findNextContainerMember

fn findNextContainerMember(p: *Parse) void {
    if (!p.recover) {
        while (p.tokenTag(p.tok_i) != .eof) {
            p.tok_i += 1;
        }
        return;
    }
    var level: u32 = 0;
    while (true) {
        const tok = p.nextToken();
        switch (p.tokenTag(tok)) {
            // Any of these can start a new top level declaration.
            .keyword_test,
            .keyword_comptime,
            .keyword_pub,
            .keyword_export,
            .keyword_extern,
            .keyword_inline,
            .keyword_noinline,
            .keyword_threadlocal,
            .keyword_const,
            .keyword_var,
            .keyword_fn,
            => {
                if (level == 0) {
                    p.tok_i -= 1;
                    return;
                }
            },
            .identifier => {
                if (p.tokenTag(tok + 1) == .comma and level == 0) {
                    p.tok_i -= 1;
                    return;
                }
            },
            .comma, .semicolon => {
                // this decl was likely meant to end here
                if (level == 0) {
                    return;
                }
            },
            .l_paren, .l_bracket, .l_brace => level += 1,
            .r_paren, .r_bracket => {
                if (level != 0) level -= 1;
            },
            .r_brace => {
                if (level == 0) {
                    // end of container, exit
                    p.tok_i -= 1;
                    return;
                }
                level -= 1;
            },
            .eof => {
                p.tok_i -= 1;
                return;
            },
            else => {},
        }
    }
}