fix(es/codegen): Fix placing of comments of yield arguments

[lewisl9029]

Description:

Looks like the bug I ran into had nothing to do with the changes in #7856, since it's reproducible without it. Looks like it might have only surfaced now because #7853 changed the default value of jsc.minify.format.comments? Added a minimal test case here with the expected result.

Here's the actual output:

 export var padding = '';
 export function exec2({ commands }) {
     return __awaiter(this, void 0, void 0, function*() {
         for(let i2 = 0; i2 < commands.length; i2++){
             let command = commands[i2];
             yield // some-comment
             function({ command }) {
                 command();
             }({
                 command,
                 handleError
             });
         }
     });
 }

The comment ends up getting added after the yield, which makes the output invalid.

Going to see if I can figure out a fix tomorrow, but let me know if you have any ideas on where to start looking in the meantime!

[kdy1]

We may need need_paren like in

swc/crates/swc_ecma_codegen/src/lib.rs

Lines 2936 to 2940 in 5ae2e81

	let need_paren = n
	.arg
	.as_deref()
	.map(|expr| self.has_leading_comment(expr))
	.unwrap_or(false);

for emit_yield_expr too.

swc/crates/swc_ecma_codegen/src/lib.rs

Lines 1882 to 1886 in 5ae2e81

	if !node.delegate && arg.starts_with_alpha_num() {
	space!()
	} else {
	formatting_space!()
	}

[lewisl9029]

@kdy1 thank you so much for the suggestion, it worked great!
Added the fix and updated the expected output accordingly in 7d1bc9f

[kdy1]

Thank you!

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swc-bump:

• swc_ecma_codegen

[swc-bot]

Automated review comment generated by auto-rebase script

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