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from __future__ import print_function

import inspect
import os
import pprint
import sys

SEP = '/'

MSG_DIR = 'msg'
SRV_DIR = 'srv'

EXT_MSG = '.msg'
EXT_SRV = '.srv'

## character that designates a constant assignment rather than a field
CONSTCHAR   = '='
COMMENTCHAR = '#'
IODELIM   = '---'


verbose = False


def log_verbose(value):
    global verbose
    verbose = value

def log(*args):
    global verbose
    if verbose:
        print("%s:%d" % inspect.stack()[1][1:3], file=sys.stderr)
        print(' '.join([str(x) for x in args]), file=sys.stderr)

def plog(msg, obj):
    if verbose:
        print("%s:%d" % inspect.stack()[1][1:3], file=sys.stderr)
        print(msg, " ", file=sys.stderr)
        pprint.pprint(obj, file=sys.stderr)

class InvalidMsgSpec(Exception):
    pass

class MsgGenerationException(Exception):
    pass
