PrecedenceGroup_Relation

PrecedenceGroup.Relation

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.

public enum Relation

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).

Inheritance

Codable, Comparable, Hashable

Initializers

init(from:​)

public init(from decoder:​ Decoder) throws

init?(_:​)

Creates an instance initialized with the given syntax node.

public init?(_ node:​ PrecedenceGroupRelationSyntax)

Enumeration Cases

higherThan

The precedence group has higher precedence than the associated group names.

case higherThan(:​ [String])

lowerThan

The precedence group has lower precedence than the associated group names.

case lowerThan(:​ [String])

Methods

<(lhs:​rhs:​)

public static func <(lhs:​ PrecedenceGroup.Relation, rhs:​ PrecedenceGroup.Relation) -> Bool

encode(to:​)

public func encode(to encoder:​ Encoder) throws