Keywords

Domains: Dart

The following table lists the words that the Dart language treats specially.

abstract ²

as ²

assert

async ¹

await ³

break

case

catch

class

const

continue

covariant ²

default

deferred ²

do

dynamic ²

else

enum

export ²

extends

external ²

factory ²

false

final

finally

for

Function ²

get ²

hide ¹

if

implements ²

import ²

in

interface ²

is

library ²

mixin ²

new

null

on ¹

operator ²

part ²

rethrow

return

set ²

show ¹

static ²

super

switch

sync ¹

this

throw

true

try

typedef ²

var

void

while

with

yield ³

Avoid using these words as identifiers. However, if necessary, the keywords marked with superscripts can be identifiers:
Words with the superscript 1 are contextual keywords, which have meaning only in specific places. They’re valid identifiers everywhere.
Words with the superscript 2 are built-in identifiers. To simplify the task of porting JavaScript code to Dart, these keywords are valid identifiers in most places, but they can’t be used as class or type names, or as import prefixes.
Words with the superscript 3 are newer, limited reserved words related to the asynchrony support that was added after Dart’s 1.0 release. You can’t use await or yield as an identifier in any function body marked with async, async*, or sync*.

All other words in the table are reserved words, which can’t be identifiers.

Keywords

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