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Use Haxe's -D flag to toggle code paths at compile time. This guide covers guarding code with #if defined(...), passing defines in build.hxml or CLI, forcing clean rebuilds, and verifying the output on JavaScript, C++, and Neko targets.
Haxe's -D flag defines a symbol, not a value, so -D debug=0 still enables #if debug. Here is how to keep conditional compilation small, typed and checkable across targets.
Learn how to use Haxe externs to get compile-time type safety when calling JavaScript libraries, with a lodash chunk example and conditional compilation tips.
Learn how to use Haxe conditional compilation to manage platform-specific APIs and reduce binary size by ensuring incompatible code is never emitted to the target.
Goal: Determine how nested conditional compilation interacts with macro expansion The Haxe compiler evaluates conditional compilation directives (#if, #elseif, #else) at compile‑time, but the interaction with macro‑based transformations is not fully specified. When complex nested #if blocks are expanded by a macro, the order in which the compiler evaluates t
Delphi Conditional Compilation Defines The $IFDEF compiler directive enables platform-specific code sections through conditional compilation. Delphi automatically sets platform defines like MSWINDOWS and MSOSX based on the target platform, but the exact set of available defines varies across Delphi versions. The {$IFDEF CONDITIONAIREDITOR} directive specific
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