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Lower for-in variable initializers

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This commit is contained in:
Jarred Sumner
2023-04-09 05:07:07 -07:00
parent 21acc50d88
commit c97cb4ec1e
1 changed files with 22 additions and 0 deletions
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22
src/js_parser.zig
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@@ -17623,6 +17623,28 @@ fn NewParser_(
data.value = p.visitExpr(data.value);
data.body = p.visitLoopBody(data.body);
// Check for a variable initializer
if (data.init.data == .s_local and data.init.data.s_local.kind == .k_var) {
// Lower for-in variable initializers in case the output is used in strict mode
var local = data.init.data.s_local;
if (local.decls.len == 1) {
var decl: *G.Decl = &local.decls[0];
if (decl.binding.data == .b_identifier) {
if (decl.value) |val| {
stmts.append(
Stmt.assign(
Expr.initIdentifier(decl.binding.data.b_identifier.ref, decl.binding.loc),
val,
p.allocator,
),
) catch unreachable;
decl.value = null;
}
}
}
}
if (data.init.data == .s_local and data.init.data.s_local.kind == .k_var) {
const relocate = p.maybeRelocateVarsToTopLevel(data.init.data.s_local.decls, RelocateVars.Mode.for_in_or_for_of);
if (relocate.stmt) |relocated_stmt| {