Dart Future
Dart async Future SAMPLE for analysis-server tests.
Future<int> doubleAsync(int n) async => n * 2;
void main() async {
print(await doubleAsync(21));
}
Specifications
- Language
- dart
- Role
- idiomatic sample
- Line Endings
- LF
- Wave
- G
What is a .dart file?
Dart (.dart) is a plain-text source file for the Dart language used by Flutter and Dart VM apps. It is object-oriented with sound null safety, async futures/streams, and a concise syntax.
How to use this file
Use an example .dart file to test Dart analyzers, formatters (dart format), Flutter tooling, and syntax highlighters.
How to use this file for testing
“Dart Future” is a deterministic Novus Examples fixture for Syntax highlighting, Code parsing, Editor testing. Idiomatic hello-world programs and realistic snippets across sixteen languages, exercising comments, string escapes, interpolation, numeric literals, and language keywords — for testing syntax highlighters, editor themes, and tree-sitter grammars.
Documented properties for this file: idiomatic sample · dart · LF. Compare results against paired or grouped companions on this page when present (clean↔damaged, searchable↔scanned, or format twins) so scores stay reproducible across runs.
Download the file once, keep the path stable in CI or local scripts, and treat the spec table as the contract: dimensions, seeds, field lists, and roles are intentional. Corrupt or invalid samples are labelled as such — expect parsers to fail loudly rather than silently accept them.
This is a short, known-correct source file. Run it through your syntax highlighter, linter, formatter, tree-sitter grammar, or parser, and open it in the in-browser editor to tweak and re-download. Each snippet exercises comments, string escapes, literals, and language keywords.
Code examples
dart run future_sample.dartRelated files
- dartDart CounterTiny Dart class with a counter — fixture for Dart analysis servers.
- dartDart HelloMinimal Dart hello-world for Flutter/Dart IDE and highlight tests.
- cC — Hello WorldThe classic hello-world in C — an include, main, and printf — for testing highlighters, C compilers, and parsers against the canonical first program.
- cC — Linked list (structs, malloc, pointers)A realistic C program: a singly linked list with a typedef struct, malloc/free memory management, pointer walking, and error handling — for testing highlighters, compilers, and static analysers.
- cC StructC struct SAMPLE for clangd / highlighter fixtures.
- csC# FibonacciA small C# iterator Fibonacci utility — realistic snippet for language tooling.
Generated by generation/code_wave_g.py. Free for any use, no attribution required — license.