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

Parse and compress destructuring VarDefs

Browse Source
This commit is contained in:
Fábio Santos
2015-08-14 00:20:21 +01:00
committed by Richard van Velzen
parent 824ecfb8a2
commit c44c2d6c21
7 changed files with 105 additions and 8 deletions
Download Patch File Download Diff File Expand all files Collapse all files

33
lib/parse.js
View File

@@ -1180,13 +1180,24 @@ function parse($TEXT, options) {
function vardefs(no_in, in_const) {
var a = [];
var def;
for (;;) {
a.push(new AST_VarDef({
start : S.token,
name : as_symbol(in_const ? AST_SymbolConst : AST_SymbolVar),
value : is("operator", "=") ? (next(), expression(false, no_in)) : null,
end : prev()
}));
if (is("punc", "{") || is("punc", "[")) {
def = new AST_VarDef({
start: S.token,
name: destructuring_(),
value: (expect_token("operator", "="), expression(false, no_in)),
end: prev()
});
} else {
def = new AST_VarDef({
start : S.token,
name : as_symbol(in_const ? AST_SymbolConst : AST_SymbolVar),
value : is("operator", "=") ? (next(), expression(false, no_in)) : null,
end : prev()
})
}
a.push(def);
if (!is("punc", ","))
break;
next();
@@ -1194,6 +1205,16 @@ function parse($TEXT, options) {
return a;
};
var destructuring_ = embed_tokens(function () {
var is_array = is("punc", "[");
var closing = is_array ? ']' : '}';
next()
return new AST_Destructuring({
names: expr_list(closing),
is_array: is_array
})
});
var var_ = function(no_in) {
return new AST_Var({
start : prev(),