riscv64-kernel/crates/std/src/prelude.rs

pub mod rust_2024 {
    pub use crate::print;
    pub use crate::println;
    pub use alloc::format;
    pub use alloc::vec;

    #[stable(feature = "rust1", since = "1.0.0")]
    #[doc(no_inline)]
    pub use crate::borrow::ToOwned;
    #[stable(feature = "rust1", since = "1.0.0")]
    #[doc(no_inline)]
    pub use crate::boxed::Box;
    #[stable(feature = "rust1", since = "1.0.0")]
    #[doc(no_inline)]
    pub use crate::string::{String, ToString};
    #[stable(feature = "rust1", since = "1.0.0")]
    #[doc(no_inline)]
    pub use crate::vec::Vec;

    // Re-exported built-in macros and traits
    #[stable(feature = "builtin_macro_prelude", since = "1.38.0")]
    #[doc(no_inline)]
    #[expect(deprecated)]
    pub use core::prelude::v1::{
        Clone, Copy, Debug, Default, Eq, Hash, Ord, PartialEq, PartialOrd, assert, assert_eq,
        assert_ne, cfg, column, compile_error, concat, debug_assert, debug_assert_eq,
        debug_assert_ne, env, file, format_args, include, include_bytes, include_str, line,
        matches, module_path, option_env, stringify, todo, r#try, unimplemented, unreachable,
        write, writeln,
    };

    #[stable(feature = "builtin_macro_prelude", since = "1.38.0")]
    #[doc(no_inline)]
    pub use crate::thread_local;

    #[stable(feature = "cfg_select", since = "1.95.0")]
    #[doc(no_inline)]
    pub use core::prelude::v1::cfg_select;

    #[unstable(
        feature = "concat_bytes",
        issue = "87555",
        reason = "`concat_bytes` is not stable enough for use and is subject to change"
    )]
    #[doc(no_inline)]
    pub use core::prelude::v1::concat_bytes;

    #[unstable(feature = "const_format_args", issue = "none")]
    #[doc(no_inline)]
    pub use core::prelude::v1::const_format_args;

    #[unstable(
        feature = "log_syntax",
        issue = "29598",
        reason = "`log_syntax!` is not stable enough for use and is subject to change"
    )]
    #[doc(no_inline)]
    pub use core::prelude::v1::log_syntax;

    #[unstable(
        feature = "trace_macros",
        issue = "29598",
        reason = "`trace_macros` is not stable enough for use and is subject to change"
    )]
    #[doc(no_inline)]
    pub use core::prelude::v1::trace_macros;

    // Do not `doc(no_inline)` so that they become doc items on their own
    // (no public module for them to be re-exported from).
    #[stable(feature = "builtin_macro_prelude", since = "1.38.0")]
    pub use core::prelude::v1::{
        alloc_error_handler, bench, derive, global_allocator, test, test_case,
    };

    #[unstable(feature = "derive_const", issue = "118304")]
    pub use core::prelude::v1::derive_const;

    // Do not `doc(no_inline)` either.
    #[unstable(
        feature = "cfg_accessible",
        issue = "64797",
        reason = "`cfg_accessible` is not fully implemented"
    )]
    pub use core::prelude::v1::cfg_accessible;

    // Do not `doc(no_inline)` either.
    #[unstable(
        feature = "cfg_eval",
        issue = "82679",
        reason = "`cfg_eval` is a recently implemented feature"
    )]
    pub use core::prelude::v1::cfg_eval;

    // Do not `doc(no_inline)` either.
    #[unstable(
        feature = "type_ascription",
        issue = "23416",
        reason = "placeholder syntax for type ascription"
    )]
    pub use core::prelude::v1::type_ascribe;

    // Do not `doc(no_inline)` either.
    #[unstable(
        feature = "deref_patterns",
        issue = "87121",
        reason = "placeholder syntax for deref patterns"
    )]
    pub use core::prelude::v1::deref;

    // Do not `doc(no_inline)` either.
    #[unstable(
        feature = "type_alias_impl_trait",
        issue = "63063",
        reason = "`type_alias_impl_trait` has open design concerns"
    )]
    pub use core::prelude::v1::define_opaque;

    #[unstable(feature = "extern_item_impls", issue = "125418")]
    pub use core::prelude::v1::{eii, unsafe_eii};

    #[unstable(feature = "eii_internals", issue = "none")]
    pub use core::prelude::v1::eii_declaration;

    #[stable(feature = "prelude_2021", since = "1.55.0")]
    #[doc(no_inline)]
    pub use core::prelude::rust_2021::*;

    #[stable(feature = "prelude_2024", since = "1.85.0")]
    #[doc(no_inline)]
    pub use core::prelude::rust_2024::*;

    #[stable(feature = "rust1", since = "1.0.0")]
    #[doc(no_inline)]
    pub use crate::convert::{AsMut, AsRef, From, Into};

    extern crate alloc;

    struct GlobalAllocator;

    #[core::prelude::v1::global_allocator]
    static GLOBAL_ALLOCATOR: GlobalAllocator = GlobalAllocator;

    unsafe impl core::alloc::GlobalAlloc for GlobalAllocator {
        unsafe fn alloc(&self, layout: core::alloc::Layout) -> *mut u8 {
            crate::syscall::alloc(layout)
        }

        unsafe fn dealloc(&self, ptr: *mut u8, layout: core::alloc::Layout) {
            crate::syscall::dealloc(ptr, layout)
        }
    }

    #[panic_handler]
    fn panic(_panic_info: &core::panic::PanicInfo) -> ! {
        // TODO print
        loop {}
    }

    /// # Safety
    /// `argc` and `argv` are passed by the kernel
    #[unsafe(no_mangle)]
    pub unsafe extern "C" fn _start(argc: isize, argv: *const *const u8) -> isize {
        unsafe extern "Rust" {
            fn main(argc: isize, argv: *const *const u8) -> isize;
        }

        unsafe { main(argc, argv) }
    }

    #[lang = "start"]
    pub fn lang_start<T: crate::process::Termination + 'static>(
        main: fn() -> T,
        argc: isize,
        argv: *const *const u8,
        _sigpipe: u8,
    ) -> isize {
        println!("{}", argc);
        println!("{:?}", argv);
        main().report().to_isize()
    }
}