There is a haskell tutorial where you write a scheme in what they claim is 48 hrs. I want to say Why s potion took about two months but he wrote an interpretor and JIT compiler for it. So I would say if you know what you are doing it would take a week to a month or two depending on time and talent for a first useful release. Writing a grammar in antlr will take you longer to learn the tools than it will to write the grammar if you make it simple enough.

Whatever you are trying to do - stop it.

If there is no programming language that can satisfy you, maybe is time to improve your programming skills?

If I was you I would describe the problem (i.e. what kind of the application you need to write) and ask WHICH language would be best for it.

All super-inventions usually end up as being rewritten to more standard language so more people can work on it. I ve heard about many companies trying to invent their own in-house language and they were ending up rewriting it to C or C# to actually be able to hire someone who can work on it straight away.

Bad move, really, bad move.

well, that s a pretty big task !

have you thought of everything which comprises only a compiler ? how vast the knowledge you have to learn (grammar, machine code, platform convention, file format, ...) ? let alone some very simple things like operator precedence, variable scope, ...

a compiler is not for the faint-hearted. if you never did that, writing an interpreter for a very simple language (like a very simplified pascal) may already take a great amount of time.

if you can afford doing it, do it, because that s a lot of fun and you will learn a lot by doing it. but do not think your language will be more than a toy before some years. and even then, it will surely miss a lot of features found in many other common languages.

This really depends on the person. Some people write a grammar as if they are writing a letter in their native tongue.

Some people, can fiddle with this forever (like me). Let alone creating a compiler or interpreter from it.

If this is your first language, then this process can take quite a while before the language becomes practical.

After this is completed you ll be needing tons of libraries, before you can do anything useful with it, which also takes a lot of time and dedication

So, even if you re a compilerveteran, this will eat up a lot of time. But bo doubt be a lot of fun too

I would say between 3 and 5 man/year depending on the complexity of the language and the optimizations of the compiler.

If this is a personal project I would recommend going for a .NET language so that you can skip at least the assembly generation an let that part to the JIT. That will take out a great deal of effort while letting you center on the characteristics of the language itself.

It s not THAT difficult to write a compiler. I know it sounds like a pretty big task and indeed is one of the most complicated things to do in programming as it requires you to know a lot about the architecture, optimization and some nasty stuff but at the end is just like any other business, once you get into it and start to learn it just gets easier.

Come on, the best person to answer this question is you yourself! You know your programming abilities and the specific language you have in mind.

In general, I d say it takes something between a week and a decade.

Consider getting your feet wet by writing several DSLs (domain-specific languages). You could potentially leverage an existing Language Workbench to get productive quickly. Alternately you could write the DSL in a language that supports compiler extensibility and use the existing IDEs for the core language.

About a decade (and counting).