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//! This module defines built-in types.
//!
//! A peculiarity of built-in types is that they are always available and are
//! not associated with any particular crate.
use std::fmt;
use hir_expand::name::{name, AsName, Name};
#[derive(Debug, Copy, Clone, Eq, PartialEq, Hash)]
pub enum Signedness {
Signed,
Unsigned,
}
#[derive(Debug, Copy, Clone, Eq, PartialEq, Hash)]
pub enum IntBitness {
Xsize,
X8,
X16,
X32,
X64,
X128,
}
#[derive(Debug, Copy, Clone, Eq, PartialEq, Hash)]
pub enum FloatBitness {
X32,
X64,
}
#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
pub struct BuiltinInt {
pub signedness: Signedness,
pub bitness: IntBitness,
}
#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
pub struct BuiltinFloat {
pub bitness: FloatBitness,
}
#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
pub enum BuiltinType {
Char,
Bool,
Str,
Int(BuiltinInt),
Float(BuiltinFloat),
}
impl BuiltinType {
#[rustfmt::skip]
pub const ALL: &'static [(Name, BuiltinType)] = &[
(name![char], BuiltinType::Char),
(name![bool], BuiltinType::Bool),
(name![str], BuiltinType::Str),
(name![isize], BuiltinType::Int(BuiltinInt::ISIZE)),
(name![i8], BuiltinType::Int(BuiltinInt::I8)),
(name![i16], BuiltinType::Int(BuiltinInt::I16)),
(name![i32], BuiltinType::Int(BuiltinInt::I32)),
(name![i64], BuiltinType::Int(BuiltinInt::I64)),
(name![i128], BuiltinType::Int(BuiltinInt::I128)),
(name![usize], BuiltinType::Int(BuiltinInt::USIZE)),
(name![u8], BuiltinType::Int(BuiltinInt::U8)),
(name![u16], BuiltinType::Int(BuiltinInt::U16)),
(name![u32], BuiltinType::Int(BuiltinInt::U32)),
(name![u64], BuiltinType::Int(BuiltinInt::U64)),
(name![u128], BuiltinType::Int(BuiltinInt::U128)),
(name![f32], BuiltinType::Float(BuiltinFloat::F32)),
(name![f64], BuiltinType::Float(BuiltinFloat::F64)),
];
}
impl AsName for BuiltinType {
fn as_name(&self) -> Name {
match self {
BuiltinType::Char => name![char],
BuiltinType::Bool => name![bool],
BuiltinType::Str => name![str],
BuiltinType::Int(BuiltinInt { signedness, bitness }) => match (signedness, bitness) {
(Signedness::Signed, IntBitness::Xsize) => name![isize],
(Signedness::Signed, IntBitness::X8) => name![i8],
(Signedness::Signed, IntBitness::X16) => name![i16],
(Signedness::Signed, IntBitness::X32) => name![i32],
(Signedness::Signed, IntBitness::X64) => name![i64],
(Signedness::Signed, IntBitness::X128) => name![i128],
(Signedness::Unsigned, IntBitness::Xsize) => name![usize],
(Signedness::Unsigned, IntBitness::X8) => name![u8],
(Signedness::Unsigned, IntBitness::X16) => name![u16],
(Signedness::Unsigned, IntBitness::X32) => name![u32],
(Signedness::Unsigned, IntBitness::X64) => name![u64],
(Signedness::Unsigned, IntBitness::X128) => name![u128],
},
BuiltinType::Float(BuiltinFloat { bitness }) => match bitness {
FloatBitness::X32 => name![f32],
FloatBitness::X64 => name![f64],
},
}
}
}
impl fmt::Display for BuiltinType {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
let type_name = self.as_name();
type_name.fmt(f)
}
}
#[rustfmt::skip]
impl BuiltinInt {
pub const ISIZE: BuiltinInt = BuiltinInt { signedness: Signedness::Signed, bitness: IntBitness::Xsize };
pub const I8 : BuiltinInt = BuiltinInt { signedness: Signedness::Signed, bitness: IntBitness::X8 };
pub const I16 : BuiltinInt = BuiltinInt { signedness: Signedness::Signed, bitness: IntBitness::X16 };
pub const I32 : BuiltinInt = BuiltinInt { signedness: Signedness::Signed, bitness: IntBitness::X32 };
pub const I64 : BuiltinInt = BuiltinInt { signedness: Signedness::Signed, bitness: IntBitness::X64 };
pub const I128 : BuiltinInt = BuiltinInt { signedness: Signedness::Signed, bitness: IntBitness::X128 };
pub const USIZE: BuiltinInt = BuiltinInt { signedness: Signedness::Unsigned, bitness: IntBitness::Xsize };
pub const U8 : BuiltinInt = BuiltinInt { signedness: Signedness::Unsigned, bitness: IntBitness::X8 };
pub const U16 : BuiltinInt = BuiltinInt { signedness: Signedness::Unsigned, bitness: IntBitness::X16 };
pub const U32 : BuiltinInt = BuiltinInt { signedness: Signedness::Unsigned, bitness: IntBitness::X32 };
pub const U64 : BuiltinInt = BuiltinInt { signedness: Signedness::Unsigned, bitness: IntBitness::X64 };
pub const U128 : BuiltinInt = BuiltinInt { signedness: Signedness::Unsigned, bitness: IntBitness::X128 };
pub fn from_suffix(suffix: &str) -> Option<BuiltinInt> {
let res = match suffix {
"isize" => Self::ISIZE,
"i8" => Self::I8,
"i16" => Self::I16,
"i32" => Self::I32,
"i64" => Self::I64,
"i128" => Self::I128,
"usize" => Self::USIZE,
"u8" => Self::U8,
"u16" => Self::U16,
"u32" => Self::U32,
"u64" => Self::U64,
"u128" => Self::U128,
_ => return None,
};
Some(res)
}
}
#[rustfmt::skip]
impl BuiltinFloat {
pub const F32: BuiltinFloat = BuiltinFloat { bitness: FloatBitness::X32 };
pub const F64: BuiltinFloat = BuiltinFloat { bitness: FloatBitness::X64 };
pub fn from_suffix(suffix: &str) -> Option<BuiltinFloat> {
let res = match suffix {
"f32" => BuiltinFloat::F32,
"f64" => BuiltinFloat::F64,
_ => return None,
};
Some(res)
}
}
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