getEncoding function
Implementation
Tiktoken getEncoding(String encodingName) {
if (_ENCODINGS.containsKey(encodingName)) {
return _ENCODINGS[encodingName]!;
}
late CoreBPEConstructor constructor;
switch (encodingName) {
case 'cl100k_base':
constructor = CoreBPEConstructor.cl100kBase();
break;
// case 'gpt2':
// constructor = CoreBPEConstructor.gpt2();
// break;
// case 'r50k_base':
// constructor = CoreBPEConstructor.r50kBase();
// break;
// case 'p50k_base':
// constructor = CoreBPEConstructor.p50kBase();
// break;
// case 'p50k_edit':
// constructor = CoreBPEConstructor.p50kEdit();
// break;
default:
throw TiktokenError("Unknown encoding $encodingName");
}
final enc = Tiktoken(
name: constructor.name,
patStr: constructor.patStr,
mergeableRanks: constructor.mergeableRanks,
explicitNVocab: constructor.explicitNVocab,
specialTokens: constructor.specialTokens,
);
_ENCODINGS[encodingName] = enc;
return enc;
}