Enum TypeSig 

pub enum TypeSig {
    Any,
    Null,
    Bool,
    Int,
    Float,
    String,
    Bytes,
    List(Box<TypeSig>),
    Map(Box<TypeSig>),
    Named(String),
}

A structural type signature used for port compatibility checking.

Variants

Any

Matches any other TypeSig. Use as a wildcard input or output.

Null

The null / absent type.

Bool

Boolean.

Int

64-bit signed integer.

Float

64-bit floating-point number.

String

UTF-8 string.

Bytes

Raw byte sequence.

List(Box<TypeSig>)

Homogeneous list of elements with the given element type.

Map(Box<TypeSig>)

Map with string keys and values of the given type.

Named(String)

A user-defined named type (e.g. a domain struct name).

Implementations

impl TypeSig

pub fn is_compatible_with(&self, other: &TypeSig) -> bool

Returns true if a value with type signature self can be accepted where other is expected.

Rules:

• Any is compatible with everything (in either position).
• Named(a) is compatible with Named(b) iff a == b.
• List(a) is compatible with List(b) iff a is compatible with b.
• Map(a) is compatible with Map(b) iff a is compatible with b.
• All other variants require exact equality.

Trait Implementations

impl Clone for TypeSig

fn clone(&self) -> TypeSig

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for TypeSig

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for TypeSig

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Display for TypeSig

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

Formats the value using the given formatter.

impl PartialEq for TypeSig

fn eq(&self, other: &TypeSig) -> 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 Serialize for TypeSig

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

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl Eq for TypeSig

impl StructuralPartialEq for TypeSig