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handle AST_Super in collapse_vars & side_effects

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alexlamsl
2017-09-17 05:00:58 +08:00
parent d73500e8d1
commit 3b0b4d6abf
2 changed files with 51 additions and 0 deletions
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3
lib/compress.js
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@@ -579,6 +579,7 @@ merge(Compressor.prototype, {
}
function is_lhs_read_only(lhs) {
if (lhs instanceof AST_Super) return true;
if (lhs instanceof AST_This) return true;
if (lhs instanceof AST_SymbolRef) return lhs.definition().orig[0] instanceof AST_SymbolLambda;
if (lhs instanceof AST_PropAccess) {
@@ -2109,6 +2110,7 @@ merge(Compressor.prototype, {
def(AST_EmptyStatement, return_false);
def(AST_Constant, return_false);
def(AST_Super, return_false);
def(AST_This, return_false);
def(AST_Call, function(compressor){
@@ -2787,6 +2789,7 @@ merge(Compressor.prototype, {
def(AST_Node, return_this);
def(AST_Constant, return_null);
def(AST_Super, return_null);
def(AST_This, return_null);
def(AST_Call, function(compressor, first_in_statement){
if (!this.is_expr_pure(compressor)) {

48
test/compress/pure_getters.js
View File

@@ -672,3 +672,51 @@ issue_2313_6: {
x();
}
}
issue_2313_7: {
options = {
collapse_vars: true,
conditionals: true,
pure_getters: true,
}
input: {
var a = 0, b = 0;
class foo {
get c() {
a++;
return 42;
}
set c(c) {
b++;
}
}
class bar extends foo {
d() {
super.c++;
if (super.c) console.log(a, b);
}
}
new bar().d();
}
expect: {
var a = 0, b = 0;
class foo {
get c() {
a++;
return 42;
}
set c(c) {
b++;
}
}
class bar extends foo {
d() {
super.c++;
super.c && console.log(a, b);
}
}
new bar().d();
}
expect_stdout: "2 1"
node_version: ">=6"
}