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Generator.cs
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Generator.cs
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namespace PCLMock.CodeGeneration
{
using System;
using System.Collections.Generic;
using System.Collections.Immutable;
using System.Linq;
using System.Reflection;
using Logging;
using Microsoft.CodeAnalysis;
using Microsoft.CodeAnalysis.CSharp;
using Microsoft.CodeAnalysis.CSharp.Syntax;
using Microsoft.CodeAnalysis.Editing;
using PCLMock.CodeGeneration.Plugins;
public static class Generator
{
private const string headerComment =
@"-----------------------------------------------------------------------
<autogenerated>
This code was generated from a template.
Changes to this file may cause incorrect behaviour and will be lost
if the code is regenerated.
</autogenerated>
------------------------------------------------------------------------";
public static IImmutableList<SyntaxNode> GenerateMocks(
ILogSink logSink,
Language language,
IImmutableList<Compilation> compilations,
IImmutableList<IPlugin> plugins,
Func<INamedTypeSymbol, bool> interfacePredicate,
Func<INamedTypeSymbol, string> mockNamespaceSelector,
Func<INamedTypeSymbol, string> mockNameSelector)
{
logSink = logSink.WithSource(typeof(Generator));
logSink.Debug("Creating adhoc workspace.");
var workspace = new AdhocWorkspace();
var syntaxGenerator = SyntaxGenerator.GetGenerator(workspace, language.ToSyntaxGeneratorLanguageName());
// The default plugin is always included last.
plugins = plugins.Add(Default.Instance);
return compilations
// Make sure the compilation has a reference to PCLMock, even if the project hosting the code doesn't. That allows us
// to generate the code even if it doesn't end up building due to the missing PCLMock reference.
.Select(compilation => compilation.AddReferences(MetadataReference.CreateFromFile(typeof(MockBase<>).GetTypeInfo().Assembly.Location)))
// Then allow all plugins to tweak the compilation.
.Select(compilation => plugins.Aggregate(compilation, (acc, next) => next.InitializeCompilation(logSink, acc)))
.SelectMany(compilation => GetNamedTypeSymbolsInSource(compilation).Select(namedTypeSymbol => (compilation, namedTypeSymbol)))
.Where(compilationAndSymbol => compilationAndSymbol.namedTypeSymbol.TypeKind == TypeKind.Interface && !compilationAndSymbol.namedTypeSymbol.IsImplicitlyDeclared)
.Where(compilationAndSymbol => interfacePredicate == null || interfacePredicate(compilationAndSymbol.namedTypeSymbol))
.Select(
compilationAndSymbol =>
{
var syntaxTree = compilationAndSymbol
.namedTypeSymbol
.DeclaringSyntaxReferences
.FirstOrDefault()
?.SyntaxTree;
// This is critical for the case of having loaded multiple projects that reference each other. TODO: would be better if GetNamedTypeSymbolsInSource
// only obtained symbols in a given compilation, but that is presenting other issues.
if (!compilationAndSymbol.compilation.ContainsSyntaxTree(syntaxTree))
{
return (compilationAndSymbol.compilation, compilationAndSymbol.namedTypeSymbol, null);
}
var semanticModel = syntaxTree == null ? null : compilationAndSymbol.compilation.GetSemanticModel(syntaxTree);
if (semanticModel == null)
{
logSink.Warn(
"Cannot generate mock for included interface '{0}' because no semantic model could be obtained for it.",
compilationAndSymbol.namedTypeSymbol);
}
return (compilationAndSymbol.compilation, compilationAndSymbol.namedTypeSymbol, semanticModel);
})
.Where(info => info.semanticModel != null)
.Select(
info =>
{
var @namespace = mockNamespaceSelector(info.namedTypeSymbol);
var name = mockNameSelector(info.namedTypeSymbol);
logSink.Info(
"Generating mock for interface '{0}' with namespace '{1}', name '{2}'.",
info.namedTypeSymbol,
@namespace,
name);
var context = new Context(logSink, language, plugins, syntaxGenerator, info.semanticModel);
return GenerateMock(context, info.namedTypeSymbol, @namespace, name, plugins);
})
.Select((syntaxNode, i) => i == 0 ? syntaxGenerator.WithLeadingComments(syntaxNode, headerComment, language) : syntaxNode)
.ToImmutableList();
}
private static SyntaxNode GenerateMock(
Context context,
INamedTypeSymbol interfaceSymbol,
string mockNamespace,
string mockName,
IImmutableList<IPlugin> plugins)
{
var namespaceSyntax = GetNamespaceDeclarationSyntax(context, mockNamespace);
var classSyntax = GetClassDeclarationSyntax(context, mockName, interfaceSymbol);
classSyntax = context
.SyntaxGenerator
.AddAttributes(classSyntax, GetClassAttributesSyntax(context));
classSyntax = context
.SyntaxGenerator
.AddMembers(classSyntax, GetMemberDeclarations(context, mockName, interfaceSymbol, plugins));
namespaceSyntax = context
.SyntaxGenerator
.AddMembers(namespaceSyntax, classSyntax);
return context
.SyntaxGenerator
.CompilationUnit(namespaceSyntax)
.NormalizeWhitespace();
}
private static SyntaxNode GetNamespaceDeclarationSyntax(
Context context,
string @namespace)
{
return context
.SyntaxGenerator
.NamespaceDeclaration(@namespace);
}
private static SyntaxNode GetClassDeclarationSyntax(
Context context,
string name,
INamedTypeSymbol interfaceSymbol)
{
var interfaceType = context
.SyntaxGenerator
.TypeExpression(interfaceSymbol);
var mockBaseType = context
.SemanticModel
.Compilation
.GetTypeByMetadataName("PCLMock.MockBase`1");
if (mockBaseType == null)
{
throw new InvalidOperationException("Failed to find type in PCLMock assembly. Are you sure this project has a reference to PCLMock?");
}
var baseType = context
.SyntaxGenerator
.TypeExpression(
mockBaseType
.Construct(interfaceSymbol));
var accessibility = interfaceSymbol.DeclaredAccessibility == Accessibility.NotApplicable
? Accessibility.Public
: interfaceSymbol.DeclaredAccessibility;
var classDeclaration = context
.SyntaxGenerator
.ClassDeclaration(
name,
accessibility: accessibility,
modifiers: DeclarationModifiers.Partial,
typeParameters: interfaceSymbol.TypeParameters.Select(x => x.Name),
baseType: baseType,
interfaceTypes: new[] { interfaceType });
// TODO: tidy this up once this issue is rectified: https://github.com/dotnet/roslyn/issues/1658
foreach (var typeParameter in interfaceSymbol.TypeParameters)
{
if (typeParameter.HasConstructorConstraint ||
typeParameter.HasReferenceTypeConstraint ||
typeParameter.HasValueTypeConstraint ||
typeParameter.ConstraintTypes.Length > 0)
{
var kinds = (typeParameter.HasConstructorConstraint ? SpecialTypeConstraintKind.Constructor : SpecialTypeConstraintKind.None) |
(typeParameter.HasReferenceTypeConstraint ? SpecialTypeConstraintKind.ReferenceType : SpecialTypeConstraintKind.None) |
(typeParameter.HasValueTypeConstraint ? SpecialTypeConstraintKind.ValueType : SpecialTypeConstraintKind.None);
classDeclaration = context
.SyntaxGenerator
.WithTypeConstraint(
classDeclaration,
typeParameter.Name,
kinds: kinds,
types: typeParameter.ConstraintTypes.Select(t => context.SyntaxGenerator.TypeExpression(t)));
}
}
return classDeclaration;
}
private static IEnumerable<SyntaxNode> GetClassAttributesSyntax(
Context context)
{
// GENERATED CODE:
//
// [System.CodeDom.Compiler.GeneratedCode("PCLMock", "[version]")]
// [System.Runtime.CompilerServices.CompilerGenerated)]
yield return context
.SyntaxGenerator
.Attribute(
"System.CodeDom.Compiler.GeneratedCode",
context
.SyntaxGenerator
.LiteralExpression("PCLMock"),
context
.SyntaxGenerator
.LiteralExpression(typeof(MockBase<>).GetTypeInfo().Assembly.GetName().Version.ToString()));
yield return context
.SyntaxGenerator
.Attribute(
"System.Runtime.CompilerServices.CompilerGenerated");
}
private static SyntaxNode GetConstructorDeclarationSyntax(
Context context,
string name)
{
// GENERATED CODE:
//
// public Name(MockBehavior behavior = MockBehavior.Strict)
// : base(behavior)
// {
// ConfigureBehaviorGenerated();
// ConfigureBehavior();
//
// if (behavior == MockBehavior.Loose)
// {
// ConfigureLooseBehavior();
// }
// }
var mockBehaviorType = context
.SyntaxGenerator
.TypeExpression(
context
.SemanticModel
.Compilation
.GetTypeByMetadataName("PCLMock.MockBehavior"));
return context
.SyntaxGenerator
.ConstructorDeclaration(
name,
parameters: new[]
{
context
.SyntaxGenerator
.ParameterDeclaration(
"behavior",
mockBehaviorType,
initializer: context.SyntaxGenerator.MemberAccessExpression(mockBehaviorType, "Strict"))
},
accessibility: Accessibility.Public,
baseConstructorArguments: new[] { context.SyntaxGenerator.IdentifierName("behavior") },
statements: new[]
{
context
.SyntaxGenerator
.InvocationExpression(
context
.SyntaxGenerator
.IdentifierName("ConfigureBehaviorGenerated")),
context
.SyntaxGenerator
.InvocationExpression(
context
.SyntaxGenerator
.IdentifierName("ConfigureBehavior")),
context
.SyntaxGenerator
.IfStatement(
context
.SyntaxGenerator
.ValueEqualsExpression(
context
.SyntaxGenerator
.IdentifierName("behavior"),
context
.SyntaxGenerator
.MemberAccessExpression(mockBehaviorType, "Loose")),
new[]
{
context
.SyntaxGenerator
.InvocationExpression(
context
.SyntaxGenerator
.IdentifierName("ConfigureLooseBehavior"))
})
});
}
private static SyntaxNode GetConfigureBehaviorGeneratedForSymbol(
Context context,
INamedTypeSymbol interfaceSymbol,
ISymbol symbol,
IImmutableList<IPlugin> plugins,
bool isExplicitRequired)
{
context
.LogSink
.Debug("Considering symbol '{0}' for generation of configure behavior.", symbol);
var propertySymbol = symbol as IPropertySymbol;
var methodSymbol = symbol as IMethodSymbol;
ITypeSymbol returnType = null;
if (propertySymbol != null)
{
if (propertySymbol.GetMethod == null)
{
context
.LogSink
.Debug("Ignoring symbol '{0}' because it is a write-only property.", symbol);
return null;
}
returnType = propertySymbol.GetMethod.ReturnType as INamedTypeSymbol;
}
else if (methodSymbol != null)
{
if (methodSymbol.AssociatedSymbol != null)
{
context
.LogSink
.Debug("Ignoring symbol '{0}' because it is a method with an associated symbol ('{1}').", symbol, methodSymbol.AssociatedSymbol);
return null;
}
if (methodSymbol.IsGenericMethod)
{
context
.LogSink
.Debug("Ignoring symbol '{0}' because it is a generic method.", symbol);
return null;
}
returnType = methodSymbol.ReturnType as INamedTypeSymbol;
}
else
{
context
.LogSink
.Debug("Ignoring symbol '{0}' because it is neither a property nor a method.", symbol);
return null;
}
if (returnType == null)
{
context
.LogSink
.Debug("Ignoring symbol '{0}' because its return type could not be determined (it's probably a generic).", symbol);
return null;
}
var defaultValueSyntax = plugins
.Select(plugin => plugin.GetDefaultValueSyntax(context, symbol, returnType))
.Where(syntax => syntax != null)
.FirstOrDefault();
if (defaultValueSyntax == null)
{
return null;
}
var itType = context
.SemanticModel
.Compilation
.GetTypeByMetadataName("PCLMock.It");
if (itType == null)
{
context
.LogSink
.Error("Failed to resolve It class.");
return null;
}
var isAnyMethod = itType
.GetMembers("IsAny")
.Single();
if (isAnyMethod == null)
{
context
.LogSink
.Error("Failed to resolve IsAny method.");
return null;
}
var lambdaParameterName = symbol.GetUniqueName();
SyntaxNode lambdaExpression;
if (propertySymbol != null)
{
if (!propertySymbol.IsIndexer)
{
// GENERATED CODE:
//
// this
// .When(x => x.SymbolName)
lambdaExpression = context
.SyntaxGenerator
.MemberAccessExpression(
context
.SyntaxGenerator
.IdentifierName(lambdaParameterName),
propertySymbol.Name);
}
else
{
// GENERATED CODE:
//
// this
// .When(x => x[It.IsAny<P1>(), It.IsAny<P2>() ...)
var whenArguments = propertySymbol
.Parameters
.Select(
parameter =>
context
.SyntaxGenerator
.InvocationExpression(
context
.SyntaxGenerator
.MemberAccessExpression(
context
.SyntaxGenerator
.TypeExpression(itType),
context
.SyntaxGenerator
.GenericName(
"IsAny",
typeArguments: new[]
{
parameter.Type
}))));
lambdaExpression = context
.SyntaxGenerator
.ElementAccessExpression(
context
.SyntaxGenerator
.IdentifierName(lambdaParameterName),
arguments: whenArguments);
}
}
else
{
// GENERATED CODE:
//
// this
// .When(x => x.SymbolName(It.IsAny<P1>(), It.IsAny<P2>() ...)
//
// OR (FOR EXPLICIT):
//
// this
// .When(x => ((TypeContainingSymbol)x).SymbolName(It.IsAny<P1>(), It.IsAny<P2>() ...)
var whenArguments = methodSymbol
.Parameters
.Select(
parameter =>
context
.SyntaxGenerator
.InvocationExpression(
context
.SyntaxGenerator
.MemberAccessExpression(
context
.SyntaxGenerator
.TypeExpression(itType),
context
.SyntaxGenerator
.GenericName(
"IsAny",
typeArguments: new[]
{
parameter.Type
}))));
var memberToAccess = context
.SyntaxGenerator
.IdentifierName(lambdaParameterName);
if (isExplicitRequired)
{
memberToAccess = context
.SyntaxGenerator
.CastExpression(
context
.SyntaxGenerator
.TypeExpression(methodSymbol.ContainingType),
memberToAccess);
}
lambdaExpression = context
.SyntaxGenerator
.InvocationExpression(
context
.SyntaxGenerator
.MemberAccessExpression(
memberToAccess,
methodSymbol.Name),
arguments: whenArguments);
}
var whenLambdaArgument = context
.SyntaxGenerator
.ValueReturningLambdaExpression(
lambdaParameterName,
lambdaExpression);
var whenInvocation = context
.SyntaxGenerator
.InvocationExpression(
context
.SyntaxGenerator
.MemberAccessExpression(
context
.SyntaxGenerator
.ThisExpression(),
context
.SyntaxGenerator
.IdentifierName("When")),
whenLambdaArgument);
var result = context
.SyntaxGenerator
.ExpressionStatement(
context
.SyntaxGenerator
.InvocationExpression(
context
.SyntaxGenerator
.MemberAccessExpression(
whenInvocation,
context
.SyntaxGenerator
.IdentifierName("Return")),
arguments: new[]
{
defaultValueSyntax
}));
return result;
}
private static SyntaxNode GetConfigureBehaviorMethodSyntax(
Context context)
{
// GENERATED CODE:
//
// partial void ConfigureBehavior();
return context
.SyntaxGenerator
.MethodDeclaration(
"ConfigureBehavior",
accessibility: context.Language == Language.VisualBasic ? Accessibility.Private : Accessibility.NotApplicable,
modifiers: DeclarationModifiers.Partial);
}
private static SyntaxNode GetConfigureLooseBehaviorMethodSyntax(
Context context)
{
// GENERATED CODE:
//
// partial void ConfigureLooseBehavior();
return context
.SyntaxGenerator
.MethodDeclaration(
"ConfigureLooseBehavior",
accessibility: context.Language == Language.VisualBasic ? Accessibility.Private : Accessibility.NotApplicable,
modifiers: DeclarationModifiers.Partial);
}
private static IEnumerable<SyntaxNode> GetMemberDeclarations(
Context context,
string name,
INamedTypeSymbol interfaceSymbol,
IImmutableList<IPlugin> plugins)
{
var members = GetDistinctMembersRecursive(interfaceSymbol, context.LogSink)
.ToList();
// All members with a flag indicating whether explicit implementation is required.
var membersWithExplicitFlag = members
.Select((member, index) =>
{
// Explicit implementation is required if any prior member has the same name and parameters as this one.
var isExplicitRequired = members
.Take(index)
.Any(symbol => ExplicitImplementationRequiredComparer.Instance.Equals(symbol, member));
return (member, isExplicitRequired);
})
.ToList();
var interfaceTypeExpression = context.SyntaxGenerator.TypeExpression(interfaceSymbol);
var configureBehaviorStatements = membersWithExplicitFlag
.Select(x => GetConfigureBehaviorGeneratedForSymbol(context, interfaceSymbol, x.member, plugins, x.isExplicitRequired))
.Where(syntaxNode => syntaxNode != null)
.ToImmutableList();
var configureBehaviorMethod = context
.SyntaxGenerator
.MethodDeclaration(
"ConfigureBehaviorGenerated",
accessibility: Accessibility.Private,
statements: configureBehaviorStatements);
var memberDeclarations = membersWithExplicitFlag
.Select(
x =>
{
var memberDeclaration = GetMemberDeclarationSyntax(context, x.member, x.isExplicitRequired);
if (memberDeclaration == null)
{
return null;
}
var typeContainingMember = context
.SyntaxGenerator
.TypeExpression(x.member.ContainingType);
if (x.isExplicitRequired)
{
return context
.SyntaxGenerator
.AsPrivateInterfaceImplementation(memberDeclaration, typeContainingMember);
}
else
{
return context
.SyntaxGenerator
.AsPublicInterfaceImplementation(memberDeclaration, typeContainingMember);
}
})
.Where(x => x != null);
return
new SyntaxNode[]
{
GetConstructorDeclarationSyntax(context, name),
configureBehaviorMethod,
GetConfigureBehaviorMethodSyntax(context),
GetConfigureLooseBehaviorMethodSyntax(context)
}
.Concat(memberDeclarations);
}
private static IEnumerable<ISymbol> GetMembersRecursive(INamedTypeSymbol interfaceSymbol, ILogSink logSink)
{
foreach (var member in interfaceSymbol.GetMembers())
{
yield return member;
}
foreach (var implementedInterface in interfaceSymbol.Interfaces)
{
foreach (var member in GetMembersRecursive(implementedInterface, logSink))
{
yield return member;
}
}
}
private static IEnumerable<ISymbol> GetDistinctMembersRecursive(INamedTypeSymbol interfaceSymbol, ILogSink logSink) =>
GetMembersRecursive(interfaceSymbol, logSink)
.Distinct(SymbolEqualityComparer.Default);
private static SyntaxNode GetMemberDeclarationSyntax(
Context context,
ISymbol symbol,
bool isExplicitRequired)
{
var propertySymbol = symbol as IPropertySymbol;
if (propertySymbol != null)
{
return GetPropertyDeclarationSyntax(context, propertySymbol);
}
var methodSymbol = symbol as IMethodSymbol;
if (methodSymbol != null)
{
return GetMethodDeclarationSyntax(context, methodSymbol, isExplicitRequired);
}
// unsupported symbol type, but we don't error - the user can supplement our code as necessary because it's a partial class
return null;
}
private static SyntaxNode GetPropertyDeclarationSyntax(
Context context,
IPropertySymbol propertySymbol)
{
var getAccessorStatements = GetPropertyGetAccessorsSyntax(context, propertySymbol).ToList();
var setAccessorStatements = GetPropertySetAccessorsSyntax(context, propertySymbol).ToList();
var declarationModifiers = DeclarationModifiers.None;
if (getAccessorStatements.Count == 0)
{
declarationModifiers = declarationModifiers.WithIsWriteOnly(true);
// set-only properties are not currently supported
return null;
}
if (setAccessorStatements.Count == 0)
{
declarationModifiers = declarationModifiers.WithIsReadOnly(true);
}
if (!propertySymbol.IsIndexer)
{
return context
.SyntaxGenerator
.PropertyDeclaration(
propertySymbol.Name,
context
.SyntaxGenerator
.TypeExpression(propertySymbol.Type),
accessibility: Accessibility.Public,
modifiers: declarationModifiers,
getAccessorStatements: getAccessorStatements,
setAccessorStatements: setAccessorStatements);
}
else
{
var parameters = propertySymbol
.Parameters
.Select(x => context.SyntaxGenerator.ParameterDeclaration(x.Name, context.SyntaxGenerator.TypeExpression(x.Type)))
.ToList();
return context
.SyntaxGenerator
.IndexerDeclaration(
parameters,
context.SyntaxGenerator.TypeExpression(propertySymbol.Type),
accessibility: Accessibility.Public,
modifiers: declarationModifiers,
getAccessorStatements: getAccessorStatements,
setAccessorStatements: setAccessorStatements);
}
}
private static IEnumerable<SyntaxNode> GetPropertyGetAccessorsSyntax(
Context context,
IPropertySymbol propertySymbol)
{
if (propertySymbol.GetMethod == null)
{
yield break;
}
var lambdaParameterName = propertySymbol.GetUniqueName();
if (!propertySymbol.IsIndexer)
{
// GENERATED CODE:
//
// return this.Apply(x => x.PropertyName);
yield return context
.SyntaxGenerator
.ReturnStatement(
context
.SyntaxGenerator
.InvocationExpression(
context
.SyntaxGenerator
.MemberAccessExpression(
context
.SyntaxGenerator
.ThisExpression(),
"Apply"),
context
.SyntaxGenerator
.ValueReturningLambdaExpression(
lambdaParameterName,
context
.SyntaxGenerator
.MemberAccessExpression(
context
.SyntaxGenerator
.IdentifierName(lambdaParameterName),
context
.SyntaxGenerator
.IdentifierName(propertySymbol.Name)))));
}
else
{
// GENERATED CODE:
//
// return this.Apply(x => x[first, second]);
var arguments = propertySymbol
.Parameters
.Select(x => context.SyntaxGenerator.Argument(context.SyntaxGenerator.IdentifierName(x.Name)))
.ToList();
yield return context
.SyntaxGenerator
.ReturnStatement(
context
.SyntaxGenerator
.InvocationExpression(
context
.SyntaxGenerator
.MemberAccessExpression(
context
.SyntaxGenerator
.ThisExpression(),
"Apply"),
context
.SyntaxGenerator
.ValueReturningLambdaExpression(
lambdaParameterName,
context
.SyntaxGenerator
.ElementAccessExpression(
context
.SyntaxGenerator
.IdentifierName(lambdaParameterName),
arguments))));
}
}
private static IEnumerable<SyntaxNode> GetPropertySetAccessorsSyntax(
Context context,
IPropertySymbol propertySymbol)
{
if (propertySymbol.SetMethod == null)
{
yield break;
}
var lambdaParameterName = propertySymbol.GetUniqueName();
if (!propertySymbol.IsIndexer)
{
// GENERATED CODE:
//
// this.ApplyPropertySet(x => x.PropertyName, value);
yield return context
.SyntaxGenerator
.InvocationExpression(
context
.SyntaxGenerator
.MemberAccessExpression(
context
.SyntaxGenerator
.ThisExpression(),
"ApplyPropertySet"),
context
.SyntaxGenerator
.ValueReturningLambdaExpression(
lambdaParameterName,
context
.SyntaxGenerator
.MemberAccessExpression(
context
.SyntaxGenerator
.IdentifierName(lambdaParameterName),
context
.SyntaxGenerator
.IdentifierName(propertySymbol.Name))),
context
.SyntaxGenerator
.IdentifierName("value"));
}
else
{
// GENERATED CODE:
//
// this.ApplyPropertySet(x => x[first, second], value);
var arguments = propertySymbol
.Parameters
.Select(x => context.SyntaxGenerator.Argument(context.SyntaxGenerator.IdentifierName(x.Name)))
.ToList();
yield return context
.SyntaxGenerator
.InvocationExpression(
context
.SyntaxGenerator
.MemberAccessExpression(
context
.SyntaxGenerator
.ThisExpression(),
"ApplyPropertySet"),
context
.SyntaxGenerator
.ValueReturningLambdaExpression(
lambdaParameterName,
context
.SyntaxGenerator
.ElementAccessExpression(
context
.SyntaxGenerator
.IdentifierName(lambdaParameterName),
arguments)),
context
.SyntaxGenerator
.IdentifierName("value"));
}
}
private static SyntaxNode GetMethodDeclarationSyntax(
Context context,
IMethodSymbol methodSymbol,
bool isExplicitRequired)
{
if (methodSymbol.MethodKind != MethodKind.Ordinary)
{
return null;
}
var methodDeclaration = context
.SyntaxGenerator
.MethodDeclaration(methodSymbol);
methodDeclaration = context
.SyntaxGenerator
.WithModifiers(
methodDeclaration,
context
.SyntaxGenerator
.GetModifiers(methodDeclaration)
.WithIsAbstract(false));
methodDeclaration = context
.SyntaxGenerator
.WithStatements(
methodDeclaration,
GetMethodStatementsSyntax(context, methodSymbol, isExplicitRequired));
var csharpMethodDeclaration = methodDeclaration as MethodDeclarationSyntax;
if (csharpMethodDeclaration != null)
{
// remove trailing semi-colon from the declaration
methodDeclaration = csharpMethodDeclaration.WithSemicolonToken(SyntaxFactory.Token(SyntaxKind.None));
}
return methodDeclaration;
}
private static IEnumerable<SyntaxNode> GetMethodStatementsSyntax(
Context context,
IMethodSymbol methodSymbol,
bool isExplicitRequired)
{
// GENERATED CODE (for every ref or out parameter):
//
// string someOutParameter;
// var someRefParameter = default(int);
for (var i = 0; i < methodSymbol.Parameters.Length; ++i)
{
var parameter = methodSymbol.Parameters[i];
if (parameter.RefKind == RefKind.Out)
{
yield return context
.SyntaxGenerator
.LocalDeclarationStatement(
context
.SyntaxGenerator
.TypeExpression(parameter.Type),
methodSymbol.GetNameForParameter(parameter));
}
else if (parameter.RefKind == RefKind.Ref)
{
yield return context
.SyntaxGenerator
.LocalDeclarationStatement(
methodSymbol.GetNameForParameter(parameter),
initializer: context.SyntaxGenerator.DefaultExpression(context.SyntaxGenerator.TypeExpression(parameter.Type)));
}
}
var arguments = methodSymbol
.Parameters
.Select(x =>
context
.SyntaxGenerator
.Argument(
x.RefKind,
context
.SyntaxGenerator
.IdentifierName(methodSymbol.GetNameForParameter(x))))
.ToList();
var typeArguments = methodSymbol
.TypeArguments
.Select(x => context.SyntaxGenerator.TypeExpression(x))