Lamplight

https://sr.ht/~jive/lamplight

Lamplight is a concatenative language which expresses itself using only whitespace and the following ASCII characters:

: ( ) [ ] { } | " ' ` ! @ # $ % ^ & . , ? _ = ~ - + * < > \ /

Memory operations and all syntactic constructs are implemented through ASCII sigils and delimited constructs; this abstraction is the core idea of lamplight and what differentiates it from other concatenative languages.

  &   duplicate
  #   reference
  ^   delete
  %   swap
  $   mutate

Code can be composed in any Unicode character set, making it a language agnostic to any spoken/written one, a computational extension to the common -+/=.

:∑ 0 % [ + ] /

{ 2 1 5 7 } ∑ .
                  ⟨ 15 ⟩

It's design is based around it's encoding type; UTF-8, and makes working with Unicode runes and string composition really easy and explicit.

"I says" 'Mabel "So{`sp}anyways {#1} to {^} {^}..."
                       ⟨ "So anyways, I says to Mabel I says..." ⟩

It's design is naturally reductive by nature; due to it's type system which is based upon type-matching against the stack.

1 (
  int { ++ } 
  str [ . ]
)
                  ⟨ 2 ⟩

This naturally results in the ability to define words which begin with a type match; giving us the ability to define a type-specific implementation for any word.

:++ (
  str { "{^1}{^}" }
)

'hi 'howareyou ++
                  ⟨ 'hihowareyou ⟩

The few abstractions provided by lamplight provide a syntactically simple interface which is capable of expressing higher level language concepts with only low level operations; while doubly making code that is concise and beautifully readable.