api.h

#ifndef TREE_SITTER_API_H_
#define TREE_SITTER_API_H_

#ifdef __cplusplus
extern "C" {
#endif

#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>
#include <stdbool.h>

/****************************/
/* Section - ABI Versioning */
/****************************/

/**
 * The latest ABI version that is supported by the current version of the
 * library. When Languages are generated by the Tree-sitter CLI, they are
 * assigned an ABI version number that corresponds to the current CLI version.
 * The Tree-sitter library is generally backwards-compatible with languages
 * generated using older CLI versions, but is not forwards-compatible.
 */
#define TREE_SITTER_LANGUAGE_VERSION 14

/**
 * The earliest ABI version that is supported by the current version of the
 * library.
 */
#define TREE_SITTER_MIN_COMPATIBLE_LANGUAGE_VERSION 13

/*******************/
/* Section - Types */
/*******************/

typedef uint16_t TSSymbol;
typedef uint16_t TSFieldId;
typedef struct TSLanguage TSLanguage;
typedef struct TSParser TSParser;
typedef struct TSTree TSTree;
typedef struct TSQuery TSQuery;
typedef struct TSQueryCursor TSQueryCursor;

typedef enum {
  TSInputEncodingUTF8,
  TSInputEncodingUTF16,
} TSInputEncoding;

typedef enum {
  TSSymbolTypeRegular,
  TSSymbolTypeAnonymous,
  TSSymbolTypeAuxiliary,
} TSSymbolType;

typedef struct {
  uint32_t row;
  uint32_t column;
} TSPoint;

typedef struct {
  TSPoint start_point;
  TSPoint end_point;
  uint32_t start_byte;
  uint32_t end_byte;
} TSRange;

typedef struct {
  void *payload;
  const char *(*read)(void *payload, uint32_t byte_index, TSPoint position, uint32_t *bytes_read);
  TSInputEncoding encoding;
} TSInput;

typedef enum {
  TSLogTypeParse,
  TSLogTypeLex,
} TSLogType;

typedef struct {
  void *payload;
  void (*log)(void *payload, TSLogType, const char *);
} TSLogger;

typedef struct {
  uint32_t start_byte;
  uint32_t old_end_byte;
  uint32_t new_end_byte;
  TSPoint start_point;
  TSPoint old_end_point;
  TSPoint new_end_point;
} TSInputEdit;

typedef struct {
  uint32_t context[4];
  const void *id;
  const TSTree *tree;
} TSNode;

typedef struct {
  const void *tree;
  const void *id;
  uint32_t context[2];
} TSTreeCursor;

typedef struct {
  TSNode node;
  uint32_t index;
} TSQueryCapture;

typedef enum {
  TSQuantifierZero = 0, // must match the array initialization value
  TSQuantifierZeroOrOne,
  TSQuantifierZeroOrMore,
  TSQuantifierOne,
  TSQuantifierOneOrMore,
} TSQuantifier;

typedef struct {
  uint32_t id;
  uint16_t pattern_index;
  uint16_t capture_count;
  const TSQueryCapture *captures;
} TSQueryMatch;

typedef enum {
  TSQueryPredicateStepTypeDone,
  TSQueryPredicateStepTypeCapture,
  TSQueryPredicateStepTypeString,
} TSQueryPredicateStepType;

typedef struct {
  TSQueryPredicateStepType type;
  uint32_t value_id;
} TSQueryPredicateStep;

typedef enum {
  TSQueryErrorNone = 0,
  TSQueryErrorSyntax,
  TSQueryErrorNodeType,
  TSQueryErrorField,
  TSQueryErrorCapture,
  TSQueryErrorStructure,
  TSQueryErrorLanguage,
} TSQueryError;

/********************/
/* Section - Parser */
/********************/

/**
 * Create a new parser.
 */
TSParser *ts_parser_new(void);

/**
 * Delete the parser, freeing all of the memory that it used.
 */
void ts_parser_delete(TSParser *parser);

/**
 * Set the language that the parser should use for parsing.
 *
 * Returns a boolean indicating whether or not the language was successfully
 * assigned. True means assignment succeeded. False means there was a version
 * mismatch: the language was generated with an incompatible version of the
 * Tree-sitter CLI. Check the language's version using `ts_language_version`
 * and compare it to this library's `TREE_SITTER_LANGUAGE_VERSION` and
 * `TREE_SITTER_MIN_COMPATIBLE_LANGUAGE_VERSION` constants.
 */
bool ts_parser_set_language(TSParser *self, const TSLanguage *language);

/**
 * Get the parser's current language.
 */
const TSLanguage *ts_parser_language(const TSParser *self);

/**
 * Set the ranges of text that the parser should include when parsing.
 *
 * By default, the parser will always include entire documents. This function
 * allows you to parse only a *portion* of a document but still return a syntax
 * tree whose ranges match up with the document as a whole. You can also pass
 * multiple disjoint ranges.
 *
 * The second and third parameters specify the location and length of an array
 * of ranges. The parser does *not* take ownership of these ranges; it copies
 * the data, so it doesn't matter how these ranges are allocated.
 *
 * If `length` is zero, then the entire document will be parsed. Otherwise,
 * the given ranges must be ordered from earliest to latest in the document,
 * and they must not overlap. That is, the following must hold for all
 * `i` < `length - 1`: ranges[i].end_byte <= ranges[i + 1].start_byte
 *
 * If this requirement is not satisfied, the operation will fail, the ranges
 * will not be assigned, and this function will return `false`. On success,
 * this function returns `true`
 */
bool ts_parser_set_included_ranges(
  TSParser *self,
  const TSRange *ranges,
  uint32_t length
);

/**
 * Get the ranges of text that the parser will include when parsing.
 *
 * The returned pointer is owned by the parser. The caller should not free it
 * or write to it. The length of the array will be written to the given
 * `length` pointer.
 */
const TSRange *ts_parser_included_ranges(
  const TSParser *self,
  uint32_t *length
);

/**
 * Use the parser to parse some source code and create a syntax tree.
 *
 * If you are parsing this document for the first time, pass `NULL` for the
 * `old_tree` parameter. Otherwise, if you have already parsed an earlier
 * version of this document and the document has since been edited, pass the
 * previous syntax tree so that the unchanged parts of it can be reused.
 * This will save time and memory. For this to work correctly, you must have
 * already edited the old syntax tree using the `ts_tree_edit` function in a
 * way that exactly matches the source code changes.
 *
 * The `TSInput` parameter lets you specify how to read the text. It has the
 * following three fields:
 * 1. `read`: A function to retrieve a chunk of text at a given byte offset
 *    and (row, column) position. The function should return a pointer to the
 *    text and write its length to the `bytes_read` pointer. The parser does
 *    not take ownership of this buffer; it just borrows it until it has
 *    finished reading it. The function should write a zero value to the
 *    `bytes_read` pointer to indicate the end of the document.
 * 2. `payload`: An arbitrary pointer that will be passed to each invocation
 *    of the `read` function.
 * 3. `encoding`: An indication of how the text is encoded. Either
 *    `TSInputEncodingUTF8` or `TSInputEncodingUTF16`.
 *
 * This function returns a syntax tree on success, and `NULL` on failure. There
 * are three possible reasons for failure:
 * 1. The parser does not have a language assigned. Check for this using the
      `ts_parser_language` function.
 * 2. Parsing was cancelled due to a timeout that was set by an earlier call to
 *    the `ts_parser_set_timeout_micros` function. You can resume parsing from
 *    where the parser left out by calling `ts_parser_parse` again with the
 *    same arguments. Or you can start parsing from scratch by first calling
 *    `ts_parser_reset`.
 * 3. Parsing was cancelled using a cancellation flag that was set by an
 *    earlier call to `ts_parser_set_cancellation_flag`. You can resume parsing
 *    from where the parser left out by calling `ts_parser_parse` again with
 *    the same arguments.
 */
TSTree *ts_parser_parse(
  TSParser *self,
  const TSTree *old_tree,
  TSInput input
);

/**
 * Use the parser to parse some source code stored in one contiguous buffer.
 * The first two parameters are the same as in the `ts_parser_parse` function
 * above. The second two parameters indicate the location of the buffer and its
 * length in bytes.
 */
TSTree *ts_parser_parse_string(
  TSParser *self,
  const TSTree *old_tree,
  const char *string,
  uint32_t length
);

/**
 * Use the parser to parse some source code stored in one contiguous buffer with
 * a given encoding. The first four parameters work the same as in the
 * `ts_parser_parse_string` method above. The final parameter indicates whether
 * the text is encoded as UTF8 or UTF16.
 */
TSTree *ts_parser_parse_string_encoding(
  TSParser *self,
  const TSTree *old_tree,
  const char *string,
  uint32_t length,
  TSInputEncoding encoding
);

/**
 * Instruct the parser to start the next parse from the beginning.
 *
 * If the parser previously failed because of a timeout or a cancellation, then
 * by default, it will resume where it left off on the next call to
 * `ts_parser_parse` or other parsing functions. If you don't want to resume,
 * and instead intend to use this parser to parse some other document, you must
 * call `ts_parser_reset` first.
 */
void ts_parser_reset(TSParser *self);

/**
 * Set the maximum duration in microseconds that parsing should be allowed to
 * take before halting.
 *
 * If parsing takes longer than this, it will halt early, returning NULL.
 * See `ts_parser_parse` for more information.
 */
void ts_parser_set_timeout_micros(TSParser *self, uint64_t timeout);

/**
 * Get the duration in microseconds that parsing is allowed to take.
 */
uint64_t ts_parser_timeout_micros(const TSParser *self);

/**
 * Set the parser's current cancellation flag pointer.
 *
 * If a non-null pointer is assigned, then the parser will periodically read
 * from this pointer during parsing. If it reads a non-zero value, it will
 * halt early, returning NULL. See `ts_parser_parse` for more information.
 */
void ts_parser_set_cancellation_flag(TSParser *self, const size_t *flag);

/**
 * Get the parser's current cancellation flag pointer.
 */
const size_t *ts_parser_cancellation_flag(const TSParser *self);

/**
 * Set the logger that a parser should use during parsing.
 *
 * The parser does not take ownership over the logger payload. If a logger was
 * previously assigned, the caller is responsible for releasing any memory
 * owned by the previous logger.
 */
void ts_parser_set_logger(TSParser *self, TSLogger logger);

/**
 * Get the parser's current logger.
 */
TSLogger ts_parser_logger(const TSParser *self);

/**
 * Set the file descriptor to which the parser should write debugging graphs
 * during parsing. The graphs are formatted in the DOT language. You may want
 * to pipe these graphs directly to a `dot(1)` process in order to generate
 * SVG output. You can turn off this logging by passing a negative number.
 */
void ts_parser_print_dot_graphs(TSParser *self, int file);

/******************/
/* Section - Tree */
/******************/

/**
 * Create a shallow copy of the syntax tree. This is very fast.
 *
 * You need to copy a syntax tree in order to use it on more than one thread at
 * a time, as syntax trees are not thread safe.
 */
TSTree *ts_tree_copy(const TSTree *self);

/**
 * Delete the syntax tree, freeing all of the memory that it used.
 */
void ts_tree_delete(TSTree *self);

/**
 * Get the root node of the syntax tree.
 */
TSNode ts_tree_root_node(const TSTree *self);

/**
 * Get the root node of the syntax tree, but with its position
 * shifted forward by the given offset.
 */
TSNode ts_tree_root_node_with_offset(
  const TSTree *self,
  uint32_t offset_bytes,
  TSPoint offset_point
);

/**
 * Get the language that was used to parse the syntax tree.
 */
const TSLanguage *ts_tree_language(const TSTree *);

/**
 * Edit the syntax tree to keep it in sync with source code that has been
 * edited.
 *
 * You must describe the edit both in terms of byte offsets and in terms of
 * (row, column) coordinates.
 */
void ts_tree_edit(TSTree *self, const TSInputEdit *edit);

/**
 * Compare an old edited syntax tree to a new syntax tree representing the same
 * document, returning an array of ranges whose syntactic structure has changed.
 *
 * For this to work correctly, the old syntax tree must have been edited such
 * that its ranges match up to the new tree. Generally, you'll want to call
 * this function right after calling one of the `ts_parser_parse` functions.
 * You need to pass the old tree that was passed to parse, as well as the new
 * tree that was returned from that function.
 *
 * The returned array is allocated using `malloc` and the caller is responsible
 * for freeing it using `free`. The length of the array will be written to the
 * given `length` pointer.
 */
TSRange *ts_tree_get_changed_ranges(
  const TSTree *old_tree,
  const TSTree *new_tree,
  uint32_t *length
);

/**
 * Write a DOT graph describing the syntax tree to the given file.
 */
void ts_tree_print_dot_graph(const TSTree *, FILE *);

/******************/
/* Section - Node */
/******************/

/**
 * Get the node's type as a null-terminated string.
 */
const char *ts_node_type(TSNode);

/**
 * Get the node's type as a numerical id.
 */
TSSymbol ts_node_symbol(TSNode);

/**
 * Get the node's start byte.
 */
uint32_t ts_node_start_byte(TSNode);

/**
 * Get the node's start position in terms of rows and columns.
 */
TSPoint ts_node_start_point(TSNode);

/**
 * Get the node's end byte.
 */
uint32_t ts_node_end_byte(TSNode);

/**
 * Get the node's end position in terms of rows and columns.
 */
TSPoint ts_node_end_point(TSNode);

/**
 * Get an S-expression representing the node as a string.
 *
 * This string is allocated with `malloc` and the caller is responsible for
 * freeing it using `free`.
 */
char *ts_node_string(TSNode);

/**
 * Check if the node is null. Functions like `ts_node_child` and
 * `ts_node_next_sibling` will return a null node to indicate that no such node
 * was found.
 */
bool ts_node_is_null(TSNode);

/**
 * Check if the node is *named*. Named nodes correspond to named rules in the
 * grammar, whereas *anonymous* nodes correspond to string literals in the
 * grammar.
 */
bool ts_node_is_named(TSNode);

/**
 * Check if the node is *missing*. Missing nodes are inserted by the parser in
 * order to recover from certain kinds of syntax errors.
 */
bool ts_node_is_missing(TSNode);

/**
 * Check if the node is *extra*. Extra nodes represent things like comments,
 * which are not required the grammar, but can appear anywhere.
 */
bool ts_node_is_extra(TSNode);

/**
 * Check if a syntax node has been edited.
 */
bool ts_node_has_changes(TSNode);

/**
 * Check if the node is a syntax error or contains any syntax errors.
 */
bool ts_node_has_error(TSNode);

/**
 * Get the node's immediate parent.
 */
TSNode ts_node_parent(TSNode);

/**
 * Get the node's child at the given index, where zero represents the first
 * child.
 */
TSNode ts_node_child(TSNode, uint32_t);

/**
 * Get the field name for node's child at the given index, where zero represents
 * the first child. Returns NULL, if no field is found.
 */
const char *ts_node_field_name_for_child(TSNode, uint32_t);

/**
 * Get the node's number of children.
 */
uint32_t ts_node_child_count(TSNode);

/**
 * Get the node's *named* child at the given index.
 *
 * See also `ts_node_is_named`.
 */
TSNode ts_node_named_child(TSNode, uint32_t);

/**
 * Get the node's number of *named* children.
 *
 * See also `ts_node_is_named`.
 */
uint32_t ts_node_named_child_count(TSNode);

/**
 * Get the node's child with the given field name.
 */
TSNode ts_node_child_by_field_name(
  TSNode self,
  const char *field_name,
  uint32_t field_name_length
);

/**
 * Get the node's child with the given numerical field id.
 *
 * You can convert a field name to an id using the
 * `ts_language_field_id_for_name` function.
 */
TSNode ts_node_child_by_field_id(TSNode, TSFieldId);

/**
 * Get the node's next / previous sibling.
 */
TSNode ts_node_next_sibling(TSNode);
TSNode ts_node_prev_sibling(TSNode);

/**
 * Get the node's next / previous *named* sibling.
 */
TSNode ts_node_next_named_sibling(TSNode);
TSNode ts_node_prev_named_sibling(TSNode);

/**
 * Get the node's first child that extends beyond the given byte offset.
 */
TSNode ts_node_first_child_for_byte(TSNode, uint32_t);

/**
 * Get the node's first named child that extends beyond the given byte offset.
 */
TSNode ts_node_first_named_child_for_byte(TSNode, uint32_t);

/**
 * Get the smallest node within this node that spans the given range of bytes
 * or (row, column) positions.
 */
TSNode ts_node_descendant_for_byte_range(TSNode, uint32_t, uint32_t);
TSNode ts_node_descendant_for_point_range(TSNode, TSPoint, TSPoint);

/**
 * Get the smallest named node within this node that spans the given range of
 * bytes or (row, column) positions.
 */
TSNode ts_node_named_descendant_for_byte_range(TSNode, uint32_t, uint32_t);
TSNode ts_node_named_descendant_for_point_range(TSNode, TSPoint, TSPoint);

/**
 * Edit the node to keep it in-sync with source code that has been edited.
 *
 * This function is only rarely needed. When you edit a syntax tree with the
 * `ts_tree_edit` function, all of the nodes that you retrieve from the tree
 * afterward will already reflect the edit. You only need to use `ts_node_edit`
 * when you have a `TSNode` instance that you want to keep and continue to use
 * after an edit.
 */
void ts_node_edit(TSNode *, const TSInputEdit *);

/**
 * Check if two nodes are identical.
 */
bool ts_node_eq(TSNode, TSNode);

/************************/
/* Section - TreeCursor */
/************************/

/**
 * Create a new tree cursor starting from the given node.
 *
 * A tree cursor allows you to walk a syntax tree more efficiently than is
 * possible using the `TSNode` functions. It is a mutable object that is always
 * on a certain syntax node, and can be moved imperatively to different nodes.
 */
TSTreeCursor ts_tree_cursor_new(TSNode);

/**
 * Delete a tree cursor, freeing all of the memory that it used.
 */
void ts_tree_cursor_delete(TSTreeCursor *);

/**
 * Re-initialize a tree cursor to start at a different node.
 */
void ts_tree_cursor_reset(TSTreeCursor *, TSNode);

/**
 * Get the tree cursor's current node.
 */
TSNode ts_tree_cursor_current_node(const TSTreeCursor *);

/**
 * Get the field name of the tree cursor's current node.
 *
 * This returns `NULL` if the current node doesn't have a field.
 * See also `ts_node_child_by_field_name`.
 */
const char *ts_tree_cursor_current_field_name(const TSTreeCursor *);

/**
 * Get the field id of the tree cursor's current node.
 *
 * This returns zero if the current node doesn't have a field.
 * See also `ts_node_child_by_field_id`, `ts_language_field_id_for_name`.
 */
TSFieldId ts_tree_cursor_current_field_id(const TSTreeCursor *);

/**
 * Move the cursor to the parent of its current node.
 *
 * This returns `true` if the cursor successfully moved, and returns `false`
 * if there was no parent node (the cursor was already on the root node).
 */
bool ts_tree_cursor_goto_parent(TSTreeCursor *);

/**
 * Move the cursor to the next sibling of its current node.
 *
 * This returns `true` if the cursor successfully moved, and returns `false`
 * if there was no next sibling node.
 */
bool ts_tree_cursor_goto_next_sibling(TSTreeCursor *);

/**
 * Move the cursor to the first child of its current node.
 *
 * This returns `true` if the cursor successfully moved, and returns `false`
 * if there were no children.
 */
bool ts_tree_cursor_goto_first_child(TSTreeCursor *);

/**
 * Move the cursor to the first child of its current node that extends beyond
 * the given byte offset or point.
 *
 * This returns the index of the child node if one was found, and returns -1
 * if no such child was found.
 */
int64_t ts_tree_cursor_goto_first_child_for_byte(TSTreeCursor *, uint32_t);
int64_t ts_tree_cursor_goto_first_child_for_point(TSTreeCursor *, TSPoint);

TSTreeCursor ts_tree_cursor_copy(const TSTreeCursor *);

/*******************/
/* Section - Query */
/*******************/

/**
 * Create a new query from a string containing one or more S-expression
 * patterns. The query is associated with a particular language, and can
 * only be run on syntax nodes parsed with that language.
 *
 * If all of the given patterns are valid, this returns a `TSQuery`.
 * If a pattern is invalid, this returns `NULL`, and provides two pieces
 * of information about the problem:
 * 1. The byte offset of the error is written to the `error_offset` parameter.
 * 2. The type of error is written to the `error_type` parameter.
 */
TSQuery *ts_query_new(
  const TSLanguage *language,
  const char *source,
  uint32_t source_len,
  uint32_t *error_offset,
  TSQueryError *error_type
);

/**
 * Delete a query, freeing all of the memory that it used.
 */
void ts_query_delete(TSQuery *);

/**
 * Get the number of patterns, captures, or string literals in the query.
 */
uint32_t ts_query_pattern_count(const TSQuery *);
uint32_t ts_query_capture_count(const TSQuery *);
uint32_t ts_query_string_count(const TSQuery *);

/**
 * Get the byte offset where the given pattern starts in the query's source.
 *
 * This can be useful when combining queries by concatenating their source
 * code strings.
 */
uint32_t ts_query_start_byte_for_pattern(const TSQuery *, uint32_t);

/**
 * Get all of the predicates for the given pattern in the query.
 *
 * The predicates are represented as a single array of steps. There are three
 * types of steps in this array, which correspond to the three legal values for
 * the `type` field:
 * - `TSQueryPredicateStepTypeCapture` - Steps with this type represent names
 *    of captures. Their `value_id` can be used with the
 *   `ts_query_capture_name_for_id` function to obtain the name of the capture.
 * - `TSQueryPredicateStepTypeString` - Steps with this type represent literal
 *    strings. Their `value_id` can be used with the
 *    `ts_query_string_value_for_id` function to obtain their string value.
 * - `TSQueryPredicateStepTypeDone` - Steps with this type are *sentinels*
 *    that represent the end of an individual predicate. If a pattern has two
 *    predicates, then there will be two steps with this `type` in the array.
 */
const TSQueryPredicateStep *ts_query_predicates_for_pattern(
  const TSQuery *self,
  uint32_t pattern_index,
  uint32_t *length
);

bool ts_query_is_pattern_rooted(
  const TSQuery *self,
  uint32_t pattern_index
);

bool ts_query_is_pattern_guaranteed_at_step(
  const TSQuery *self,
  uint32_t byte_offset
);

/**
 * Get the name and length of one of the query's captures, or one of the
 * query's string literals. Each capture and string is associated with a
 * numeric id based on the order that it appeared in the query's source.
 */
const char *ts_query_capture_name_for_id(
  const TSQuery *,
  uint32_t id,
  uint32_t *length
);

/**
 * Get the quantifier of the query's captures. Each capture is * associated
 * with a numeric id based on the order that it appeared in the query's source.
 */
TSQuantifier ts_query_capture_quantifier_for_id(
  const TSQuery *,
  uint32_t pattern_id,
  uint32_t capture_id
);

const char *ts_query_string_value_for_id(
  const TSQuery *,
  uint32_t id,
  uint32_t *length
);

/**
 * Disable a certain capture within a query.
 *
 * This prevents the capture from being returned in matches, and also avoids
 * any resource usage associated with recording the capture. Currently, there
 * is no way to undo this.
 */
void ts_query_disable_capture(TSQuery *, const char *, uint32_t);

/**
 * Disable a certain pattern within a query.
 *
 * This prevents the pattern from matching and removes most of the overhead
 * associated with the pattern. Currently, there is no way to undo this.
 */
void ts_query_disable_pattern(TSQuery *, uint32_t);

/**
 * Create a new cursor for executing a given query.
 *
 * The cursor stores the state that is needed to iteratively search
 * for matches. To use the query cursor, first call `ts_query_cursor_exec`
 * to start running a given query on a given syntax node. Then, there are
 * two options for consuming the results of the query:
 * 1. Repeatedly call `ts_query_cursor_next_match` to iterate over all of the
 *    *matches* in the order that they were found. Each match contains the
 *    index of the pattern that matched, and an array of captures. Because
 *    multiple patterns can match the same set of nodes, one match may contain
 *    captures that appear *before* some of the captures from a previous match.
 * 2. Repeatedly call `ts_query_cursor_next_capture` to iterate over all of the
 *    individual *captures* in the order that they appear. This is useful if
 *    don't care about which pattern matched, and just want a single ordered
 *    sequence of captures.
 *
 * If you don't care about consuming all of the results, you can stop calling
 * `ts_query_cursor_next_match` or `ts_query_cursor_next_capture` at any point.
 *  You can then start executing another query on another node by calling
 *  `ts_query_cursor_exec` again.
 */
TSQueryCursor *ts_query_cursor_new(void);

/**
 * Delete a query cursor, freeing all of the memory that it used.
 */
void ts_query_cursor_delete(TSQueryCursor *);

/**
 * Start running a given query on a given node.
 */
void ts_query_cursor_exec(TSQueryCursor *, const TSQuery *, TSNode);

/**
 * Manage the maximum number of in-progress matches allowed by this query
 * cursor.
 *
 * Query cursors have an optional maximum capacity for storing lists of
 * in-progress captures. If this capacity is exceeded, then the
 * earliest-starting match will silently be dropped to make room for further
 * matches. This maximum capacity is optional — by default, query cursors allow
 * any number of pending matches, dynamically allocating new space for them as
 * needed as the query is executed.
 */
bool ts_query_cursor_did_exceed_match_limit(const TSQueryCursor *);
uint32_t ts_query_cursor_match_limit(const TSQueryCursor *);
void ts_query_cursor_set_match_limit(TSQueryCursor *, uint32_t);

/**
 * Set the range of bytes or (row, column) positions in which the query
 * will be executed.
 */
void ts_query_cursor_set_byte_range(TSQueryCursor *, uint32_t, uint32_t);
void ts_query_cursor_set_point_range(TSQueryCursor *, TSPoint, TSPoint);

/**
 * Advance to the next match of the currently running query.
 *
 * If there is a match, write it to `*match` and return `true`.
 * Otherwise, return `false`.
 */
bool ts_query_cursor_next_match(TSQueryCursor *, TSQueryMatch *match);
void ts_query_cursor_remove_match(TSQueryCursor *, uint32_t id);

/**
 * Advance to the next capture of the currently running query.
 *
 * If there is a capture, write its match to `*match` and its index within
 * the matche's capture list to `*capture_index`. Otherwise, return `false`.
 */
bool ts_query_cursor_next_capture(
  TSQueryCursor *,
  TSQueryMatch *match,
  uint32_t *capture_index
);

/**********************/
/* Section - Language */
/**********************/

/**
 * Get the number of distinct node types in the language.
 */
uint32_t ts_language_symbol_count(const TSLanguage *);

/**
 * Get a node type string for the given numerical id.
 */
const char *ts_language_symbol_name(const TSLanguage *, TSSymbol);

/**
 * Get the numerical id for the given node type string.
 */
TSSymbol ts_language_symbol_for_name(
  const TSLanguage *self,
  const char *string,
  uint32_t length,
  bool is_named
);

/**
 * Get the number of distinct field names in the language.
 */
uint32_t ts_language_field_count(const TSLanguage *);

/**
 * Get the field name string for the given numerical id.
 */
const char *ts_language_field_name_for_id(const TSLanguage *, TSFieldId);

/**
 * Get the numerical id for the given field name string.
 */
TSFieldId ts_language_field_id_for_name(const TSLanguage *, const char *, uint32_t);

/**
 * Check whether the given node type id belongs to named nodes, anonymous nodes,
 * or a hidden nodes.
 *
 * See also `ts_node_is_named`. Hidden nodes are never returned from the API.
 */
TSSymbolType ts_language_symbol_type(const TSLanguage *, TSSymbol);

/**
 * Get the ABI version number for this language. This version number is used
 * to ensure that languages were generated by a compatible version of
 * Tree-sitter.
 *
 * See also `ts_parser_set_language`.
 */
uint32_t ts_language_version(const TSLanguage *);

/**********************************/
/* Section - Global Configuration */
/**********************************/

/**
 * Set the allocation functions used by the library.
 *
 * By default, Tree-sitter uses the standard libc allocation functions,
 * but aborts the process when an allocation fails. This function lets
 * you supply alternative allocation functions at runtime.
 * 
 * If you pass `NULL` for any parameter, Tree-sitter will switch back to
 * its default implementation of that function.
 * 
 * If you call this function after the library has already been used, then
 * you must ensure that either:
 *  1. All the existing objects have been freed.
 *  2. The new allocator shares its state with the old one, so it is capable
 *     of freeing memory that was allocated by the old allocator.
 */
void ts_set_allocator(
  void *(*new_malloc)(size_t),
	void *(*new_calloc)(size_t, size_t),
	void *(*new_realloc)(void *, size_t),
	void (*new_free)(void *)
);

#ifdef __cplusplus
}
#endif

#endif  // TREE_SITTER_API_H_