readValue

import mir.deser.text.tokenizer : tokenizeString;
import mir.deser.text.tokens : IonTokenType;

void testVal(IonTokenType token)(string ts, string expected, char after) {
    auto t = tokenizeString(ts);
    assert(t.nextToken());
    assert(t.currentToken == token);
    auto v = readValue!(token)(t);
    assert(v.matchedText == expected);
    assert(t.readInput() == after);
}
with (IonTokenType) {
    testVal!(TokenNumber)("123123", "123123", 0);
}