Support for multiple reverse prompts. (#299)

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

1 files changed, 22 insertions, 12 deletions

diff --git a/main.cpp b/main.cpp
index 6c78cb0..38d1192 100644
--- a/main.cpp
+++ b/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()) {
-            fprintf(stderr, "%s: reverse prompt: '%s'\n", __func__, params.antiprompt.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());
+        if(antipromptv_inp.size()) {
+            for (size_t apindex = 0; apindex < antipromptv_inp.size(); ++apindex) {
+                auto antiprompt_inp = antipromptv_inp.at(apindex);
+                fprintf(stderr, "%s: reverse prompt: '%s'\n", __func__, params.antiprompt.at(apindex).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())) {
-                // reverse prompt found
-                is_interacting = true;
+            for (auto antiprompt_inp : antipromptv_inp) {
+                if (antiprompt_inp.size() && std::equal(antiprompt_inp.rbegin(), antiprompt_inp.rend(), last_n_tokens.rbegin())) {
+                    // reverse prompt found
+                    is_interacting = true;
+                    break;
+                }
             }
             if (is_interacting) {
                 if (params.instruct) {