سير العمل البرمجي · فواصل الحقول المهربة

def split_fields(text):
    fields, escaped = [""], False
    for char in text:
        if escaped:
            if char not in "|\\": raise ValueError("unknown escape")
            fields[-1] += char
            escaped = False
        elif char == "\\": escaped = True
        elif char == "|": fields.append("")
        else: fields[-1] += char
    if escaped: raise ValueError("trailing escape")
    return fields