Relation
public enum Relation : Hashable
extension PrecedenceGroup.Relation: Comparable
extension PrecedenceGroup.Relation: Codable
The relation of operators to operators in other precedence groups, which determines the order in which operators of different precedence groups are evaluated in absence of parentheses.
Consider the expression a ⧓ b ⧗ c
.
If the ⧓
operator has a higher precedence than ⧗
,
then the expression is interpreted as (a ⧓ b) ⧗ c
.
If the ⧓
operator has a lower precedence than ⧗
,
then the expression is interpreted as a ⧓ (b ⧗ c)
.
For example,
Swift mathematical operators have the same inherent precedence
as their corresponding arithmetic operations,
such that 1 + 2 * 3
evaluates to 7
(1 + (2 * 3)
)
rather than 9
((1 + 2) * 3
).
-
The precedence group has higher precedence than the associated group names.
Declaration
Swift
case higherThan([String])
-
The precedence group has lower precedence than the associated group names.
Declaration
Swift
case lowerThan([String])
-
Declaration
Swift
public static func < (lhs: PrecedenceGroup.Relation, rhs: PrecedenceGroup.Relation) -> Bool
-
Declaration
Swift
public init(from decoder: Decoder) throws
-
Declaration
Swift
public func encode(to encoder: Encoder) throws
-
Creates an instance initialized with the given syntax node.
Declaration
Swift
public init?(_ node: PrecedenceGroupRelationSyntax)