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support arrow function (#4385)

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This commit is contained in:
Alex Lam S.L
2020-12-17 10:23:41 +00:00
committed by GitHub
parent 75e9fd8417
commit a96f087ac3
11 changed files with 732 additions and 117 deletions
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8
lib/utils.js
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@@ -238,13 +238,15 @@ function HOP(obj, prop) {
// return true if the node at the top of the stack (that means the
// innermost node in the current output) is lexically the first in
// a statement.
function first_in_statement(stack) {
function first_in_statement(stack, arrow) {
var node = stack.parent(-1);
for (var i = 0, p; p = stack.parent(i++); node = p) {
if (p.TYPE == "Call") {
if (p.expression === node) continue;
if (p instanceof AST_Arrow) {
return arrow && p.value === node;
} else if (p instanceof AST_Binary) {
if (p.left === node) continue;
} else if (p.TYPE == "Call") {
if (p.expression === node) continue;
} else if (p instanceof AST_Conditional) {
if (p.condition === node) continue;
} else if (p instanceof AST_PropAccess) {