Use swift-macro-testing (#20)

This PR uses swift-macro-testing for easier and manageable macro
testing.

Author: FlickerSoul

Package.resolved

@@ -26,6 +26,7 @@ let package = Package(
             .upToNextMinor(from: "1.1.0"),
         ),
         .package(url: "https://github.com/apple/swift-docc-plugin", from: "1.4.5"),
+        .package(url: "https://github.com/pointfreeco/swift-macro-testing.git", from: "0.6.4"),
     ],
     targets: [
         .macro(
@@ -75,6 +76,7 @@ let package = Package(
             dependencies: [
                 "BinaryParseKitMacros",
                 .product(name: "SwiftSyntaxMacrosTestSupport", package: "swift-syntax"),
+                .product(name: "MacroTesting", package: "swift-macro-testing"),
             ],
         ),
         .testTarget(

Package.swift

@@ -8,11 +8,11 @@ import SwiftDiagnostics
 import SwiftSyntax
 import SwiftSyntaxMacros
 
-class ParseEnumCase<C: MacroExpansionContext>: SyntaxVisitor {
-    private let context: C
+class ParseEnumCase: SyntaxVisitor {
+    private let context: any MacroExpansionContext
 
     private var workEnum: EnumDeclSyntax?
-    private var currentParseMacroVisitor: MacroAttributeCollector<C>?
+    private var currentParseMacroVisitor: MacroAttributeCollector?
     private var currentCaseElements: EnumCaseElementListSyntax?
     private var caseParseInfo: [EnumCaseParseInfo] = []
     private(set) var parsedInfo: EnumParseInfo?
@@ -21,7 +21,7 @@ class ParseEnumCase<C: MacroExpansionContext>: SyntaxVisitor {
 
     private var errors: [Diagnostic] = []
 
-    init(context: C) {
+    init(context: any MacroExpansionContext) {
         self.context = context
         super.init(viewMode: .sourceAccurate)
     }

Sources/BinaryParseKitMacros/Macros/ParseEnum/ParseEnumCase.swift

@@ -11,7 +11,7 @@ import SwiftSyntax
 import SwiftSyntaxBuilder
 import SwiftSyntaxMacros
 
-class ParseStructField<C: MacroExpansionContext>: SyntaxVisitor {
+class ParseStructField: SyntaxVisitor {
     struct VariableInfo {
         let type: TypeSyntax
         let parseActions: [StructParseAction]
@@ -24,17 +24,17 @@ class ParseStructField<C: MacroExpansionContext>: SyntaxVisitor {
 
     typealias ParseVariableMapping = OrderedDictionary<TokenSyntax, VariableInfo>
 
-    private let context: C
+    private let context: any MacroExpansionContext
 
     private var hasParse: Bool = false
-    private var structFieldVisitor: MacroAttributeCollector<C>?
+    private var structFieldVisitor: MacroAttributeCollector?
     private var existParseRestContent: Bool = false
 
     private(set) var variables: ParseVariableMapping = [:]
 
     private(set) var errors: [Diagnostic] = []
 
-    init(context: C) {
+    init(context: any MacroExpansionContext) {
         self.context = context
         super.init(viewMode: .sourceAccurate)
     }

Sources/BinaryParseKitMacros/Macros/ParseStruct/ParseStructField.swift

@@ -9,7 +9,7 @@ import SwiftDiagnostics
 import SwiftSyntax
 import SwiftSyntaxMacros
 
-class MacroAttributeCollector<C: MacroExpansionContext>: SyntaxVisitor {
+class MacroAttributeCollector: SyntaxVisitor {
     private enum MacroError: Error {
         case invalidParseAttribute
         case invalidParseRestAttribute
@@ -20,7 +20,7 @@ class MacroAttributeCollector<C: MacroExpansionContext>: SyntaxVisitor {
     typealias ParseAction = StructParseAction
     typealias CaseMatchAction = EnumCaseMatchAction
 
-    private let context: C
+    private let context: any MacroExpansionContext
     private(set) var parseActions: [ParseAction] = []
     private(set) var hasParseRest: Bool = false
     private(set) var hasParse: Bool = false
@@ -29,7 +29,7 @@ class MacroAttributeCollector<C: MacroExpansionContext>: SyntaxVisitor {
 
     private var errors: [Diagnostic] = []
 
-    init(context: C) {
+    init(context: any MacroExpansionContext) {
         self.context = context
         super.init(viewMode: .sourceAccurate)
     }

Sources/BinaryParseKitMacros/Macros/Supports/MacroAttributeCollector.swift

@@ -10,16 +10,16 @@ import SwiftDiagnostics
 import SwiftSyntax
 import SwiftSyntaxMacros
 
-private class ParseMacroArgVisitor<C: MacroExpansionContext>: SyntaxVisitor {
+private class ParseMacroArgVisitor: SyntaxVisitor {
     var source: Syntax?
     var byteCountOfArgument: LabeledExprSyntax?
     var byteCountArgument: LabeledExprSyntax?
     var endiannessArgument: LabeledExprSyntax?
 
     private var errors: [Diagnostic] = []
 
-    private let context: C
-    init(context: C) {
+    private let context: any MacroExpansionContext
+    init(context: any MacroExpansionContext) {
         self.context = context
         super.init(viewMode: .sourceAccurate)
     }