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Add snippet crate

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Co-Authored-By: Nathan Sobo <nathan@zed.dev>
Co-Authored-By: Antonio Scandurra <me@as-cii.com>
This commit is contained in:
Max Brunsfeld 2022-02-01 10:42:14 -08:00
parent d873786710
commit 956748e10c
15 changed files with 1385 additions and 0 deletions
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18
Cargo.lock generated
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@ -4418,6 +4418,16 @@ dependencies = [
"pin-project-lite 0.1.12", "pin-project-lite 0.1.12",
] ]
[[package]]
name = "snippet"
version = "0.1.0"
dependencies = [
"anyhow",
"smallvec",
"tree-sitter",
"tree-sitter-snippet",
]
[[package]] [[package]]
name = "socket2" name = "socket2"
version = "0.3.19" version = "0.3.19"
@ -5203,6 +5213,14 @@ dependencies = [
"tree-sitter", "tree-sitter",
] ]
[[package]]
name = "tree-sitter-snippet"
version = "0.0.1"
dependencies = [
"cc",
"tree-sitter",
]
[[package]] [[package]]
name = "ttf-parser" name = "ttf-parser"
version = "0.9.0" version = "0.9.0"

13
crates/snippet/Cargo.toml Normal file
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@ -0,0 +1,13 @@
[package]
name = "snippet"
version = "0.1.0"
edition = "2021"
[lib]
path = "src/snippet.rs"
[dependencies]
anyhow = "1.0"
smallvec = { version = "1.6", features = ["union"] }
tree-sitter = "0.20"
tree-sitter-snippet = { path = "./grammar" }

26
crates/snippet/grammar/Cargo.toml Normal file
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@ -0,0 +1,26 @@
[package]
name = "tree-sitter-snippet"
description = "snippet grammar for the tree-sitter parsing library"
version = "0.0.1"
keywords = ["incremental", "parsing", "snippet"]
categories = ["parsing", "text-editors"]
repository = "https://github.com/tree-sitter/tree-sitter-snippet"
edition = "2018"
license = "MIT"
build = "bindings/rust/build.rs"
include = [
"bindings/rust/*",
"grammar.js",
"queries/*",
"src/*",
]
[lib]
path = "bindings/rust/lib.rs"
[dependencies]
tree-sitter = "~0.20"
[build-dependencies]
cc = "1.0"

19
crates/snippet/grammar/binding.gyp Normal file
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@ -0,0 +1,19 @@
{
"targets": [
{
"target_name": "tree_sitter_snippet_binding",
"include_dirs": [
"<!(node -e \"require('nan')\")",
"src"
],
"sources": [
"bindings/node/binding.cc",
"src/parser.c",
# If your language uses an external scanner, add it here.
],
"cflags_c": [
"-std=c99",
]
}
]
}

28
crates/snippet/grammar/bindings/node/binding.cc Normal file
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@ -0,0 +1,28 @@
#include "tree_sitter/parser.h"
#include <node.h>
#include "nan.h"
using namespace v8;
extern "C" TSLanguage * tree_sitter_snippet();
namespace {
NAN_METHOD(New) {}
void Init(Local<Object> exports, Local<Object> module) {
Local<FunctionTemplate> tpl = Nan::New<FunctionTemplate>(New);
tpl->SetClassName(Nan::New("Language").ToLocalChecked());
tpl->InstanceTemplate()->SetInternalFieldCount(1);
Local<Function> constructor = Nan::GetFunction(tpl).ToLocalChecked();
Local<Object> instance = constructor->NewInstance(Nan::GetCurrentContext()).ToLocalChecked();
Nan::SetInternalFieldPointer(instance, 0, tree_sitter_snippet());
Nan::Set(instance, Nan::New("name").ToLocalChecked(), Nan::New("snippet").ToLocalChecked());
Nan::Set(module, Nan::New("exports").ToLocalChecked(), instance);
}
NODE_MODULE(tree_sitter_snippet_binding, Init)
} // namespace

19
crates/snippet/grammar/bindings/node/index.js Normal file
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@ -0,0 +1,19 @@
try {
module.exports = require("../../build/Release/tree_sitter_snippet_binding");
} catch (error1) {
if (error1.code !== 'MODULE_NOT_FOUND') {
throw error1;
}
try {
module.exports = require("../../build/Debug/tree_sitter_snippet_binding");
} catch (error2) {
if (error2.code !== 'MODULE_NOT_FOUND') {
throw error2;
}
throw error1
}
}
try {
module.exports.nodeTypeInfo = require("../../src/node-types.json");
} catch (_) {}

40
crates/snippet/grammar/bindings/rust/build.rs Normal file
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@ -0,0 +1,40 @@
fn main() {
let src_dir = std::path::Path::new("src");
let mut c_config = cc::Build::new();
c_config.include(&src_dir);
c_config
.flag_if_supported("-Wno-unused-parameter")
.flag_if_supported("-Wno-unused-but-set-variable")
.flag_if_supported("-Wno-trigraphs");
let parser_path = src_dir.join("parser.c");
c_config.file(&parser_path);
// If your language uses an external scanner written in C,
// then include this block of code:
/*
let scanner_path = src_dir.join("scanner.c");
c_config.file(&scanner_path);
println!("cargo:rerun-if-changed={}", scanner_path.to_str().unwrap());
*/
c_config.compile("parser");
println!("cargo:rerun-if-changed={}", parser_path.to_str().unwrap());
// If your language uses an external scanner written in C++,
// then include this block of code:
/*
let mut cpp_config = cc::Build::new();
cpp_config.cpp(true);
cpp_config.include(&src_dir);
cpp_config
.flag_if_supported("-Wno-unused-parameter")
.flag_if_supported("-Wno-unused-but-set-variable");
let scanner_path = src_dir.join("scanner.cc");
cpp_config.file(&scanner_path);
cpp_config.compile("scanner");
println!("cargo:rerun-if-changed={}", scanner_path.to_str().unwrap());
*/
}

52
crates/snippet/grammar/bindings/rust/lib.rs Normal file
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@ -0,0 +1,52 @@
//! This crate provides snippet language support for the [tree-sitter][] parsing library.
//!
//! Typically, you will use the [language][language func] function to add this language to a
//! tree-sitter [Parser][], and then use the parser to parse some code:
//!
//! ```
//! let code = "";
//! let mut parser = tree_sitter::Parser::new();
//! parser.set_language(tree_sitter_snippet::language()).expect("Error loading snippet grammar");
//! let tree = parser.parse(code, None).unwrap();
//! ```
//!
//! [Language]: https://docs.rs/tree-sitter/*/tree_sitter/struct.Language.html
//! [language func]: fn.language.html
//! [Parser]: https://docs.rs/tree-sitter/*/tree_sitter/struct.Parser.html
//! [tree-sitter]: https://tree-sitter.github.io/
use tree_sitter::Language;
extern "C" {
fn tree_sitter_snippet() -> Language;
}
/// Get the tree-sitter [Language][] for this grammar.
///
/// [Language]: https://docs.rs/tree-sitter/*/tree_sitter/struct.Language.html
pub fn language() -> Language {
unsafe { tree_sitter_snippet() }
}
/// The content of the [`node-types.json`][] file for this grammar.
///
/// [`node-types.json`]: https://tree-sitter.github.io/tree-sitter/using-parsers#static-node-types
pub const NODE_TYPES: &'static str = include_str!("../../src/node-types.json");
// Uncomment these to include any queries that this grammar contains
// pub const HIGHLIGHTS_QUERY: &'static str = include_str!("../../queries/highlights.scm");
// pub const INJECTIONS_QUERY: &'static str = include_str!("../../queries/injections.scm");
// pub const LOCALS_QUERY: &'static str = include_str!("../../queries/locals.scm");
// pub const TAGS_QUERY: &'static str = include_str!("../../queries/tags.scm");
#[cfg(test)]
mod tests {
#[test]
fn test_can_load_grammar() {
let mut parser = tree_sitter::Parser::new();
parser
.set_language(super::language())
.expect("Error loading snippet language");
}
}

26
crates/snippet/grammar/grammar.js Normal file
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@ -0,0 +1,26 @@
module.exports = grammar({
name: 'snippet',
rules: {
snippet: $ => repeat1($._any),
_any: $ => choice(
$.tabstop,
$.placeholder,
$.text
),
tabstop: $ => choice(
seq('$', $.int),
seq('${', $.int, '}'),
),
placeholder: $ => seq('${', $.int, ':', $.snippet, '}'),
int: $ => /[0-9]+/,
text: $ => choice($._raw_curly, $._plain_text),
_raw_curly: $ => token(prec(-1, /}+/)),
_plain_text: $ => /([^$}]|\\[$\\}])+/,
}
})

19
crates/snippet/grammar/package.json Normal file
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@ -0,0 +1,19 @@
{
"name": "tree-sitter-snippet",
"version": "0.0.1",
"description": "snippet grammar for tree-sitter",
"main": "bindings/node",
"keywords": [
"parsing",
"incremental"
],
"dependencies": {
"nan": "^2.12.1"
},
"devDependencies": {
"tree-sitter-cli": "^0.20.4"
},
"scripts": {
"test": "tree-sitter test"
}
}

133
crates/snippet/grammar/src/grammar.json Normal file
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@ -0,0 +1,133 @@
{
"name": "snippet",
"rules": {
"snippet": {
"type": "REPEAT1",
"content": {
"type": "SYMBOL",
"name": "_any"
}
},
"_any": {
"type": "CHOICE",
"members": [
{
"type": "SYMBOL",
"name": "tabstop"
},
{
"type": "SYMBOL",
"name": "placeholder"
},
{
"type": "SYMBOL",
"name": "text"
}
]
},
"tabstop": {
"type": "CHOICE",
"members": [
{
"type": "SEQ",
"members": [
{
"type": "STRING",
"value": "$"
},
{
"type": "SYMBOL",
"name": "int"
}
]
},
{
"type": "SEQ",
"members": [
{
"type": "STRING",
"value": "${"
},
{
"type": "SYMBOL",
"name": "int"
},
{
"type": "STRING",
"value": "}"
}
]
}
]
},
"placeholder": {
"type": "SEQ",
"members": [
{
"type": "STRING",
"value": "${"
},
{
"type": "SYMBOL",
"name": "int"
},
{
"type": "STRING",
"value": ":"
},
{
"type": "SYMBOL",
"name": "snippet"
},
{
"type": "STRING",
"value": "}"
}
]
},
"int": {
"type": "PATTERN",
"value": "[0-9]+"
},
"text": {
"type": "CHOICE",
"members": [
{
"type": "SYMBOL",
"name": "_raw_curly"
},
{
"type": "SYMBOL",
"name": "_plain_text"
}
]
},
"_raw_curly": {
"type": "TOKEN",
"content": {
"type": "PREC",
"value": -1,
"content": {
"type": "PATTERN",
"value": "}+"
}
}
},
"_plain_text": {
"type": "PATTERN",
"value": "([^$}]|\\\\[$\\\\}])+"
}
},
"extras": [
{
"type": "PATTERN",
"value": "\\s"
}
],
"conflicts": [],
"precedences": [],
"externals": [],
"inline": [],
"supertypes": []
}

84
crates/snippet/grammar/src/node-types.json Normal file
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@ -0,0 +1,84 @@
[
{
"type": "placeholder",
"named": true,
"fields": {},
"children": {
"multiple": true,
"required": true,
"types": [
{
"type": "int",
"named": true
},
{
"type": "snippet",
"named": true
}
]
}
},
{
"type": "snippet",
"named": true,
"fields": {},
"children": {
"multiple": true,
"required": true,
"types": [
{
"type": "placeholder",
"named": true
},
{
"type": "tabstop",
"named": true
},
{
"type": "text",
"named": true
}
]
}
},
{
"type": "tabstop",
"named": true,
"fields": {},
"children": {
"multiple": false,
"required": true,
"types": [
{
"type": "int",
"named": true
}
]
}
},
{
"type": "text",
"named": true,
"fields": {}
},
{
"type": "$",
"named": false
},
{
"type": "${",
"named": false
},
{
"type": ":",
"named": false
},
{
"type": "int",
"named": true
},
{
"type": "}",
"named": false
}
]

545
crates/snippet/grammar/src/parser.c Normal file
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@ -0,0 +1,545 @@
#include <tree_sitter/parser.h>
#if defined(__GNUC__) || defined(__clang__)
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wmissing-field-initializers"
#endif
#define LANGUAGE_VERSION 13
#define STATE_COUNT 25
#define LARGE_STATE_COUNT 8
#define SYMBOL_COUNT 14
#define ALIAS_COUNT 0
#define TOKEN_COUNT 8
#define EXTERNAL_TOKEN_COUNT 0
#define FIELD_COUNT 0
#define MAX_ALIAS_SEQUENCE_LENGTH 5
#define PRODUCTION_ID_COUNT 1
enum {
anon_sym_DOLLAR = 1,
anon_sym_DOLLAR_LBRACE = 2,
anon_sym_RBRACE = 3,
anon_sym_COLON = 4,
sym_int = 5,
sym__raw_curly = 6,
sym__plain_text = 7,
sym_snippet = 8,
sym__any = 9,
sym_tabstop = 10,
sym_placeholder = 11,
sym_text = 12,
aux_sym_snippet_repeat1 = 13,
};
static const char * const ts_symbol_names[] = {
[ts_builtin_sym_end] = "end",
[anon_sym_DOLLAR] = "$",
[anon_sym_DOLLAR_LBRACE] = "${",
[anon_sym_RBRACE] = "}",
[anon_sym_COLON] = ":",
[sym_int] = "int",
[sym__raw_curly] = "_raw_curly",
[sym__plain_text] = "_plain_text",
[sym_snippet] = "snippet",
[sym__any] = "_any",
[sym_tabstop] = "tabstop",
[sym_placeholder] = "placeholder",
[sym_text] = "text",
[aux_sym_snippet_repeat1] = "snippet_repeat1",
};
static const TSSymbol ts_symbol_map[] = {
[ts_builtin_sym_end] = ts_builtin_sym_end,
[anon_sym_DOLLAR] = anon_sym_DOLLAR,
[anon_sym_DOLLAR_LBRACE] = anon_sym_DOLLAR_LBRACE,
[anon_sym_RBRACE] = anon_sym_RBRACE,
[anon_sym_COLON] = anon_sym_COLON,
[sym_int] = sym_int,
[sym__raw_curly] = sym__raw_curly,
[sym__plain_text] = sym__plain_text,
[sym_snippet] = sym_snippet,
[sym__any] = sym__any,
[sym_tabstop] = sym_tabstop,
[sym_placeholder] = sym_placeholder,
[sym_text] = sym_text,
[aux_sym_snippet_repeat1] = aux_sym_snippet_repeat1,
};
static const TSSymbolMetadata ts_symbol_metadata[] = {
[ts_builtin_sym_end] = {
.visible = false,
.named = true,
},
[anon_sym_DOLLAR] = {
.visible = true,
.named = false,
},
[anon_sym_DOLLAR_LBRACE] = {
.visible = true,
.named = false,
},
[anon_sym_RBRACE] = {
.visible = true,
.named = false,
},
[anon_sym_COLON] = {
.visible = true,
.named = false,
},
[sym_int] = {
.visible = true,
.named = true,
},
[sym__raw_curly] = {
.visible = false,
.named = true,
},
[sym__plain_text] = {
.visible = false,
.named = true,
},
[sym_snippet] = {
.visible = true,
.named = true,
},
[sym__any] = {
.visible = false,
.named = true,
},
[sym_tabstop] = {
.visible = true,
.named = true,
},
[sym_placeholder] = {
.visible = true,
.named = true,
},
[sym_text] = {
.visible = true,
.named = true,
},
[aux_sym_snippet_repeat1] = {
.visible = false,
.named = false,
},
};
static const TSSymbol ts_alias_sequences[PRODUCTION_ID_COUNT][MAX_ALIAS_SEQUENCE_LENGTH] = {
[0] = {0},
};
static const uint16_t ts_non_terminal_alias_map[] = {
0,
};
static bool ts_lex(TSLexer *lexer, TSStateId state) {
START_LEXER();
eof = lexer->eof(lexer);
switch (state) {
case 0:
if (eof) ADVANCE(3);
if (lookahead == '$') ADVANCE(4);
if (lookahead == ':') ADVANCE(7);
if (lookahead == '}') ADVANCE(6);
if (lookahead == '\t' ||
lookahead == '\n' ||
lookahead == '\r' ||
lookahead == ' ') SKIP(0)
if (('0' <= lookahead && lookahead <= '9')) ADVANCE(8);
END_STATE();
case 1:
if (lookahead == '$') ADVANCE(4);
if (lookahead == '\\') ADVANCE(12);
if (lookahead == '}') ADVANCE(6);
if (lookahead == '\t' ||
lookahead == '\n' ||
lookahead == '\r' ||
lookahead == ' ') ADVANCE(10);
if (lookahead != 0) ADVANCE(11);
END_STATE();
case 2:
if (eof) ADVANCE(3);
if (lookahead == '$') ADVANCE(4);
if (lookahead == '\\') ADVANCE(12);
if (lookahead == '}') ADVANCE(9);
if (lookahead == '\t' ||
lookahead == '\n' ||
lookahead == '\r' ||
lookahead == ' ') ADVANCE(10);
if (lookahead != 0) ADVANCE(11);
END_STATE();
case 3:
ACCEPT_TOKEN(ts_builtin_sym_end);
END_STATE();
case 4:
ACCEPT_TOKEN(anon_sym_DOLLAR);
if (lookahead == '{') ADVANCE(5);
END_STATE();
case 5:
ACCEPT_TOKEN(anon_sym_DOLLAR_LBRACE);
END_STATE();
case 6:
ACCEPT_TOKEN(anon_sym_RBRACE);
END_STATE();
case 7:
ACCEPT_TOKEN(anon_sym_COLON);
END_STATE();
case 8:
ACCEPT_TOKEN(sym_int);
if (('0' <= lookahead && lookahead <= '9')) ADVANCE(8);
END_STATE();
case 9:
ACCEPT_TOKEN(sym__raw_curly);
if (lookahead == '}') ADVANCE(9);
END_STATE();
case 10:
ACCEPT_TOKEN(sym__plain_text);
if (lookahead == '\\') ADVANCE(12);
if (lookahead == '\t' ||
lookahead == '\n' ||
lookahead == '\r' ||
lookahead == ' ') ADVANCE(10);
if (lookahead != 0 &&
lookahead != '$' &&
lookahead != '}') ADVANCE(11);
END_STATE();
case 11:
ACCEPT_TOKEN(sym__plain_text);
if (lookahead == '\\') ADVANCE(12);
if (lookahead != 0 &&
lookahead != '$' &&
lookahead != '}') ADVANCE(11);
END_STATE();
case 12:
ACCEPT_TOKEN(sym__plain_text);
if (lookahead == '\\') ADVANCE(12);
if (lookahead != 0) ADVANCE(11);
END_STATE();
default:
return false;
}
}
static const TSLexMode ts_lex_modes[STATE_COUNT] = {
[0] = {.lex_state = 0},
[1] = {.lex_state = 2},
[2] = {.lex_state = 2},
[3] = {.lex_state = 2},
[4] = {.lex_state = 1},
[5] = {.lex_state = 1},
[6] = {.lex_state = 2},
[7] = {.lex_state = 2},
[8] = {.lex_state = 1},
[9] = {.lex_state = 2},
[10] = {.lex_state = 2},
[11] = {.lex_state = 2},
[12] = {.lex_state = 1},
[13] = {.lex_state = 1},
[14] = {.lex_state = 2},
[15] = {.lex_state = 1},
[16] = {.lex_state = 0},
[17] = {.lex_state = 0},
[18] = {.lex_state = 0},
[19] = {.lex_state = 0},
[20] = {.lex_state = 0},
[21] = {.lex_state = 0},
[22] = {.lex_state = 0},
[23] = {.lex_state = 0},
[24] = {.lex_state = 0},
};
static const uint16_t ts_parse_table[LARGE_STATE_COUNT][SYMBOL_COUNT] = {
[0] = {
[ts_builtin_sym_end] = ACTIONS(1),
[anon_sym_DOLLAR] = ACTIONS(1),
[anon_sym_DOLLAR_LBRACE] = ACTIONS(1),
[anon_sym_RBRACE] = ACTIONS(1),
[anon_sym_COLON] = ACTIONS(1),
[sym_int] = ACTIONS(1),
[sym__raw_curly] = ACTIONS(1),
},
[1] = {
[sym_snippet] = STATE(20),
[sym__any] = STATE(6),
[sym_tabstop] = STATE(6),
[sym_placeholder] = STATE(6),
[sym_text] = STATE(6),
[aux_sym_snippet_repeat1] = STATE(6),
[anon_sym_DOLLAR] = ACTIONS(3),
[anon_sym_DOLLAR_LBRACE] = ACTIONS(5),
[sym__raw_curly] = ACTIONS(7),
[sym__plain_text] = ACTIONS(9),
},
[2] = {
[sym_snippet] = STATE(18),
[sym__any] = STATE(5),
[sym_tabstop] = STATE(5),
[sym_placeholder] = STATE(5),
[sym_text] = STATE(5),
[aux_sym_snippet_repeat1] = STATE(5),
[anon_sym_DOLLAR] = ACTIONS(11),
[anon_sym_DOLLAR_LBRACE] = ACTIONS(13),
[sym__raw_curly] = ACTIONS(15),
[sym__plain_text] = ACTIONS(17),
},
[3] = {
[sym_snippet] = STATE(22),
[sym__any] = STATE(5),
[sym_tabstop] = STATE(5),
[sym_placeholder] = STATE(5),
[sym_text] = STATE(5),
[aux_sym_snippet_repeat1] = STATE(5),
[anon_sym_DOLLAR] = ACTIONS(11),
[anon_sym_DOLLAR_LBRACE] = ACTIONS(13),
[sym__raw_curly] = ACTIONS(15),
[sym__plain_text] = ACTIONS(17),
},
[4] = {
[sym__any] = STATE(4),
[sym_tabstop] = STATE(4),
[sym_placeholder] = STATE(4),
[sym_text] = STATE(4),
[aux_sym_snippet_repeat1] = STATE(4),
[anon_sym_DOLLAR] = ACTIONS(19),
[anon_sym_DOLLAR_LBRACE] = ACTIONS(22),
[anon_sym_RBRACE] = ACTIONS(25),
[sym__raw_curly] = ACTIONS(27),
[sym__plain_text] = ACTIONS(30),
},
[5] = {
[sym__any] = STATE(4),
[sym_tabstop] = STATE(4),
[sym_placeholder] = STATE(4),
[sym_text] = STATE(4),
[aux_sym_snippet_repeat1] = STATE(4),
[anon_sym_DOLLAR] = ACTIONS(11),
[anon_sym_DOLLAR_LBRACE] = ACTIONS(13),
[anon_sym_RBRACE] = ACTIONS(33),
[sym__raw_curly] = ACTIONS(15),
[sym__plain_text] = ACTIONS(17),
},
[6] = {
[sym__any] = STATE(7),
[sym_tabstop] = STATE(7),
[sym_placeholder] = STATE(7),
[sym_text] = STATE(7),
[aux_sym_snippet_repeat1] = STATE(7),
[ts_builtin_sym_end] = ACTIONS(35),
[anon_sym_DOLLAR] = ACTIONS(3),
[anon_sym_DOLLAR_LBRACE] = ACTIONS(5),
[sym__raw_curly] = ACTIONS(7),
[sym__plain_text] = ACTIONS(9),
},
[7] = {
[sym__any] = STATE(7),
[sym_tabstop] = STATE(7),
[sym_placeholder] = STATE(7),
[sym_text] = STATE(7),
[aux_sym_snippet_repeat1] = STATE(7),
[ts_builtin_sym_end] = ACTIONS(37),
[anon_sym_DOLLAR] = ACTIONS(39),
[anon_sym_DOLLAR_LBRACE] = ACTIONS(42),
[sym__raw_curly] = ACTIONS(45),
[sym__plain_text] = ACTIONS(48),
},
};
static const uint16_t ts_small_parse_table[] = {
[0] = 2,
ACTIONS(53), 1,
sym__plain_text,
ACTIONS(51), 4,
anon_sym_DOLLAR,
anon_sym_DOLLAR_LBRACE,
anon_sym_RBRACE,
sym__raw_curly,
[10] = 2,
ACTIONS(55), 2,
ts_builtin_sym_end,
sym__plain_text,
ACTIONS(57), 3,
anon_sym_DOLLAR,
anon_sym_DOLLAR_LBRACE,
sym__raw_curly,
[20] = 2,
ACTIONS(53), 2,
ts_builtin_sym_end,
sym__plain_text,
ACTIONS(51), 3,
anon_sym_DOLLAR,
anon_sym_DOLLAR_LBRACE,
sym__raw_curly,
[30] = 2,
ACTIONS(59), 2,
ts_builtin_sym_end,
sym__plain_text,
ACTIONS(61), 3,
anon_sym_DOLLAR,
anon_sym_DOLLAR_LBRACE,
sym__raw_curly,
[40] = 2,
ACTIONS(65), 1,
sym__plain_text,
ACTIONS(63), 4,
anon_sym_DOLLAR,
anon_sym_DOLLAR_LBRACE,
anon_sym_RBRACE,
sym__raw_curly,
[50] = 2,
ACTIONS(55), 1,
sym__plain_text,
ACTIONS(57), 4,
anon_sym_DOLLAR,
anon_sym_DOLLAR_LBRACE,
anon_sym_RBRACE,
sym__raw_curly,
[60] = 2,
ACTIONS(65), 2,
ts_builtin_sym_end,
sym__plain_text,
ACTIONS(63), 3,
anon_sym_DOLLAR,
anon_sym_DOLLAR_LBRACE,
sym__raw_curly,
[70] = 2,
ACTIONS(59), 1,
sym__plain_text,
ACTIONS(61), 4,
anon_sym_DOLLAR,
anon_sym_DOLLAR_LBRACE,
anon_sym_RBRACE,
sym__raw_curly,
[80] = 2,
ACTIONS(67), 1,
anon_sym_RBRACE,
ACTIONS(69), 1,
anon_sym_COLON,
[87] = 2,
ACTIONS(71), 1,
anon_sym_RBRACE,
ACTIONS(73), 1,
anon_sym_COLON,
[94] = 1,
ACTIONS(75), 1,
anon_sym_RBRACE,
[98] = 1,
ACTIONS(77), 1,
sym_int,
[102] = 1,
ACTIONS(79), 1,
ts_builtin_sym_end,
[106] = 1,
ACTIONS(81), 1,
sym_int,
[110] = 1,
ACTIONS(83), 1,
anon_sym_RBRACE,
[114] = 1,
ACTIONS(85), 1,
sym_int,
[118] = 1,
ACTIONS(87), 1,
sym_int,
};
static const uint32_t ts_small_parse_table_map[] = {
[SMALL_STATE(8)] = 0,
[SMALL_STATE(9)] = 10,
[SMALL_STATE(10)] = 20,
[SMALL_STATE(11)] = 30,
[SMALL_STATE(12)] = 40,
[SMALL_STATE(13)] = 50,
[SMALL_STATE(14)] = 60,
[SMALL_STATE(15)] = 70,
[SMALL_STATE(16)] = 80,
[SMALL_STATE(17)] = 87,
[SMALL_STATE(18)] = 94,
[SMALL_STATE(19)] = 98,
[SMALL_STATE(20)] = 102,
[SMALL_STATE(21)] = 106,
[SMALL_STATE(22)] = 110,
[SMALL_STATE(23)] = 114,
[SMALL_STATE(24)] = 118,
};
static const TSParseActionEntry ts_parse_actions[] = {
[0] = {.entry = {.count = 0, .reusable = false}},
[1] = {.entry = {.count = 1, .reusable = false}}, RECOVER(),
[3] = {.entry = {.count = 1, .reusable = false}}, SHIFT(19),
[5] = {.entry = {.count = 1, .reusable = false}}, SHIFT(24),
[7] = {.entry = {.count = 1, .reusable = false}}, SHIFT(14),
[9] = {.entry = {.count = 1, .reusable = true}}, SHIFT(14),
[11] = {.entry = {.count = 1, .reusable = false}}, SHIFT(21),
[13] = {.entry = {.count = 1, .reusable = false}}, SHIFT(23),
[15] = {.entry = {.count = 1, .reusable = false}}, SHIFT(12),
[17] = {.entry = {.count = 1, .reusable = true}}, SHIFT(12),
[19] = {.entry = {.count = 2, .reusable = false}}, REDUCE(aux_sym_snippet_repeat1, 2), SHIFT_REPEAT(21),
[22] = {.entry = {.count = 2, .reusable = false}}, REDUCE(aux_sym_snippet_repeat1, 2), SHIFT_REPEAT(23),
[25] = {.entry = {.count = 1, .reusable = false}}, REDUCE(aux_sym_snippet_repeat1, 2),
[27] = {.entry = {.count = 2, .reusable = false}}, REDUCE(aux_sym_snippet_repeat1, 2), SHIFT_REPEAT(12),
[30] = {.entry = {.count = 2, .reusable = true}}, REDUCE(aux_sym_snippet_repeat1, 2), SHIFT_REPEAT(12),
[33] = {.entry = {.count = 1, .reusable = false}}, REDUCE(sym_snippet, 1),
[35] = {.entry = {.count = 1, .reusable = true}}, REDUCE(sym_snippet, 1),
[37] = {.entry = {.count = 1, .reusable = true}}, REDUCE(aux_sym_snippet_repeat1, 2),
[39] = {.entry = {.count = 2, .reusable = false}}, REDUCE(aux_sym_snippet_repeat1, 2), SHIFT_REPEAT(19),
[42] = {.entry = {.count = 2, .reusable = false}}, REDUCE(aux_sym_snippet_repeat1, 2), SHIFT_REPEAT(24),
[45] = {.entry = {.count = 2, .reusable = false}}, REDUCE(aux_sym_snippet_repeat1, 2), SHIFT_REPEAT(14),
[48] = {.entry = {.count = 2, .reusable = true}}, REDUCE(aux_sym_snippet_repeat1, 2), SHIFT_REPEAT(14),
[51] = {.entry = {.count = 1, .reusable = false}}, REDUCE(sym_tabstop, 3),
[53] = {.entry = {.count = 1, .reusable = true}}, REDUCE(sym_tabstop, 3),
[55] = {.entry = {.count = 1, .reusable = true}}, REDUCE(sym_tabstop, 2),
[57] = {.entry = {.count = 1, .reusable = false}}, REDUCE(sym_tabstop, 2),
[59] = {.entry = {.count = 1, .reusable = true}}, REDUCE(sym_placeholder, 5),
[61] = {.entry = {.count = 1, .reusable = false}}, REDUCE(sym_placeholder, 5),
[63] = {.entry = {.count = 1, .reusable = false}}, REDUCE(sym_text, 1),
[65] = {.entry = {.count = 1, .reusable = true}}, REDUCE(sym_text, 1),
[67] = {.entry = {.count = 1, .reusable = true}}, SHIFT(10),
[69] = {.entry = {.count = 1, .reusable = true}}, SHIFT(2),
[71] = {.entry = {.count = 1, .reusable = true}}, SHIFT(8),
[73] = {.entry = {.count = 1, .reusable = true}}, SHIFT(3),
[75] = {.entry = {.count = 1, .reusable = true}}, SHIFT(11),
[77] = {.entry = {.count = 1, .reusable = true}}, SHIFT(9),
[79] = {.entry = {.count = 1, .reusable = true}}, ACCEPT_INPUT(),
[81] = {.entry = {.count = 1, .reusable = true}}, SHIFT(13),
[83] = {.entry = {.count = 1, .reusable = true}}, SHIFT(15),
[85] = {.entry = {.count = 1, .reusable = true}}, SHIFT(17),
[87] = {.entry = {.count = 1, .reusable = true}}, SHIFT(16),
};
#ifdef __cplusplus
extern "C" {
#endif
#ifdef _WIN32
#define extern __declspec(dllexport)
#endif
extern const TSLanguage *tree_sitter_snippet(void) {
static const TSLanguage language = {
.version = LANGUAGE_VERSION,
.symbol_count = SYMBOL_COUNT,
.alias_count = ALIAS_COUNT,
.token_count = TOKEN_COUNT,
.external_token_count = EXTERNAL_TOKEN_COUNT,
.state_count = STATE_COUNT,
.large_state_count = LARGE_STATE_COUNT,
.production_id_count = PRODUCTION_ID_COUNT,
.field_count = FIELD_COUNT,
.max_alias_sequence_length = MAX_ALIAS_SEQUENCE_LENGTH,
.parse_table = &ts_parse_table[0][0],
.small_parse_table = ts_small_parse_table,
.small_parse_table_map = ts_small_parse_table_map,
.parse_actions = ts_parse_actions,
.symbol_names = ts_symbol_names,
.symbol_metadata = ts_symbol_metadata,
.public_symbol_map = ts_symbol_map,
.alias_map = ts_non_terminal_alias_map,
.alias_sequences = &ts_alias_sequences[0][0],
.lex_modes = ts_lex_modes,
.lex_fn = ts_lex,
};
return &language;
}
#ifdef __cplusplus
}
#endif

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#ifndef TREE_SITTER_PARSER_H_
#define TREE_SITTER_PARSER_H_
#ifdef __cplusplus
extern "C" {
#endif
#include <stdbool.h>
#include <stdint.h>
#include <stdlib.h>
#define ts_builtin_sym_error ((TSSymbol)-1)
#define ts_builtin_sym_end 0
#define TREE_SITTER_SERIALIZATION_BUFFER_SIZE 1024
typedef uint16_t TSStateId;
#ifndef TREE_SITTER_API_H_
typedef uint16_t TSSymbol;
typedef uint16_t TSFieldId;
typedef struct TSLanguage TSLanguage;
#endif
typedef struct {
TSFieldId field_id;
uint8_t child_index;
bool inherited;
} TSFieldMapEntry;
typedef struct {
uint16_t index;
uint16_t length;
} TSFieldMapSlice;
typedef struct {
bool visible;
bool named;
bool supertype;
} TSSymbolMetadata;
typedef struct TSLexer TSLexer;
struct TSLexer {
int32_t lookahead;
TSSymbol result_symbol;
void (*advance)(TSLexer *, bool);
void (*mark_end)(TSLexer *);
uint32_t (*get_column)(TSLexer *);
bool (*is_at_included_range_start)(const TSLexer *);
bool (*eof)(const TSLexer *);
};
typedef enum {
TSParseActionTypeShift,
TSParseActionTypeReduce,
TSParseActionTypeAccept,
TSParseActionTypeRecover,
} TSParseActionType;
typedef union {
struct {
uint8_t type;
TSStateId state;
bool extra;
bool repetition;
} shift;
struct {
uint8_t type;
uint8_t child_count;
TSSymbol symbol;
int16_t dynamic_precedence;
uint16_t production_id;
} reduce;
uint8_t type;
} TSParseAction;
typedef struct {
uint16_t lex_state;
uint16_t external_lex_state;
} TSLexMode;
typedef union {
TSParseAction action;
struct {
uint8_t count;
bool reusable;
} entry;
} TSParseActionEntry;
struct TSLanguage {
uint32_t version;
uint32_t symbol_count;
uint32_t alias_count;
uint32_t token_count;
uint32_t external_token_count;
uint32_t state_count;
uint32_t large_state_count;
uint32_t production_id_count;
uint32_t field_count;
uint16_t max_alias_sequence_length;
const uint16_t *parse_table;
const uint16_t *small_parse_table;
const uint32_t *small_parse_table_map;
const TSParseActionEntry *parse_actions;
const char * const *symbol_names;
const char * const *field_names;
const TSFieldMapSlice *field_map_slices;
const TSFieldMapEntry *field_map_entries;
const TSSymbolMetadata *symbol_metadata;
const TSSymbol *public_symbol_map;
const uint16_t *alias_map;
const TSSymbol *alias_sequences;
const TSLexMode *lex_modes;
bool (*lex_fn)(TSLexer *, TSStateId);
bool (*keyword_lex_fn)(TSLexer *, TSStateId);
TSSymbol keyword_capture_token;
struct {
const bool *states;
const TSSymbol *symbol_map;
void *(*create)(void);
void (*destroy)(void *);
bool (*scan)(void *, TSLexer *, const bool *symbol_whitelist);
unsigned (*serialize)(void *, char *);
void (*deserialize)(void *, const char *, unsigned);
} external_scanner;
const TSStateId *primary_state_ids;
};
/*
* Lexer Macros
*/
#define START_LEXER() \
bool result = false; \
bool skip = false; \
bool eof = false; \
int32_t lookahead; \
goto start; \
next_state: \
lexer->advance(lexer, skip); \
start: \
skip = false; \
lookahead = lexer->lookahead;
#define ADVANCE(state_value) \
{ \
state = state_value; \
goto next_state; \
}
#define SKIP(state_value) \
{ \
skip = true; \
state = state_value; \
goto next_state; \
}
#define ACCEPT_TOKEN(symbol_value) \
result = true; \
lexer->result_symbol = symbol_value; \
lexer->mark_end(lexer);
#define END_STATE() return result;
/*
* Parse Table Macros
*/
#define SMALL_STATE(id) id - LARGE_STATE_COUNT
#define STATE(id) id
#define ACTIONS(id) id
#define SHIFT(state_value) \
{{ \
.shift = { \
.type = TSParseActionTypeShift, \
.state = state_value \
} \
}}
#define SHIFT_REPEAT(state_value) \
{{ \
.shift = { \
.type = TSParseActionTypeShift, \
.state = state_value, \
.repetition = true \
} \
}}
#define SHIFT_EXTRA() \
{{ \
.shift = { \
.type = TSParseActionTypeShift, \
.extra = true \
} \
}}
#define REDUCE(symbol_val, child_count_val, ...) \
{{ \
.reduce = { \
.type = TSParseActionTypeReduce, \
.symbol = symbol_val, \
.child_count = child_count_val, \
__VA_ARGS__ \
}, \
}}
#define RECOVER() \
{{ \
.type = TSParseActionTypeRecover \
}}
#define ACCEPT_INPUT() \
{{ \
.type = TSParseActionTypeAccept \
}}
#ifdef __cplusplus
}
#endif
#endif // TREE_SITTER_PARSER_H_

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use anyhow::{anyhow, Result};
use smallvec::SmallVec;
use std::{collections::BTreeMap, ops::Range};
use tree_sitter::{Parser, TreeCursor};
#[derive(Default)]
pub struct Snippet {
pub text: String,
pub tabstops: Vec<SmallVec<[Range<usize>; 2]>>,
}
impl Snippet {
pub fn parse(source: &str) -> Result<Self> {
let mut parser = Parser::new();
parser
.set_language(tree_sitter_snippet::language())
.unwrap();
let tree = parser.parse(source, None).unwrap();
if tree.root_node().has_error() {
return Err(anyhow!("invalid snippet"));
}
let mut text = String::new();
let mut tabstops = BTreeMap::new();
let mut cursor = tree.root_node().walk();
parse_snippet_node(&mut cursor, &mut text, &mut tabstops, source)?;
Ok(Snippet {
text,
tabstops: tabstops.into_values().collect(),
})
}
}
fn parse_snippet_node(
cursor: &mut TreeCursor,
text: &mut String,
tabstops: &mut BTreeMap<usize, SmallVec<[Range<usize>; 2]>>,
source: &str,
) -> Result<()> {
cursor.goto_first_child();
loop {
let node = cursor.node();
match node.kind() {
"text" => text.push_str(&source[node.byte_range()]),
"tabstop" => {
if let Some(int_node) = node.named_child(0) {
let index = source[int_node.byte_range()].parse::<usize>()?;
tabstops
.entry(index)
.or_insert(SmallVec::new())
.push(text.len()..text.len());
}
}
"placeholder" => {
cursor.goto_first_child();
cursor.goto_next_sibling();
let int_node = cursor.node();
let index = source[int_node.byte_range()].parse::<usize>()?;
cursor.goto_next_sibling();
cursor.goto_next_sibling();
let range_start = text.len();
parse_snippet_node(cursor, text, tabstops, source)?;
tabstops
.entry(index)
.or_insert(SmallVec::new())
.push(range_start..text.len());
cursor.goto_parent();
}
_ => {}
}
if !cursor.goto_next_sibling() {
break;
}
}
cursor.goto_parent();
Ok(())
}
#[cfg(test)]
mod tests {
use super::*;
#[test]
fn test_parse_snippet_with_tabstops() {
let snippet = Snippet::parse("one$1two").unwrap();
assert_eq!(snippet.text, "onetwo");
assert_eq!(
snippet
.tabstops
.iter()
.map(SmallVec::as_slice)
.collect::<Vec<_>>(),
&[vec![3..3]]
);
}
#[test]
fn test_parse_snippet_with_placeholders() {
let snippet = Snippet::parse("one${1:two}three").unwrap();
assert_eq!(snippet.text, "onetwothree");
assert_eq!(
snippet
.tabstops
.iter()
.map(SmallVec::as_slice)
.collect::<Vec<_>>(),
&[vec![3..6]]
);
}
#[test]
fn test_parse_snippet_with_nested_placeholders() {
let snippet = Snippet::parse(
"for (${1:var ${2:i} = 0; ${2:i} < ${3:${4:array}.length}; ${2:i}++}) {$5}",
)
.unwrap();
assert_eq!(snippet.text, "for (var i = 0; i < array.length; i++) {}");
assert_eq!(
snippet
.tabstops
.iter()
.map(SmallVec::as_slice)
.collect::<Vec<_>>(),
&[
vec![5..37],
vec![9..10, 16..17, 34..35],
vec![20..32],
vec![20..25],
vec![40..40],
]
);
}
}