ti-el

A TL (Type Language) parser. Uses pegjs.

Installation

$ npm install ti-el

Usage

const { parse, tldoc } = require('ti-el')
const ast = parse('req_pq#60469778 nonce:int128 = ResPQ;')
console.dir(ast, { depth: null })

• The AST types
• The PEG.js grammar

You can import Flow or TypeScript types for the AST:

import type { TLProgram, CombinatorDeclaration /* ... */ } from 'tl-parser/ast'

The tldoc function can parse documentation comments like the following, which are used in TDLib:

//@class MaskPoint @description Part of the face, relative to which a mask should be placed

//@description A mask should be placed relatively to the mouth
maskPointMouth = MaskPoint;

//@description A mask should be placed relatively to the chin
maskPointChin = MaskPoint;

//@description Position on a photo where a mask should be placed @point Part of the face, relative to which the mask should be placed
//@x_shift Shift by X-axis measured in widths of the mask scaled to the face size, from left to right. (For example, -1.0 will place the mask just to the left of the default mask position)
//@y_shift Shift by Y-axis measured in heights of the mask scaled to the face size, from top to bottom. (For example, 1.0 will place the mask just below the default mask position)
//@scale Mask scaling coefficient. (For example, 2.0 means a doubled size)
maskPosition point:MaskPoint x_shift:double y_shift:double scale:double = MaskPosition;

This package also provides a ti-el console utility.

Example

int ? = Int;
---functions---
req_pq#60469778 nonce:int128 = ResPQ;

--->

{ type: 'TLProgram',
  start: { offset: 1, line: 2, column: 1 },
  end: { offset: 68, line: 5, column: 1 },
  constructors:
   { type: 'ConstructorDeclarations',
     start: { offset: 1, line: 2, column: 1 },
     end: { offset: 68, line: 5, column: 1 },
     declarations:
      [ { type: 'BuiltinCombinatorDeclaration',
          start: { offset: 1, line: 2, column: 1 },
          end: { offset: 13, line: 2, column: 13 },
          id:
           { type: 'ShortCombinatorName',
             start: { offset: 1, line: 2, column: 1 },
             end: { offset: 4, line: 2, column: 4 },
             name: 'int' },
          result:
           { type: 'BoxedTypeIdentifier',
             start: { offset: 9, line: 2, column: 9 },
             end: { offset: 12, line: 2, column: 12 },
             name: 'Int' } } ] },
  functions:
   { type: 'FunctionDeclarations',
     start: { offset: 1, line: 2, column: 1 },
     end: { offset: 68, line: 5, column: 1 },
     declarations:
      [ { type: 'CombinatorDeclaration',
          start: { offset: 30, line: 4, column: 1 },
          end: { offset: 67, line: 4, column: 38 },
          id:
           { type: 'FullCombinatorName',
             start: { offset: 30, line: 4, column: 1 },
             end: { offset: 45, line: 4, column: 16 },
             name: 'req_pq',
             magic: '60469778' },
          optionalArgs: [],
          args:
           [ { type: 'Argument',
               start: { offset: 46, line: 4, column: 17 },
               end: { offset: 58, line: 4, column: 29 },
               id:
                { type: 'VariableIdentifier',
                  start: { offset: 46, line: 4, column: 17 },
                  end: { offset: 51, line: 4, column: 22 },
                  name: 'nonce' },
               conditionalDef: null,
               argType:
                { type: 'TypeExpression',
                  start: { offset: 52, line: 4, column: 23 },
                  end: { offset: 58, line: 4, column: 29 },
                  expression:
                   { type: 'SimpleTypeIdentifier',
                     start: { offset: 52, line: 4, column: 23 },
                     end: { offset: 58, line: 4, column: 29 },
                     name: 'int128' } } } ],
          bang: false,
          resultType:
           { type: 'ResultType',
             start: { offset: 61, line: 4, column: 32 },
             end: { offset: 66, line: 4, column: 37 },
             id:
              { type: 'BoxedTypeIdentifier',
                start: { offset: 61, line: 4, column: 32 },
                end: { offset: 66, line: 4, column: 37 },
                name: 'ResPQ' },
             expression:
              { type: 'EExpression',
                start: { offset: 61, line: 4, column: 32 },
                end: { offset: 66, line: 4, column: 37 },
                subexpressions: [] } } } ] } }

---

This library was written in 2018. Previously, the ti-el package was named tl-parser on npm. This library is meant to be replaced by camlproto/tl (written in OCaml) in the future, but that one cannot parse tldoc yet.

See this for the old structure of this repository.

For transforming TDLib's td_api.tl into TypeScript and Flow typings using tldoc, see tdlib-types in the tdl repository.

There's also tl-transform, but it's currently not used anywhere and deprecated.

The project is not actively maintained.