true if c may be emitted literally (ASCII) without percent-encoding.isUriTemplateAllowed
private fn
bool isUriTemplateAllowed(dchar c, bool allowReserved) @nogc nothrow @safeReturns true if c is allowed unescaped by URI Template encoding.
In RFC 6570, most operators allow only RFC 3986 unreserved characters. The reserved operators (`+` and `#`) additionally allow reserved characters.
Parameters
c | Code point to test. |
allowReserved | Whether reserved characters are allowed. |