_Builtin_float is a Swift overlay that bridges the C standard library's float.h header, surfacing its floating-point limit constants to Swift code. Through it you access values such as DBL_MAX and FLT_EPSILON to reason about the range and precision of the platform's floating-point types. The overlay defines no types of its own; it exposes these C macros as Swift constants on iOS, macOS, tvOS, watchOS, and visionOS.
Globals 30
DBL_EPSILONDBL_MANT_DIGDBL_MAXDBL_MAX_EXPDBL_MINDBL_MIN_EXPDBL_TRUE_MINFLT_EPSILONFLT_MANT_DIGFLT_MAXFLT_MAX_EXPFLT_MINFLT_MIN_EXPFLT_RADIXFLT_TRUE_MINFLT_RADIXFLT_MANT_DIGFLT_MAX_EXPFLT_MIN_EXPFLT_MAXFLT_EPSILONFLT_MINFLT_TRUE_MINDBL_MANT_DIGDBL_MAX_EXPDBL_MIN_EXPDBL_MAXDBL_EPSILONDBL_MINDBL_TRUE_MIN