vbatts/llama.cpp
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Fix new line issue with chat template, disable template when in-prefix/suffix is set (#8203)

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* preserve new line llama_chat_format_single

* disable chat template if in-prefix/suffix is set

* remove redundant change
This commit is contained in:
Xuan Son Nguyen 2024-06-30 20:27:13 +02:00 • committed by GitHub
parent 1c5eba6f8e
commit 9ef0780062
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GPG key ID: B5690EEEBB952194
4 changed files with 23 additions and 9 deletions
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16
common/common.cpp
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@ -1014,16 +1014,19 @@ bool gpt_params_find_arg(int argc, char ** argv, const std::string & arg, gpt_pa
}
if (arg == "--in-prefix-bos") {
params.input_prefix_bos = true;
params.enable_chat_template = false;
return true;
}
if (arg == "--in-prefix") {
CHECK_ARG
params.input_prefix = argv[i];
params.enable_chat_template = false;
return true;
}
if (arg == "--in-suffix") {
CHECK_ARG
params.input_suffix = argv[i];
params.enable_chat_template = false;
return true;
}
if (arg == "--spm-infill") {
@ -1406,7 +1409,7 @@ void gpt_params_print_usage(int /*argc*/, char ** argv, const gpt_params & param
"halt generation at PROMPT, return control in interactive mode\n"
"can be specified more than once for multiple prompts" });
options.push_back({ "main", "-sp, --special", "special tokens output enabled (default: %s)", params.special ? "true" : "false" });
options.push_back({ "main", "-cnv, --conversation", "run in conversation mode (does not print special tokens and suffix/prefix) (default: %s)", params.conversation ? "true" : "false" });
options.push_back({ "main", "-cnv, --conversation", "run in conversation mode (does not print special tokens and suffix/prefix, use default chat template) (default: %s)", params.conversation ? "true" : "false" });
options.push_back({ "main infill", "-i, --interactive", "run in interactive mode (default: %s)", params.interactive ? "true" : "false" });
options.push_back({ "main infill", "-if, --interactive-first", "run in interactive mode and wait for input right away (default: %s)", params.interactive_first ? "true" : "false" });
options.push_back({ "main infill", "-mli, --multiline-input", "allows you to write or paste multiple lines without ending each in '\\'" });
@ -2668,12 +2671,19 @@ std::string llama_chat_format_single(const struct llama_model * model,
const std::vector<llama_chat_msg> & past_msg,
const llama_chat_msg & new_msg,
bool add_ass) {
std::ostringstream ss;
auto fmt_past_msg = llama_chat_apply_template(model, tmpl, past_msg, false);
std::vector<llama_chat_msg> chat_new(past_msg);
// if the past_msg ends with a newline, we must preserve it in the formatted version
if (add_ass && !fmt_past_msg.empty() && fmt_past_msg.back() == '\n') {
ss << "\n";
};
// format chat with new_msg
chat_new.push_back(new_msg);
auto fmt_new_msg = llama_chat_apply_template(model, tmpl, chat_new, add_ass);
auto formatted = fmt_new_msg.substr(fmt_past_msg.size(), fmt_new_msg.size() - fmt_past_msg.size());
return formatted;
// get the diff part
ss << fmt_new_msg.substr(fmt_past_msg.size(), fmt_new_msg.size() - fmt_past_msg.size());
return ss.str();
}
std::string llama_chat_format_example(const struct llama_model * model,