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fix corner case with optional chain operator (#4927)

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This commit is contained in:
Alex Lam S.L
2021-05-12 03:12:19 +01:00
committed by GitHub
parent 689f8f504d
commit 60f3b55156
2 changed files with 65 additions and 8 deletions
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31
lib/output.js
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@@ -790,10 +790,23 @@ function OutputStream(options) {
if (p instanceof AST_Unary) return true;
});
function lhs_has_optional(node, output) {
var p = output.parent();
if (p instanceof AST_PropAccess && p.expression === node && is_lhs(p, output.parent(1))) {
// ++(foo?.bar).baz
// (foo?.()).bar = baz
do {
if (node.optional) return true;
node = node.expression;
} while (node.TYPE == "Call" || node instanceof AST_PropAccess);
}
}
PARENS(AST_PropAccess, function(output) {
var node = this;
var p = output.parent();
if (p instanceof AST_New && p.expression === node) {
if (p instanceof AST_New) {
if (p.expression !== node) return false;
// i.e. new (foo().bar)
//
// if there's one call into this subtree, then we need
@@ -805,20 +818,22 @@ function OutputStream(options) {
} while (node instanceof AST_PropAccess);
return node.TYPE == "Call";
}
return lhs_has_optional(node, output);
});
PARENS(AST_Call, function(output) {
var node = this;
var p = output.parent();
if (p instanceof AST_New) return p.expression === this;
if (p instanceof AST_New) return p.expression === node;
// https://bugs.webkit.org/show_bug.cgi?id=123506
if (output.option("webkit")) {
if (output.option("webkit")
&& node.expression instanceof AST_Function
&& p instanceof AST_PropAccess
&& p.expression === node) {
var g = output.parent(1);
return this.expression instanceof AST_Function
&& p instanceof AST_PropAccess
&& p.expression === this
&& g instanceof AST_Assign
&& g.left === p;
if (g instanceof AST_Assign && g.left === p) return true;
}
return lhs_has_optional(node, output);
});
PARENS(AST_New, function(output) {