161 lines
4.5 KiB
C
161 lines
4.5 KiB
C
#ifndef TREE_SITTER_PARSER_H_
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#define TREE_SITTER_PARSER_H_
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#ifdef __cplusplus
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extern "C" {
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#endif
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#include <stdbool.h>
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#include <stdint.h>
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#include <stdlib.h>
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typedef unsigned short TSSymbol;
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typedef unsigned short TSStateId;
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#define ts_builtin_sym_error ((TSSymbol)-1)
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#define ts_builtin_sym_end 0
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#define ts_builtin_sym_start 1
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typedef struct {
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bool visible : 1;
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bool named : 1;
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bool extra : 1;
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bool structural : 1;
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} TSSymbolMetadata;
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typedef struct {
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void (*advance)(void *, TSStateId, bool);
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int32_t lookahead;
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TSSymbol result_symbol;
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} TSLexer;
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typedef enum {
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TSParseActionTypeShift,
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TSParseActionTypeReduce,
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TSParseActionTypeAccept,
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TSParseActionTypeRecover,
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} TSParseActionType;
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typedef struct {
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union {
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TSStateId to_state;
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struct {
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TSSymbol symbol;
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unsigned short child_count;
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};
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};
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TSParseActionType type : 4;
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bool extra : 1;
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bool fragile : 1;
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} TSParseAction;
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typedef union {
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TSParseAction action;
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struct {
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unsigned short count;
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bool reusable : 1;
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bool depends_on_lookahead : 1;
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};
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} TSParseActionEntry;
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typedef struct TSLanguage {
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size_t symbol_count;
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const char **symbol_names;
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const TSSymbolMetadata *symbol_metadata;
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const unsigned short *parse_table;
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const TSParseActionEntry *parse_actions;
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const TSStateId *lex_states;
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bool (*lex_fn)(TSLexer *, TSStateId);
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} TSLanguage;
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/*
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* Lexer Macros
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*/
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#define START_LEXER() \
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int32_t lookahead; \
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next_state: \
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lookahead = lexer->lookahead;
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#define ADVANCE(state_value) \
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{ \
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lexer->advance(lexer, state_value, false); \
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state = state_value; \
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goto next_state; \
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}
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#define SKIP(state_value) \
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{ \
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lexer->advance(lexer, state_value, true); \
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state = state_value; \
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goto next_state; \
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}
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#define ACCEPT_TOKEN(symbol_value) \
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{ \
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lexer->result_symbol = symbol_value; \
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return true; \
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}
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#define LEX_ERROR() return false
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/*
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* Parse Table Macros
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*/
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#define SHIFT(to_state_value) \
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{ \
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{ .type = TSParseActionTypeShift, .to_state = to_state_value } \
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}
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#define RECOVER(to_state_value) \
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{ \
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{ .type = TSParseActionTypeRecover, .to_state = to_state_value } \
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}
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#define SHIFT_EXTRA() \
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{ \
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{ .type = TSParseActionTypeShift, .extra = true } \
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}
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#define REDUCE(symbol_val, child_count_val) \
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{ \
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{ \
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.type = TSParseActionTypeReduce, .symbol = symbol_val, \
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.child_count = child_count_val, \
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} \
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}
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#define REDUCE_FRAGILE(symbol_val, child_count_val) \
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{ \
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{ \
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.type = TSParseActionTypeReduce, .symbol = symbol_val, \
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.child_count = child_count_val, .fragile = true, \
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} \
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}
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#define ACCEPT_INPUT() \
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{ \
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{ .type = TSParseActionTypeAccept } \
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}
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#define EXPORT_LANGUAGE(language_name) \
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static TSLanguage language = { \
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.symbol_count = SYMBOL_COUNT, \
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.symbol_metadata = ts_symbol_metadata, \
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.parse_table = (const unsigned short *)ts_parse_table, \
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.parse_actions = ts_parse_actions, \
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.lex_states = ts_lex_states, \
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.symbol_names = ts_symbol_names, \
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.lex_fn = ts_lex, \
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}; \
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\
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const TSLanguage *language_name() { \
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return &language; \
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}
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#ifdef __cplusplus
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}
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#endif
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#endif // TREE_SITTER_PARSER_H_
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