JoBoEVD/UglifyJS
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enable collapse_vars & reduce_vars by default

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- fix corner cases in `const` optimisation
- deprecate `/*@const*/`

fixes #1497
closes #1498
This commit is contained in:
alexlamsl
2017-02-24 01:46:57 +08:00
parent 1e51586996
commit 4e49302916
8 changed files with 56 additions and 25 deletions
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12
lib/scope.js
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@@ -97,7 +97,6 @@ AST_Toplevel.DEFMETHOD("figure_out_scope", function(options){
var scope = self.parent_scope = null;
var labels = new Dictionary();
var defun = null;
var last_var_had_const_pragma = false;
var tw = new TreeWalker(function(node, descend){
if (options.screw_ie8 && node instanceof AST_Catch) {
var save_scope = scope;
@@ -154,13 +153,10 @@ AST_Toplevel.DEFMETHOD("figure_out_scope", function(options){
// later.
(node.scope = defun.parent_scope).def_function(node);
}
else if (node instanceof AST_Var) {
last_var_had_const_pragma = node.has_const_pragma();
}
else if (node instanceof AST_SymbolVar
|| node instanceof AST_SymbolConst) {
var def = defun.def_variable(node);
def.constant = node instanceof AST_SymbolConst || last_var_had_const_pragma;
def.constant = node instanceof AST_SymbolConst;
def.init = tw.parent().value;
}
else if (node instanceof AST_SymbolCatch) {
@@ -369,12 +365,6 @@ AST_Symbol.DEFMETHOD("global", function(){
return this.definition().global;
});
AST_Var.DEFMETHOD("has_const_pragma", function() {
var comments_before = this.start && this.start.comments_before;
var lastComment = comments_before && comments_before[comments_before.length - 1];
return lastComment && /@const\b/.test(lastComment.value);
});
AST_Toplevel.DEFMETHOD("_default_mangler_options", function(options){
return defaults(options, {
except : [],