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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 System.Text.RegularExpressions;
using System.Globalization;
using Microsoft.CodeAnalysis;
using Microsoft.CodeAnalysis.CSharp;
using Microsoft.CodeAnalysis.CSharp.Syntax;
using CSharpLua.LuaAst;
namespace CSharpLua {
public sealed partial class LuaSyntaxNodeTransform {
private sealed class FunctionUpValuesInfo {
private readonly HashSet<string> strings_ = new HashSet<string>();
private readonly HashSet<ISymbol> symbols_ = new HashSet<ISymbol>();
public int Count { get; private set; }
public void Add(object nameStringOrSymbol) {
if (nameStringOrSymbol is string name) {
if (strings_.Add(name)) {
++Count;
}
} else {
var symbol = (ISymbol)nameStringOrSymbol;
if (symbols_.Add(symbol.OriginalDefinition)) {
Count += symbol.Kind == SymbolKind.Property || symbol.Kind == SymbolKind.Event ? 2 : 1;
}
}
}
internal bool Contains(object nameStringOrSymbol) {
if (nameStringOrSymbol is string name) {
return strings_.Contains(name);
}
return symbols_.Contains((ISymbol)nameStringOrSymbol);
}
}
private const int kMaxArrayInitializerCount = 225;
private static readonly Regex codeTemplateRegex_ = new Regex(@"(,?\s*)\{(\*?[\w|^]+)\}", RegexOptions.Compiled);
private static readonly Regex unicodeRegex_ = new Regex(@"\\u([0-9a-fA-F]{4})", RegexOptions.Compiled);
private readonly Dictionary<ISymbol, LuaIdentifierNameSyntax> localReservedNames_ = new Dictionary<ISymbol, LuaIdentifierNameSyntax>();
private readonly Dictionary<LuaFunctionExpressionSyntax, FunctionUpValuesInfo> functionUpValues_ = new Dictionary<LuaFunctionExpressionSyntax, FunctionUpValuesInfo>();
private int localMappingCounter_;
private readonly Stack<bool> checkeds_ = new Stack<bool>();
private abstract class LuaSyntaxSearcher : CSharpSyntaxWalker {
private sealed class FoundException : Exception {
}
protected void Found() {
throw new FoundException();
}
public bool Find(SyntaxNode root) {
try {
Visit(root);
} catch (FoundException) {
return true;
}
return false;
}
}
private sealed class LocalVarSearcher : LuaSyntaxSearcher {
private readonly string name_;
public LocalVarSearcher(string name) {
name_ = name;
}
public override void VisitParameter(ParameterSyntax node) {
if (node.Identifier.ValueText == name_) {
Found();
}
}
public override void VisitVariableDeclarator(VariableDeclaratorSyntax node) {
if (node.Identifier.ValueText == name_) {
Found();
}
}
}
private bool IsLocalVarExists(string name, SyntaxNode root) {
LocalVarSearcher searcher = new LocalVarSearcher(name);
return searcher.Find(root);
}
private SyntaxNode FindFromCur(SyntaxNode node, Func<SyntaxNode, bool> macth) {
var cur = node;
while (cur != null) {
if (macth(cur)) {
return cur;
}
cur = cur.Parent;
}
return null;
}
private SyntaxNode FindParent(SyntaxNode node, Func<SyntaxNode, bool> macth) {
var parent = node.Parent;
while (true) {
if (macth(parent)) {
return parent;
}
parent = parent.Parent;
}
}
private SyntaxNode FindParent(SyntaxNode node, SyntaxKind kind) {
return FindParent(node, i => i.IsKind(kind));
}
private T FindParent<T>(SyntaxNode node) where T : CSharpSyntaxNode {
return (T)FindParent(node, i => i is T);
}
private (SyntaxNode node, BlockSyntax body) FindParentMethodDeclaration(SyntaxNode node) {
BlockSyntax body = null;
var parnet = FindParent(node, i => {
switch (i.Kind()) {
case SyntaxKind.ConstructorDeclaration:
case SyntaxKind.MethodDeclaration:
case SyntaxKind.OperatorDeclaration:
case SyntaxKind.ConversionOperatorDeclaration: {
var methodDeclaration = (BaseMethodDeclarationSyntax)i;
body = methodDeclaration.Body;
return true;
}
case SyntaxKind.LocalFunctionStatement: {
var localFunction = (LocalFunctionStatementSyntax)i;
body = localFunction.Body;
return true;
}
case SyntaxKind.GetAccessorDeclaration:
case SyntaxKind.SetAccessorDeclaration: {
var accessorDeclaration = (AccessorDeclarationSyntax)i;
body = accessorDeclaration.Body;
return true;
}
}
return false;
});
return (parnet, body);
}
private BlockSyntax FindParentMethodBody(SyntaxNode node) {
return FindParentMethodDeclaration(node).body;
}
private string GetUniqueIdentifier(string name, SyntaxNode node, int index = 0) {
var (root, _) = FindParentMethodDeclaration(node);
while (true) {
string newName = Utility.GetNewIdentifierName(name, index);
bool exists = IsLocalVarExists(newName, root);
if (!exists) {
return newName;
}
++index;
}
}
private bool CheckLocalBadWord(ref string name, SyntaxNode node) {
if (LuaSyntaxNode.IsReservedWord(name)) {
name = GetUniqueIdentifier(name, node, 1);
return true;
} else if (Utility.IsIdentifierIllegal(ref name)) {
name = GetUniqueIdentifier(name, node, 0);
return true;
}
return false;
}
private void AddLocalVariableMapping(LuaIdentifierNameSyntax name, SyntaxNode node) {
ISymbol symbol = semanticModel_.GetDeclaredSymbol(node);
Contract.Assert(symbol != null);
localReservedNames_.Add(symbol, name);
}
private bool CheckLocalVariableName(ref LuaIdentifierNameSyntax identifierName, SyntaxNode node) {
string name = identifierName.ValueText;
bool isReserved = CheckLocalBadWord(ref name, node);
if (isReserved) {
identifierName = name;
AddLocalVariableMapping(identifierName, node);
return true;
}
return false;
}
private void CheckLocalSymbolName(ISymbol symbol, ref LuaIdentifierNameSyntax name) {
var newName = localReservedNames_.GetOrDefault(symbol);
if (newName != null) {
name = newName;
}
}
private static bool IsStaticLocalMethodEnableAddToType(IMethodSymbol symbol) {
const int kMaxMemberCountLimit = 150;
return symbol.ContainingType.GetMembers().Length < kMaxMemberCountLimit;
}
private LuaIdentifierNameSyntax GetLocalMethodName(IMethodSymbol symbol, SyntaxNode node) {
Contract.Assert(symbol.MethodKind == MethodKind.LocalFunction);
var identifierName = localReservedNames_.GetOrDefault(symbol);
if (identifierName == null) {
var lcoalFunctionNode = (LocalFunctionStatementSyntax)symbol.GetDeclaringSyntaxNode();
string name = symbol.Name;
if (lcoalFunctionNode.Modifiers.IsStatic() && IsStaticLocalMethodEnableAddToType(symbol)) {
Utility.IsIdentifierIllegal(ref name);
name = generator_.GetUniqueNameInType(symbol.ContainingType, name, newName => {
if (LuaSyntaxNode.IsMethodReservedWord(newName)) {
return false;
}
var body = FindParentMethodBody(node);
Contract.Assert(body != null);
return !IsLocalVarExists(newName, body);
});
} else {
if (LuaSyntaxNode.IsReservedWord(name)) {
CheckLocalBadWord(ref name, node);
}
}
identifierName = name;
localReservedNames_.Add(symbol, identifierName);
}
return identifierName;
}
private sealed class ContinueSearcher : LuaSyntaxSearcher {
public override void VisitContinueStatement(ContinueStatementSyntax node) {
Found();
}
}
private bool IsContinueExists(SyntaxNode node) {
ContinueSearcher searcher = new ContinueSearcher();
return searcher.Find(node);
}
private sealed class ReturnStatementSearcher : LuaSyntaxSearcher {
public override void VisitReturnStatement(ReturnStatementSyntax node) {
Found();
}
}
private bool IsReturnExists(SyntaxNode node) {
ReturnStatementSearcher searcher = new ReturnStatementSearcher();
return searcher.Find(node);
}
private int GetCaseLabelIndex(GotoStatementSyntax node) {
var switchStatement = (SwitchStatementSyntax)FindParent(node, SyntaxKind.SwitchStatement);
int index = 0;
foreach (var section in switchStatement.Sections) {
bool isFound = section.Labels.Any(i => {
if (i.IsKind(SyntaxKind.CaseSwitchLabel)) {
var label = (CaseSwitchLabelSyntax)i;
if (label.Value.ToString() == node.Expression.ToString()) {
return true;
}
}
return false;
});
if (isFound) {
return index;
}
++index;
}
throw new InvalidOperationException();
}
private LuaExpressionSyntax BuildCodeTemplateExpression(string codeTemplate, ExpressionSyntax targetExpression) {
return InternalBuildCodeTemplateExpression(codeTemplate, targetExpression, null, null);
}
private LuaExpressionSyntax BuildCodeTemplateExpression(string codeTemplate, ExpressionSyntax targetExpression, IEnumerable<LuaExpressionSyntax> arguments, IList<ITypeSymbol> typeArguments) {
return InternalBuildCodeTemplateExpression(codeTemplate, targetExpression, arguments.Select<LuaExpressionSyntax, Func<LuaExpressionSyntax>>(i => () => i), typeArguments);
}
private LuaExpressionSyntax BuildCodeTemplateExpression(string codeTemplate, ExpressionSyntax targetExpression, IEnumerable<ExpressionSyntax> arguments, IList<ITypeSymbol> typeArguments) {
return InternalBuildCodeTemplateExpression(codeTemplate, targetExpression, arguments.Select<ExpressionSyntax, Func<LuaExpressionSyntax>>(i => () => VisitExpression(i)), typeArguments);
}
private void AddCodeTemplateExpression(LuaExpressionSyntax expression, string comma, LuaCodeTemplateExpressionSyntax codeTemplateExpression) {
if (!string.IsNullOrEmpty(comma)) {
codeTemplateExpression.Expressions.Add(comma);
}
codeTemplateExpression.Expressions.Add(expression);
}
private LuaExpressionSyntax InternalBuildCodeTemplateExpression(
string codeTemplate,
ExpressionSyntax targetExpression,
IEnumerable<Func<LuaExpressionSyntax>> arguments,
IList<ITypeSymbol> typeArguments,
LuaIdentifierNameSyntax memberBindingIdentifier = null) {
LuaCodeTemplateExpressionSyntax codeTemplateExpression = new LuaCodeTemplateExpressionSyntax();
var matchs = codeTemplateRegex_.Matches(codeTemplate);
int prevIndex = 0;
foreach (Match match in matchs) {
if (match.Index > prevIndex) {
string prevToken = codeTemplate.Substring(prevIndex, match.Index - prevIndex);
codeTemplateExpression.Expressions.Add(prevToken);
}
string comma = match.Groups[1].Value;
string key = match.Groups[2].Value;
if (key == "this") {
AddCodeTemplateExpression(memberBindingIdentifier ?? BuildMemberAccessTargetExpression(targetExpression), comma, codeTemplateExpression);
} else if (key == "class") {
var type = semanticModel_.GetTypeInfo(targetExpression).Type;
LuaExpressionSyntax typeName;
if (type.IsEnumType(out var enumTypeSymbol)) {
typeName = GetTypeShortName(enumTypeSymbol);
AddExportEnum(enumTypeSymbol);
} else {
typeName = GetTypeName(type);
}
AddCodeTemplateExpression(typeName, comma, codeTemplateExpression);
} else if (key[0] == '^') {
if (int.TryParse(key.Substring(1), out int typeIndex)) {
var typeArgument = typeArguments.GetOrDefault(typeIndex);
if (typeArgument != null) {
LuaExpressionSyntax typeName;
if (typeArgument.TypeKind == TypeKind.Enum && codeTemplate.StartsWith("System.Enum.TryParse")) {
typeName = GetTypeShortName(typeArgument);
AddExportEnum(typeArgument);
} else {
typeName = GetTypeName(typeArgument);
}
AddCodeTemplateExpression(typeName, comma, codeTemplateExpression);
}
}
} else if (key[0] == '*') {
if (int.TryParse(key.Substring(1), out int paramsIndex)) {
LuaSequenceListExpressionSyntax sequenceList = new LuaSequenceListExpressionSyntax();
foreach (var argument in arguments.Skip(paramsIndex)) {
var argumentExpression = argument();
sequenceList.Expressions.Add(argumentExpression);
}
if (sequenceList.Expressions.Count > 0) {
AddCodeTemplateExpression(sequenceList, comma, codeTemplateExpression);
}
}
} else {
if (int.TryParse(key, out int argumentIndex)) {
var argument = arguments.ElementAtOrDefault(argumentIndex);
if (argument != null) {
var argumentExpression = argument();
AddCodeTemplateExpression(argumentExpression, comma, codeTemplateExpression);
}
}
}
prevIndex = match.Index + match.Length;
}
if (prevIndex < codeTemplate.Length) {
string last = codeTemplate.Substring(prevIndex);
codeTemplateExpression.Expressions.Add(last);
}
return codeTemplateExpression;
}
private void AddExportEnum(ITypeSymbol enumType) {
generator_.AddExportEnum(enumType);
}
private bool IsPropertyField(IPropertySymbol symbol) {
return generator_.IsPropertyField(symbol);
}
private bool IsEventFiled(IEventSymbol symbol) {
return generator_.IsEventFiled(symbol);
}
private bool IsPropertyFieldOrEventFiled(ISymbol symbol) {
return generator_.IsPropertyFieldOrEventFiled(symbol);
}
private bool IsMoreThanLocalVariables(ISymbol symbol) {
return generator_.IsMoreThanLocalVariables(symbol);
}
private bool IsInternalMember(SyntaxNode node, ISymbol symbol) {
if (symbol.IsFromCode()) {
bool isVirtual = symbol.IsOverridable() && !generator_.IsSealed(symbol.ContainingType);
if (!isVirtual) {
var typeSymbol = CurTypeSymbol;
if (typeSymbol.IsContainsInternalSymbol(symbol) && !IsMoreThanLocalVariables(symbol) && !IsMoreThanUpvalues(symbol)) {
return true;
}
}
}
return false;
}
private LuaExpressionSyntax BuildArray(ITypeSymbol elementType, params LuaExpressionSyntax[] elements) {
var baseType = GetTypeName(elementType);
var arrayType = new LuaInvocationExpressionSyntax(LuaIdentifierNameSyntax.Array, baseType);
return BuildArray(arrayType, elements);
}
private LuaExpressionSyntax BuildArray(LuaExpressionSyntax arrayType, IList<LuaExpressionSyntax> elements) {
if (elements.Count > kMaxArrayInitializerCount) {
return new LuaInvocationExpressionSyntax(
new LuaMemberAccessExpressionSyntax(arrayType, LuaIdentifierNameSyntax.New, true),
elements.Count,
new LuaTableExpression(elements) { IsSingleLine = true }
);
} else {
return new LuaInvocationExpressionSyntax(arrayType, elements);
}
}
private LuaExpressionSyntax BuildArray(LuaExpressionSyntax arrayType, LuaExpressionSyntax size) {
return new LuaInvocationExpressionSyntax(new LuaMemberAccessExpressionSyntax(arrayType, LuaIdentifierNameSyntax.New, true), size);
}
private LuaExpressionSyntax BuildMultiArray(LuaExpressionSyntax arrayType, LuaExpressionSyntax rank, List<LuaExpressionSyntax> elements = null) {
var invocation = new LuaInvocationExpressionSyntax(arrayType, rank);
if (elements != null) {
invocation.AddArgument(new LuaTableExpression(elements) { IsSingleLine = true });
}
return invocation;
}
private LuaLiteralExpressionSyntax GetLiteralExpression(object constantValue) {
if (constantValue != null) {
var code = Type.GetTypeCode(constantValue.GetType());
switch (code) {
case TypeCode.Char: {
return new LuaCharacterLiteralExpression((char)constantValue);
}
case TypeCode.String: {
return BuildStringLiteralExpression((string)constantValue);
}
case TypeCode.Boolean: {
bool v = (bool)constantValue;
return v ? LuaIdentifierLiteralExpressionSyntax.True : LuaIdentifierLiteralExpressionSyntax.False;
}
case TypeCode.Single: {
float v = (float)constantValue;
return (LuaFloatLiteralExpressionSyntax)v;
}
case TypeCode.Double: {
double v = (double)constantValue;
return (LuaDoubleLiteralExpressionSyntax)v;
}
default: {
return new LuaIdentifierLiteralExpressionSyntax(constantValue.ToString());
}
}
} else {
return LuaIdentifierLiteralExpressionSyntax.Nil;
}
}
private LuaLiteralExpressionSyntax GetConstLiteralExpression(IFieldSymbol constField) {
Contract.Assert(constField.HasConstantValue);
if (constField.Type.SpecialType == SpecialType.System_Char) {
return new LuaCharacterLiteralExpression((char)constField.ConstantValue);
} else {
var literalExpression = GetLiteralExpression(constField.ConstantValue);
string identifierToken = constField.ContainingType.Name + '.' + constField.Name;
return new LuaConstLiteralExpression(literalExpression, identifierToken);
}
}
private LuaLiteralExpressionSyntax GetConstLiteralExpression(ILocalSymbol constLocal) {
Contract.Assert(constLocal.HasConstantValue);
if (constLocal.Type.SpecialType == SpecialType.System_Char) {
return new LuaCharacterLiteralExpression((char)constLocal.ConstantValue);
} else {
var literalExpression = GetLiteralExpression(constLocal.ConstantValue);
string identifierToken = constLocal.Name;
return new LuaConstLiteralExpression(literalExpression, identifierToken);
}
}
private LuaLiteralExpressionSyntax GetConstExpression(ExpressionSyntax node) {
var constValue = semanticModel_.GetConstantValue(node);
if (constValue.HasValue) {
if (constValue.Value is double d) {
switch (d) {
case double.NegativeInfinity:
case double.PositiveInfinity:
case double.NaN:
return null;
}
} else if (constValue.Value is float f) {
switch (f) {
case float.NegativeInfinity:
case float.PositiveInfinity:
case float.NaN:
return null;
}
}
var literalExpression = GetLiteralExpression(constValue.Value);
return new LuaConstLiteralExpression(literalExpression, node.ToString());
}
return null;
}
private string DecodeUnicodeCharacter(string text) {
if (unicodeRegex_.IsMatch(text)) {
if (generator_.Setting.IsClassic) {
return unicodeRegex_.Replace(text, m => {
if (short.TryParse(m.Groups[1].Value, NumberStyles.HexNumber, CultureInfo.InvariantCulture, out var c)) {
char ch = (char)c;
switch (ch) {
case '\a': {
return "\\a";
}
case '\b': {
return "\\b";
}
case '\f': {
return "\\f";
}
case '\n': {
return "\\n";
}
case '\r': {
return "\\r";
}
case '\t': {
return "\\t";
}
case '\v': {
return "\\v";
}
case '\\': {
return "\\";
}
case '"': {
return "\\\"";
}
}
return ch.ToString();
}
return m.Value;
});
} else {
return unicodeRegex_.Replace(text, m => {
return $@"\u{{{m.Groups[1].Value}}}";
});
}
}
return text;
}
private LuaLiteralExpressionSyntax BuildStringLiteralTokenExpression(SyntaxToken token) {
if (token.Text[0] == '@') {
return BuildVerbatimStringExpression(token.ValueText);
} else {
return new LuaIdentifierLiteralExpressionSyntax(DecodeUnicodeCharacter(token.Text));
}
}
private LuaIdentifierLiteralExpressionSyntax BuildStringLiteralExpression(string value) {
string text = SyntaxFactory.Literal(value).Text;
return new LuaIdentifierLiteralExpressionSyntax(text);
}
private LuaVerbatimStringLiteralExpressionSyntax BuildVerbatimStringExpression(string value) {
return new LuaVerbatimStringLiteralExpressionSyntax(value);
}
private enum CallerAttributeKind {
None,
Line,
Member,
FilePath,
}
private CallerAttributeKind GetCallerAttributeKind(INamedTypeSymbol symbol) {
switch (symbol.Name) {
case "CallerLineNumberAttribute": {
if (symbol.ContainingNamespace.IsRuntimeCompilerServices()) {
return CallerAttributeKind.Line;
}
break;
}
case "CallerMemberNameAttribute": {
if (symbol.ContainingNamespace.IsRuntimeCompilerServices()) {
return CallerAttributeKind.Member;
}
break;
}
case "CallerFilePathAttribute": {
if (symbol.ContainingNamespace.IsRuntimeCompilerServices()) {
return CallerAttributeKind.FilePath;
}
break;
}
}
return CallerAttributeKind.None;
}
private CallerAttributeKind GetCallerAttributeKind(IParameterSymbol parameter) {
foreach (var attribute in parameter.GetAttributes()) {
var callerKind = GetCallerAttributeKind(attribute.AttributeClass);
if (callerKind != CallerAttributeKind.None) {
return callerKind;
}
}
return CallerAttributeKind.None;
}
private LuaExpressionSyntax CheckCallerAttribute(IParameterSymbol parameter, SyntaxNode node) {
var kind = GetCallerAttributeKind(parameter);
switch (kind) {
case CallerAttributeKind.Line: {
var lineSpan = node.SyntaxTree.GetLineSpan(node.Span);
return lineSpan.StartLinePosition.Line + 1;
}
case CallerAttributeKind.Member: {
var parentMethod = (MethodDeclarationSyntax)FindParent(node, SyntaxKind.MethodDeclaration);
return new LuaStringLiteralExpressionSyntax(parentMethod.Identifier.ValueText);
}
case CallerAttributeKind.FilePath: {
return BuildStringLiteralExpression(generator_.RemoveBaseFolder(node.SyntaxTree.FilePath));
}
default:
return null;
}
}
private bool CheckUsingStaticNameSyntax(ISymbol symbol, NameSyntax node, LuaExpressionSyntax expression, out LuaMemberAccessExpressionSyntax outExpression) {
bool isUsingStaticName = false;
if (node.Parent.IsKind(SyntaxKind.SimpleMemberAccessExpression)) {
var memberAccess = (MemberAccessExpressionSyntax)node.Parent;
if (memberAccess.Expression == node) {
isUsingStaticName = true;
}
} else {
isUsingStaticName = true;
}
if (isUsingStaticName) {
if (!CurTypeSymbol.IsContainsInternalSymbol(symbol)) {
var usingStaticType = GetTypeName(symbol.ContainingType);
outExpression = new LuaMemberAccessExpressionSyntax(usingStaticType, expression);
return true;
}
}
outExpression = null;
return false;
}
private bool MayBeFalse(ExpressionSyntax expression, ITypeSymbol type) {
bool mayBeFalse = false;
if (type.IsValueType) {
if (type.SpecialType == SpecialType.System_Boolean) {
var constValue = semanticModel_.GetConstantValue(expression);
if (constValue.HasValue && (bool)constValue.Value) {
mayBeFalse = false;
} else {
mayBeFalse = true;
}
}
}
return mayBeFalse;
}
private bool MayBeNull(ExpressionSyntax expression, ITypeSymbol type) {
if (expression.IsKind(SyntaxKind.ObjectInitializerExpression)) {
return false;
}
Contract.Assert(type != null);
bool mayBeNull;
if (type.IsValueType) {
mayBeNull = false;
} else if (type.IsStringType()) {
var constValue = semanticModel_.GetConstantValue(expression);
if (constValue.HasValue) {
mayBeNull = false;
} else {
if (expression.IsKind(SyntaxKind.InvocationExpression)) {
var invocation = (InvocationExpressionSyntax)expression;
if (invocation.Expression.IsKind(SyntaxKind.SimpleMemberAccessExpression)) {
var memberAccess = (MemberAccessExpressionSyntax)invocation.Expression;
if (memberAccess.Name.Identifier.ValueText == LuaIdentifierNameSyntax.ToStr.ValueText) {
var typeInfo = semanticModel_.GetTypeInfo(memberAccess.Expression).Type;
if (typeInfo.SpecialType > SpecialType.System_Object) {
return false;
}
}
}
} else if (expression.IsKind(SyntaxKind.SimpleMemberAccessExpression)) {
var memberAccess = (MemberAccessExpressionSyntax)expression;
var typeInfo = semanticModel_.GetTypeInfo(memberAccess.Expression).Type;
if (typeInfo.SpecialType > SpecialType.System_Object) {
return false;
}
}
mayBeNull = true;
}
} else {
switch (expression.Kind()) {
case SyntaxKind.ObjectCreationExpression:
case SyntaxKind.ArrayCreationExpression: {
mayBeNull = false;
break;
}
default: {
mayBeNull = true;
break;
}
}
}
return mayBeNull;
}
private bool MayBeNullOrFalse(ExpressionSyntax conditionalWhenTrue) {
if (conditionalWhenTrue.IsKind(SyntaxKind.NullLiteralExpression)) {
return true;
}
var type = semanticModel_.GetTypeInfo(conditionalWhenTrue).Type;
return MayBeNull(conditionalWhenTrue, type) || MayBeFalse(conditionalWhenTrue, type);
}
private bool IsLocalVarExistsInCurMethod(string name) {
var methodInfo = CurMethodInfoOrNull;
if (methodInfo != null) {
var syntaxReference = methodInfo.Symbol.DeclaringSyntaxReferences.First();
var root = syntaxReference.GetSyntax();
if (IsLocalVarExists(name, root)) {
return true;
}
}
return false;
}
private bool IsCurMethodTypeArgument(ITypeSymbol symbol) {
var method = CurMethodInfoOrNull;
if (method != null && method.Symbol.TypeArguments.Length > 0) {
bool isMethodTypeArgument = method.Symbol.TypeArguments.Any(i => symbol.IsTypeParameterExists(i));
if (isMethodTypeArgument) {
return true;
}
}
return false;
}
private bool IsImportTypeNameEnale(INamedTypeSymbol symbol) {
if (symbol.IsGenericType) {
if (symbol.IsTypeParameterExists() && !IsCurMethodTypeArgument(symbol)) {
return false;
}
return true;
}
return true;
}
private void ShortNewPrefix(ref string newPrefix) {
List<string> names = new List<string>();
int begin = 0;
while (begin < newPrefix.Length) {
int index = begin + 1;
int pos = newPrefix.FindIndex(index, char.IsUpper);
if (pos != -1) {
names.Add(newPrefix.Substring(begin, pos - index));
begin = pos;
} else {
names.Add(newPrefix.Substring(begin));
break;
}
}
if (names.Count > 2) {
if (names.Count == 3) {
newPrefix = names.First() + names.Last();
} else {
newPrefix = names.First() + names[names.Count - 2] + names.Last();
}
}
}
private void CheckNewPrefix(ref string newPrefix, string prefix) {
const int kMaxNameLength = 25;
if (newPrefix.Length > kMaxNameLength) {
string[] names = prefix.Split('.');
if (names.Length > 2) {
string head = names.First();
string tail = names.Last();
string newName = head + tail;
if (newName.Length > kMaxNameLength) {
newName = tail;
}
if (!CurCompilationUnit.UsingDeclares.Exists(i => i.Prefix == newName)) {
newPrefix = newName;
}
}
}
}
private bool IsMoreThanUpvalues(object nameStringOrSymbol) {
if (IsLuaNewest) {
return false;
}
const int kMaxCountUpvalues = LuaSyntaxNode.kUpvaluesMaxCount - 2;
var current = CurFunctionOrNull;
if (current != null) {
var upvaluse = functionUpValues_.GetOrDefault(current);
if (upvaluse != null) {
if (!upvaluse.Contains(nameStringOrSymbol)) {
if (upvaluse.Count >= kMaxCountUpvalues) {
return true;
}
upvaluse.Add(nameStringOrSymbol);
}
} else {
upvaluse = new FunctionUpValuesInfo();
functionUpValues_.Add(current, upvaluse);
upvaluse.Add(nameStringOrSymbol);
}
}
return false;
}
private bool IsImportFunctionUpvaluesMax {
get {
const int kMaxCountUpvalues = LuaSyntaxNode.kUpvaluesMaxCount - 1; // System
int usingDeclaresCount = CurCompilationUnit.UsingDeclares.Count(i => i.IsFromCode);
var genericDeclaresCount = CurCompilationUnit.GenericUsingDeclares.Count(i => i.IsFromCode);
return usingDeclaresCount + genericDeclaresCount >= kMaxCountUpvalues;
}
}
private bool AddImport(string prefix, string newPrefix, bool isFromCode) {
if (CurCompilationUnit.UsingDeclares.Exists(i => i.Prefix == prefix)) {
if (!IsLuaNewest && IsMoreThanUpvalues(newPrefix)) {
return false;
}
return true;
}
if (!IsLuaNewest) {
if (IsImportFunctionUpvaluesMax) {
return false;
}
if (IsMoreThanUpvalues(newPrefix)) {
return false;
}
}
CurCompilationUnit.UsingDeclares.Add(new UsingDeclare() {
Prefix = prefix,
NewPrefix = newPrefix,
IsFromCode = isFromCode,
});
return true;
}
internal void ImportTypeName(ref string name, INamedTypeSymbol symbol) {
if (IsImportTypeNameEnale(symbol)) {
int pos = name.LastIndexOf('.');
if (pos != -1) {
string prefix = name.Substring(0, pos);
if (prefix != LuaIdentifierNameSyntax.System.ValueText && prefix != LuaIdentifierNameSyntax.Class.ValueText) {
string newPrefix = prefix.Replace(".", "");
CheckNewPrefix(ref newPrefix, prefix);
if (!IsLocalVarExistsInCurMethod(newPrefix)) {
bool success = AddImport(prefix, newPrefix, symbol.IsFromCode());
if (success) {
name = newPrefix + name.Substring(pos);
}
}
}
}
}
}
internal bool AddGenericImport(LuaInvocationExpressionSyntax invocationExpression, string name, List<string> argumentTypeNames, bool isFromCode) {
if (CurCompilationUnit.GenericUsingDeclares.Exists(i => i.NewName == name)) {
if (!IsLuaNewest && IsMoreThanUpvalues(name)) {
return false;
}
return true;
}
if (!IsLuaNewest) {
if (IsImportFunctionUpvaluesMax) {
return false;
}
if (IsMoreThanUpvalues(name)) {
return false;
}
}
CurCompilationUnit.GenericUsingDeclares.Add(new GenericUsingDeclare() {
InvocationExpression = invocationExpression,
ArgumentTypeNames = argumentTypeNames,
NewName = name,
IsFromCode = isFromCode
});
return true;
}
internal void ImportGenericTypeName(ref LuaExpressionSyntax luaExpression, ITypeSymbol symbol) {
if (!IsNoImportTypeName && !CurTypeSymbol.Equals(symbol) && !IsCurMethodTypeArgument(symbol)) {
var invocationExpression = (LuaInvocationExpressionSyntax)luaExpression;
string newName = GetGenericTypeImportName(invocationExpression, out var argumentTypeNames);
if (!IsLocalVarExistsInCurMethod(newName)) {
bool success;
if (!symbol.IsTypeParameterExists()) {
success = AddGenericImport(invocationExpression, newName, argumentTypeNames, symbol.IsAbsoluteFromCode());
} else {
success = CurTypeDeclaration.TypeDeclaration.AddGenericImport(invocationExpression, newName, argumentTypeNames, symbol.IsAbsoluteFromCode());
}
if (success) {
luaExpression = newName;
}
}
}
}
private static void FillGenericTypeImportName(StringBuilder sb, List<string> argumentTypeNames, LuaInvocationExpressionSyntax invocationExpression) {
string CheckLastName(string lastName) {
return lastName == "Dictionary" ? "Dict" : lastName;
}
var identifierName = (LuaIdentifierNameSyntax)invocationExpression.Expression;
sb.Append(CheckLastName(identifierName.ValueText.LastName()));
foreach (var argument in invocationExpression.ArgumentList.Arguments) {
if (argument.Expression is LuaIdentifierNameSyntax typeName) {
string argumentTypeName = typeName.ValueText;
sb.Append(CheckLastName(argumentTypeName.LastName()));
argumentTypeNames.Add(argumentTypeName);
} else {
FillGenericTypeImportName(sb, argumentTypeNames, (LuaInvocationExpressionSyntax)argument.Expression);
}
}
}
private static string GetGenericTypeImportName(LuaInvocationExpressionSyntax invocationExpression, out List<string> argumentTypeNames) {
StringBuilder sb = new StringBuilder();
argumentTypeNames = new List<string>();
FillGenericTypeImportName(sb, argumentTypeNames, invocationExpression);
return sb.ToString();
}
private LuaIdentifierNameSyntax GetTypeShortName(ISymbol symbol) {
return generator_.GetTypeShortName(symbol, this);
}
private LuaExpressionSyntax GetTypeName(ISymbol symbol) {
return generator_.GetTypeName(symbol, this);
}
private LuaExpressionSyntax GetTypeNameWithoutImport(ISymbol symbol) {
++noImportTypeNameCounter_;
var name = GetTypeName(symbol);
--noImportTypeNameCounter_;
return name;
}
private LuaExpressionSyntax GetTypeNameOfMetadata(ISymbol symbol) {
++metadataTypeNameCounter_;
var name = GetTypeNameWithoutImport(symbol);
--metadataTypeNameCounter_;
return name;
}
private LuaExpressionSyntax BuildFieldOrPropertyMemberAccessExpression(LuaExpressionSyntax expression, LuaExpressionSyntax name, bool isStatic) {
if (name is LuaPropertyAdapterExpressionSyntax propertyMethod) {
var arguments = propertyMethod.ArgumentList.Arguments;
if (arguments.Count == 1) {
if (arguments[0].Expression == LuaIdentifierNameSyntax.This) {
propertyMethod.ArgumentList.Arguments[0] = new LuaArgumentSyntax(expression);
}