private void ParseStruct(LinkedListStream <IBaseToken> stream)
{
CppToken structKeywordToken = stream.Peek <CppToken>();
Debug.Assert(structKeywordToken.Kind == CppTokenKind.ReservedKeyword && ("struct".Equals(structKeywordToken.Value) || "union".Equals(structKeywordToken.Value)));
var typedefResult = Search(stream.CurrentNode, SearchMode.Prev, (t) => t.Kind == CppTokenKind.ReservedKeyword && "typedef".Equals(t.Value));
bool isTypedef = typedefResult != null;
stream.Next();
// There are multiple ways to define a struct in C
// A = typedef struct { int a; } foo;
// B = typedef struct foo { int a; } sFoo; (prefered style)
// C = struct { int a; }; (Anonymous struct without a name)
// D = struct { int a; } memberName; (Anonymous struct named as a member)
// E = struct foo { int a; }; (C++ style)
// B/E
var identTokenResult = Search(stream, SearchMode.Current, CppTokenKind.IdentLiteral);
if (identTokenResult != null)
{
var identToken = identTokenResult.Token;
string structIdent = identToken.Value;
stream.Next();
CppEntityKind kind = CppEntityKind.Struct;
var terminatorTokenResult = Search(stream, SearchMode.Current, CppTokenKind.Semicolon, CppTokenKind.LeftBrace);
if (terminatorTokenResult != null)
{
var terminatorToken = terminatorTokenResult.Token;
if (terminatorToken.Kind == CppTokenKind.Semicolon)
{
kind = CppEntityKind.ForwardStruct;
}
stream.Next();
}
CppEntity structEntity = new CppEntity(kind, identToken, structIdent)
{
DocumentationNode = FindDocumentationNode(identTokenResult.Node, 1),
};
CppNode structNode = new CppNode(Top, structEntity);
Add(structNode);
SymbolCache.AddSource(Tag, structIdent, new SourceSymbol(SourceSymbolKind.CppStruct, identToken.Range, structNode));
}
// @TODO(final): Parse struct members
}
private bool ParsePreprocessor(LinkedListStream <IBaseToken> stream)
{
CppToken token = stream.Peek <CppToken>();
Debug.Assert(token.Kind == CppTokenKind.PreprocessorStart);
stream.Next();
var keywordResult = Search(stream, SearchMode.Current, CppTokenKind.PreprocessorKeyword);
if (keywordResult != null)
{
var keywordToken = keywordResult.Token;
stream.Next();
if ("define".Equals(keywordResult.Token.Value))
{
var defineResult = Search(stream, SearchMode.Current, CppTokenKind.PreprocessorDefineSource);
if (defineResult != null)
{
var defineNameToken = defineResult.Token;
string defineName = defineNameToken.Value;
stream.Next();
var defineValueResult = Search(stream, SearchMode.Current, CppTokenKind.IdentLiteral);
if (defineValueResult != null)
{
stream.Next();
}
CppEntity defineKeyEntity = new CppEntity(CppEntityKind.Define, defineNameToken, defineName)
{
DocumentationNode = FindDocumentationNode(defineResult.Node, 1),
Value = defineValueResult?.Token.Value
};
CppNode defineNode = new CppNode(Top, defineKeyEntity);
Add(defineNode);
SymbolCache.AddSource(Tag, defineName, new SourceSymbol(SourceSymbolKind.CppDefine, defineNameToken.Range, defineNode));
}
else
{
AddError(keywordToken.Position, $"Processor define has no identifier!", "Define");
}
}
}
return(true);
}
private bool ParseFunction(LinkedListStream <IBaseToken> stream)
{
var functionIdentNode = stream.CurrentNode;
CppToken functionIdentToken = functionIdentNode.Value as CppToken;
Debug.Assert(functionIdentToken.Kind == CppTokenKind.IdentLiteral);
var functionName = functionIdentToken.Value;
CppTokenKind[] funcCallKinds =
{
CppTokenKind.EqOp,
CppTokenKind.Comma,
CppTokenKind.LeftParen,
CppTokenKind.AddOp,
CppTokenKind.AddAssign,
CppTokenKind.SubOp,
CppTokenKind.SubAssign,
CppTokenKind.DivOp,
CppTokenKind.DivAssign,
CppTokenKind.MulAssign,
CppTokenKind.XorOp,
CppTokenKind.XorAssign,
CppTokenKind.LeftShiftOp,
CppTokenKind.LeftShiftAssign,
CppTokenKind.RightShiftOp,
CppTokenKind.RightShiftAssign,
};
var funcCallResult = Search(stream, SearchMode.Prev, funcCallKinds);
CppEntityKind kind = CppEntityKind.FunctionCall;
// Skip ident
stream.Next();
// Skip parameters
CppToken openParenToken = stream.Peek <CppToken>();
Debug.Assert(openParenToken.Kind == CppTokenKind.LeftParen);
stream.Next();
var closeParenResult = Search(stream, SearchMode.Forward, CppTokenKind.RightParen);
if (closeParenResult == null)
{
AddError(openParenToken.Position, $"Unterminated function '{functionName}'", "Function", functionName);
return(true);
}
stream.Seek(closeParenResult.Node);
stream.Next();
if (funcCallResult == null)
{
var endingTokenResult = Search(stream, SearchMode.Current, CppTokenKind.Semicolon, CppTokenKind.LeftBrace);
if (endingTokenResult != null)
{
stream.Next();
if (endingTokenResult.Token.Kind == CppTokenKind.LeftBrace)
{
kind = CppEntityKind.FunctionBody;
if (Configuration.SkipFunctionBlocks)
{
return(true);
}
}
else
{
kind = CppEntityKind.FunctionDefinition;
}
}
}
CppEntity functionEntity = new CppEntity(kind, functionIdentToken, functionName)
{
DocumentationNode = FindDocumentationNode(functionIdentNode, 1),
};
CppNode functionNode = new CppNode(Top, functionEntity);
Add(functionNode);
if (kind == CppEntityKind.FunctionDefinition)
{
SymbolCache.AddSource(Tag, functionName, new SourceSymbol(SourceSymbolKind.CppFunctionDefinition, functionIdentToken.Range, functionNode));
}
else if (kind == CppEntityKind.FunctionBody)
{
SymbolCache.AddSource(Tag, functionName, new SourceSymbol(SourceSymbolKind.CppFunctionBody, functionIdentToken.Range, functionNode));
}
else if (Configuration.FunctionCallSymbolsEnabled)
{
SymbolCache.AddReference(Tag, functionName, new ReferenceSymbol(ReferenceSymbolKind.CppFunction, functionIdentToken.Range, functionNode));
}
return(true);
}
private void ParseTypedef(LinkedListStream <IBaseToken> stream)
{
CppToken typedefToken = stream.Peek <CppToken>();
Debug.Assert(typedefToken.Kind == CppTokenKind.ReservedKeyword && "typedef".Equals(typedefToken.Value));
stream.Next();
var reservedKeywordResult = Search(stream, SearchMode.Current, CppTokenKind.ReservedKeyword);
if (reservedKeywordResult != null)
{
var reservedKeywordToken = reservedKeywordResult.Token;
string keyword = reservedKeywordToken.Value;
switch (keyword)
{
case "union":
case "struct":
ParseStruct(stream);
return;
case "enum":
ParseEnum(stream, reservedKeywordToken.Position);
return;
}
}
// Normal typedef
CppEntityKind kind = CppEntityKind.Typedef;
var semicolonResult = Search(stream, SearchMode.Forward, CppTokenKind.Semicolon);
if (semicolonResult != null)
{
stream.Seek(semicolonResult.Node);
stream.Next();
SearchResult <CppToken> identResult = null;
var prevResult = Search(semicolonResult, SearchMode.Prev, CppTokenKind.RightParen, CppTokenKind.IdentLiteral);
if (prevResult != null)
{
if (prevResult.Token.Kind == CppTokenKind.RightParen)
{
// Function typedef
var leftParenResult = Search(prevResult, SearchMode.Backward, CppTokenKind.LeftParen);
if (leftParenResult != null)
{
var rightParentResult = Search(leftParenResult, SearchMode.Prev, CppTokenKind.RightParen);
if (rightParentResult != null)
{
leftParenResult = Search(rightParentResult, SearchMode.Backward, CppTokenKind.LeftParen);
if (leftParenResult != null)
{
identResult = Search(leftParenResult, SearchMode.Next, CppTokenKind.IdentLiteral);
kind = CppEntityKind.FunctionTypedef;
}
}
else
{
// Typedef on define
// #define MY_TYPEDEF(name)
// typedef MY_TYPEDEF(my_typedef);
//Debug.WriteLine("Right paren not found!");
}
}
}
else
{
// Type typedef
Debug.Assert(prevResult.Token.Kind == CppTokenKind.IdentLiteral);
identResult = prevResult;
}
}
if (identResult != null)
{
var identToken = identResult.Token;
string typedefIdent = identToken.Value;
CppEntity typedefEntity = new CppEntity(kind, identToken, typedefIdent)
{
DocumentationNode = FindDocumentationNode(identResult.Node, 1),
};
var typedefNode = new CppNode(Top, typedefEntity);
Add(typedefNode);
SymbolCache.AddSource(Tag, typedefIdent, new SourceSymbol(SourceSymbolKind.CppType, identToken.Range));
}
}
}
private void ParseEnum(LinkedListStream <IBaseToken> stream, TextPosition pos)
{
CppToken enumBaseToken = stream.Peek <CppToken>();
Debug.Assert(enumBaseToken.Kind == CppTokenKind.ReservedKeyword && "enum".Equals(enumBaseToken.Value));
stream.Next();
SearchResult <CppToken> enumIdentResult = null;
var classKeywordResult = Search(stream, SearchMode.Current, CppTokenKind.ReservedKeyword);
if (classKeywordResult != null)
{
string keyword = classKeywordResult.Token.Value;
if ("class".Equals(keyword))
{
// enum class
stream.Next();
enumIdentResult = Search(stream, SearchMode.Current, CppTokenKind.IdentLiteral);
if (enumIdentResult == null)
{
var token = stream.Peek <CppToken>();
AddError(pos, $"Expect identifier token, but got token kind {token?.Kind} for enum", "enum");
return;
}
}
}
if (enumIdentResult == null)
{
// Ident after enum
var identAfterEnumResult = Search(stream, SearchMode.Current, CppTokenKind.IdentLiteral);
if (identAfterEnumResult != null)
{
stream.Next();
enumIdentResult = identAfterEnumResult;
}
}
if (enumIdentResult != null)
{
var braceOrSemiResult = Search(stream, SearchMode.Current, CppTokenKind.LeftBrace, CppTokenKind.Semicolon);
if (braceOrSemiResult == null)
{
return;
}
var enumIdentToken = enumIdentResult.Token;
string enumIdent = enumIdentToken.Value;
CppEntityKind kind = braceOrSemiResult.Token.Kind == CppTokenKind.Semicolon ? CppEntityKind.ForwardEnum : CppEntityKind.Enum;
CppEntity enumRootEntity = new CppEntity(kind, enumIdentToken, enumIdent)
{
DocumentationNode = FindDocumentationNode(enumIdentResult.Node, 1),
};
CppNode enumRootNode = new CppNode(Top, enumRootEntity);
Add(enumRootNode);
SymbolCache.AddSource(Tag, enumIdent, new SourceSymbol(SourceSymbolKind.CppEnum, enumIdentToken.Range, enumRootNode));
if (braceOrSemiResult.Token.Kind == CppTokenKind.LeftBrace)
{
ParseEnumValues(stream, enumRootNode);
}
else
{
stream.Next();
}
}
else
{
var token = stream.Peek <CppToken>();
AddError(pos, $"Expect identifier token, but got token kind {token?.Kind} for enum", "enum");
return;
}
}
private void ParseEnumValues(LinkedListStream <IBaseToken> stream, CppNode rootNode)
{
CppToken leftBraceToken = stream.Peek <CppToken>();
Debug.Assert(leftBraceToken.Kind == CppTokenKind.LeftBrace);
stream.Next();
while (!stream.IsEOF)
{
var rightBraceResult = Search(stream, SearchMode.Current, CppTokenKind.RightBrace);
if (rightBraceResult != null)
{
// Enum complete
stream.Next();
break;
}
var identResult = Search(stream, SearchMode.Current, CppTokenKind.IdentLiteral);
if (identResult != null)
{
stream.Seek(identResult.Node);
// Enum value
var enumValueToken = identResult.Token;
string enumValueName = enumValueToken.Value;
stream.Next();
CppEntity enumValueEntity = new CppEntity(CppEntityKind.EnumValue, enumValueToken, enumValueName)
{
DocumentationNode = FindDocumentationNode(identResult.Node, 1),
};
CppNode enumValueNode = new CppNode(rootNode, enumValueEntity);
rootNode.AddChild(enumValueNode);
SymbolCache.AddSource(Tag, enumValueName, new SourceSymbol(SourceSymbolKind.CppMember, enumValueToken.Range, enumValueNode));
var equalsResult = Search(stream, SearchMode.Current, CppTokenKind.EqOp);
if (equalsResult != null)
{
stream.Next();
// Skip until comma or right brace
var tmpResult = Search(stream, SearchMode.Forward, CppTokenKind.Comma, CppTokenKind.RightBrace);
if (tmpResult != null)
{
stream.Seek(tmpResult.Node);
}
else
{
AddError(equalsResult.Token.Position, $"Expect assignment token, but got token '{stream.Peek()}' for enum member '{enumValueName}'", "Enum", enumValueName);
break;
}
}
var commaOrRightBraceResult = Search(stream, SearchMode.Current, CppTokenKind.Comma, CppTokenKind.RightBrace);
if (commaOrRightBraceResult != null)
{
stream.Seek(commaOrRightBraceResult.Node);
if (commaOrRightBraceResult.Token.Kind == CppTokenKind.Comma)
{
stream.Next();
}
continue;
}
else
{
var tok = stream.Peek <CppToken>();
if (tok != null)
{
AddError(tok.Position, $"Unexpected token '{tok.Kind}'", "EnumValue");
}
break;
}
}
stream.Next();
}
}