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Merge pull request #1 from Ryu0118/feature/dependency-value-macro
add DependencyValue Macro
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110 changes: 110 additions & 0 deletions
110
Sources/DependenciesMacroPlugin/DependencyValueMacroDiagnostic.swift
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,110 @@ | ||
| import SwiftSyntax | ||
| import SwiftSyntaxMacros | ||
| import SwiftDiagnostics | ||
|
|
||
| public enum DependencyValuesMacroDiagnostic { | ||
| case notExtension | ||
| case notDependencyValues | ||
| case invalidArgument | ||
| } | ||
|
|
||
| extension DependencyValuesMacroDiagnostic: DiagnosticMessage { | ||
| func diagnose(at node: some SyntaxProtocol) -> Diagnostic { | ||
| Diagnostic(node: Syntax(node), message: self) | ||
| } | ||
|
|
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| public var message: String { | ||
| switch self { | ||
| case .notExtension: | ||
| "DependencyValue Macro can only be applied to extension." | ||
|
|
||
| case .invalidArgument: | ||
| "Invalid argument." | ||
|
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| case .notDependencyValues: | ||
| "DependencyValue Macro can only be applied to extension of DependencyValues" | ||
| } | ||
| } | ||
|
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| public var severity: DiagnosticSeverity { .error } | ||
|
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| public var diagnosticID: MessageID { | ||
| switch self { | ||
| case .notExtension: | ||
| MessageID(domain: "DependencyValuesMacroDiagnostic", id: "notExtension") | ||
|
|
||
| case .invalidArgument: | ||
| MessageID(domain: "DependencyValuesMacroDiagnostic", id: "invalidArgument") | ||
|
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| case .notDependencyValues: | ||
| MessageID(domain: "DependencyValuesMacroDiagnostic", id: "invalidArgument") | ||
| } | ||
| } | ||
| } | ||
|
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| public extension DependencyValuesMacro { | ||
| static func decodeExpansion( | ||
| of syntax: AttributeSyntax, | ||
| attachedTo declaration: some DeclGroupSyntax, | ||
| in context: some MacroExpansionContext | ||
| ) throws -> (decl: ExtensionDeclSyntax, type: String) { | ||
| guard let extensionDecl = declaration.as(ExtensionDeclSyntax.self) else { | ||
| if let actorDecl = declaration.as(ActorDeclSyntax.self) { | ||
| throw DiagnosticsError( | ||
| diagnostics: [ | ||
| DependencyValuesMacroDiagnostic.notExtension.diagnose(at: actorDecl.actorKeyword) | ||
| ] | ||
| ) | ||
| } | ||
| else if let classDecl = declaration.as(ClassDeclSyntax.self) { | ||
| throw DiagnosticsError( | ||
| diagnostics: [ | ||
| DependencyValuesMacroDiagnostic.notExtension.diagnose(at: classDecl.classKeyword) | ||
| ] | ||
| ) | ||
| } | ||
| else if let enumDecl = declaration.as(EnumDeclSyntax.self) { | ||
| throw DiagnosticsError( | ||
| diagnostics: [ | ||
| DependencyValuesMacroDiagnostic.notExtension.diagnose(at: enumDecl.enumKeyword) | ||
| ] | ||
| ) | ||
| } | ||
| else if let structDecl = declaration.as(StructDeclSyntax.self) { | ||
| throw DiagnosticsError( | ||
| diagnostics: [ | ||
| DependencyValuesMacroDiagnostic.notExtension.diagnose(at: structDecl.structKeyword) | ||
| ] | ||
| ) | ||
| } | ||
| else { | ||
| throw DiagnosticsError( | ||
| diagnostics: [ | ||
| DependencyValuesMacroDiagnostic.notExtension.diagnose(at: declaration) | ||
| ] | ||
| ) | ||
| } | ||
| } | ||
|
|
||
| guard extensionDecl.extendedType.as(IdentifierTypeSyntax.self)?.name.text == "DependencyValues" else { | ||
| throw DiagnosticsError( | ||
| diagnostics: [ | ||
| DependencyValuesMacroDiagnostic.notDependencyValues.diagnose(at: extensionDecl.extendedType) | ||
| ] | ||
| ) | ||
| } | ||
|
|
||
| guard case .argumentList(let arguments) = syntax.arguments, | ||
| let type = arguments.first?.expression.as(MemberAccessExprSyntax.self)?.base?.as(DeclReferenceExprSyntax.self)?.baseName.text, | ||
| arguments.count == 1 | ||
| else { | ||
| throw DiagnosticsError( | ||
| diagnostics: [ | ||
| DependencyValuesMacroDiagnostic.invalidArgument.diagnose(at: declaration) | ||
| ] | ||
| ) | ||
| } | ||
|
|
||
| return (extensionDecl, type) | ||
| } | ||
| } |
38 changes: 38 additions & 0 deletions
38
Sources/DependenciesMacroPlugin/DependencyValuesMacro.swift
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,38 @@ | ||
| import SwiftSyntax | ||
| import SwiftSyntaxBuilder | ||
| import SwiftSyntaxMacros | ||
| import SwiftDiagnostics | ||
| import SwiftCompilerPluginMessageHandling | ||
|
|
||
| public struct DependencyValuesMacro: MemberMacro { | ||
| public static func expansion( | ||
| of node: AttributeSyntax, | ||
| providingMembersOf declaration: some DeclGroupSyntax, | ||
| in context: some MacroExpansionContext | ||
| ) throws -> [DeclSyntax] { | ||
| let (_, typeName) = try decodeExpansion( | ||
| of: node, | ||
| attachedTo: declaration, | ||
| in: context | ||
| ) | ||
|
|
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| let variableName = typeName.initialLowerCased() | ||
|
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| return [ | ||
| DeclSyntax( | ||
| """ | ||
| var \(raw: variableName): \(raw: typeName) { | ||
| get { self[\(raw: typeName).self] } | ||
| set { self[\(raw: typeName).self] = newValue } | ||
| } | ||
| """ | ||
| ) | ||
| ] | ||
| } | ||
| } | ||
|
|
||
| extension String { | ||
| func initialLowerCased() -> String { | ||
| return prefix(1).lowercased() + dropFirst() | ||
| } | ||
| } |
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108 changes: 108 additions & 0 deletions
108
Tests/DependenciesMacroTests/DependencyValueMacroTests.swift
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,108 @@ | ||
| import DependenciesMacro | ||
| import DependenciesMacroPlugin | ||
| import MacroTesting | ||
| import XCTest | ||
|
|
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| final class DependencyValueMacroTests: XCTestCase { | ||
| override func invokeTest() { | ||
| withMacroTesting( | ||
| macros: ["DependencyValue": DependencyValuesMacro.self] | ||
| ) { | ||
| super.invokeTest() | ||
| } | ||
| } | ||
|
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| func testDiagnostic() { | ||
| assertMacro { | ||
| """ | ||
| @DependencyValue(TestClient.self) | ||
| public struct DependencyValues {} | ||
| """ | ||
| } matches: { | ||
| """ | ||
| @DependencyValue(TestClient.self) | ||
| public struct DependencyValues {} | ||
| ┬───── | ||
| ╰─ 🛑 DependencyValue Macro can only be applied to extension. | ||
| """ | ||
| } | ||
|
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| assertMacro { | ||
| """ | ||
| @DependencyValue(TestClient.self) | ||
| public class DependencyValues {} | ||
| """ | ||
| } matches: { | ||
| """ | ||
| @DependencyValue(TestClient.self) | ||
| public class DependencyValues {} | ||
| ┬──── | ||
| ╰─ 🛑 DependencyValue Macro can only be applied to extension. | ||
| """ | ||
| } | ||
|
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||
| assertMacro { | ||
| """ | ||
| @DependencyValue(TestClient.self) | ||
| public actor DependencyValues {} | ||
| """ | ||
| } matches: { | ||
| """ | ||
| @DependencyValue(TestClient.self) | ||
| public actor DependencyValues {} | ||
| ┬──── | ||
| ╰─ 🛑 DependencyValue Macro can only be applied to extension. | ||
| """ | ||
| } | ||
|
|
||
| assertMacro { | ||
| """ | ||
| @DependencyValue(TestClient.self) | ||
| public enum DependencyValues {} | ||
| """ | ||
| } matches: { | ||
| """ | ||
| @DependencyValue(TestClient.self) | ||
| public enum DependencyValues {} | ||
| ┬─── | ||
| ╰─ 🛑 DependencyValue Macro can only be applied to extension. | ||
| """ | ||
| } | ||
|
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||
| assertMacro { | ||
| """ | ||
| @DependencyValue(TestClient.self) | ||
| public extension Test {} | ||
| """ | ||
| } matches: { | ||
| """ | ||
| @DependencyValue(TestClient.self) | ||
| public extension Test {} | ||
| ┬─── | ||
| ╰─ 🛑 DependencyValue Macro can only be applied to extension of DependencyValues | ||
| """ | ||
| } | ||
| } | ||
|
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| func testMacro() { | ||
| assertMacro { | ||
| """ | ||
| @DependencyValue(TestClient.self) | ||
| public extension DependencyValues {} | ||
| """ | ||
| } matches: { | ||
| """ | ||
| public extension DependencyValues { | ||
| var testClient: TestClient { | ||
| get { | ||
| self [TestClient.self] | ||
| } | ||
| set { | ||
| self [TestClient.self] = newValue | ||
| } | ||
| }} | ||
| """ | ||
| } | ||
| } | ||
| } |