def checkSubIndent(s,l,t):
cur_col = col(l,s)
if cur_col > indent_stack[-1]:
indent_stack.append(cur_col)
else:
raise ParseException(s, l, "not a subentry")
def checkUnindent(s,l,t):
if l >= len(s):
return
cur_col = col(l,s)
if not(cur_col < indent_stack[-1] and cur_col <= indent_stack[-2]):
raise ParseException(s, l, "not an unindent")
def checkPeerIndent(s,l,t):
cur_col = col(l,s)
if cur_col != indent_stack[-1]:
if (not indent_stack) or cur_col > indent_stack[-1]:
raise ParseFatalException(s, l, "illegal nesting")
raise ParseException(s, l, "not a peer entry")
