# File: regex-syntax-example-1.py

import regex_syntax
import regex

def compile(pattern, syntax):
    syntax = regex.set_syntax(syntax)
    try:
        pattern = regex.compile(pattern)
    finally:
        # restore original syntax
        regex.set_syntax(syntax)
    return pattern

def compile_awk(pattern):
    return compile(pattern, regex_syntax.RE_SYNTAX_AWK)

def compile_grep(pattern):
    return compile(pattern, regex_syntax.RE_SYNTAX_GREP)

def compile_emacs(pattern):
    return compile(pattern, regex_syntax.RE_SYNTAX_EMACS)