Support for multiple reverse prompts. (#299)

Co-authored-by: Johnman <>
Co-authored-by: Johnman <tjohnman@github>

main.cpp

@@ -855,14 +855,18 @@ int main(int argc, char ** argv) {
     // in instruct mode, we inject a prefix and a suffix to each input by the user
     if (params.instruct) {
         params.interactive = true;
-        params.antiprompt = "### Instruction:\n\n";
+        params.antiprompt.push_back("### Instruction:\n\n");
     }
 
     // tokenize the reverse prompt
-    std::vector<gpt_vocab::id> antiprompt_inp = ::llama_tokenize(vocab, params.antiprompt, false);
+    std::vector<std::vector<gpt_vocab::id>> antipromptv_inp;
+    
+    for (auto antiprompt : params.antiprompt) {
+        antipromptv_inp.push_back(::llama_tokenize(vocab, antiprompt, false));
+    }
 
     // enable interactive mode if reverse prompt is specified
-    if (!antiprompt_inp.empty()) {
+    if (!antipromptv_inp.size()) {
         params.interactive = true;
     }
 
@@ -886,13 +890,16 @@ int main(int argc, char ** argv) {
 
         fprintf(stderr, "%s: interactive mode on.\n", __func__);
 
-        if (antiprompt_inp.size()) {
+        if(antipromptv_inp.size()) {
-            fprintf(stderr, "%s: reverse prompt: '%s'\n", __func__, params.antiprompt.c_str());
+            for (size_t apindex = 0; apindex < antipromptv_inp.size(); ++apindex) {
-            fprintf(stderr, "%s: number of tokens in reverse prompt = %zu\n", __func__, antiprompt_inp.size());
+                auto antiprompt_inp = antipromptv_inp.at(apindex);
-            for (int i = 0; i < (int) antiprompt_inp.size(); i++) {
+                fprintf(stderr, "%s: reverse prompt: '%s'\n", __func__, params.antiprompt.at(apindex).c_str());
-                fprintf(stderr, "%6d -> '%s'\n", antiprompt_inp[i], vocab.id_to_token.at(antiprompt_inp[i]).c_str());
+                fprintf(stderr, "%s: number of tokens in reverse prompt = %zu\n", __func__, antiprompt_inp.size());
+                for (int i = 0; i < (int) antiprompt_inp.size(); i++) {
+                    fprintf(stderr, "%6d -> '%s'\n", antiprompt_inp[i], vocab.id_to_token.at(antiprompt_inp[i]).c_str());
+                }
+                fprintf(stderr, "\n");
             }
-            fprintf(stderr, "\n");
         }
     }
     fprintf(stderr, "sampling parameters: temp = %f, top_k = %d, top_p = %f, repeat_last_n = %i, repeat_penalty = %f\n", params.temp, params.top_k, params.top_p, params.repeat_last_n, params.repeat_penalty);
@@ -1009,9 +1016,12 @@ int main(int argc, char ** argv) {
         // check if we should prompt the user for more
         if (params.interactive && embd_inp.size() <= input_consumed) {
             // check for reverse prompt
-            if (antiprompt_inp.size() && std::equal(antiprompt_inp.rbegin(), antiprompt_inp.rend(), last_n_tokens.rbegin())) {
+            for (auto antiprompt_inp : antipromptv_inp) {
-                // reverse prompt found
+                if (antiprompt_inp.size() && std::equal(antiprompt_inp.rbegin(), antiprompt_inp.rend(), last_n_tokens.rbegin())) {
-                is_interacting = true;
+                    // reverse prompt found
+                    is_interacting = true;
+                    break;
+                }
             }
             if (is_interacting) {
                 if (params.instruct) {

utils.cpp

@@ -70,7 +70,7 @@ bool gpt_params_parse(int argc, char ** argv, gpt_params & params) {
         } else if (arg == "--color") {
             params.use_color = true;
         } else if (arg == "-r" || arg == "--reverse-prompt") {
-            params.antiprompt = argv[++i];
+            params.antiprompt.push_back(argv[++i]);
         } else if (arg == "--ignore-eos") {
             params.ignore_eos = true;
         } else if (arg == "-h" || arg == "--help") {
@@ -96,7 +96,8 @@ void gpt_print_usage(int /*argc*/, char ** argv, const gpt_params & params) {
     fprintf(stderr, "  -i, --interactive     run in interactive mode\n");
     fprintf(stderr, "  -ins, --instruct      run in instruction mode (use with Alpaca models)\n");
     fprintf(stderr, "  -r PROMPT, --reverse-prompt PROMPT\n");
-    fprintf(stderr, "                        in interactive mode, poll user input upon seeing PROMPT\n");
+    fprintf(stderr, "                        in interactive mode, poll user input upon seeing PROMPT (can be\n");
+    fprintf(stderr, "                        specified more than once for multiple prompts).\n");
     fprintf(stderr, "  --color               colorise output to distinguish prompt and user input from generations\n");
     fprintf(stderr, "  -s SEED, --seed SEED  RNG seed (default: -1)\n");
     fprintf(stderr, "  -t N, --threads N     number of threads to use during computation (default: %d)\n", params.n_threads);

utils.h

@@ -30,15 +30,15 @@ struct gpt_params {
 
     std::string model      = "models/lamma-7B/ggml-model.bin"; // model path
     std::string prompt     = "";
-    std::string antiprompt = ""; // string upon seeing which more user input is prompted
 
     bool random_prompt = false;
 
     bool use_color = false; // use color to distinguish generations and inputs
 
     bool interactive = false; // interactive mode
+    bool interactive_start = false; // reverse prompt immediately
+    std::vector<std::string> antiprompt; // string upon seeing which more user input is prompted
     bool instruct    = false; // instruction mode (used for Alpaca models)
-    
     bool ignore_eos = false; // do not stop generating after eos
 };