanceof AST_ObjectKeyVal) {
+            kind = "init";
+            computed = !string_or_num;
+        } else
+        if (M instanceof AST_ObjectGetter) {
+            kind = "get";
+        } else
+        if (M instanceof AST_ObjectSetter) {
+            kind = "set";
+        }
+        if (M instanceof AST_PrivateGetter || M instanceof AST_PrivateSetter) {
+            const kind = M instanceof AST_PrivateGetter ? "get" : "set";
+            return {
+                type: "MethodDefinition",
+                computed: false,
+                kind: kind,
+                static: M.static,
+                key: {
+                    type: "PrivateIdentifier",
+                    name: M.key.name
+                },
+                value: to_moz(M.value)
+            };
+        }
+        if (M instanceof AST_ClassPrivateProperty) {
+            return {
+                type: "PropertyDefinition",
+                key: {
+                    type: "PrivateIdentifier",
+                    name: M.key.name
+                },
+                value: to_moz(M.value),
+                computed: false,
+                static: M.static
+            };
+        }
+        if (M instanceof AST_ClassProperty) {
+            return {
+                type: "PropertyDefinition",
+                key,
+                value: to_moz(M.value),
+                computed,
+                static: M.static
+            };
+        }
+        if (parent instanceof AST_Class) {
+            return {
+                type: "MethodDefinition",
+                computed: computed,
+                kind: kind,
+                static: M.static,
+                key: to_moz(M.key),
+                value: to_moz(M.value)
+            };
+        }
+        return {
+            type: "Property",
+            computed: computed,
+            kind: kind,
+            key: key,
+            value: to_moz(M.value)
+        };
+    });
+
+    def_to_moz(AST_ConciseMethod, function To_Moz_MethodDefinition(M, parent) {
+        if (parent instanceof AST_Object) {
+            return {
+                type: "Property",
+                computed: !(M.key instanceof AST_Symbol) || M.key instanceof AST_SymbolRef,
+                kind: "init",
+                method: true,
+                shorthand: false,
+                key: to_moz(M.key),
+                value: to_moz(M.value)
+            };
+        }
+
+        const key = M instanceof AST_PrivateMethod
+            ? {
+                type: "PrivateIdentifier",
+                name: M.key.name
+            }
+            : to_moz(M.key);
+
+        return {
+            type: "MethodDefinition",
+            kind: M.key === "constructor" ? "constructor" : "method",
+            key,
+            value: to_moz(M.value),
+            computed: !(M.key instanceof AST_Symbol) || M.key instanceof AST_SymbolRef,
+            static: M.static,
+        };
+    });
+
+    def_to_moz(AST_Class, function To_Moz_Class(M) {
+        var type = M instanceof AST_ClassExpression ? "ClassExpression" : "ClassDeclaration";
+        return {
+            type: type,
+            superClass: to_moz(M.extends),
+            id: M.name ? to_moz(M.name) : null,
+            body: {
+                type: "ClassBody",
+                body: M.properties.map(to_moz)
+            }
+        };
+    });
+
+    def_to_moz(AST_ClassStaticBlock, function To_Moz_StaticBlock(M) {
+        return {
+            type: "StaticBlock",
+            body: M.body.map(to_moz),
+        };
+    });
+
+    def_to_moz(AST_NewTarget, function To_Moz_MetaProperty() {
+        return {
+            type: "MetaProperty",
+            meta: {
+                type: "Identifier",
+                name: "new"
+            },
+            property: {
+                type: "Identifier",
+                name: "target"
+            }
+        };
+    });
+
+    def_to_moz(AST_Symbol, function To_Moz_Identifier(M, parent) {
+        if (
+            (M instanceof AST_SymbolMethod && parent.quote) ||
+            ((
+                M instanceof AST_SymbolImportForeign ||
+                M instanceof AST_SymbolExportForeign ||
+                M instanceof AST_SymbolExport
+                ) && M.quote)
+         ) {
+            return {
+                type: "Literal",
+                value: M.name
+            };
+        }
+        var def = M.definition();
+        return {
+            type: "Identifier",
+            name: def ? def.mangled_name || def.name : M.name
+        };
+    });
+
+    def_to_moz(AST_RegExp, function To_Moz_RegExpLiteral(M) {
+        const pattern = M.value.source;
+        const flags = M.value.flags;
+        return {
+            type: "Literal",
+            value: null,
+            raw: M.print_to_string(),
+            regex: { pattern, flags }
+        };
+    });
+
+    def_to_moz(AST_Constant, function To_Moz_Literal(M) {
+        var value = M.value;
+        return {
+            type: "Literal",
+            value: value,
+            raw: M.raw || M.print_to_string()
+        };
+    });
+
+    def_to_moz(AST_Atom, function To_Moz_Atom(M) {
+        return {
+            type: "Identifier",
+            name: String(M.value)
+        };
+    });
+
+    def_to_moz(AST_BigInt, M => ({
+        type: "BigIntLiteral",
+        value: M.value
+    }));
+
+    AST_Boolean.DEFMETHOD("to_mozilla_ast", AST_Constant.prototype.to_mozilla_ast);
+    AST_Null.DEFMETHOD("to_mozilla_ast", AST_Constant.prototype.to_mozilla_ast);
+    AST_Hole.DEFMETHOD("to_mozilla_ast", function To_Moz_ArrayHole() { return null; });
+
+    AST_Block.DEFMETHOD("to_mozilla_ast", AST_BlockStatement.prototype.to_mozilla_ast);
+    AST_Lambda.DEFMETHOD("to_mozilla_ast", AST_Function.prototype.to_mozilla_ast);
+
+    /* -----[ tools ]----- */
+
+    function my_start_token(moznode) {
+        var loc = moznode.loc, start = loc && loc.start;
+        var range = moznode.range;
+        return new AST_Token(
+            "",
+            "",
+            start && start.line || 0,
+            start && start.column || 0,
+            range ? range [0] : moznode.start,
+            false,
+            [],
+            [],
+            loc && loc.source,
+        );
+    }
+
+    function my_end_token(moznode) {
+        var loc = moznode.loc, end = loc && loc.end;
+        var range = moznode.range;
+        return new AST_Token(
+            "",
+            "",
+            end && end.line || 0,
+            end && end.column || 0,
+            range ? range [0] : moznode.end,
+            false,
+            [],
+            [],
+            loc && loc.source,
+        );
+    }
+
+    var FROM_MOZ_STACK = null;
+
+    function from_moz(node) {
+        FROM_MOZ_STACK.push(node);
+        var ret = node != null ? MOZ_TO_ME[node.type](node) : null;
+        FROM_MOZ_STACK.pop();
+        return ret;
+    }
+
+    AST_Node.from_mozilla_ast = function(node) {
+        var save_stack = FROM_MOZ_STACK;
+        FROM_MOZ_STACK = [];
+        var ast = from_moz(node);
+        FROM_MOZ_STACK = save_stack;
+        return ast;
+    };
+
+    function set_moz_loc(mynode, moznode) {
+        var start = mynode.start;
+        var end = mynode.end;
+        if (!(start && end)) {
+            return moznode;
+        }
+        if (start.pos != null && end.endpos != null) {
+            moznode.range = [start.pos, end.endpos];
+        }
+        if (start.line) {
+            moznode.loc = {
+                start: {line: start.line, column: start.col},
+                end: end.endline ? {line: end.endline, column: end.endcol} : null
+            };
+            if (start.file) {
+                moznode.loc.source = start.file;
+            }
+        }
+        return moznode;
+    }
+
+    function def_to_moz(mytype, handler) {
+        mytype.DEFMETHOD("to_mozilla_ast", function(parent) {
+            return set_moz_loc(this, handler(this, parent));
+        });
+    }
+
+    var TO_MOZ_STACK = null;
+
+    function to_moz(node) {
+        if (TO_MOZ_STACK === null) { TO_MOZ_STACK = []; }
+        TO_MOZ_STACK.push(node);
+        var ast = node != null ? node.to_mozilla_ast(TO_MOZ_STACK[TO_MOZ_STACK.length - 2]) : null;
+        TO_MOZ_STACK.pop();
+        if (TO_MOZ_STACK.length === 0) { TO_MOZ_STACK = null; }
+        return ast;
+    }
+
+    function to_moz_in_destructuring() {
+        var i = TO_MOZ_STACK.length;
+        while (i--) {
+            if (TO_MOZ_STACK[i] instanceof AST_Destructuring) {
+                return true;
+            }
+        }
+        return false;
+    }
+
+    function to_moz_block(node) {
+        return {
+            type: "BlockStatement",
+            body: node.body.map(to_moz)
+        };
+    }
+
+    function to_moz_scope(type, node) {
+        var body = node.body.map(to_moz);
+        if (node.body[0] instanceof AST_SimpleStatement && node.body[0].body instanceof AST_String) {
+            body.unshift(to_moz(new AST_EmptyStatement(node.body[0])));
+        }
+        return {
+            type: type,
+            body: body
+        };
+    }
+})();