str_array 1.1.0

Fixed-size `str` and `CStr` types backed by an array
Documentation 
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extern crate autocfg;

fn main() {
    let mut ac = autocfg::new();
    ac.set_no_std(true);
    ac.emit_expression_cfg("const { _ = &mut (); }", "has_const_mut");
    ac.emit_path_cfg("::core::error::Error", "has_core_error");
}