Function is_debug_enabled 

pub fn is_debug_enabled() -> bool

Returns true if the SPARSEIR_DEBUG environment variable enables debug diagnostics.

Debug diagnostics are enabled only when SPARSEIR_DEBUG is 1, true, yes or on, in any letter case, the same values pylibsparseir accepts. Any other value, including 0, false, an empty string, or an accepted value with surrounding whitespace, leaves them disabled, as does an unset variable.

The variable is read on every call. debug_warn! and the debug macros of sparse-ir-capi all use this function.