Re: Parsing with ranges

[Tomek Sowiński]

Dnia 22-07-2010 o 15:22:14 %u <e...@sp.am> napisał(a):

How to parse a simple format with ranges? For example a query string format:

string[string] params = parse("foo=1&bar=1%202&baz=1+2+3");
assert(params["foo"] == "1");
assert(params["bar"] == "1 2");
assert(params["baz"] == "1 2 3");

parse() should accept a string, an stream or anything else that make sense.

Something like this (not tested):

import std.algorithm;

string[string] parse(R)(R input) {
string[string] params;
foreach (assignment; splitter(input, '&')) {
    auto a = splitter(assignment, '=');
    string lvalue = a.front;
    a.popFront;
    string rvalue = replace(a.front, '+', ' ');
    params[lvalue] = rvalue;
    a.popFront;
    assert (a.empty);
}
return params;
}

Tomek