lexical structure

Source Files

encoding: UTF-8
extension: .fe (e.g., main.fe, server.fe)

Identifiers

[_A-Za-z][_0-9A-Za-z]*

Unicode letters are allowed in identifiers.

Whitespace

Spaces, tabs, and newlines are insignificant except within strings and comments.

Comments

Line Comments

// this is a line comment

Block Comments

/* this is a
   block comment */

Block comments may be nested.

Keywords

See reference/keywords.md for the complete list.

Reserved in α1:

const, var, function, return, defer, inout, import, export, package,
type, role, domain, effects, capability, with, context,
match, if, else, for, while, break, continue,
comptime, derivation, use, error, as, where,
asm, component

Future-reserved (not used in α1):

trait, class, interface

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