sleepy/llama.cpp
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common/parser: add proper reasoning tag prefill reading (#20424)

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* Implement proper prefill extraction

* Refactor cli parameters, update docs, move reasoning budget sampler part to common/reasoning-budget.cpp

* Update tools/server/server-task.cpp

* refactor: move grammars to variant, remove grammar_external, handle exception internally

* Make code less C++y

Co-authored-by: Georgi Gerganov <ggerganov@gmail.com>
This commit is contained in:
Piotr Wilkin (ilintar)
2026-03-19 16:58:21 +01:00
committed by GitHub
parent c1258830b2
commit 5e54d51b19
33 changed files with 651 additions and 454 deletions
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common/chat-auto-parser.h
+9 -18
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@@ -50,7 +50,7 @@ namespace autoparser {
// High-level params for parser generation
// ============================================================================
struct templates_params {
struct generation_params {
json messages;
json tools;
common_chat_tool_choice tool_choice = COMMON_CHAT_TOOL_CHOICE_AUTO;
@@ -62,6 +62,7 @@ struct templates_params {
bool add_generation_prompt = false;
bool enable_thinking = true;
std::chrono::system_clock::time_point now = std::chrono::system_clock::now();
std::string generation_prompt;
json extra_context;
bool add_bos = false;
bool add_eos = false;
@@ -77,11 +78,7 @@ struct templates_params {
// Reasoning handling mode (derived from R1-R3 comparisons)
enum class reasoning_mode {
NONE, // No reasoning markers detected
TAG_BASED, // Standard tag-based: <think>...</think>
DELIMITER, // Delimiter-based: [BEGIN FINAL RESPONSE] (reasoning ends at delimiter)
FORCED_OPEN, // Template ends with open reasoning tag (empty start, non-empty end)
FORCED_CLOSED, // Template ends with open reasoning tag on enabled thinking but
// with both opened and closed tag for disabled thinking
TAG_BASED, // Tag-based: <think>...</think> (start can be empty for delimiter-style)
TOOLS_ONLY // Only reason on tool calls, not on normal content
};
@@ -91,12 +88,6 @@ inline std::ostream & operator<<(std::ostream & os, const reasoning_mode & mode)
return os << "NONE";
case reasoning_mode::TAG_BASED:
return os << "TAG_BASED";
case reasoning_mode::DELIMITER:
return os << "DELIMITER";
case reasoning_mode::FORCED_OPEN:
return os << "FORCED_OPEN";
case reasoning_mode::FORCED_CLOSED:
return os << "FORCED_CLOSED";
case reasoning_mode::TOOLS_ONLY:
return os << "TOOLS_ONLY";
default:
@@ -184,7 +175,6 @@ struct tool_format_analysis {
bool fun_name_is_key = false; // In JSON format function name is JSON key, i.e. { "<funname>": { ... arguments ... } }
bool tools_array_wrapped = false; // Tool calls wrapped in JSON array [...]
bool uses_python_dicts = false; // Tool call args use Python dict format (single-quoted strings)
std::string function_field = "function";
std::string name_field = "name";
@@ -225,12 +215,12 @@ struct analyze_content;
struct parser_build_context {
common_chat_peg_builder & p;
const templates_params & inputs;
const generation_params & inputs;
common_peg_parser reasoning_parser;
bool extracting_reasoning = false;
const analyze_content * content = nullptr;
parser_build_context(common_chat_peg_builder & p, const templates_params & inputs);
parser_build_context(common_chat_peg_builder & p, const generation_params & inputs);
};
// ============================================================================
@@ -260,6 +250,7 @@ struct analyze_reasoning : analyze_base {
analyze_reasoning() = default;
analyze_reasoning(const common_chat_template & tmpl, bool supports_tools);
analyze_reasoning(std::string start_, std::string end_) : start(std::move(start_)), end(std::move(end_)) {}
common_peg_parser build_parser(parser_build_context & ctx) const override;
@@ -381,7 +372,7 @@ struct autoparser {
void analyze_template(const common_chat_template & tmpl);
// Build the PEG parser for this template
common_peg_arena build_parser(const templates_params & inputs) const;
common_peg_arena build_parser(const generation_params & inputs) const;
private:
// Collect tokens from entire analysis to preserve
@@ -395,10 +386,10 @@ struct autoparser {
class peg_generator {
public:
static common_chat_params generate_parser(const common_chat_template & tmpl,
const struct templates_params & inputs);
const struct generation_params & inputs);
static common_chat_params generate_parser(const common_chat_template & tmpl,
const struct templates_params & inputs,
const struct generation_params & inputs,
const autoparser & autoparser);
};