JoBoEVD/UglifyJS
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

support export statements (#4650)

Browse Source
This commit is contained in:
Alex Lam S.L
2021-02-14 20:13:54 +00:00
committed by GitHub
parent b7219ac489
commit c21f096ab8
9 changed files with 526 additions and 16 deletions
Download Patch File Download Diff File Expand all files Collapse all files

23
lib/scope.js
View File

@@ -45,6 +45,7 @@
function SymbolDef(id, scope, orig, init) {
this.eliminated = 0;
this.exported = false;
this.global = false;
this.id = id;
this.init = init;
@@ -91,6 +92,7 @@ SymbolDef.prototype = {
},
unmangleable: function(options) {
return this.global && !options.toplevel
|| this.exported
|| this.undeclared
|| !options.eval && this.scope.pinned()
|| options.keep_fnames
@@ -118,11 +120,22 @@ AST_Toplevel.DEFMETHOD("figure_out_scope", function(options) {
// pass 1: setup scope chaining and handle definitions
var self = this;
var defun = null;
var exported = false;
var next_def_id = 0;
var scope = self.parent_scope = null;
var tw = new TreeWalker(function(node, descend) {
if (node instanceof AST_Definitions) {
var save_exported = exported;
exported = tw.parent() instanceof AST_ExportDeclaration;
descend();
exported = save_exported;
return true;
}
if (node instanceof AST_LambdaDefinition) {
var save_exported = exported;
exported = tw.parent() instanceof AST_ExportDeclaration;
node.name.walk(tw);
exported = save_exported;
walk_scope(function() {
node.argnames.forEach(function(argname) {
argname.walk(tw);
@@ -169,9 +182,11 @@ AST_Toplevel.DEFMETHOD("figure_out_scope", function(options) {
if (node instanceof AST_SymbolCatch) {
scope.def_variable(node).defun = defun;
} else if (node instanceof AST_SymbolConst) {
scope.def_variable(node).defun = defun;
var def = scope.def_variable(node);
def.defun = defun;
def.exported = exported;
} else if (node instanceof AST_SymbolDefun) {
defun.def_function(node, tw.parent());
defun.def_function(node, tw.parent()).exported = exported;
entangle(defun, scope);
} else if (node instanceof AST_SymbolFunarg) {
defun.def_variable(node);
@@ -180,9 +195,9 @@ AST_Toplevel.DEFMETHOD("figure_out_scope", function(options) {
var def = defun.def_function(node, node.name == "arguments" ? undefined : defun);
if (options.ie8) def.defun = defun.parent_scope.resolve();
} else if (node instanceof AST_SymbolLet) {
scope.def_variable(node);
scope.def_variable(node).exported = exported;
} else if (node instanceof AST_SymbolVar) {
defun.def_variable(node, null);
defun.def_variable(node, null).exported = exported;
entangle(defun, scope);
}