Syntax¶

This page covers the foundational syntax rules of AISL.

Statements and semicolons¶

Most statements in AISL end with a semicolon (;). The exceptions are declarations and for loops, which use curly braces to delimit their bodies.

let x = 42;                    // semicolon required
append results with value;     // semicolon required
return x + 1;                  // semicolon required
my_function(a, b);             // semicolon required

Block statements do not require a trailing semicolon:

declare m as model { ... }

for 1..10 { ... }

declare f as function(x) { ... }

Comments¶

AISL supports single-line and multi-line comments.

// This is a single-line comment

/* This is a
   multi-line comment */

let x = 42; // inline comment

Comments are ignored by the interpreter and can appear anywhere whitespace is allowed.

Identifiers¶

Identifiers name variables, functions, models, datasets, and other declarations. An identifier must start with a letter or underscore and can contain letters, digits, and underscores.

my_variable
_private
model1
ground_truth

Whitespace¶

Whitespace (spaces, tabs, and newlines) is not significant in AISL. It is used only to separate tokens. You can format your code in any style.

// These are equivalent
let x = 1 + 2;

let x=1+2;

let x =
    1 + 2;

Reserved words¶

The following words have special meaning in AISL and cannot be used as identifiers: