wip

Author: stephencelis

Sources/StructuredQueriesCore/Never.swift

@@ -1,4 +1,6 @@
 extension Never: Table {
+  public typealias QueryValue = Never
+
   public struct TableColumns: TableDefinition {
     public typealias QueryValue = Never
 
@@ -11,6 +13,10 @@ extension Never: Table {
 
   public static let tableName = "nevers"
 
+  public var queryFragment: QueryFragment {
+    fatalError()
+  }
+
   public init(decoder: inout some QueryDecoder) throws {
     throw NotDecodable()
   }

Sources/StructuredQueriesCore/Operators.swift

@@ -1,4 +1,4 @@
-extension QueryExpression where QueryValue: QueryBindable {
+extension QueryExpression where QueryValue: _OptionalPromotable {
   /// A predicate expression indicating whether two query expressions are equal.
   ///
   /// ```swift
@@ -963,7 +963,7 @@ struct BinaryOperator<QueryValue>: QueryExpression {
   }
 
   var queryFragment: QueryFragment {
-    "(\(lhs) \(`operator`) \(rhs))"
+    "(\(lhs)) \(`operator`) (\(rhs))"
   }
 }
 

Sources/StructuredQueriesCore/QueryRepresentable.swift

@@ -12,7 +12,7 @@ import Foundation
 /// offsets from the Unix epoch, or double Julian day numbers. This library defaults to ISO-8601
 /// text, but provides ``Foundation/Date/UnixTimeRepresentation`` to represent a date as an integer,
 /// and ``Foundation/Date/JulianDayRepresentation`` to represent a date as a floating point number.
-public protocol QueryRepresentable<QueryOutput>: QueryDecodable {
+public protocol QueryRepresentable<QueryOutput>: QueryDecodable, QueryExpression {
   /// The Swift type this value is ultimately decoded to.
   associatedtype QueryOutput
 

Sources/StructuredQueriesCore/Updates.swift

@@ -8,7 +8,7 @@
 public struct Updates<Base: Table> {
   private var updates: [(String, QueryFragment)] = []
 
-  init(_ body: (inout Self) -> Void) {
+  package init(_ body: (inout Self) -> Void) {
     body(&self)
   }
 
@@ -59,3 +59,12 @@ extension Updates: QueryExpression {
     "SET \(updates.map { "\(quote: $0) = \($1)" }.joined(separator: ", "))"
   }
 }
+
+extension Updates {
+  public subscript<Member: TableDefinition>(
+    dynamicMember keyPath: KeyPath<Base.TableColumns, Member>
+  ) -> Updates<Member.QueryValue> {
+    get { Updates<Member.QueryValue> { _ in } }
+    set { updates.append(contentsOf: newValue.updates) }
+  }
+}