Enum ScalarValue

pub enum ScalarValue {
    Unsigned(UIntTy, u128),
    Signed(IntTy, i128),
}

A scalar value.

Variants

Unsigned(UIntTy, u128)

Signed(IntTy, i128)

Implementations

impl ScalarValue

pub fn is_unsigned(&self) -> bool

pub fn is_signed(&self) -> bool

impl ScalarValue

pub fn as_unsigned(&self) -> Option<(&UIntTy, &u128)>

pub fn as_signed(&self) -> Option<(&IntTy, &i128)>

impl ScalarValue

pub fn as_unsigned_mut(&mut self) -> Option<(&mut UIntTy, &mut u128)>

pub fn as_signed_mut(&mut self) -> Option<(&mut IntTy, &mut i128)>

impl ScalarValue

pub fn variant_name(&self) -> &'static str

impl ScalarValue

pub fn variant_index_arity(&self) -> (u32, usize)

impl ScalarValue

fn ptr_size_max(ptr_size: ByteCount, signed: bool) -> ScalarResult<u128>

fn ptr_size_min(ptr_size: ByteCount, signed: bool) -> ScalarResult<i128>

pub fn get_integer_ty(&self) -> IntegerTy

pub fn is_int(&self) -> bool

pub fn is_uint(&self) -> bool

pub fn as_uint(&self) -> ScalarResult<u128>

When computing the result of binary operations, we convert the values to u128 then back to the target type (while performing dynamic checks of course).

pub fn uint_is_in_bounds(ptr_size: ByteCount, ty: UIntTy, v: u128) -> bool

pub fn from_unchecked_uint(ty: UIntTy, v: u128) -> ScalarValue

pub fn from_uint( ptr_size: ByteCount, ty: UIntTy, v: u128, ) -> ScalarResult<ScalarValue>

pub fn as_int(&self) -> ScalarResult<i128>

When computing the result of binary operations, we convert the values to i128 then back to the target type (while performing dynamic checks of course).

pub fn int_is_in_bounds(ptr_size: ByteCount, ty: IntTy, v: i128) -> bool

pub fn from_unchecked_int(ty: IntTy, v: i128) -> ScalarValue

pub fn to_bits(&self) -> u128

Most integers are represented as u128 by rustc. We must be careful not to sign-extend.

pub fn from_le_bytes(ty: IntegerTy, bytes: [u8; 16]) -> Self

Translates little endian bytes into a corresponding ScalarValue. This needs to do the round-trip to the correct integer type to guarantee that the values are correctly sign-extended (e.g. if the bytes encode -1i8, taking all 16 bytes would lead to the value 255i128 instead of -1i128).

pub fn from_bits(ty: IntegerTy, bits: u128) -> Self

pub fn from_int( ptr_size: ByteCount, ty: IntTy, v: i128, ) -> ScalarResult<ScalarValue>

Warning: most constants are stored as u128 by rustc. When converting to i128, it is not correct to do v as i128, we must reinterpret the bits (see ScalarValue::from_le_bytes).

pub fn to_constant(self) -> ConstantExpr

Trait Implementations

impl AstVisitable for ScalarValue

fn drive<V: VisitAst>(&self, v: &mut V) -> ControlFlow<V::Break>

Recursively visit this type with the provided visitor. This calls the visitor’s visit_$any method if it exists, otherwise visit_inner.

fn drive_mut<V: VisitAstMut>(&mut self, v: &mut V) -> ControlFlow<V::Break>

Recursively visit this type with the provided visitor. This calls the visitor’s visit_$any method if it exists, otherwise visit_inner.

fn name(&self) -> &'static str

The name of the type, used for debug logging.

fn dyn_visit<T: AstVisitable>(&self, f: impl FnMut(&T))

Visit all occurrences of that type inside self, in pre-order traversal.

fn dyn_visit_mut<T: AstVisitable>(&mut self, f: impl FnMut(&mut T))

Visit all occurrences of that type inside self, in pre-order traversal.

impl BodyVisitable for ScalarValue

fn drive_body<V: VisitBody>(&self, v: &mut V) -> ControlFlow<V::Break>

Recursively visit this type with the provided visitor. This calls the visitor’s visit_$any method if it exists, otherwise visit_inner.

fn drive_body_mut<V: VisitBodyMut>( &mut self, v: &mut V, ) -> ControlFlow<V::Break>

Recursively visit this type with the provided visitor. This calls the visitor’s visit_$any method if it exists, otherwise visit_inner.

fn dyn_visit_in_body<T: BodyVisitable>(&self, f: impl FnMut(&T))

Visit all occurrences of that type inside self, in pre-order traversal.

fn dyn_visit_in_body_mut<T: BodyVisitable>(&mut self, f: impl FnMut(&mut T))

Visit all occurrences of that type inside self, in pre-order traversal.

impl Clone for ScalarValue

fn clone(&self) -> ScalarValue

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for ScalarValue

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for ScalarValue

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Display for ScalarValue

fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>

Formats the value using the given formatter.

impl<'s, V> Drive<'s, V> for ScalarValue

where V: Visitor,

fn drive_inner(&'s self, visitor: &mut V) -> ControlFlow<V::Break>

Call v.visit() on the immediate contents of self.

impl<'s, V> DriveMut<'s, V> for ScalarValue

where V: Visitor,

fn drive_inner_mut(&'s mut self, visitor: &mut V) -> ControlFlow<V::Break>

Call v.visit() on the immediate contents of self.

impl Hash for ScalarValue

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl Ord for ScalarValue

fn cmp(&self, other: &ScalarValue) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

where Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized,

Restrict a value to a certain interval.

impl PartialEq for ScalarValue

fn eq(&self, other: &ScalarValue) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl PartialOrd for ScalarValue

fn partial_cmp(&self, other: &ScalarValue) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

fn lt(&self, other: &Rhs) -> bool

Tests less than (for self and other) and is used by the < operator.

fn le(&self, other: &Rhs) -> bool

Tests less than or equal to (for self and other) and is used by the <= operator.

fn gt(&self, other: &Rhs) -> bool

Tests greater than (for self and other) and is used by the > operator.

fn ge(&self, other: &Rhs) -> bool

Tests greater than or equal to (for self and other) and is used by the >= operator.

impl Serialize for ScalarValue

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl Copy for ScalarValue

impl Eq for ScalarValue

impl StructuralPartialEq for ScalarValue