Grammalecte  Diff

## functions to get text outside pattern scope

# warning: check compile_rules.py to understand how it works

def nextword (s, iStart, n):
    "get the nth word of the input string or empty string"
    m = re.match("( +[\\w%-]+){" + str(n-1) + "} +([\\w%-]+)", s[iStart:])
    m = re.match("(?: +[\\w%-]+){" + str(n-1) + "} +([\\w%-]+)", s[iStart:])
    if not m:
        return None
    return (iStart+m.start(2), m.group(2))
    return (iStart+m.start(1), m.group(1))


def prevword (s, iEnd, n):
    "get the (-)nth word of the input string or empty string"
    m = re.search("([\\w%-]+) +([\\w%-]+ +){" + str(n-1) + "}$", s[:iEnd])
    m = re.search("([\\w%-]+) +(?:[\\w%-]+ +){" + str(n-1) + "}$", s[:iEnd])
    if not m:
        return None
    return (m.start(1), m.group(1))


def nextword1 (s, iStart):
    "get next word (optimization)"