bendns' repos / rust-analyzer
Unnamed repository; edit this file 'description' to name the repository.
Diffstat (limited to 'crates/hir-def/src/layout.rs')
-rw-r--r--crates/hir-def/src/layout.rs97
1 files changed, 0 insertions, 97 deletions
diff --git a/crates/hir-def/src/layout.rs b/crates/hir-def/src/layout.rs
deleted file mode 100644
index 49b1190ad4..0000000000
--- a/crates/hir-def/src/layout.rs
+++ /dev/null
@@ -1,97 +0,0 @@
-//! Definitions needed for computing data layout of types.
-
-use std::cmp;
-
-use la_arena::{Idx, RawIdx};
-pub use rustc_abi::{
- Abi, AbiAndPrefAlign, AddressSpace, Align, Endian, FieldsShape, Integer, IntegerType,
- LayoutCalculator, Niche, Primitive, ReprFlags, ReprOptions, Scalar, Size, StructKind,
- TargetDataLayout, TargetDataLayoutErrors, WrappingRange,
-};
-
-use crate::LocalEnumVariantId;
-
-#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
-pub struct RustcEnumVariantIdx(pub LocalEnumVariantId);
-
-impl rustc_index::vec::Idx for RustcEnumVariantIdx {
- fn new(idx: usize) -> Self {
- RustcEnumVariantIdx(Idx::from_raw(RawIdx::from(idx as u32)))
- }
-
- fn index(self) -> usize {
- u32::from(self.0.into_raw()) as usize
- }
-}
-
-pub type Layout = rustc_abi::LayoutS<RustcEnumVariantIdx>;
-pub type TagEncoding = rustc_abi::TagEncoding<RustcEnumVariantIdx>;
-pub type Variants = rustc_abi::Variants<RustcEnumVariantIdx>;
-
-pub trait IntegerExt {
- fn repr_discr(
- dl: &TargetDataLayout,
- repr: &ReprOptions,
- min: i128,
- max: i128,
- ) -> Result<(Integer, bool), LayoutError>;
-}
-
-impl IntegerExt for Integer {
- /// Finds the appropriate Integer type and signedness for the given
- /// signed discriminant range and `#[repr]` attribute.
- /// N.B.: `u128` values above `i128::MAX` will be treated as signed, but
- /// that shouldn't affect anything, other than maybe debuginfo.
- fn repr_discr(
- dl: &TargetDataLayout,
- repr: &ReprOptions,
- min: i128,
- max: i128,
- ) -> Result<(Integer, bool), LayoutError> {
- // Theoretically, negative values could be larger in unsigned representation
- // than the unsigned representation of the signed minimum. However, if there
- // are any negative values, the only valid unsigned representation is u128
- // which can fit all i128 values, so the result remains unaffected.
- let unsigned_fit = Integer::fit_unsigned(cmp::max(min as u128, max as u128));
- let signed_fit = cmp::max(Integer::fit_signed(min), Integer::fit_signed(max));
-
- if let Some(ity) = repr.int {
- let discr = Integer::from_attr(dl, ity);
- let fit = if ity.is_signed() { signed_fit } else { unsigned_fit };
- if discr < fit {
- return Err(LayoutError::UserError(
- "Integer::repr_discr: `#[repr]` hint too small for \
- discriminant range of enum "
- .to_string(),
- ));
- }
- return Ok((discr, ity.is_signed()));
- }
-
- let at_least = if repr.c() {
- // This is usually I32, however it can be different on some platforms,
- // notably hexagon and arm-none/thumb-none
- dl.c_enum_min_size
- } else {
- // repr(Rust) enums try to be as small as possible
- Integer::I8
- };
-
- // If there are no negative values, we can use the unsigned fit.
- Ok(if min >= 0 {
- (cmp::max(unsigned_fit, at_least), false)
- } else {
- (cmp::max(signed_fit, at_least), true)
- })
- }
-}
-
-#[derive(Debug, PartialEq, Eq, Clone)]
-pub enum LayoutError {
- UserError(String),
- SizeOverflow,
- TargetLayoutNotAvailable,
- HasPlaceholder,
- NotImplemented,
- Unknown,
-}