Is there a formal (ideally BNF) typescript js language grammar (or only typescript subset)? [closed]

Question

I'm looking for the Typescript grammar. Not the parser-lexer, but only the formal grammar description. I want to implement ts it's code folding and basic static code analyzing as plugin to one simple linux IDE for GNOME.

Anemography

Why can't you just use the compiler itself to build the AST? It's open source after all... – Pfister

Answer 1

The formal grammar is in Appendix A of the TypeScript Language Reference, version 1.8 if which is found here (for current version)

Narration

There was actually a fun to read holiwar with devs on that matter in a ticket of typescript repo. The conclusion was to drop the specification because they have no resources to keep it up to date I take it. – Preposterous

Answer 2

Since typescript is a strict superset of Ecmascript 5 (http://www.ecma-international.org/publications/files/ECMA-ST/Ecma-262.pdf/), you could exend any ecmascript bnf with syntax definitions from the Typescript spec.

A starting point could be: http://www.antlr3.org/grammar/1153976512034/ecmascriptA3.g

Praetor

Answer 3

An ANTLR4 grammar, but admittedly "not exactly ... to TypeScript standard" (it's a pain there are so few official grammars for existing programming languages):

https://github.com/antlr/grammars-v4/tree/master/typescript

Necrophilia

Answer 4

Maybe you can find references in the source code, e.g. compiler/tokens.js

Valediction

He is asking for a grammar definition like coffeescript.org/documentation/docs/grammar.html . – Runge

It helps to find out which tokens are used and how tey are defined, but it is only lexer part.I need a set of rules in some formal notation to create parser and to be able to build AST from the given typescript text. – Anemography

Chrome warns about that link: "The site ahead contains harmful programs" – Accent