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1561 lines (1371 loc) · 68.5 KB
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/*
Copyright 2017 YANG Huan ([email protected]).
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
using System;
using System.Collections.Generic;
using System.Diagnostics.Contracts;
using System.Linq;
using System.Text;
using Microsoft.CodeAnalysis.CSharp;
using Microsoft.CodeAnalysis.CSharp.Syntax;
using Microsoft.CodeAnalysis;
using CSharpLua.LuaAst;
namespace CSharpLua {
public sealed partial class LuaSyntaxNodeTransform {
private readonly Stack<LuaIdentifierNameSyntax> conditionalTemps_ = new();
private LuaExpressionSyntax GetObjectCreationExpression(IMethodSymbol symbol, BaseObjectCreationExpressionSyntax node) {
LuaExpressionSyntax creationExpression;
var expression = GetTypeName(symbol.ContainingType);
var invokeExpression = BuildObjectCreationInvocation(symbol, expression);
if (node.ArgumentList != null) {
var refOrOutArguments = new List<RefOrOutArgument>();
var arguments = BuildArgumentList(symbol, symbol.Parameters, node.ArgumentList, refOrOutArguments);
TryRemoveNilArgumentsAtTail(symbol, arguments);
invokeExpression.AddArguments(arguments);
creationExpression = refOrOutArguments.Count > 0
? BuildInvokeRefOrOut(node, invokeExpression, refOrOutArguments)
: invokeExpression;
} else {
creationExpression = invokeExpression;
}
return creationExpression;
}
private LuaExpressionSyntax GetObjectCreationInitializer(LuaExpressionSyntax creationExpression, InitializerExpressionSyntax initializer, ExpressionSyntax node) {
int prevTempCount = CurFunction.TempCount;
int prevReleaseCount = CurBlock.ReleaseCount;
var temp = GetTempIdentifier();
CurBlock.AddStatement(new LuaLocalVariableDeclaratorSyntax(temp, creationExpression));
FillObjectInitializerExpression(temp, initializer);
var grandparent = initializer!.Parent!.Parent;
if (grandparent != null) {
switch (grandparent.Kind()) {
case SyntaxKind.Argument:
case SyntaxKind.ArrayInitializerExpression:
break;
default:
ReleaseTempIdentifiers(prevTempCount, prevReleaseCount);
break;
}
}
return !node.Parent.IsKind(SyntaxKind.ExpressionStatement) ? temp : LuaExpressionSyntax.EmptyExpression;
}
private LuaExpressionSyntax GetObjectCreationInitializer(LuaExpressionSyntax creationExpression, BaseObjectCreationExpressionSyntax node) {
if (node.Initializer == null) {
return creationExpression;
}
return GetObjectCreationInitializer(creationExpression, node.Initializer, node);
}
public override LuaSyntaxNode VisitObjectCreationExpression(ObjectCreationExpressionSyntax node) {
var constExpression = GetConstExpression(node);
if (constExpression != null) {
return constExpression;
}
var symbol = (IMethodSymbol)semanticModel_.GetSymbolInfo(node).Symbol;
LuaExpressionSyntax creationExpression;
if (symbol != null) {
string codeTemplate = XmlMetaProvider.GetMethodCodeTemplate(symbol);
if (codeTemplate != null) {
creationExpression = BuildCodeTemplateExpression(codeTemplate, node, FillCodeTemplateInvocationArguments(symbol, node.ArgumentList, null), symbol.TypeArguments);
} else if (node.Type.IsKind(SyntaxKind.NullableType)) {
Contract.Assert(node.ArgumentList!.Arguments.Count == 1);
var argument = node.ArgumentList.Arguments.First();
return argument.Expression.Accept(this);
} else if (symbol.ContainingType.IsTupleType) {
var expressions = node.ArgumentList!.Arguments.Select(i => i.Expression.AcceptExpression(this));
creationExpression = BuildValueTupleCreateExpression(expressions);
} else {
creationExpression = GetObjectCreationExpression(symbol, node);
}
} else {
var type = semanticModel_.GetSymbolInfo(node.Type).Symbol;
if (type?.Kind == SymbolKind.NamedType) {
var nameType = (INamedTypeSymbol)type;
if (nameType.IsDelegateType()) {
Contract.Assert(node.ArgumentList!.Arguments.Count == 1);
var argument = node.ArgumentList.Arguments.First();
return argument.Expression.Accept(this);
}
}
Contract.Assert(!node.ArgumentList!.Arguments.Any());
var expression = node.Type.AcceptExpression(this);
creationExpression = new LuaInvocationExpressionSyntax(expression);
}
return GetObjectCreationInitializer(creationExpression, node);
}
private void FillObjectInitializerExpression(LuaIdentifierNameSyntax temp, InitializerExpressionSyntax node) {
foreach (var expression in node.Expressions) {
if (expression.IsKind(SyntaxKind.SimpleAssignmentExpression)) {
var assignment = (AssignmentExpressionSyntax)expression;
var left = assignment.Left.Accept(this);
if (assignment.Right.IsKind(SyntaxKind.CollectionInitializerExpression) || assignment.Right.IsKind(SyntaxKind.ObjectInitializerExpression)) {
var rightNode = (InitializerExpressionSyntax)assignment.Right;
if (rightNode.Expressions.Count > 0) {
var leftExpression = (LuaExpressionSyntax)left;
GetObjectCreationInitializer(new LuaMemberAccessExpressionSyntax(temp, leftExpression, leftExpression is not LuaIdentifierNameSyntax), rightNode, expression);
}
} else {
var right = assignment.Right.AcceptExpression(this);
if (assignment.Left.IsKind(SyntaxKind.ImplicitElementAccess)) {
var argumentList = (LuaArgumentListSyntax)left;
LuaIdentifierNameSyntax methodName = LuaSyntaxNode.Tokens.Set;
var invocation = temp.MemberAccess(methodName, true).Invocation();
invocation.ArgumentList.Arguments.AddRange(argumentList!.Arguments);
invocation.AddArgument(right);
CurBlock.AddStatement(invocation);
} else {
var memberAccess = BuildFieldOrPropertyMemberAccessExpression(temp, (LuaExpressionSyntax)left, false);
var assignmentExpression = BuildLuaSimpleAssignmentExpression(memberAccess, right);
CurBlock.AddStatement(assignmentExpression);
}
}
} else {
var symbol = semanticModel_.GetCollectionInitializerSymbolInfo(expression).Symbol;
var name = GetMemberName(symbol);
var invocation = temp.MemberAccess(name, true).Invocation();
var block = new LuaBlockSyntax();
PushBlock(block);
if (expression.IsKind(SyntaxKind.ComplexElementInitializerExpression)) {
var initializer = (InitializerExpressionSyntax)expression;
foreach (var expressionNode in initializer.Expressions) {
var argument = expressionNode.AcceptExpression(this);
invocation.AddArgument(argument);
}
} else {
var value = expression.AcceptExpression(this);
invocation.AddArgument(value);
}
PopBlock();
CurBlock.Statements.AddRange(block.Statements);
CurBlock.AddStatement(invocation);
}
}
}
public override LuaSyntaxNode VisitAnonymousObjectMemberDeclarator(AnonymousObjectMemberDeclaratorSyntax node) {
LuaIdentifierNameSyntax name;
var expression = node.Expression.AcceptExpression(this);
if (node.NameEquals != null) {
name = node.NameEquals.Accept<LuaIdentifierNameSyntax>(this);
} else {
var property = semanticModel_.GetDeclaredSymbol(node);
name = property!.Name;
}
return new LuaKeyValueTableItemSyntax(name, expression);
}
public override LuaSyntaxNode VisitAnonymousObjectCreationExpression(AnonymousObjectCreationExpressionSyntax node) {
var table = new LuaTableExpression();
foreach (var initializer in node.Initializers) {
var item = initializer.Accept<LuaKeyValueTableItemSyntax>(this);
table.Items.Add(item);
}
return LuaIdentifierNameSyntax.AnonymousType.Invocation(table);
}
public override LuaSyntaxNode VisitImplicitObjectCreationExpression(ImplicitObjectCreationExpressionSyntax node) {
var symbol = (IMethodSymbol)semanticModel_.GetSymbolInfo(node).Symbol;
string codeTemplate = XmlMetaProvider.GetMethodCodeTemplate(symbol);
var creationExpression = codeTemplate != null
? BuildCodeTemplateExpression(codeTemplate, node, FillCodeTemplateInvocationArguments(symbol, node.ArgumentList, null), symbol.TypeArguments)
: GetObjectCreationExpression(symbol, node);
return GetObjectCreationInitializer(creationExpression, node);
}
public override LuaSyntaxNode VisitInitializerExpression(InitializerExpressionSyntax node) {
if (node.IsKind(SyntaxKind.ArrayInitializerExpression)) {
var arrayType = (IArrayTypeSymbol)semanticModel_.GetTypeInfo(node).ConvertedType;
return BuildArrayTypeFromInitializer(arrayType, node);
}
var type = semanticModel_.GetTypeInfo(node!.Parent!).Type;
var expression = GetTypeName(type);
return expression.Invocation();
}
public override LuaSyntaxNode VisitBracketedArgumentList(BracketedArgumentListSyntax node) {
return BuildArgumentList(node.Arguments);
}
public override LuaSyntaxNode VisitImplicitElementAccess(ImplicitElementAccessSyntax node) {
return node.ArgumentList.Accept(this);
}
public override LuaSyntaxNode VisitGenericName(GenericNameSyntax node) {
ISymbol symbol = semanticModel_.GetSymbolInfo(node).Symbol;
Contract.Assert(symbol != null);
if (symbol.Kind == SymbolKind.Method) {
return GetMethodNameExpression((IMethodSymbol)symbol, node, false);
}
return GetTypeName(symbol);
}
public override LuaSyntaxNode VisitOmittedArraySizeExpression(OmittedArraySizeExpressionSyntax node) {
return LuaNumberLiteralExpressionSyntax.Zero;
}
public override LuaSyntaxNode VisitArrayRankSpecifier(ArrayRankSpecifierSyntax node) {
var rankSpecifier = new LuaArrayRankSpecifierSyntax(node.Rank);
foreach (var size in node.Sizes) {
var expression = size.AcceptExpression(this);
rankSpecifier.Sizes.Add(expression);
}
return rankSpecifier;
}
public override LuaSyntaxNode VisitArrayType(ArrayTypeSyntax node) {
var arrayType = semanticModel_.GetTypeInfo(node).Type;
var typeExpress = GetTypeName(arrayType);
var arrayRankSpecifier = node.RankSpecifiers[0].Accept<LuaArrayRankSpecifierSyntax>(this);
var arrayTypeAdapter = new LuaArrayTypeAdapterExpressionSyntax(typeExpress, arrayRankSpecifier);
return arrayTypeAdapter;
}
private void FillMultiArrayInitializer(InitializerExpressionSyntax initializer, LuaTableExpression rankSpecifier, List<LuaExpressionSyntax> expressions, bool isFirst) {
if (isFirst) {
rankSpecifier.Add(initializer.Expressions.Count);
}
int index = 0;
foreach (var expression in initializer.Expressions) {
if (expression.IsKind(SyntaxKind.ArrayInitializerExpression)) {
FillMultiArrayInitializer((InitializerExpressionSyntax)expression, rankSpecifier, expressions, isFirst && index == 0);
} else {
var item = expression.AcceptExpression(this);
expressions.Add(item);
}
++index;
}
}
private LuaExpressionSyntax BuildArrayCreationExpression(IArrayTypeSymbol symbol, LuaArrayTypeAdapterExpressionSyntax arrayType, InitializerExpressionSyntax initializer) {
if (initializer?.Expressions.Count > 0) {
if (arrayType.IsSimpleArray) {
var initializerExpressions = initializer.Expressions.Select(i => i.AcceptExpression(this)).ToList();
return BuildArray(symbol, arrayType, initializerExpressions);
}
var rank = new LuaTableExpression { IsSingleLine = true };
var expressions = new List<LuaExpressionSyntax>();
FillMultiArrayInitializer(initializer, rank, expressions, true);
return BuildMultiArray(arrayType, rank, expressions);
}
{
if (arrayType.IsSimpleArray) {
var size = arrayType.RankSpecifier.Sizes.FirstOrDefault() ?? LuaNumberLiteralExpressionSyntax.Zero;
if (size is LuaNumberLiteralExpressionSyntax { Number: 0 }) {
return BuildArray(symbol, arrayType, Array.Empty<LuaExpressionSyntax>());
}
return BuildArray(arrayType, size);
}
var rank = new LuaTableExpression { IsSingleLine = true };
foreach (var size in arrayType.RankSpecifier.Sizes) {
rank.Add(size);
}
return BuildMultiArray(arrayType, rank);
}
}
public override LuaSyntaxNode VisitArrayCreationExpression(ArrayCreationExpressionSyntax node) {
var arrayType = node.Type.Accept<LuaArrayTypeAdapterExpressionSyntax>(this);
var symbol = (IArrayTypeSymbol)semanticModel_.GetTypeInfo(node.Type).Type;
return BuildArrayCreationExpression(symbol, arrayType, node.Initializer);
}
private LuaExpressionSyntax BuildArrayTypeFromInitializer(IArrayTypeSymbol arrayType, InitializerExpressionSyntax initializer) {
var typeExpress = GetTypeName(arrayType);
var arrayExpression = new LuaArrayTypeAdapterExpressionSyntax(typeExpress, new LuaArrayRankSpecifierSyntax(arrayType.Rank));
return BuildArrayCreationExpression(arrayType, arrayExpression, initializer);
}
public override LuaSyntaxNode VisitImplicitArrayCreationExpression(ImplicitArrayCreationExpressionSyntax node) {
var arrayType = (IArrayTypeSymbol)semanticModel_.GetTypeInfo(node).Type;
return BuildArrayTypeFromInitializer(arrayType, node.Initializer);
}
private LuaInvocationExpressionSyntax BuildBaseFromThis() {
return new(LuaIdentifierNameSyntax.SystemBase, LuaIdentifierNameSyntax.This);
}
private LuaInvocationExpressionSyntax BuildCallBaseConstructor(INamedTypeSymbol type, ITypeSymbol baseType, int ctorCounter) {
var typeName = !generator_.IsSealed(type) ? GetTypeName(baseType) : BuildBaseFromThis();
var memberAccess = typeName.MemberAccess(LuaIdentifierNameSyntax.Ctor);
return ctorCounter > 0
? new LuaInvocationExpressionSyntax(new LuaTableIndexAccessExpressionSyntax(memberAccess, ctorCounter))
: new LuaInvocationExpressionSyntax(memberAccess);
}
private LuaInvocationExpressionSyntax BuildCallBaseConstructor(INamedTypeSymbol typeSymbol) {
return BuildCallBaseConstructor(typeSymbol, out int _);
}
private LuaInvocationExpressionSyntax BuildCallBaseConstructor(INamedTypeSymbol typeSymbol, out int ctorCounter) {
ctorCounter = 0;
var baseType = typeSymbol.BaseType;
if (baseType != null && !baseType.IsSystemObjectOrValueType()) {
if (baseType.IsFromCode()) {
if (baseType.InstanceConstructors.Length > 1) {
ctorCounter = 1;
}
}
var otherCtorInvoke = BuildCallBaseConstructor(typeSymbol, baseType, ctorCounter);
otherCtorInvoke.AddArgument(LuaIdentifierNameSyntax.This);
return otherCtorInvoke;
}
return null;
}
public override LuaSyntaxNode VisitConstructorDeclaration(ConstructorDeclarationSyntax node) {
if (node.Modifiers.IsExtern()) {
return null;
}
IMethodSymbol symbol = semanticModel_.GetDeclaredSymbol(node);
methodInfos_.Push(new MethodInfo(symbol));
var document = BuildDocumentationComment(node);
var attributes = BuildAttributes(node.AttributeLists);
document?.UnIgnore();
var refOrOutParameters = new List<LuaExpressionSyntax>();
var function = new LuaConstructorAdapterExpressionSyntax();
PushFunction(function);
bool isStatic = node.Modifiers.IsStatic();
function.IsStatic = isStatic;
function.AddParameter(LuaIdentifierNameSyntax.This);
foreach (var parameterNode in node.ParameterList.Parameters) {
var parameter = parameterNode.Accept<LuaIdentifierNameSyntax>(this);
function.AddParameter(parameter);
if (parameterNode.Modifiers.IsOutOrRef()) {
refOrOutParameters.Add(parameter);
}
}
if (node.Initializer != null) {
var initializerSymbol = (IMethodSymbol)semanticModel_.GetSymbolInfo(node.Initializer).Symbol;
int ctorIndex = GetConstructorIndex(initializerSymbol);
LuaInvocationExpressionSyntax otherCtorInvoke = null;
if (node.Initializer.IsKind(SyntaxKind.ThisConstructorInitializer)) {
Contract.Assert(ctorIndex != 0);
if (!symbol.IsCombineImplicitlyCtorMethod(out _)) {
LuaIdentifierNameSyntax thisCtor = LuaSyntaxNode.GetCtorNameString(ctorIndex);
otherCtorInvoke = new LuaInvocationExpressionSyntax(thisCtor);
function.IsInvokeThisCtor = true;
}
} else {
otherCtorInvoke = BuildCallBaseConstructor(symbol.ContainingType, initializerSymbol.ReceiverType, ctorIndex);
}
if (otherCtorInvoke != null) {
otherCtorInvoke.AddArgument(LuaIdentifierNameSyntax.This);
var refOrOutArguments = new List<RefOrOutArgument>();
var arguments = BuildArgumentList(initializerSymbol, initializerSymbol.Parameters, node.Initializer.ArgumentList, refOrOutArguments);
TryRemoveNilArgumentsAtTail(initializerSymbol, arguments);
otherCtorInvoke.AddArguments(arguments);
if (refOrOutArguments.Count == 0) {
function.AddStatement(otherCtorInvoke);
} else {
var newExpression = BuildInvokeRefOrOut(node.Initializer, otherCtorInvoke, refOrOutArguments);
function.AddStatement(newExpression);
}
}
} else if (!isStatic && generator_.IsBaseExplicitCtorExists(symbol.ContainingType.BaseType)) {
var baseCtorInvoke = BuildCallBaseConstructor(symbol.ContainingType, out _);
Contract.Assert(baseCtorInvoke != null);
function.AddStatement(baseCtorInvoke);
}
bool isCombineImplicitlyCtorMethod = false;
if (symbol.IsCombineImplicitlyCtorMethod(out int notNullParameterIndex)) {
var parameter = function.ParameterList.Parameters[notNullParameterIndex + 1];
var ifStatement = new LuaIfStatementSyntax(parameter.EqualsEquals(LuaIdentifierNameSyntax.Nil));
ifStatement.Body.AddStatement(new LuaReturnStatementSyntax());
function.AddStatement(ifStatement);
isCombineImplicitlyCtorMethod = true;
}
if (node.Body != null) {
var block = node.Body.Accept<LuaBlockSyntax>(this);
function.AddStatements(block.Statements);
} else {
var bodyExpression = node.ExpressionBody.AcceptExpression(this);
function.AddStatement(bodyExpression);
}
if (refOrOutParameters.Count > 0) {
var returnStatement = new LuaReturnStatementSyntax();
returnStatement.Expressions.AddRange(refOrOutParameters);
function.AddStatement(returnStatement);
}
PopFunction();
if (isStatic) {
CurType.SetStaticCtor(function, document);
} else {
CurType.AddCtor(function, node.ParameterList.Parameters.Count == 0 || isCombineImplicitlyCtorMethod, document);
bool isExportMetadata = IsCurTypeExportMetadataAll || attributes.Count > 0 || symbol.HasMetadataAttribute();
if (isExportMetadata) {
int ctorIndex = GetConstructorIndex(symbol);
LuaIdentifierNameSyntax name;
if (ctorIndex == 0) {
name = LuaIdentifierNameSyntax.Nil;
} else if (isCombineImplicitlyCtorMethod && symbol.ContainingType.InstanceConstructors.Length == 2) {
name = LuaIdentifierNameSyntax.Ctor;
} else {
name = LuaSyntaxNode.GetCtorNameString(ctorIndex);
}
AddMethodMetaData(new MethodDeclarationResult {
Symbol = symbol,
Name = name,
Function = function,
Document = document,
Attributes = attributes,
});
}
}
methodInfos_.Pop();
return function;
}
public override LuaSyntaxNode VisitDestructorDeclaration(DestructorDeclarationSyntax node) {
if (node.Body != null || node.ExpressionBody != null) {
IMethodSymbol ctorSymbol = semanticModel_.GetDeclaredSymbol(node);
methodInfos_.Push(new MethodInfo(ctorSymbol));
var function = new LuaFunctionExpressionSyntax();
PushFunction(function);
function.AddParameter(LuaIdentifierNameSyntax.This);
if (node.Body != null) {
var block = node.Body.Accept<LuaBlockSyntax>(this);
function.Body.Statements.AddRange(block.Statements);
} else {
var bodyExpression = node.ExpressionBody.AcceptExpression(this);
function.AddStatement(bodyExpression);
}
CurType.AddMethod(LuaIdentifierNameSyntax.__GC, function, false);
PopFunction();
methodInfos_.Pop();
return function;
}
return null;
}
public override LuaSyntaxNode VisitSimpleBaseType(SimpleBaseTypeSyntax node) {
return node.Type.Accept(this);
}
private LuaExpressionSyntax VisitLambdaExpression(IEnumerable<ParameterSyntax> parameters, CSharpSyntaxNode body) {
var symbol = (IMethodSymbol)semanticModel_.GetSymbolInfo(body.Parent).Symbol;
methodInfos_.Push(new MethodInfo(symbol));
var function = new LuaFunctionExpressionSyntax();
PushFunction(function);
if (parameters != null) {
foreach (var parameter in parameters) {
var luaParameter = parameter.Accept<LuaIdentifierNameSyntax>(this);
function.ParameterList.Parameters.Add(luaParameter);
}
}
LuaExpressionSyntax resultExpression = function;
if (body.IsKind(SyntaxKind.Block)) {
var block = body.Accept<LuaBlockSyntax>(this);
function.AddStatements(block.Statements);
} else {
var type = (INamedTypeSymbol)semanticModel_.GetTypeInfo(body.Parent).ConvertedType;
var expression = body.AcceptExpression(this);
var delegateInvokeMethod = type.DelegateInvokeMethod;
if (delegateInvokeMethod == null) {
// is System.Linq.Expressions
var delegateType = (INamedTypeSymbol)type.TypeArguments.First();
delegateInvokeMethod = delegateType.DelegateInvokeMethod;
}
if (delegateInvokeMethod!.ReturnsVoid) {
if (expression != LuaExpressionSyntax.EmptyExpression) {
function.AddStatement(expression);
}
} else {
function.AddStatement(new LuaReturnStatementSyntax(expression));
}
}
if (symbol.IsAsync) {
VisitAsync(symbol.ReturnsVoid, function);
}
PopFunction();
methodInfos_.Pop();
return resultExpression;
}
public override LuaSyntaxNode VisitSimpleLambdaExpression(SimpleLambdaExpressionSyntax node) {
return VisitLambdaExpression(new[] { node.Parameter }, node.Body);
}
public override LuaSyntaxNode VisitParenthesizedLambdaExpression(ParenthesizedLambdaExpressionSyntax node) {
return VisitLambdaExpression(node.ParameterList.Parameters, node.Body);
}
public override LuaSyntaxNode VisitAnonymousMethodExpression(AnonymousMethodExpressionSyntax node) {
return VisitLambdaExpression(node.ParameterList?.Parameters, node.Body);
}
public override LuaSyntaxNode VisitTypeParameter(TypeParameterSyntax node) {
return (LuaIdentifierNameSyntax)node.Identifier.ValueText;
}
public override LuaSyntaxNode VisitTypeOfExpression(TypeOfExpressionSyntax node) {
var type = semanticModel_.GetTypeInfo(node.Type).Type;
if (type?.TypeKind == TypeKind.Enum) {
AddExportEnum(type);
var typeNameExpression = GetTypeShortName(type);
return new LuaInvocationExpressionSyntax(LuaIdentifierNameSyntax.TypeOf, typeNameExpression);
}
var typeName = node.Type.AcceptExpression(this);
return new LuaInvocationExpressionSyntax(LuaIdentifierNameSyntax.TypeOf, typeName);
}
public override LuaSyntaxNode VisitThrowStatement(ThrowStatementSyntax node) {
var invocationExpression = new LuaInvocationExpressionSyntax(LuaIdentifierNameSyntax.Throw);
if (node.Expression != null) {
var expression = node.Expression.AcceptExpression(this);
invocationExpression.AddArgument(expression);
} else {
var curTryFunction = (LuaTryAdapterExpressionSyntax)CurFunction;
Contract.Assert(curTryFunction.CatchTemp != null);
invocationExpression.AddArgument(curTryFunction.CatchTemp);
}
return new LuaExpressionStatementSyntax(invocationExpression);
}
public override LuaSyntaxNode VisitThrowExpression(ThrowExpressionSyntax node) {
var invocationExpression = new LuaInvocationExpressionSyntax(LuaIdentifierNameSyntax.Throw);
var expression = node.Expression.AcceptExpression(this);
invocationExpression.AddArgument(expression);
return invocationExpression;
}
public override LuaSyntaxNode VisitCatchFilterClause(CatchFilterClauseSyntax node) {
var function = new LuaFunctionExpressionSyntax();
PushFunction(function);
var expression = node.FilterExpression.AcceptExpression(this);
function.AddStatement(new LuaReturnStatementSyntax(expression));
PopFunction();
return new LuaInvocationExpressionSyntax(LuaIdentifierNameSyntax.CatchFilter, function);
}
public override LuaSyntaxNode VisitCatchClause(CatchClauseSyntax node) {
throw new InvalidOperationException();
}
public override LuaSyntaxNode VisitCatchDeclaration(CatchDeclarationSyntax node) {
return new LuaVariableDeclaratorSyntax(node.Identifier.ValueText);
}
private LuaTryAdapterExpressionSyntax VisitTryCatchesExpress(SyntaxList<CatchClauseSyntax> catches) {
LuaTryAdapterExpressionSyntax functionExpress = new LuaTryAdapterExpressionSyntax();
PushFunction(functionExpress);
var temp = GetTempIdentifier();
functionExpress.CatchTemp = temp;
functionExpress.AddParameter(temp);
LuaIfStatementSyntax ifStatement = null;
LuaInvocationExpressionSyntax filter = null;
bool hasCatchRoot = false;
foreach (var catchNode in catches) {
bool isRootExceptionDeclaration = false;
LuaExpressionSyntax ifCondition = null;
if (catchNode.Filter != null) {
filter = catchNode.Filter.Accept<LuaInvocationExpressionSyntax>(this);
ifCondition = filter;
}
if (catchNode.Declaration != null) {
var typeName = catchNode.Declaration.Type.Accept<LuaIdentifierNameSyntax>(this);
var typeSymbol = semanticModel_.GetTypeInfo(catchNode.Declaration.Type).Type;
if (!typeSymbol.EQ(generator_.SystemExceptionTypeSymbol)) {
var mathTypeInvocation = new LuaInvocationExpressionSyntax(LuaIdentifierNameSyntax.Is, temp, typeName);
if (ifCondition != null) {
ifCondition = ifCondition.And(mathTypeInvocation);
} else {
ifCondition = mathTypeInvocation;
}
} else {
if (!catchNode.Declaration.Identifier.IsKind(SyntaxKind.None)) {
isRootExceptionDeclaration = true;
}
hasCatchRoot = true;
}
} else {
hasCatchRoot = true;
}
var block = catchNode.Block.Accept<LuaBlockSyntax>(this);
if (ifCondition != null) {
LuaBlockSyntax body;
if (ifStatement == null) {
ifStatement = new LuaIfStatementSyntax(ifCondition);
body = ifStatement.Body;
} else {
var elseIfStatement = new LuaElseIfStatementSyntax(ifCondition);
body = elseIfStatement.Body;
ifStatement.ElseIfStatements.Add(elseIfStatement);
}
if (catchNode.Declaration != null && !catchNode.Declaration.Identifier.IsKind(SyntaxKind.None)) {
var declaration = catchNode.Declaration.Accept<LuaVariableDeclaratorSyntax>(this);
declaration.Initializer = new LuaEqualsValueClauseSyntax(temp);
body.Statements.Add(new LuaLocalVariableDeclaratorSyntax(declaration));
if (filter != null) {
var when = (LuaFunctionExpressionSyntax)filter.Arguments.First();
when.AddParameter(declaration.Identifier);
filter.AddArgument(temp);
}
}
body.Statements.AddRange(block.Statements);
} else {
if (isRootExceptionDeclaration) {
var declaration = catchNode.Declaration.Accept<LuaVariableDeclaratorSyntax>(this);
declaration.Initializer = new LuaEqualsValueClauseSyntax(temp);
block.Statements.Insert(0, new LuaLocalVariableDeclaratorSyntax(declaration));
}
if (ifStatement != null) {
var elseClause = new LuaElseClauseSyntax();
elseClause.Body.Statements.AddRange(block.Statements);
ifStatement.Else = elseClause;
} else {
functionExpress.AddStatements(block.Statements);
}
break;
}
}
if (ifStatement != null) {
if (!hasCatchRoot) {
Contract.Assert(ifStatement.Else == null);
var rethrowStatement = new LuaReturnStatementSyntax();
rethrowStatement.Expressions.Add(LuaIdentifierNameSyntax.One);
rethrowStatement.Expressions.Add(temp);
LuaBlockSyntax block = new LuaBlockSyntax();
block.Statements.Add(rethrowStatement);
LuaElseClauseSyntax elseClause = new LuaElseClauseSyntax();
elseClause.Body.Statements.AddRange(block.Statements);
ifStatement.Else = elseClause;
}
functionExpress.AddStatement(ifStatement);
}
PopFunction();
return functionExpress;
}
private LuaStatementSyntax BuildCheckLoopControlInvocationExpression(LuaInvocationExpressionSyntax invocationExpression, LuaCheckLoopControlExpressionSyntax check) {
return BuildCheckLoopControlInvocationExpression(invocationExpression, check.HasReturn, check.HasBreak, check.HasContinue);
}
private LuaStatementSyntax BuildCheckLoopControlInvocationExpression(LuaInvocationExpressionSyntax invocationExpression, IEnumerable<LuaCheckLoopControlExpressionSyntax> checks) {
return BuildCheckLoopControlInvocationExpression(invocationExpression, checks.Any(i => i.HasReturn), checks.Any(i => i.HasBreak), checks.Any(i => i.HasContinue));
}
private LuaStatementSyntax BuildCheckLoopControlInvocationExpression(LuaInvocationExpressionSyntax invocationExpression, bool hasReturn, bool hasBreak, bool hasContinue) {
if (!hasReturn && !hasBreak && !hasContinue) {
return invocationExpression;
}
var curMethodInfo = CurMethodInfoOrNull;
bool isReturnValueExists = hasReturn && curMethodInfo != null && !curMethodInfo.Symbol.ReturnsVoid;
var status = GetTempIdentifier();
var returnValue = isReturnValueExists ? GetTempIdentifier() : null;
var localVariables = new LuaLocalVariablesSyntax();
localVariables.Variables.Add(status);
if (isReturnValueExists) {
localVariables.Variables.Add(returnValue);
}
localVariables.Initializer = new LuaEqualsValueClauseListSyntax(invocationExpression);
var statements = new LuaStatementListSyntax();
statements.Statements.Add(localVariables);
LuaIfStatementSyntax ifStatement = null;
if (hasReturn) {
ifStatement = new LuaIfStatementSyntax(status);
var statement = InternalVisitReturnStatement(returnValue);
ifStatement.Body.Statements.Add(statement);
}
if (hasBreak || hasContinue) {
var condition = status.EqualsEquals(LuaIdentifierLiteralExpressionSyntax.False);
if (ifStatement != null) {
var elseIfStatement = new LuaElseIfStatementSyntax(condition);
elseIfStatement.Body.AddStatement(LuaBreakStatementSyntax.Instance);
ifStatement.ElseIfStatements.Add(elseIfStatement);
} else {
ifStatement = new LuaIfStatementSyntax(condition);
ifStatement.Body.Statements.Add(LuaBreakStatementSyntax.Instance);
}
}
statements.Statements.Add(ifStatement);
return statements;
}
public override LuaSyntaxNode VisitFinallyClause(FinallyClauseSyntax node) {
var functionExpress = new LuaFunctionExpressionSyntax();
PushFunction(functionExpress);
var finallyBlock = node.Block.Accept<LuaBlockSyntax>(this);
PopFunction();
functionExpress.AddStatements(finallyBlock.Statements);
return functionExpress;
}
public override LuaSyntaxNode VisitTryStatement(TryStatementSyntax node) {
var tryInvocationExpression = new LuaInvocationExpressionSyntax(LuaIdentifierNameSyntax.Try);
var tryExpress = new LuaTryAdapterExpressionSyntax();
PushFunction(tryExpress);
var block = node.Block.Accept<LuaBlockSyntax>(this);
PopFunction();
tryExpress.AddStatements(block.Statements);
tryInvocationExpression.AddArgument(tryExpress);
if (node.Catches.Count > 0) {
var catchesExpress = VisitTryCatchesExpress(node.Catches);
tryInvocationExpression.AddArgument(catchesExpress);
} else {
tryInvocationExpression.AddArgument(LuaIdentifierNameSyntax.Nil);
}
var tryExpresses = tryInvocationExpression.ArgumentList.Arguments.OfType<LuaTryAdapterExpressionSyntax>();
if (node.Finally != null) {
var finallyFunctionExpress = node.Finally.Accept<LuaFunctionExpressionSyntax>(this);
tryInvocationExpression.AddArgument(finallyFunctionExpress);
}
return BuildCheckLoopControlInvocationExpression(tryInvocationExpression, tryExpresses);
}
private LuaStatementSyntax BuildUsingStatement(List<LuaIdentifierNameSyntax> variableIdentifiers, List<LuaExpressionSyntax> variableExpressions, Action<LuaBlockSyntax> writeStatements) {
var usingAdapterExpress = new LuaUsingAdapterExpressionSyntax();
usingAdapterExpress.ParameterList.Parameters.AddRange(variableIdentifiers);
PushFunction(usingAdapterExpress);
var block = new LuaBlockSyntax();
writeStatements(block);
usingAdapterExpress.AddStatements(block.Statements);
PopFunction();
if (variableExpressions.Count == 1) {
var usingInvocationExpression = new LuaInvocationExpressionSyntax(LuaIdentifierNameSyntax.Using);
usingInvocationExpression.AddArgument(variableExpressions.First());
usingInvocationExpression.AddArgument(usingAdapterExpress);
return BuildCheckLoopControlInvocationExpression(usingInvocationExpression, usingAdapterExpress);
} else {
var usingInvocationExpression = new LuaInvocationExpressionSyntax(LuaIdentifierNameSyntax.UsingX);
usingInvocationExpression.AddArgument(usingAdapterExpress);
usingInvocationExpression.ArgumentList.Arguments.AddRange(variableExpressions);
return BuildCheckLoopControlInvocationExpression(usingInvocationExpression, usingAdapterExpress);
}
}
public override LuaSyntaxNode VisitUsingStatement(UsingStatementSyntax node) {
var variableIdentifiers = new List<LuaIdentifierNameSyntax>();
var variableExpressions = new List<LuaExpressionSyntax>();
if (node.Declaration != null) {
var variableList = node.Declaration.Accept<LuaVariableListDeclarationSyntax>(this);
foreach (var variable in variableList.Variables) {
variableIdentifiers.Add(variable.Identifier);
variableExpressions.Add(variable.Initializer.Value);
}
} else {
var expression = node.Expression.AcceptExpression(this);
variableExpressions.Add(expression);
}
return BuildUsingStatement(variableIdentifiers, variableExpressions, body => WriteStatementOrBlock(node.Statement, body));
}
private void ApplyUsingDeclarations(LuaBlockSyntax block, List<int> indexes, BlockSyntax node) {
int position = indexes.Count - 1;
while (position >= 1 && indexes[position] == indexes[position - 1] + 1) {
--position;
}
var variableIdentifiers = new List<LuaIdentifierNameSyntax>();
var variableExpressions = new List<LuaExpressionSyntax>();
for (int i = position; i < indexes.Count; ++i) {
int index = indexes[i];
var localDeclaration = (LuaLocalDeclarationStatementSyntax)block.Statements[index];
var variableList = (LuaVariableListDeclarationSyntax)localDeclaration.Declaration;
foreach (var variable in variableList.Variables) {
variableIdentifiers.Add(variable.Identifier);
variableExpressions.Add(variable.Initializer.Value);
}
}
int lastIndex = indexes.Last();
var statements = block.Statements.Skip(lastIndex + 1);
var usingStatement = BuildUsingStatement(variableIdentifiers, variableExpressions, body => body.Statements.AddRange(statements));
block.Statements.RemoveRange(indexes[position]);
block.AddStatement(usingStatement);
indexes.RemoveRange(position);
if (indexes.Count > 0) {
ApplyUsingDeclarations(block, indexes, node);
}
}
public override LuaSyntaxNode VisitThisExpression(ThisExpressionSyntax node) {
return LuaIdentifierNameSyntax.This;
}
private enum BaseVisitType {
UseThis,
UseName,
UseBase,
}
private BaseVisitType CheckBaseVisitType<T>(T symbol, Func<T, ISymbol> overriddenFunc) where T : ISymbol {
if (symbol.IsOverridable()) {
var curTypeSymbol = CurTypeSymbol;
if (generator_.IsSealed(curTypeSymbol)) {
bool exists = curTypeSymbol.GetMembers().OfType<T>().Any(i => {
var overriddenSymbol = overriddenFunc(i);
return overriddenSymbol != null && overriddenSymbol.OriginalDefinition.EQ(symbol.OriginalDefinition);
});
return exists ? BaseVisitType.UseBase : BaseVisitType.UseThis;
}
return BaseVisitType.UseName;
}
return BaseVisitType.UseThis;
}
public override LuaSyntaxNode VisitBaseExpression(BaseExpressionSyntax node) {
var symbol = semanticModel_.GetSymbolInfo(node.Parent!).Symbol;
Contract.Assert(symbol != null);
BaseVisitType useType = BaseVisitType.UseThis;
switch (symbol.Kind) {
case SymbolKind.Method: {
symbol.IsOverridable();
var methodSymbol = (IMethodSymbol)symbol;
useType = CheckBaseVisitType(methodSymbol, i => i.OverriddenMethod);
break;
}
case SymbolKind.Property: {
var propertySymbol = (IPropertySymbol)symbol;
if (!IsPropertyField(propertySymbol)) {
useType = CheckBaseVisitType(propertySymbol, i => i.OverriddenProperty);
}
break;
}
case SymbolKind.Event: {
var eventSymbol = (IEventSymbol)symbol;
if (!IsEventField(eventSymbol)) {
useType = CheckBaseVisitType(eventSymbol, i => i.OverriddenEvent);
}
break;
}
}
switch (useType) {
case BaseVisitType.UseThis:
return LuaIdentifierNameSyntax.This;
case BaseVisitType.UseName:
return GetTypeName(symbol.ContainingType);
case BaseVisitType.UseBase:
return BuildBaseFromThis();
default:
Contract.Assert(false);
throw new InvalidOperationException();
}
}
private bool IsReturnVoidConditionalAccessExpression(ConditionalAccessExpressionSyntax node) {
switch (node.Parent?.Kind()) {
case SyntaxKind.ExpressionStatement: {
return true;
}
case SyntaxKind.ArrowExpressionClause:
case SyntaxKind.ParenthesizedLambdaExpression:
case SyntaxKind.SimpleLambdaExpression: {
if (CurMethodInfoOrNull.Symbol.ReturnsVoid) {
return true;
}
break;
}
}
return false;
}
public override LuaSyntaxNode VisitConditionalAccessExpression(ConditionalAccessExpressionSyntax node) {
bool isEmpty = functions_.Count == 0;
if (isEmpty) {
LuaFunctionExpressionSyntax function = new LuaFunctionExpressionSyntax();
PushFunction(function);
}
bool isRoot = !node.Parent.IsKind(SyntaxKind.ConditionalAccessExpression);
if (isRoot) {
conditionalTemps_.Push(GetTempIdentifier());
}
var temp = conditionalTemps_.Peek();
var expression = node.Expression.AcceptExpression(this);
if (isRoot) {
CurBlock.AddStatement(new LuaLocalVariableDeclaratorSyntax(temp, expression));
} else {
CurBlock.AddStatement(temp.Assignment(expression));
}
var ifStatement = new LuaIfStatementSyntax(temp.NotEquals(LuaIdentifierNameSyntax.Nil));
CurBlock.Statements.Add(ifStatement);
PushBlock(ifStatement.Body);
var whenNotNull = node.WhenNotNull.AcceptExpression(this);
PopBlock();
if (isRoot) {
conditionalTemps_.Pop();
AddReleaseTempIdentifier();
}
if (IsReturnVoidConditionalAccessExpression(node)) {
if (isEmpty) {
throw new InvalidOperationException();
}
if (!node.WhenNotNull.IsKind(SyntaxKind.ConditionalAccessExpression)) {
ifStatement.Body.AddStatement(whenNotNull);
}
return LuaExpressionSyntax.EmptyExpression;
}
if (!node.WhenNotNull.IsKind(SyntaxKind.ConditionalAccessExpression)) {
ifStatement.Body.AddStatement(temp.Assignment(whenNotNull));
}
if (isEmpty) {
var function = CurFunction;
function.AddStatement(new LuaReturnStatementSyntax(temp));
PopFunction();
return function.Parenthesized().Invocation();
}
return temp;
}
public override LuaSyntaxNode VisitMemberBindingExpression(MemberBindingExpressionSyntax node) {
var symbol = semanticModel_.GetSymbolInfo(node).Symbol;
Contract.Assert(symbol != null);
if (IsDelegateInvoke(symbol, node.Name)) {
return conditionalTemps_.Peek();
}
var nameExpression = node.Name.AcceptExpression(this);
var target = conditionalTemps_.Peek();
if (generator_.IsInlineSymbol(symbol)) {
return nameExpression;
}