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Haxe Complete Course / Metaprogramming & Targets

Metadata

Learn Metadata in Haxe through the exact construct, a dedicated example, a boundary case, and a mastery check.

12 min read • Advanced

Metadata is an atomic Haxe lesson inside Metaprogramming & Targets. The example uses the specific syntax, command, API, instruction, or language rule named by this lesson.

Study the construct itself, then change one relevant input and predict the result before running it. That keeps this lesson focused on Metadata rather than on generic Haxe syntax.

Topic-specific example

haxe-07-03.hx
haxe Try It Live 
@:keep class Service { public function new(){} } class Main { static function main(){ trace(Service); } }
Edge case / engineering note

Compile Metadata for at least one target and watch for target-specific behavior where the feature crosses a platform boundary.

Content source & attribution
Original Syntaxis Content · Original Syntaxis Content

Lesson quizzes

Metadata Mastery Check →
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Compiler defines
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@:keep metadata