model: handle multiple eos tokens (#10577)

* get eos_token_id from generation_config.json

* refactor

* include both ids and strings in trace

* comments

* remove special case for gemma3 special vocab (#10743)

convert/convert.go

@@ -53,8 +53,11 @@ func (ModelParameters) KV(t *Tokenizer) ggml.KV {
 	}
 
 	for _, sv := range t.SpecialVocabulary {
-		kv[fmt.Sprintf("tokenizer.ggml.%s_token_id", sv.Key())] = uint32(sv.ID)
 		kv[fmt.Sprintf("tokenizer.ggml.add_%s_token", sv.Key())] = sv.AddToken
+		kv[fmt.Sprintf("tokenizer.ggml.%s_token_id", sv.Key())] = uint32(sv.ID)
+		if len(sv.IDs) > 0 {
+			kv[fmt.Sprintf("tokenizer.ggml.%s_token_ids", sv.Key())] = sv.IDs
+		}
 	}
 
 	return kv

convert/tokenizer.go

@@ -110,6 +110,7 @@ func parseTokenizer(fsys fs.FS, specialTokenTypes []string) (*Tokenizer, error)
 	}
 
 	if f, err := fsys.Open("tokenizer_config.json"); errors.Is(err, os.ErrNotExist) {
+		// noop
 	} else if err != nil {
 		return nil, err
 	} else {
@@ -171,6 +172,34 @@ func parseTokenizer(fsys fs.FS, specialTokenTypes []string) (*Tokenizer, error)
 		}
 	}
 
+	if f, err := fsys.Open("generation_config.json"); errors.Is(err, os.ErrNotExist) {
+	} else if err != nil {
+		return nil, err
+	} else {
+		defer f.Close()
+
+		var p map[string]json.RawMessage
+		if err := json.NewDecoder(f).Decode(&p); err != nil {
+			return nil, err
+		}
+
+		for _, st := range specialTokenTypes {
+			if bts, ok := p[fmt.Sprintf("%s_token_id", st)]; ok {
+				var ids []int32
+				if err := json.Unmarshal(bts, &ids); err != nil {
+					// value is not a list so the existing ID is used
+					continue
+				}
+
+				if i := slices.IndexFunc(t.SpecialVocabulary, func(sv *SpecialVocabulary) bool {
+					return sv.Type == st
+				}); i >= 0 {
+					t.SpecialVocabulary[i].IDs = ids
+				}
+			}
+		}
+	}
+
 	return t, nil
 }
 
@@ -280,6 +309,9 @@ type SpecialVocabulary struct {
 	ID       int
 	Content  string
 	AddToken bool
+
+	// IDs is populated by generation_config.json
+	IDs []int32
 }
 
 func (sv SpecialVocabulary) Key() string {

convert/tokenizer_test.go

@@ -247,6 +247,67 @@ func TestParseTokenizer(t *testing.T) {
 				Pre: "default",
 			},
 		},
+		{
+			name: "generation config eos token ids",
+			fsys: createTokenizerFS(t, t.TempDir(), map[string]io.Reader{
+				"tokenizer.json": strings.NewReader(`{
+					"added_tokens": [
+						{
+							"id": 0,
+							"content": "<bos>",
+							"special": true
+						},
+						{
+							"id": 1,
+							"content": "<eos>",
+							"special": true
+						},
+						{
+							"id": 2,
+							"content": "<eot>",
+							"special": true
+						},
+						{
+							"id": 3,
+							"content": "<eom>",
+							"special": true
+						}
+					],
+					"model": {
+						"vocab": {
+							"<bos>": 0,
+							"<eos>": 1,
+							"<eot>": 2,
+							"<eom>": 3
+						}
+					}
+				}`),
+				"tokenizer_config.json": strings.NewReader(`{
+					"add_bos_token": true,
+					"add_eos_token": false,
+					"bos_token": "<bos>",
+					"eos_token": "<eos>"
+				}`),
+				"generation_config.json": strings.NewReader(`{
+					"bos_token_id": 0,
+					"eos_token_id": [1, 2, 3]
+				}`),
+			}),
+			specialTokenTypes: []string{"pad", "eos", "bos", "unk"},
+			want: &Tokenizer{
+				Vocabulary: &Vocabulary{
+					Model:  "gpt2",
+					Tokens: []string{"<bos>", "<eos>", "<eot>", "<eom>"},
+					Scores: []float32{0, 1, 2, 3},
+					Types:  []int32{3, 3, 3, 3},
+				},
+				SpecialVocabulary: []*SpecialVocabulary{
+					{Type: "eos", Content: "<eos>", ID: 1, IDs: []int32{1, 2, 3}, AddToken: false},
+					{Type: "bos", Content: "<bos>", ID: 0, AddToken: true},
+				},
+				Pre: "default",
+			},
+		},
 	}
 
 	for _, tt := range cases {

llama/llama.go

@@ -602,7 +602,7 @@ type Grammar struct {
 	mu sync.Mutex
 }
 
-func NewGrammar(grammar string, vocabIds []uint32, vocabValues []string, eogTokens []uint32) *Grammar {
+func NewGrammar(grammar string, vocabIds []uint32, vocabValues []string, eogTokens []int32) *Grammar {
 	cGrammar := C.CString(grammar)
 	defer C.free(unsafe.Pointer(cGrammar))
 
@@ -622,7 +622,7 @@ func NewGrammar(grammar string, vocabIds []uint32, vocabValues []string, eogToke
 		cEogTokens[i] = C.uint32_t(token)
 	}
 
-	g := C.grammar_init(cGrammar, (*C.uint32_t)(unsafe.Pointer(&cTokens[0])), C.size_t(len(cTokens)), (**C.char)(unsafe.Pointer(&cPieces[0])), (*C.uint32_t)(unsafe.Pointer(&cEogTokens[0])), C.size_t(len(cEogTokens)))
+	g := C.grammar_init(cGrammar, unsafe.SliceData(cTokens), C.size_t(len(cTokens)), unsafe.SliceData(cPieces), unsafe.SliceData(cEogTokens), C.size_t(len(cEogTokens)))
 	if g == nil {
 		return nil
 	}

model/process_text.go → model/bytepairencoding.go

@@ -5,116 +5,13 @@ import (
 	"context"
 	"iter"
 	"log/slog"
-	"slices"
 	"strings"
-	"sync"
 
 	"github.com/dlclark/regexp2"
 	heap "github.com/emirpasic/gods/v2/trees/binaryheap"
 	"github.com/ollama/ollama/logutil"
 )
 
-type Special int32
-
-const (
-	SpecialBOS Special = iota
-	SpecialEOS
-)
-
-const (
-	TOKEN_TYPE_NORMAL = iota + 1
-	TOKEN_TYPE_UNKNOWN
-	TOKEN_TYPE_CONTROL
-	TOKEN_TYPE_USER_DEFINED
-	TOKEN_TYPE_UNUSED
-	TOKEN_TYPE_BYTE
-)
-
-type TextProcessor interface {
-	Encode(s string, addSpecial bool) ([]int32, error)
-	Decode([]int32) (string, error)
-	Is(int32, Special) bool
-	Vocabulary() *Vocabulary
-}
-
-type Vocabulary struct {
-	Values []string
-	Types  []int32
-	Scores []float32
-	Merges []string
-
-	BOS, EOS, EOT          int32
-	AddBOS, AddEOS, AddEOT bool
-
-	specialOnce sync.Once
-	special     []string
-
-	valuesOnce sync.Once
-	values     map[string]int32
-
-	mergeOnce sync.Once
-	merge     map[string]int32
-}
-
-func (v *Vocabulary) Is(id int32, special Special) bool {
-	switch special {
-	case SpecialBOS:
-		return id == v.BOS
-	case SpecialEOS:
-		return id == v.EOS || id == v.EOT
-	default:
-		return false
-	}
-}
-
-func (v *Vocabulary) Encode(s string) int32 {
-	v.valuesOnce.Do(func() {
-		v.values = make(map[string]int32, len(v.Values))
-		for i, value := range v.Values {
-			v.values[value] = int32(i)
-		}
-	})
-
-	if id, ok := v.values[s]; ok {
-		return id
-	}
-
-	return -1
-}
-
-func (v *Vocabulary) Decode(id int32) string {
-	return v.Values[id]
-}
-
-func (v *Vocabulary) SpecialVocabulary() []string {
-	v.specialOnce.Do(func() {
-		for i := range v.Values {
-			if slices.Contains([]int{105, 106}, i) {
-				v.special = append(v.special, v.Values[i])
-			} else if v.Types[i] == TOKEN_TYPE_CONTROL {
-				v.special = append(v.special, v.Values[i])
-			}
-		}
-	})
-
-	return v.special
-}
-
-func (v *Vocabulary) Merge(left, right string) int {
-	v.mergeOnce.Do(func() {
-		v.merge = make(map[string]int32, len(v.Merges))
-		for i, merge := range v.Merges {
-			v.merge[merge] = int32(i)
-		}
-	})
-
-	if id, ok := v.merge[left+" "+right]; ok {
-		return int(id)
-	}
-
-	return -1
-}
-
 type BytePairEncoding struct {
 	pre   *regexp2.Regexp
 	vocab *Vocabulary
@@ -304,27 +201,12 @@ func (bpe BytePairEncoding) Encode(s string, addSpecial bool) ([]int32, error) {
 		}
 	}
 
-	if addSpecial && len(ids) > 0 {
-		if bpe.vocab.AddBOS {
-			if ids[0] == bpe.vocab.BOS {
-				slog.Warn("adding bos token to prompt which already has it", "id", bpe.vocab.BOS)
-			}
-
-			slog.Debug("adding bos token to prompt", "id", bpe.vocab.BOS)
-			ids = append([]int32{bpe.vocab.BOS}, ids...)
-		}
-
-		if bpe.vocab.AddEOS {
-			if ids[len(ids)-1] == bpe.vocab.EOS {
-				slog.Warn("adding eos token to prompt which already has it", "id", bpe.vocab.EOS)
-			}
+	slog.Log(context.TODO(), logutil.LevelTrace, "encoded", "string", s, "ids", ids)
 
-			slog.Debug("adding eos token to prompt", "id", bpe.vocab.EOS)
-			ids = append(ids, bpe.vocab.EOS)
-		}
+	if addSpecial && len(ids) > 0 {
+		ids = bpe.vocab.addSpecials(ids)
 	}
 
-	slog.Log(context.TODO(), logutil.LevelTrace, "encoded", "ids", ids)
 	return ids, nil
 }
 
@@ -352,6 +234,6 @@ func (bpe BytePairEncoding) Decode(ids []int32) (string, error) {
 		}
 	}
 
-	slog.Log(context.TODO(), logutil.LevelTrace, "decoded", "string", sb.String())
+	slog.Log(context.TODO(), logutil.LevelTrace, "decoded", "ids", ids, "string", sb.String())
 	return sb.String(), nil
 }

model/models/gemma2/model.go

@@ -43,10 +43,13 @@ func New(c fs.Config) (model.Model, error) {
 				Values: c.Strings("tokenizer.ggml.tokens"),
 				Scores: c.Floats("tokenizer.ggml.scores"),
 				Types:  c.Ints("tokenizer.ggml.token_type"),
-				BOS:    int32(c.Uint("tokenizer.ggml.bos_token_id")),
-				EOS:    int32(c.Uint("tokenizer.ggml.eos_token_id")),
-				// TODO: set EOT to EOS otherwise 0 will stop generation
-				EOT: int32(c.Uint("tokenizer.ggml.eos_token_id")),
+				AddBOS: c.Bool("tokenizer.ggml.add_bos_token", true),
+				BOS:    []int32{int32(c.Uint("tokenizer.ggml.bos_token_id"))},
+				AddEOS: c.Bool("tokenizer.ggml.add_eos_token", false),
+				EOS: append(
+					[]int32{int32(c.Uint("tokenizer.ggml.eos_token_id"))},
+					c.Ints("tokenizer.ggml.eos_token_ids")...,
+				),
 			},
 		),
 		Layers: make([]Layer, c.Uint("block_count")),

model/models/gemma3/model.go

@@ -60,12 +60,16 @@ func New(c fs.Config) (model.Model, error) {
 				Values: c.Strings("tokenizer.ggml.tokens"),
 				Scores: c.Floats("tokenizer.ggml.scores"),
 				Types:  c.Ints("tokenizer.ggml.token_type"),
-				BOS:    int32(c.Uint("tokenizer.ggml.bos_token_id")),
 				AddBOS: c.Bool("tokenizer.ggml.add_bos_token", true),
-				EOS:    int32(1),
+				BOS:    []int32{int32(c.Uint("tokenizer.ggml.bos_token_id"))},
 				AddEOS: c.Bool("tokenizer.ggml.add_eos_token", false),
-				EOT:    int32(106),
-				AddEOT: c.Bool("tokenizer.ggml.add_eot_token", false),
+				EOS: append(
+					[]int32{
+						int32(c.Uint("tokenizer.ggml.eos_token_id")),
+						int32(c.Uint("tokenizer.ggml.eot_token_id", 106)),
+					},
+					c.Ints("tokenizer.ggml.eos_token_ids")...,
+				),
 			},
 		),
 		ImageProcessor: newImageProcessor(c),

model/models/llama/model.go

@@ -43,13 +43,13 @@ func New(c fs.Config) (model.Model, error) {
 				Values: c.Strings("tokenizer.ggml.tokens"),
 				Types:  c.Ints("tokenizer.ggml.token_type"),
 				Merges: c.Strings("tokenizer.ggml.merges"),
-				BOS:    int32(c.Uint("tokenizer.ggml.bos_token_id")),
 				AddBOS: c.Bool("tokenizer.ggml.add_bos_token", true),
-				EOS:    int32(c.Uint("tokenizer.ggml.eos_token_id")),
+				BOS:    []int32{int32(c.Uint("tokenizer.ggml.bos_token_id"))},
 				AddEOS: c.Bool("tokenizer.ggml.add_eos_token", false),
-				// TODO: set EOT to EOS otherwise 0 will stop generation
-				EOT:    int32(c.Uint("tokenizer.ggml.eos_token_id")),
-				AddEOT: c.Bool("tokenizer.ggml.add_eos_token", false),
+				EOS: append(
+					[]int32{int32(c.Uint("tokenizer.ggml.eos_token_id"))},
+					c.Ints("tokenizer.ggml.eos_token_ids")...,
+				),
 			},
 		),
 		Layers: make([]Layer, c.Uint("block_count")),

model/models/llama4/model.go

@@ -40,13 +40,13 @@ func New(c fs.Config) (model.Model, error) {
 				Values: c.Strings("tokenizer.ggml.tokens"),
 				Types:  c.Ints("tokenizer.ggml.token_type"),
 				Merges: c.Strings("tokenizer.ggml.merges"),
-				BOS:    int32(c.Uint("tokenizer.ggml.bos_token_id")),
 				AddBOS: c.Bool("tokenizer.ggml.add_bos_token", true),
-				EOS:    int32(c.Uint("tokenizer.ggml.eos_token_id")),
+				BOS:    []int32{int32(c.Uint("tokenizer.ggml.bos_token_id"))},
 				AddEOS: c.Bool("tokenizer.ggml.add_eos_token", false),
-				// TODO: set EOT to EOS otherwise 0 will stop generation
-				EOT:    int32(c.Uint("tokenizer.ggml.eos_token_id")),
-				AddEOT: c.Bool("tokenizer.ggml.add_eos_token", false),
+				EOS: append(
+					[]int32{int32(c.Uint("tokenizer.ggml.eos_token_id"))},
+					c.Ints("tokenizer.ggml.eos_token_ids")...,
+				),
 			},
 		),
 		ImageProcessor: newImageProcessor(c),

model/models/mistral3/model.go

@@ -37,25 +37,25 @@ func New(c fs.Config) (model.Model, error) {
 	}
 
 	m := &Model{
-		TextModel:           textModel,
-		VisionModel:         newVisionModel(c),
-		ImageProcessor:      newImageProcessor(c),
-		MultiModalProjector: newMultiModalProjector(c),
 		BytePairEncoding: model.NewBytePairEncoding(
 			c.String("tokenizer.ggml.pretokenizer", `[^\r\n\p{L}\p{N}]?[\p{Lu}\p{Lt}\p{Lm}\p{Lo}\p{M}]*[\p{Ll}\p{Lm}\p{Lo}\p{M}]+|[^\r\n\p{L}\p{N}]?[\p{Lu}\p{Lt}\p{Lm}\p{Lo}\p{M}]+[\p{Ll}\p{Lm}\p{Lo}\p{M}]*|\p{N}| ?[^\s\p{L}\p{N}]+[\r\n/]*|\s*[\r\n]+|\s+(?!\S)|\s+`),
 			&model.Vocabulary{
 				Values: c.Strings("tokenizer.ggml.tokens"),
 				Types:  c.Ints("tokenizer.ggml.token_type"),
 				Merges: c.Strings("tokenizer.ggml.merges"),
-				BOS:    int32(c.Uint("tokenizer.ggml.bos_token_id", 1)),
 				AddBOS: c.Bool("tokenizer.ggml.add_bos_token", true),
-				EOS:    int32(c.Uint("tokenizer.ggml.eos_token_id", 2)),
+				BOS:    []int32{int32(c.Uint("tokenizer.ggml.bos_token_id"))},
 				AddEOS: c.Bool("tokenizer.ggml.add_eos_token", false),
-				// TODO: set EOT to EOS otherwise 0 will stop generation
-				EOT:    int32(c.Uint("tokenizer.ggml.eos_token_id")),
-				AddEOT: c.Bool("tokenizer.ggml.add_eos_token", false),
+				EOS: append(
+					[]int32{int32(c.Uint("tokenizer.ggml.eos_token_id"))},
+					c.Ints("tokenizer.ggml.eos_token_ids")...,
+				),
 			},
 		),
+		TextModel:           textModel,
+		VisionModel:         newVisionModel(c),
+		ImageProcessor:      newImageProcessor(c),
+		MultiModalProjector: newMultiModalProjector(c),
 	}
 
 	m.Cache = kvcache.NewCausalCache(m.TextModel.Shift)

model/models/mllama/model.go

@@ -38,13 +38,13 @@ func New(c fs.Config) (model.Model, error) {
 				Values: c.Strings("tokenizer.ggml.tokens"),
 				Types:  c.Ints("tokenizer.ggml.token_type"),
 				Merges: c.Strings("tokenizer.ggml.merges"),
-				BOS:    int32(c.Uint("tokenizer.ggml.bos_token_id")),
 				AddBOS: c.Bool("tokenizer.ggml.add_bos_token", true),
-				EOS:    int32(c.Uint("tokenizer.ggml.eos_token_id")),
+				BOS:    []int32{int32(c.Uint("tokenizer.ggml.bos_token_id"))},
 				AddEOS: c.Bool("tokenizer.ggml.add_eos_token", false),
-				// TODO: set EOT to EOS otherwise 0 will stop generation
-				EOT:    int32(c.Uint("tokenizer.ggml.eos_token_id")),
-				AddEOT: c.Bool("tokenizer.ggml.add_eos_token", false),
+				EOS: append(
+					[]int32{int32(c.Uint("tokenizer.ggml.eos_token_id"))},
+					c.Ints("tokenizer.ggml.eos_token_ids")...,
+				),
 			},
 		),
 		ImageProcessor: newImageProcessor(c),

model/models/qwen25vl/model.go

@@ -34,12 +34,13 @@ func New(c fs.Config) (model.Model, error) {
 				Values: c.Strings("tokenizer.ggml.tokens"),
 				Types:  c.Ints("tokenizer.ggml.token_type"),
 				Merges: c.Strings("tokenizer.ggml.merges"),
-				BOS:    int32(c.Uint("tokenizer.ggml.bos_token_id")),
-				AddBOS: c.Bool("tokenizer.ggml.add_bos_token", false),
-				EOS:    int32(c.Uint("tokenizer.ggml.eos_token_id")),
+				AddBOS: c.Bool("tokenizer.ggml.add_bos_token", true),
+				BOS:    []int32{int32(c.Uint("tokenizer.ggml.bos_token_id"))},
 				AddEOS: c.Bool("tokenizer.ggml.add_eos_token", false),
-				EOT:    int32(c.Uint("tokenizer.ggml.eos_token_id")),
-				AddEOT: c.Bool("tokenizer.ggml.add_eos_token", false),
+				EOS: append(
+					[]int32{int32(c.Uint("tokenizer.ggml.eos_token_id"))},
+					c.Ints("tokenizer.ggml.eos_token_ids")...,
+				),
 			},
 		),
 		TextModel:      NewTextModel(c),

model/process_text_spm.go → model/sentencepiece.go

@@ -182,27 +182,12 @@ func (spm SentencePieceModel) Encode(s string, addSpecial bool) ([]int32, error)
 		}
 	}
 
-	if addSpecial && len(ids) > 0 {
-		if spm.vocab.AddBOS {
-			if ids[0] == spm.vocab.BOS {
-				slog.Warn("adding bos token to prompt which already has it", "id", spm.vocab.BOS)
-			}
-
-			slog.Debug("adding bos token to prompt", "id", spm.vocab.BOS)
-			ids = append([]int32{spm.vocab.BOS}, ids...)
-		}
+	slog.Log(context.TODO(), logutil.LevelTrace, "encoded", "string", s, "ids", ids)
 
-		if spm.vocab.AddEOS {
-			if ids[len(ids)-1] == spm.vocab.EOS {
-				slog.Warn("adding eos token to prompt which already has it", "id", spm.vocab.EOS)
-			}
-
-			slog.Debug("adding eos token to prompt", "id", spm.vocab.EOS)
-			ids = append(ids, spm.vocab.EOS)
-		}
+	if addSpecial && len(ids) > 0 {
+		ids = spm.vocab.addSpecials(ids)
 	}
 
-	slog.Log(context.TODO(), logutil.LevelTrace, "encoded", "ids", ids)
 	return ids, nil
 }
 
@@ -261,6 +246,6 @@ func (spm SentencePieceModel) Decode(ids []int32) (string, error) {
 		}
 	}
 
-	slog.Log(context.TODO(), logutil.LevelTrace, "decoded", "string", sb.String())
+	slog.Log(context.TODO(), logutil.LevelTrace, "decoded", "ids", ids, "string", sb.String())
 	return sb.String(), nil
 }

model/textprocessor.go

+package model
+
+const (
+	TOKEN_TYPE_NORMAL = iota + 1
+	TOKEN_TYPE_UNKNOWN
+	TOKEN_TYPE_CONTROL
+	TOKEN_TYPE_USER_DEFINED
+	TOKEN_TYPE_UNUSED
+	TOKEN_TYPE_BYTE
+)
+
+type TextProcessor interface {
+	Encode(s string, addSpecial bool) ([]int32, error)
+	Decode([]int32) (string, error)
+	Is(int32, Special) bool
+	Vocabulary() *Vocabulary
+}

model/vocabulary.go

+package model
+
+import (
+	"log/slog"
+	"slices"
+	"sync"
+)
+
+type Special int32
+
+const (
+	SpecialBOS Special = iota
+	SpecialEOS
+)
+
+type Vocabulary struct {
+	Values []string
+	Types  []int32
+	Scores []float32
+	Merges []string
+
+	BOS, EOS       []int32
+	AddBOS, AddEOS bool
+
+	specialOnce sync.Once
+	special     []string
+
+	valuesOnce sync.Once
+	values     map[string]int32
+
+	mergeOnce sync.Once
+	merge     map[string]int32
+}
+
+func (v *Vocabulary) Is(id int32, special Special) bool {
+	switch special {
+	case SpecialBOS:
+		return slices.Contains(v.BOS, id)
+	case SpecialEOS:
+		return slices.Contains(v.EOS, id)
+	default:
+		return false
+	}
+}
+
+func (v *Vocabulary) addSpecials(ids []int32) []int32 {
+	if v.AddBOS && len(v.BOS) > 0 {
+		if slices.Contains(v.BOS, ids[0]) {
+			slog.Warn("adding bos token to prompt which already has it", "id", v.BOS)
+		}
+
+		slog.Debug("adding bos token to prompt", "id", v.BOS)
+		ids = append([]int32{v.BOS[0]}, ids...)
+	}
+
+	if v.AddEOS && len(v.EOS) > 0 {
+		if slices.Contains(v.BOS, ids[len(ids)-1]) {
+			slog.Warn("adding eos token to prompt which already has it", "id", v.EOS)
+		}
+
+		slog.Debug("adding eos token to prompt", "id", v.EOS)
+		ids = append(ids, v.EOS[0])
+	}
+
+	return ids
+}
+
+func (v *Vocabulary) Encode(s string) int32 {
+	v.valuesOnce.Do(func() {
+		v.values = make(map[string]int32, len(v.Values))
+		for i, value := range v.Values {
+			v.values[value] = int32(i)
+		}
+	})
+
+	if id, ok := v.values[s]; ok {
+		return id
+	}
+
+	return -1
+}
+
+func (v *Vocabulary) Decode(id int32) string {
+	return v.Values[id]
+}
+
+func (v *Vocabulary) SpecialVocabulary() []string {
+	v.specialOnce.Do(func() {
+		for i := range v.Values {
+			if v.Types[i] == TOKEN_TYPE_CONTROL {
+				v.special = append(v.special, v.Values[i])
+			}
+		}
+	})
+
+	return v.special
+}
+
+func (v *Vocabulary) Merge(left, right string) int {
+	v.mergeOnce.Do(func() {
+		v.merge = make(map[string]int32, len(v.Merges))
+		for i, merge := range v.Merges {
+			v.merge[merge] = int32(i)
+		}
+	})
+
+	if id, ok := v.merge[left+" "+right]; ok {
+		return int(id)
+	}
+
+	return -1
+}

sample/samplers.go

@@ -176,7 +176,7 @@ func NewGrammarSampler(model model.TextProcessor, grammarStr string) (*GrammarSa
 		vocabIds[i] = uint32(i)
 	}
 
-	grammar := llama.NewGrammar(grammarStr, vocabIds, pieces, []uint32{uint32(model.Vocabulary().EOS), uint32(model.Vocabulary().EOT)})
+	grammar := llama.NewGrammar(grammarStr, vocabIds, pieces, model.Vocabulary().EOS)
 	if grammar == nil {
 		return nil, errors.New("sample: failed to initialize grammar")
 	}