update packages to latest version

node_modules/terser/lib/mozilla-ast.js

@@ -41,7 +41,6 @@
 
  ***********************************************************************/
 
-import * as ast from "./ast.js";
 import { make_node } from "./utils/index.js";
 import {
     AST_Accessor,
@@ -158,6 +157,7 @@ import {
     AST_With,
     AST_Yield,
 } from "./ast.js";
+import { is_basic_identifier_string } from "./parse.js";
 
 (function() {
 
@@ -179,6 +179,24 @@ import {
         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({
@@ -187,6 +205,7 @@ import {
                 body: normalize_directives(M.body.map(from_moz))
             });
         },
+
         ArrayPattern: function(M) {
             return new AST_Destructuring({
                 start: my_start_token(M),
@@ -200,6 +219,7 @@ import {
                 is_array: true
             });
         },
+
         ObjectPattern: function(M) {
             return new AST_Destructuring({
                 start: my_start_token(M),
@@ -208,6 +228,7 @@ import {
                 is_array: false
             });
         },
+
         AssignmentPattern: function(M) {
             return new AST_DefaultAssign({
                 start: my_start_token(M),
@@ -217,6 +238,7 @@ import {
                 right: from_moz(M.right)
             });
         },
+
         SpreadElement: function(M) {
             return new AST_Expansion({
                 start: my_start_token(M),
@@ -224,6 +246,7 @@ import {
                 expression: from_moz(M.argument)
             });
         },
+
         RestElement: function(M) {
             return new AST_Expansion({
                 start: my_start_token(M),
@@ -231,6 +254,7 @@ import {
                 expression: from_moz(M.argument)
             });
         },
+
         TemplateElement: function(M) {
             return new AST_TemplateSegment({
                 start: my_start_token(M),
@@ -239,6 +263,7 @@ import {
                 raw: M.value.raw
             });
         },
+
         TemplateLiteral: function(M) {
             var segments = [];
             for (var i = 0; i < M.quasis.length; i++) {
@@ -253,6 +278,7 @@ import {
                 segments: segments
             });
         },
+
         TaggedTemplateExpression: function(M) {
             return new AST_PrefixedTemplateString({
                 start: my_start_token(M),
@@ -261,6 +287,7 @@ import {
                 prefix: from_moz(M.tag)
             });
         },
+
         FunctionDeclaration: function(M) {
             return new AST_Defun({
                 start: my_start_token(M),
@@ -272,6 +299,7 @@ import {
                 body: normalize_directives(from_moz(M.body).body)
             });
         },
+
         FunctionExpression: function(M) {
             return new AST_Function({
                 start: my_start_token(M),
@@ -283,6 +311,7 @@ import {
                 body: normalize_directives(from_moz(M.body).body)
             });
         },
+
         ArrowFunctionExpression: function(M) {
             const body = M.body.type === "BlockStatement"
                 ? from_moz(M.body).body
@@ -295,6 +324,7 @@ import {
                 async: M.async,
             });
         },
+
         ExpressionStatement: function(M) {
             return new AST_SimpleStatement({
                 start: my_start_token(M),
@@ -302,6 +332,7 @@ import {
                 body: from_moz(M.expression)
             });
         },
+
         TryStatement: function(M) {
             var handlers = M.handlers || [M.handler];
             if (handlers.length > 1 || M.guardedHandlers && M.guardedHandlers.length) {
@@ -315,6 +346,7 @@ import {
                 bfinally : M.finalizer ? new AST_Finally(from_moz(M.finalizer)) : null
             });
         },
+
         Property: function(M) {
             var key = M.key;
             var args = {
@@ -357,6 +389,7 @@ import {
                 return new AST_ConciseMethod(args);
             }
         },
+
         MethodDefinition: function(M) {
             var args = {
                 start    : my_start_token(M),
@@ -375,6 +408,7 @@ import {
             args.async = M.value.async;
             return new AST_ConciseMethod(args);
         },
+
         FieldDefinition: function(M) {
             let key;
             if (M.computed) {
@@ -391,6 +425,7 @@ import {
                 static   : M.static,
             });
         },
+
         PropertyDefinition: function(M) {
             let key;
             if (M.computed) {
@@ -408,6 +443,7 @@ import {
                 static   : M.static,
             });
         },
+
         ArrayExpression: function(M) {
             return new AST_Array({
                 start    : my_start_token(M),
@@ -417,6 +453,7 @@ import {
                 })
             });
         },
+
         ObjectExpression: function(M) {
             return new AST_Object({
                 start      : my_start_token(M),
@@ -430,6 +467,7 @@ import {
                 })
             });
         },
+
         SequenceExpression: function(M) {
             return new AST_Sequence({
                 start      : my_start_token(M),
@@ -437,6 +475,7 @@ import {
                 expressions: M.expressions.map(from_moz)
             });
         },
+
         MemberExpression: function(M) {
             return new (M.computed ? AST_Sub : AST_Dot)({
                 start      : my_start_token(M),
@@ -446,6 +485,7 @@ import {
                 optional   : M.optional || false
             });
         },
+
         ChainExpression: function(M) {
             return new AST_Chain({
                 start      : my_start_token(M),
@@ -453,6 +493,7 @@ import {
                 expression : from_moz(M.expression)
             });
         },
+
         SwitchCase: function(M) {
             return new (M.test ? AST_Case : AST_Default)({
                 start      : my_start_token(M),
@@ -461,6 +502,7 @@ import {
                 body       : M.consequent.map(from_moz)
             });
         },
+
         VariableDeclaration: function(M) {
             return new (M.kind === "const" ? AST_Const :
                         M.kind === "let" ? AST_Let : AST_Var)({
@@ -499,9 +541,11 @@ import {
                 end         : my_end_token(M),
                 imported_name: imported_name,
                 imported_names : imported_names,
-                module_name : from_moz(M.source)
+                module_name : from_moz(M.source),
+                assert_clause: assert_clause_from_moz(M.assertions)
             });
         },
+
         ExportAllDeclaration: function(M) {
             return new AST_Export({
                 start: my_start_token(M),
@@ -512,9 +556,11 @@ import {
                         foreign_name: new AST_SymbolExportForeign({ name: "*" })
                     })
                 ],
-                module_name: from_moz(M.source)
+                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),
@@ -526,9 +572,11 @@ import {
                         name: from_moz(specifier.local)
                     });
                 }) : null,
-                module_name: from_moz(M.source)
+                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),
@@ -537,6 +585,7 @@ import {
                 is_default: true
             });
         },
+
         Literal: function(M) {
             var val = M.value, args = {
                 start  : my_start_token(M),
@@ -572,6 +621,7 @@ import {
                 return new (val ? AST_True : AST_False)(args);
             }
         },
+
         MetaProperty: function(M) {
             if (M.meta.name === "new" && M.property.name === "target") {
                 return new AST_NewTarget({
@@ -585,6 +635,7 @@ import {
                 });
             }
         },
+
         Identifier: function(M) {
             var p = FROM_MOZ_STACK[FROM_MOZ_STACK.length - 2];
             return new (  p.type == "LabeledStatement" ? AST_Label
@@ -607,12 +658,262 @@ import {
                             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) {
+            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)
+            });
         }
     };
 
@@ -639,35 +940,200 @@ import {
         });
     };
 
-    map("EmptyStatement", AST_EmptyStatement);
-    map("BlockStatement", AST_BlockStatement, "body@body");
-    map("IfStatement", AST_If, "test>condition, consequent>body, alternate>alternative");
-    map("LabeledStatement", AST_LabeledStatement, "label>label, body>body");
-    map("BreakStatement", AST_Break, "label>label");
-    map("ContinueStatement", AST_Continue, "label>label");
-    map("WithStatement", AST_With, "object>expression, body>body");
-    map("SwitchStatement", AST_Switch, "discriminant>expression, cases@body");
-    map("ReturnStatement", AST_Return, "argument>value");
-    map("ThrowStatement", AST_Throw, "argument>value");
-    map("WhileStatement", AST_While, "test>condition, body>body");
-    map("DoWhileStatement", AST_Do, "test>condition, body>body");
-    map("ForStatement", AST_For, "init>init, test>condition, update>step, body>body");
-    map("ForInStatement", AST_ForIn, "left>init, right>object, body>body");
-    map("ForOfStatement", AST_ForOf, "left>init, right>object, body>body, await=await");
-    map("AwaitExpression", AST_Await, "argument>expression");
-    map("YieldExpression", AST_Yield, "argument>expression, delegate=is_star");
-    map("DebuggerStatement", AST_Debugger);
-    map("VariableDeclarator", AST_VarDef, "id>name, init>value");
-    map("CatchClause", AST_Catch, "param>argname, body%body");
+    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)
+        };
+    });
 
-    map("ThisExpression", AST_This);
-    map("Super", AST_Super);
-    map("BinaryExpression", AST_Binary, "operator=operator, left>left, right>right");
-    map("LogicalExpression", AST_Binary, "operator=operator, left>left, right>right");
-    map("AssignmentExpression", AST_Assign, "operator=operator, left>left, right>right");
-    map("ConditionalExpression", AST_Conditional, "test>condition, consequent>consequent, alternate>alternative");
-    map("NewExpression", AST_New, "callee>expression, arguments@args");
-    map("CallExpression", AST_Call, "callee>expression, optional=optional, arguments@args");
+    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);
@@ -818,12 +1284,30 @@ import {
         };
     });
 
+    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) {
             if (M.exported_names[0].name.name === "*") {
                 return {
                     type: "ExportAllDeclaration",
-                    source: to_moz(M.module_name)
+                    source: to_moz(M.module_name),
+                    assertions: assert_clause_to_moz(M.assert_clause)
                 };
             }
             return {
@@ -836,7 +1320,8 @@ import {
                     };
                 }),
                 declaration: to_moz(M.exported_definition),
-                source: to_moz(M.module_name)
+                source: to_moz(M.module_name),
+                assertions: assert_clause_to_moz(M.assert_clause)
             };
         }
         return {
@@ -870,7 +1355,8 @@ import {
         return {
             type: "ImportDeclaration",
             specifiers: specifiers,
-            source: to_moz(M.module_name)
+            source: to_moz(M.module_name),
+            assertions: assert_clause_to_moz(M.assert_clause)
         };
     });
 
@@ -1198,57 +1684,6 @@ import {
         );
     }
 
-    function map(moztype, mytype, propmap) {
-        var moz_to_me = "function From_Moz_" + moztype + "(M){\n";
-        moz_to_me += "return new U2." + mytype.name + "({\n" +
-            "start: my_start_token(M),\n" +
-            "end: my_end_token(M)";
-
-        var me_to_moz = "function To_Moz_" + moztype + "(M){\n";
-        me_to_moz += "return {\n" +
-            "type: " + JSON.stringify(moztype);
-
-        if (propmap) propmap.split(/\s*,\s*/).forEach(function(prop) {
-            var m = /([a-z0-9$_]+)([=@>%])([a-z0-9$_]+)/i.exec(prop);
-            if (!m) throw new Error("Can't understand property map: " + prop);
-            var moz = m[1], how = m[2], my = m[3];
-            moz_to_me += ",\n" + my + ": ";
-            me_to_moz += ",\n" + moz + ": ";
-            switch (how) {
-                case "@":
-                    moz_to_me += "M." + moz + ".map(from_moz)";
-                    me_to_moz += "M." +  my + ".map(to_moz)";
-                    break;
-                case ">":
-                    moz_to_me += "from_moz(M." + moz + ")";
-                    me_to_moz += "to_moz(M." + my + ")";
-                    break;
-                case "=":
-                    moz_to_me += "M." + moz;
-                    me_to_moz += "M." + my;
-                    break;
-                case "%":
-                    moz_to_me += "from_moz(M." + moz + ").body";
-                    me_to_moz += "to_moz_block(M)";
-                    break;
-                default:
-                    throw new Error("Can't understand operator in propmap: " + prop);
-            }
-        });
-
-        moz_to_me += "\n})\n}";
-        me_to_moz += "\n}\n}";
-
-        moz_to_me = new Function("U2", "my_start_token", "my_end_token", "from_moz", "return(" + moz_to_me + ")")(
-            ast, my_start_token, my_end_token, from_moz
-        );
-        me_to_moz = new Function("to_moz", "to_moz_block", "to_moz_scope", "return(" + me_to_moz + ")")(
-            to_moz, to_moz_block, to_moz_scope
-        );
-        MOZ_TO_ME[moztype] = moz_to_me;
-        def_to_moz(mytype, me_to_moz);
-    }
-
     var FROM_MOZ_STACK = null;
 
     function from_moz(node) {