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//! FIXME: write short doc here
use std::fmt;
#[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, Copy, Clone, Eq, PartialEq, Hash)]
pub enum UncertainIntTy {
Unknown,
Known(IntTy),
}
impl From<IntTy> for UncertainIntTy {
fn from(ty: IntTy) -> Self {
UncertainIntTy::Known(ty)
}
}
impl fmt::Display for UncertainIntTy {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
match *self {
UncertainIntTy::Unknown => write!(f, "{{integer}}"),
UncertainIntTy::Known(ty) => write!(f, "{}", ty),
}
}
}
#[derive(Debug, Copy, Clone, Eq, PartialEq, Hash)]
pub enum UncertainFloatTy {
Unknown,
Known(FloatTy),
}
impl From<FloatTy> for UncertainFloatTy {
fn from(ty: FloatTy) -> Self {
UncertainFloatTy::Known(ty)
}
}
impl fmt::Display for UncertainFloatTy {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
match *self {
UncertainFloatTy::Unknown => write!(f, "{{float}}"),
UncertainFloatTy::Known(ty) => write!(f, "{}", ty),
}
}
}
#[derive(Copy, Clone, Eq, PartialEq, Hash)]
pub struct IntTy {
pub signedness: Signedness,
pub bitness: IntBitness,
}
impl fmt::Debug for IntTy {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
fmt::Display::fmt(self, f)
}
}
impl fmt::Display for IntTy {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
write!(f, "{}", self.ty_to_string())
}
}
impl IntTy {
pub fn isize() -> IntTy {
IntTy { signedness: Signedness::Signed, bitness: IntBitness::Xsize }
}
pub fn i8() -> IntTy {
IntTy { signedness: Signedness::Signed, bitness: IntBitness::X8 }
}
pub fn i16() -> IntTy {
IntTy { signedness: Signedness::Signed, bitness: IntBitness::X16 }
}
pub fn i32() -> IntTy {
IntTy { signedness: Signedness::Signed, bitness: IntBitness::X32 }
}
pub fn i64() -> IntTy {
IntTy { signedness: Signedness::Signed, bitness: IntBitness::X64 }
}
pub fn i128() -> IntTy {
IntTy { signedness: Signedness::Signed, bitness: IntBitness::X128 }
}
pub fn usize() -> IntTy {
IntTy { signedness: Signedness::Unsigned, bitness: IntBitness::Xsize }
}
pub fn u8() -> IntTy {
IntTy { signedness: Signedness::Unsigned, bitness: IntBitness::X8 }
}
pub fn u16() -> IntTy {
IntTy { signedness: Signedness::Unsigned, bitness: IntBitness::X16 }
}
pub fn u32() -> IntTy {
IntTy { signedness: Signedness::Unsigned, bitness: IntBitness::X32 }
}
pub fn u64() -> IntTy {
IntTy { signedness: Signedness::Unsigned, bitness: IntBitness::X64 }
}
pub fn u128() -> IntTy {
IntTy { signedness: Signedness::Unsigned, bitness: IntBitness::X128 }
}
pub(crate) fn ty_to_string(self) -> &'static str {
match (self.signedness, self.bitness) {
(Signedness::Signed, IntBitness::Xsize) => "isize",
(Signedness::Signed, IntBitness::X8) => "i8",
(Signedness::Signed, IntBitness::X16) => "i16",
(Signedness::Signed, IntBitness::X32) => "i32",
(Signedness::Signed, IntBitness::X64) => "i64",
(Signedness::Signed, IntBitness::X128) => "i128",
(Signedness::Unsigned, IntBitness::Xsize) => "usize",
(Signedness::Unsigned, IntBitness::X8) => "u8",
(Signedness::Unsigned, IntBitness::X16) => "u16",
(Signedness::Unsigned, IntBitness::X32) => "u32",
(Signedness::Unsigned, IntBitness::X64) => "u64",
(Signedness::Unsigned, IntBitness::X128) => "u128",
}
}
pub(crate) fn from_suffix(suffix: &str) -> Option<IntTy> {
match suffix {
"isize" => Some(IntTy::isize()),
"i8" => Some(IntTy::i8()),
"i16" => Some(IntTy::i16()),
"i32" => Some(IntTy::i32()),
"i64" => Some(IntTy::i64()),
"i128" => Some(IntTy::i128()),
"usize" => Some(IntTy::usize()),
"u8" => Some(IntTy::u8()),
"u16" => Some(IntTy::u16()),
"u32" => Some(IntTy::u32()),
"u64" => Some(IntTy::u64()),
"u128" => Some(IntTy::u128()),
_ => None,
}
}
}
#[derive(Copy, Clone, PartialEq, Eq, Hash)]
pub struct FloatTy {
pub bitness: FloatBitness,
}
impl fmt::Debug for FloatTy {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
fmt::Display::fmt(self, f)
}
}
impl fmt::Display for FloatTy {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
write!(f, "{}", self.ty_to_string())
}
}
impl FloatTy {
pub fn f32() -> FloatTy {
FloatTy { bitness: FloatBitness::X32 }
}
pub fn f64() -> FloatTy {
FloatTy { bitness: FloatBitness::X64 }
}
pub(crate) fn ty_to_string(self) -> &'static str {
match self.bitness {
FloatBitness::X32 => "f32",
FloatBitness::X64 => "f64",
}
}
pub(crate) fn from_suffix(suffix: &str) -> Option<FloatTy> {
match suffix {
"f32" => Some(FloatTy::f32()),
"f64" => Some(FloatTy::f64()),
_ => None,
}
}
}
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