Nitro is designed to be easy to learn, most of it syntax is inspired by other languages like Rust, Kotlin, and JavaScript.
Single line comments start with // and comment the rest of the line.
// This is a single line comment
Multi-line comments start with /* and end with */. They can span multiple lines.
/*
This
is
a
multi-line
comment
*/
Nested multi-line comments are allowed.
/*
* /* Nested comments are allowed */
*/
Some words are reserved and cannot be used as identifiers. These are:
this This fun let mod struct ret size_of option internal rec tag defer type_alias
enum nothing when match alias if else for in while repeat loop is as true false
null include break continue use mut json! test! include_as_bytes! include_as_string!
Some of these are not used, but they are reserved for future use.
For example, null is not used in Nitro, but attempting to use it as an identifier will result in a syntax error.
Identifiers are used to name variables, functions, types, and other entities. They must start with a letter followed by letters, digits, or underscores. They cannot start with an underscore. Identifiers are case-sensitive.
foo
fooBar
BarFoo
foo_bar
baz42
ALL_CAPS
Semicolons are optional in Nitro. They are equivalent to newlines, you can use them to separate multiple statements on the same line.
a = 1; b = 2; c = 3
In most places, commas are optional. They are recommended, but if you prefer not to use them, you can omit them.
All those are valid:
// Single line
a = [1, 2, 3]
// Multi-line with trailing comma
a = [
1,
2,
3,
]
// No commas at all
a = [
1
2
3
]