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support exponentiation operator (#4593)

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This commit is contained in:
Alex Lam S.L
2021-01-24 21:48:51 +00:00
committed by GitHub
parent a08d42555a
commit 9d23ba0a22
6 changed files with 94 additions and 12 deletions
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13
lib/output.js
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@@ -684,6 +684,10 @@ function OutputStream(options) {
PARENS(AST_Unary, function(output) {
var p = output.parent();
// (-x) ** y
if (p instanceof AST_Binary) return p.operator == "**" && p.left === this;
// (x++).toString(3)
// (typeof x).length
return (p instanceof AST_Call || p instanceof AST_PropAccess) && p.expression === this;
});
@@ -722,11 +726,14 @@ function OutputStream(options) {
var p = output.parent();
// await (foo && bar)
if (p instanceof AST_Await) return true;
// this deals with precedence: 3 * (2 + 1)
// this deals with precedence:
// 3 * (2 + 1)
// 3 - (2 - 1)
// (1 ** 2) ** 3
if (p instanceof AST_Binary) {
var po = p.operator, pp = PRECEDENCE[po];
var so = this.operator, sp = PRECEDENCE[so];
return pp > sp || (pp == sp && this === p.right);
return pp > sp || (pp == sp && this === p[po == "**" ? "left" : "right"]);
}
// (foo && bar)()
if (p instanceof AST_Call) return p.expression === this;
@@ -818,6 +825,8 @@ function OutputStream(options) {
PARENS(AST_Await, function(output) {
var p = output.parent();
// (await x) ** y
if (p instanceof AST_Binary) return p.operator == "**" && p.left === this;
// new (await foo)
// (await foo)(bar)
if (p instanceof AST_Call) return p.expression === this;