Rollup merge of #59979 - stepancheg:num-size, r=ehuss
to_xe_bytes for isize and usize returns an array of different size ... on different platforms. Official rustdoc of [`usize::to_le_bytes`](https://doc.rust-lang.org/std/primitive.usize.html#method.to_le_bytes) displays signature ``` pub fn to_ne_bytes(self) -> [u8; 8] ``` which might be misleading: this function returns 4 bytes on 32-bit systems. With this commit applied rustdoc for `isize` and `usize` is this: <img width="740" alt="2019-04-15_0020" src="https://user-images.githubusercontent.com/28969/56100765-9f69b380-5f14-11e9-974c-daa25edaa881.png">
This commit is contained in:
Mazdak Farrokhzad
GitHub
commit
229fff3d03
@ -214,11 +214,31 @@ pub mod diy_float;
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mod wrapping;
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macro_rules! usize_isize_to_xe_bytes_doc {
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() => {"
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**Note**: This function returns an array of length 2, 4 or 8 bytes
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depending on the target pointer size.
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"}
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}
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macro_rules! usize_isize_from_xe_bytes_doc {
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() => {"
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**Note**: This function takes an array of length 2, 4 or 8 bytes
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depending on the target pointer size.
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"}
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}
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// `Int` + `SignedInt` implemented for signed integers
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macro_rules! int_impl {
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($SelfT:ty, $ActualT:ident, $UnsignedT:ty, $BITS:expr, $Min:expr, $Max:expr, $Feature:expr,
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$EndFeature:expr, $rot:expr, $rot_op:expr, $rot_result:expr, $swap_op:expr, $swapped:expr,
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$reversed:expr, $le_bytes:expr, $be_bytes:expr) => {
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$reversed:expr, $le_bytes:expr, $be_bytes:expr,
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$to_xe_bytes_doc:expr, $from_xe_bytes_doc:expr) => {
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doc_comment! {
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concat!("Returns the smallest value that can be represented by this integer type.
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@ -2023,7 +2043,9 @@ $EndFeature, "
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doc_comment! {
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concat!("Return the memory representation of this integer as a byte array in
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big-endian (network) byte order.
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",
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$to_xe_bytes_doc,
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"
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# Examples
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```
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@ -2041,7 +2063,9 @@ assert_eq!(bytes, ", $be_bytes, ");
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doc_comment! {
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concat!("Return the memory representation of this integer as a byte array in
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little-endian byte order.
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",
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$to_xe_bytes_doc,
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"
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# Examples
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```
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@ -2064,7 +2088,9 @@ native byte order.
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As the target platform's native endianness is used, portable code
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should use [`to_be_bytes`] or [`to_le_bytes`], as appropriate,
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instead.
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",
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$to_xe_bytes_doc,
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"
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[`to_be_bytes`]: #method.to_be_bytes
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[`to_le_bytes`]: #method.to_le_bytes
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@ -2089,7 +2115,9 @@ assert_eq!(bytes, if cfg!(target_endian = \"big\") {
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doc_comment! {
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concat!("Create an integer value from its representation as a byte array in
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big endian.
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",
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$from_xe_bytes_doc,
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"
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# Examples
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```
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@ -2120,7 +2148,9 @@ doc_comment! {
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concat!("
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Create an integer value from its representation as a byte array in
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little endian.
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",
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$from_xe_bytes_doc,
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"
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# Examples
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```
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@ -2157,7 +2187,9 @@ appropriate instead.
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[`from_be_bytes`]: #method.from_be_bytes
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[`from_le_bytes`]: #method.from_le_bytes
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",
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$from_xe_bytes_doc,
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"
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# Examples
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```
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@ -2193,20 +2225,20 @@ fn read_ne_", stringify!($SelfT), "(input: &mut &[u8]) -> ", stringify!($SelfT),
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#[lang = "i8"]
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impl i8 {
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int_impl! { i8, i8, u8, 8, -128, 127, "", "", 2, "-0x7e", "0xa", "0x12", "0x12", "0x48",
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"[0x12]", "[0x12]" }
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"[0x12]", "[0x12]", "", "" }
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}
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#[lang = "i16"]
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impl i16 {
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int_impl! { i16, i16, u16, 16, -32768, 32767, "", "", 4, "-0x5ffd", "0x3a", "0x1234", "0x3412",
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"0x2c48", "[0x34, 0x12]", "[0x12, 0x34]" }
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"0x2c48", "[0x34, 0x12]", "[0x12, 0x34]", "", "" }
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}
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#[lang = "i32"]
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impl i32 {
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int_impl! { i32, i32, u32, 32, -2147483648, 2147483647, "", "", 8, "0x10000b3", "0xb301",
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"0x12345678", "0x78563412", "0x1e6a2c48", "[0x78, 0x56, 0x34, 0x12]",
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"[0x12, 0x34, 0x56, 0x78]" }
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"[0x12, 0x34, 0x56, 0x78]", "", "" }
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}
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#[lang = "i64"]
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@ -2214,7 +2246,7 @@ impl i64 {
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int_impl! { i64, i64, u64, 64, -9223372036854775808, 9223372036854775807, "", "", 12,
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"0xaa00000000006e1", "0x6e10aa", "0x1234567890123456", "0x5634129078563412",
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"0x6a2c48091e6a2c48", "[0x56, 0x34, 0x12, 0x90, 0x78, 0x56, 0x34, 0x12]",
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"[0x12, 0x34, 0x56, 0x78, 0x90, 0x12, 0x34, 0x56]" }
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"[0x12, 0x34, 0x56, 0x78, 0x90, 0x12, 0x34, 0x56]", "", "" }
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}
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#[lang = "i128"]
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@ -2226,14 +2258,15 @@ impl i128 {
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"[0x12, 0x90, 0x78, 0x56, 0x34, 0x12, 0x90, 0x78, \
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0x56, 0x34, 0x12, 0x90, 0x78, 0x56, 0x34, 0x12]",
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"[0x12, 0x34, 0x56, 0x78, 0x90, 0x12, 0x34, 0x56, \
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0x78, 0x90, 0x12, 0x34, 0x56, 0x78, 0x90, 0x12]" }
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0x78, 0x90, 0x12, 0x34, 0x56, 0x78, 0x90, 0x12]", "", "" }
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}
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#[cfg(target_pointer_width = "16")]
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#[lang = "isize"]
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impl isize {
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int_impl! { isize, i16, u16, 16, -32768, 32767, "", "", 4, "-0x5ffd", "0x3a", "0x1234",
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"0x3412", "0x2c48", "[0x34, 0x12]", "[0x12, 0x34]" }
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"0x3412", "0x2c48", "[0x34, 0x12]", "[0x12, 0x34]",
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usize_isize_to_xe_bytes_doc!(), usize_isize_from_xe_bytes_doc!() }
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}
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#[cfg(target_pointer_width = "32")]
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@ -2241,7 +2274,8 @@ impl isize {
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impl isize {
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int_impl! { isize, i32, u32, 32, -2147483648, 2147483647, "", "", 8, "0x10000b3", "0xb301",
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"0x12345678", "0x78563412", "0x1e6a2c48", "[0x78, 0x56, 0x34, 0x12]",
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"[0x12, 0x34, 0x56, 0x78]" }
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"[0x12, 0x34, 0x56, 0x78]",
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usize_isize_to_xe_bytes_doc!(), usize_isize_from_xe_bytes_doc!() }
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}
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#[cfg(target_pointer_width = "64")]
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@ -2250,14 +2284,16 @@ impl isize {
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int_impl! { isize, i64, u64, 64, -9223372036854775808, 9223372036854775807, "", "",
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12, "0xaa00000000006e1", "0x6e10aa", "0x1234567890123456", "0x5634129078563412",
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"0x6a2c48091e6a2c48", "[0x56, 0x34, 0x12, 0x90, 0x78, 0x56, 0x34, 0x12]",
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"[0x12, 0x34, 0x56, 0x78, 0x90, 0x12, 0x34, 0x56]" }
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"[0x12, 0x34, 0x56, 0x78, 0x90, 0x12, 0x34, 0x56]",
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usize_isize_to_xe_bytes_doc!(), usize_isize_from_xe_bytes_doc!() }
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}
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// `Int` + `UnsignedInt` implemented for unsigned integers
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macro_rules! uint_impl {
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($SelfT:ty, $ActualT:ty, $BITS:expr, $MaxV:expr, $Feature:expr, $EndFeature:expr,
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$rot:expr, $rot_op:expr, $rot_result:expr, $swap_op:expr, $swapped:expr,
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$reversed:expr, $le_bytes:expr, $be_bytes:expr) => {
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$reversed:expr, $le_bytes:expr, $be_bytes:expr,
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$to_xe_bytes_doc:expr, $from_xe_bytes_doc:expr) => {
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doc_comment! {
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concat!("Returns the smallest value that can be represented by this integer type.
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@ -3817,7 +3853,9 @@ $EndFeature, "
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doc_comment! {
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concat!("Return the memory representation of this integer as a byte array in
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big-endian (network) byte order.
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",
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$to_xe_bytes_doc,
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"
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# Examples
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```
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@ -3835,7 +3873,9 @@ assert_eq!(bytes, ", $be_bytes, ");
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doc_comment! {
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concat!("Return the memory representation of this integer as a byte array in
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little-endian byte order.
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",
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$to_xe_bytes_doc,
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"
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# Examples
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```
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@ -3858,7 +3898,9 @@ native byte order.
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As the target platform's native endianness is used, portable code
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should use [`to_be_bytes`] or [`to_le_bytes`], as appropriate,
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instead.
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",
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$to_xe_bytes_doc,
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"
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[`to_be_bytes`]: #method.to_be_bytes
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[`to_le_bytes`]: #method.to_le_bytes
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@ -3883,7 +3925,9 @@ assert_eq!(bytes, if cfg!(target_endian = \"big\") {
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doc_comment! {
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concat!("Create an integer value from its representation as a byte array in
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big endian.
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",
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$from_xe_bytes_doc,
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"
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# Examples
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```
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@ -3914,7 +3958,9 @@ fn read_be_", stringify!($SelfT), "(input: &mut &[u8]) -> ", stringify!($SelfT),
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concat!("
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Create an integer value from its representation as a byte array in
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little endian.
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",
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$from_xe_bytes_doc,
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"
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# Examples
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```
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@ -3951,7 +3997,9 @@ appropriate instead.
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[`from_be_bytes`]: #method.from_be_bytes
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[`from_le_bytes`]: #method.from_le_bytes
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",
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$from_xe_bytes_doc,
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"
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# Examples
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```
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@ -3987,7 +4035,7 @@ fn read_ne_", stringify!($SelfT), "(input: &mut &[u8]) -> ", stringify!($SelfT),
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#[lang = "u8"]
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impl u8 {
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uint_impl! { u8, u8, 8, 255, "", "", 2, "0x82", "0xa", "0x12", "0x12", "0x48", "[0x12]",
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"[0x12]" }
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"[0x12]", "", "" }
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/// Checks if the value is within the ASCII range.
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@ -4506,13 +4554,13 @@ impl u8 {
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#[lang = "u16"]
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impl u16 {
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uint_impl! { u16, u16, 16, 65535, "", "", 4, "0xa003", "0x3a", "0x1234", "0x3412", "0x2c48",
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"[0x34, 0x12]", "[0x12, 0x34]" }
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"[0x34, 0x12]", "[0x12, 0x34]", "", "" }
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}
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#[lang = "u32"]
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impl u32 {
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uint_impl! { u32, u32, 32, 4294967295, "", "", 8, "0x10000b3", "0xb301", "0x12345678",
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"0x78563412", "0x1e6a2c48", "[0x78, 0x56, 0x34, 0x12]", "[0x12, 0x34, 0x56, 0x78]" }
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"0x78563412", "0x1e6a2c48", "[0x78, 0x56, 0x34, 0x12]", "[0x12, 0x34, 0x56, 0x78]", "", "" }
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}
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#[lang = "u64"]
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@ -4520,7 +4568,8 @@ impl u64 {
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uint_impl! { u64, u64, 64, 18446744073709551615, "", "", 12, "0xaa00000000006e1", "0x6e10aa",
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"0x1234567890123456", "0x5634129078563412", "0x6a2c48091e6a2c48",
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"[0x56, 0x34, 0x12, 0x90, 0x78, 0x56, 0x34, 0x12]",
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"[0x12, 0x34, 0x56, 0x78, 0x90, 0x12, 0x34, 0x56]" }
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"[0x12, 0x34, 0x56, 0x78, 0x90, 0x12, 0x34, 0x56]",
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"", ""}
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}
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#[lang = "u128"]
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@ -4531,20 +4580,23 @@ impl u128 {
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"[0x12, 0x90, 0x78, 0x56, 0x34, 0x12, 0x90, 0x78, \
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0x56, 0x34, 0x12, 0x90, 0x78, 0x56, 0x34, 0x12]",
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"[0x12, 0x34, 0x56, 0x78, 0x90, 0x12, 0x34, 0x56, \
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0x78, 0x90, 0x12, 0x34, 0x56, 0x78, 0x90, 0x12]" }
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0x78, 0x90, 0x12, 0x34, 0x56, 0x78, 0x90, 0x12]",
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"", ""}
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}
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#[cfg(target_pointer_width = "16")]
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#[lang = "usize"]
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impl usize {
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uint_impl! { usize, u16, 16, 65535, "", "", 4, "0xa003", "0x3a", "0x1234", "0x3412", "0x2c48",
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"[0x34, 0x12]", "[0x12, 0x34]" }
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"[0x34, 0x12]", "[0x12, 0x34]",
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usize_isize_to_xe_bytes_doc!(), usize_isize_from_xe_bytes_doc!() }
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}
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#[cfg(target_pointer_width = "32")]
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#[lang = "usize"]
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impl usize {
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uint_impl! { usize, u32, 32, 4294967295, "", "", 8, "0x10000b3", "0xb301", "0x12345678",
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"0x78563412", "0x1e6a2c48", "[0x78, 0x56, 0x34, 0x12]", "[0x12, 0x34, 0x56, 0x78]" }
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"0x78563412", "0x1e6a2c48", "[0x78, 0x56, 0x34, 0x12]", "[0x12, 0x34, 0x56, 0x78]",
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usize_isize_to_xe_bytes_doc!(), usize_isize_from_xe_bytes_doc!() }
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}
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#[cfg(target_pointer_width = "64")]
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@ -4553,7 +4605,8 @@ impl usize {
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uint_impl! { usize, u64, 64, 18446744073709551615, "", "", 12, "0xaa00000000006e1", "0x6e10aa",
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"0x1234567890123456", "0x5634129078563412", "0x6a2c48091e6a2c48",
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"[0x56, 0x34, 0x12, 0x90, 0x78, 0x56, 0x34, 0x12]",
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"[0x12, 0x34, 0x56, 0x78, 0x90, 0x12, 0x34, 0x56]" }
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"[0x12, 0x34, 0x56, 0x78, 0x90, 0x12, 0x34, 0x56]",
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usize_isize_to_xe_bytes_doc!(), usize_isize_from_xe_bytes_doc!() }
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}
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/// A classification of floating point numbers.
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