decode

dchar decode(UseReplacementDchar useReplacementDchar =  No.useReplacementDchar,  S)(auto  ref  S str,  ref  size_t index) if (!isSomeString!S &&
     isRandomAccessRange!S &&  hasSlicing!S &&  hasLength!S &&  isSomeChar!(ElementType!S))

Decodes and returns the code point starting at str[index]. index is advanced to one past the decoded code point. If the code point is not well-formed, then a UTFException is thrown and index remains unchanged.

decode will only work with strings and random access ranges of code units with length and slicing, whereas decodeFront will work with any input range of code units.

Parameters

`useReplacementDchar`	if invalid UTF, return replacementDchar rather than throwing
`str`	input string or indexable Range
`index`	starting index into s[]; incremented by number of code units processed

Returns

decoded character

Throws

UTFException if str[index] is not the start of a valid UTF

sequence and useReplacementDchar is No.useReplacementDchar

dchar decode(UseReplacementDchar useReplacementDchar =  No.useReplacementDchar,  S)(
 auto  ref  scope  S str,  ref  size_t index) if (isSomeString!S)

@trusted pure

ditto