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morel-hugo / Micro quick syntax reference

October 09, 2025 18:40
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Micro quick syntax reference

Micro quick syntax reference

A quick syntax reference for the Micro programming language

Generic syntax

Script : Any sequence of expressions, separated by ;, last semicolon optionnal

Comments : inline with ## or multiline enclosed in #' ... '#

Literals

Base building block of every Micro script

Are however almost never explicitely written (but implicitely generated by special syntactic forms)

Syntax : 'lit or '`lit with spaces or special chars`

Operators

Arity : sets how many operands it takes

Precedence : sets who gets the parentheses

Syntax :

  • any combination of &|~^@=+-*%!$/:.,?!<>
  • #alphanumeric_chars_with_no_spaces

Special operators :

  • #call : f(...)
  • #index : x[...]
  • #list: [a;b;...]
  • #tuple : (a;b;...)

Primitive operators :

  • #number
    • 12 is [#number '`12`]
    • 1.2 is [#number '`1.2`]
    • 0b011 is [#number '`011` 'b]
  • #string
    • "s" is [#string 's]
    • "s0 {arg1} ... {argn} sn" is [#string 's0 arg1 ... argn 'sn]
  • #name
    • identifier is [#name 'identifier]

Macros

Are valid expressions

Three styles : block, inline, declarative

Block :

  • block (args) { stmts } limb { stmts }
  • block { stmts } limb { stmts }
  • block (args) stmt limb stmt
  • block stmt limb stmt

Inline :

  • inline (args) limb expr
  • inline arg limb expr
  • inline

Declarative :

  • decl name(args) limb expr { stmts }
  • decl name limb expr { stmts }

where stmts and args are (possibly empty) lists of expressions seperated by semicolons (last one being optionnal)