diff options
Diffstat (limited to 'library/core/src/fmt')
| -rw-r--r-- | library/core/src/fmt/mod.rs | 32 | ||||
| -rw-r--r-- | library/core/src/fmt/rt/v1.rs | 6 |
2 files changed, 30 insertions, 8 deletions
diff --git a/library/core/src/fmt/mod.rs b/library/core/src/fmt/mod.rs index c9821bf81..fcda097f0 100644 --- a/library/core/src/fmt/mod.rs +++ b/library/core/src/fmt/mod.rs @@ -267,7 +267,7 @@ extern "C" { /// family of functions. It contains a function to format the given value. At /// compile time it is ensured that the function and the value have the correct /// types, and then this struct is used to canonicalize arguments to one type. -#[cfg_attr(not(bootstrap), lang = "format_argument")] +#[lang = "format_argument"] #[derive(Copy, Clone)] #[allow(missing_debug_implementations)] #[unstable(feature = "fmt_internals", reason = "internal to format_args!", issue = "none")] @@ -280,7 +280,7 @@ pub struct ArgumentV1<'a> { /// This struct represents the unsafety of constructing an `Arguments`. /// It exists, rather than an unsafe function, in order to simplify the expansion /// of `format_args!(..)` and reduce the scope of the `unsafe` block. -#[cfg_attr(not(bootstrap), lang = "format_unsafe_arg")] +#[lang = "format_unsafe_arg"] #[allow(missing_debug_implementations)] #[doc(hidden)] #[unstable(feature = "fmt_internals", reason = "internal to format_args!", issue = "none")] @@ -392,8 +392,31 @@ enum FlagV1 { } impl<'a> Arguments<'a> { + #[doc(hidden)] + #[inline] + #[unstable(feature = "fmt_internals", issue = "none")] + #[rustc_const_unstable(feature = "const_fmt_arguments_new", issue = "none")] + pub const fn new_const(pieces: &'a [&'static str]) -> Self { + if pieces.len() > 1 { + panic!("invalid args"); + } + Arguments { pieces, fmt: None, args: &[] } + } + /// When using the format_args!() macro, this function is used to generate the /// Arguments structure. + #[cfg(not(bootstrap))] + #[doc(hidden)] + #[inline] + #[unstable(feature = "fmt_internals", reason = "internal to format_args!", issue = "none")] + pub fn new_v1(pieces: &'a [&'static str], args: &'a [ArgumentV1<'a>]) -> Arguments<'a> { + if pieces.len() < args.len() || pieces.len() > args.len() + 1 { + panic!("invalid args"); + } + Arguments { pieces, fmt: None, args } + } + + #[cfg(bootstrap)] #[doc(hidden)] #[inline] #[unstable(feature = "fmt_internals", reason = "internal to format_args!", issue = "none")] @@ -417,8 +440,7 @@ impl<'a> Arguments<'a> { #[doc(hidden)] #[inline] #[unstable(feature = "fmt_internals", reason = "internal to format_args!", issue = "none")] - #[rustc_const_unstable(feature = "const_fmt_arguments_new", issue = "none")] - pub const fn new_v1_formatted( + pub fn new_v1_formatted( pieces: &'a [&'static str], args: &'a [ArgumentV1<'a>], fmt: &'a [rt::v1::Argument], @@ -475,7 +497,7 @@ impl<'a> Arguments<'a> { /// ``` /// /// [`format()`]: ../../std/fmt/fn.format.html -#[cfg_attr(not(bootstrap), lang = "format_arguments")] +#[lang = "format_arguments"] #[stable(feature = "rust1", since = "1.0.0")] #[derive(Copy, Clone)] pub struct Arguments<'a> { diff --git a/library/core/src/fmt/rt/v1.rs b/library/core/src/fmt/rt/v1.rs index 11a50951a..6d70796f7 100644 --- a/library/core/src/fmt/rt/v1.rs +++ b/library/core/src/fmt/rt/v1.rs @@ -5,7 +5,7 @@ //! these can be statically allocated and are slightly optimized for the runtime #![allow(missing_debug_implementations)] -#[cfg_attr(not(bootstrap), lang = "format_placeholder")] +#[lang = "format_placeholder"] #[derive(Copy, Clone)] // FIXME: Rename this to Placeholder pub struct Argument { @@ -37,7 +37,7 @@ impl Argument { } /// Possible alignments that can be requested as part of a formatting directive. -#[cfg_attr(not(bootstrap), lang = "format_alignment")] +#[lang = "format_alignment"] #[derive(Copy, Clone, PartialEq, Eq)] pub enum Alignment { /// Indication that contents should be left-aligned. @@ -51,7 +51,7 @@ pub enum Alignment { } /// Used by [width](https://doc.rust-lang.org/std/fmt/#width) and [precision](https://doc.rust-lang.org/std/fmt/#precision) specifiers. -#[cfg_attr(not(bootstrap), lang = "format_count")] +#[lang = "format_count"] #[derive(Copy, Clone)] pub enum Count { /// Specified with a literal number, stores the value |