Re: Programming language similarity

Derek Jones <derek@NOSPAM-knosof.co.uk>
Mon, 25 Apr 2022 08:59:44 +0100

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From: Derek Jones <derek@NOSPAM-knosof.co.uk>
Newsgroups: comp.compilers
Date: Mon, 25 Apr 2022 08:59:44 +0100
Organization: Compilers Central
References: 22-04-012
Injection-Info: gal.iecc.com; posting-host="news.iecc.com:2001:470:1f07:1126:0:676f:7373:6970"; logging-data="52400"; mail-complaints-to="abuse@iecc.com"
Keywords: design, semantics
Posted-Date: 25 Apr 2022 12:17:24 EDT
Content-Language: en-US
In-Reply-To: 22-04-012

John,


> https://shape-of-code.com/2022/04/24/programming-language-similarity-based-on-their-traits/
> [That seems awfully simplistic.  Fortran and PL/I both have FORMAT statements that look
> superficially similar but the semantics are very different. -John]


Many keywords have different meanings, e.g., the do keyword in Fortran/C.


Even binary operators differ, binary plus for string concatenation.


The blog post uses a token based approach, which does not require
lots of time to gather the data.


A semantics based approach requires lots of head scratching. I made a
start by collecting information on function definitions (mostly forms
of argument passing). The semantic traits I looked at tended to have a
small number of characteristics, so some form of aggregating is needed
to create significant differences.

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