define: DUK_USE_REPL_ISNAN introduced: 1.0.0 default: false tags: - portability description: > Provide a built-in replacement for isnan(), duk_repl_isnan. When enabled, define DUK_ISNAN as duk_repl_isnan. # FIXME: the dependency between DUK_USE_REPL_ISNAN and DUK_ISNAN # is a bit awkward.