public override void Generate(ILProcessor il, SemanticEnvironment environment)
{
var list = new ExpList();
if (ExpList is ExpList expList)
{
list = expList;
}
foreach (var node in list.Nodes)
{
node.Generate(il, environment);
}
PostfixNode.Generate(il, environment);
if (PostfixNode is Id id) // Push null to stack if function return void.
{
var type = (environment.GetSymbol(id.IdName) as FuncSymbol).Type as FuncType;
if (type.ReturnType.SymbolTypeKind == SymbolTypeKind.VOID)
{
il.Emit(OpCodes.Ldnull);
}
}
else
{
throw new NotImplementedException();
}
}
public override void Generate(ref Assembly assembly, ref SemanticEnvironment environment)
{
var funcType = Type as FuncType;
var retType = funcType.ReturnType;
var methodDefinition = new MethodDefinition(Id, MethodAttributes.Public | MethodAttributes.Static,
retType.ToTypeReference(ref assembly))
{
Body = { InitLocals = true }
};
Definition = methodDefinition;
var mainModule = assembly.AssemblyDefinition.MainModule;
var writeLineInfo = typeof(Console).GetMethod("Write", new Type[] { typeof(string), typeof(object) });
var writeLineReference = mainModule.ImportReference(writeLineInfo);
var il = methodDefinition.Body.GetILProcessor();
foreach (var argument in funcType.GetArguments())
{
var parameterDefinition = new ParameterDefinition(argument.Id, ParameterAttributes.None,
argument.Type.ToTypeReference(ref assembly));
((VarSymbol)argument).ParameterDefinition = parameterDefinition;
methodDefinition.Parameters.Add(parameterDefinition);
}
il.Emit(OpCodes.Ldarg_0);
il.Emit(OpCodes.Ldarg_1);
il.Emit(OpCodes.Box, assembly.AssemblyDefinition.MainModule.TypeSystem.Int64);
il.Emit(OpCodes.Call, writeLineReference);
il.Emit(OpCodes.Ret);
assembly.AddMethod(methodDefinition);
}
public override void CheckSemantic(ref SemanticEnvironment environment)
{
foreach (var node in Nodes)
{
node.CheckSemantic(ref environment);
}
}
public override void Generate(ILProcessor il, SemanticEnvironment environment)
{
var symbol = environment.GetSymbol(IdName);
switch (symbol)
{
case VarSymbol varSymbol:
switch (varSymbol.VariableType)
{
case VarSymbol.VarType.VARIABLE:
il.Emit(OpCodes.Ldloc, varSymbol.VariableDefinition);
break;
case VarSymbol.VarType.PARAMETER:
il.Emit(OpCodes.Ldarg, varSymbol.ParameterDefinition);
break;
default:
throw new ArgumentOutOfRangeException();
}
break;
case FuncSymbol funcSymbol:
il.Emit(OpCodes.Call, funcSymbol.Definition);
break;
}
}
public override void Generate(ILProcessor il, SemanticEnvironment environment)
{
if (!(ExpNode is ExpNode expNode))
{
return;
}
expNode.Generate(il, environment);
il.Emit(OpCodes.Pop);
}
public override void CheckSemantic(ref SemanticEnvironment environment)
{
var type = DeclSpecs.NodeToType(DeclSpec, ref environment);
foreach (var node in InitDeclaratorList.Nodes)
{
environment.GetCurrentSnapshot()
.PushSymbol((node as InitDeclarator).ParseSymbolByType(type, ref environment));
}
}
public override void Generate(ILProcessor il, SemanticEnvironment environment)
{
switch (UnaryOperator.Operator.Type)
{
case OperatorType.MULT:
UnaryExpNode.Generate(il, environment);
if (UnaryExpNode.GetType(ref environment) is PointerType {
PointerToType : StructType structType
})
{
il.Emit(OpCodes.Ldobj, structType.TypeReference);
}
public Symbol ParseSymbol(SymbolType type, ref SemanticEnvironment environment)
{
if (Pointer is Pointer pointer)
{
type = pointer.ParseType(type, ref environment);
}
return(DirectDeclarator switch
{
Id id => new VarSymbol(id.IdName, type, id.StartNodePosition),
Declarator declarator => declarator.ParseSymbol(type, ref environment),
GenericDeclaration genericDeclaration => genericDeclaration.ParseSymbol(type, ref environment),
_ => throw new ArgumentException()
});
public override Symbol ParseSymbolByType(SymbolType type, ref SemanticEnvironment environment)
{
var symbol = Declarator.ParseSymbol(type, ref environment) as VarSymbol;
var valueType = Initializer.GetType(ref environment);
symbol.Initializer = Initializer;
if (symbol.Type.Equals(valueType))
{
return(symbol);
}
throw new SemanticException(
$"trying to assign to variable of type {symbol.Type.GetShortName()} value with type " +
$"{valueType.GetShortName()}",
Initializer.StartNodePosition);
}
public override void Generate(ILProcessor il, SemanticEnvironment environment)
{
PostfixNode.Generate(il, environment);
StructType structType;
if (TypeOfCall == CallType.VALUE)
{
structType = PostfixNode.GetType(ref environment) as StructType;
}
else
{
structType = (PostfixNode.GetType(ref environment) as PointerType).PointerToType as StructType;
}
var id = Id as Id;
var member = structType.Members.Get(id.IdName) as VarSymbol;
il.Emit(OpCodes.Ldfld, member.FieldDefinition);
}
public override void Generate(ILProcessor il, SemanticEnvironment environment)
{
switch (Token.TokenType)
{
case TokenType.INT:
il.Emit(OpCodes.Ldc_I8, (long)Token.Value);
break;
case TokenType.FLOAT:
il.Emit(OpCodes.Ldc_R8, (double)Token.Value);
break;
case TokenType.CHAR:
il.Emit(OpCodes.Ldc_I8, (long)Token.Value);
break;
default:
throw new ArgumentOutOfRangeException();
}
}
public override void Generate(ILProcessor il, SemanticEnvironment environment) => il.Emit(OpCodes.Ldstr, Utils.ConvertCFormatToCsFormat(Str));
public virtual Symbol ParseSymbolByType(SymbolType type, ref SemanticEnvironment environment) => Declarator.ParseSymbol(type, ref environment);
private static void Main(string[] args)
{
if (args.Length == 0)
{
// TODO Display help info.
return;
}
try
{
var tokenizer = new Tokenizer.Tokenizer(args[0]);
if (args.Contains("-l"))
{
var token = tokenizer.Get();
while (token.TokenType != TokenType.EOF)
{
Console.WriteLine(token);
token = tokenizer.Get();
}
}
if (args.Contains("-p"))
{
var parser = new SyntaxParser(tokenizer, SyntaxParserType.EXP);
Console.WriteLine(parser.SyntaxTree);
}
if (args.Contains("-ps"))
{
var parser = new SyntaxParser(tokenizer, SyntaxParserType.STAT);
Console.WriteLine(parser.SyntaxTree);
}
if (args.Contains("-pu"))
{
var parser = new SyntaxParser(tokenizer, SyntaxParserType.UNIT);
Console.WriteLine(parser.SyntaxTree);
}
if (args.Contains("-s"))
{
var parser = new SyntaxParser(tokenizer, SyntaxParserType.UNIT);
var syntaxTree = parser.SyntaxTree;
var environment = new SemanticEnvironment();
syntaxTree.CheckSemantic(ref environment);
Console.WriteLine(syntaxTree);
Console.WriteLine(environment.PopSnapshot());
}
if (args.Contains("-net"))
{
var parser = new SyntaxParser(tokenizer, SyntaxParserType.UNIT);
var syntaxTree = parser.SyntaxTree;
var parserEnvironment = new SemanticEnvironment();
syntaxTree.CheckSemantic(ref parserEnvironment);
var fileName = new FileInfo(args[0]);
var assembly = new Assembly(fileName.Name.Replace(".c", ""));
var unitSnapshot = parserEnvironment.PopSnapshot();
var generatorEnvironment = new SemanticEnvironment();
generatorEnvironment.PushSnapshot(unitSnapshot);
foreach (var structType in unitSnapshot.StructTable.GetData())
{
structType.Value.Generate(ref assembly, ref generatorEnvironment);
}
foreach (var symbol in unitSnapshot.SymbolTable.GetData())
{
symbol.Value.Generate(ref assembly, ref generatorEnvironment);
}
assembly.Save(fileName.DirectoryName + '\\');
}
}
catch (FileNotFoundException e)
{
Console.WriteLine($"error: file {e.FileName} not found");
}
catch (Exception e)
{
Console.WriteLine(e);
}
}
public override Symbol ParseSymbolByType(SymbolType type, ref SemanticEnvironment environment) =>
throw new NotImplementedException("initializing by InitializerList is not supported");
public static SymbolType NodeToType(Node declSpecs, ref SemanticEnvironment environment)
{
if (!(declSpecs is NullStat) && !(declSpecs is DeclSpecs))
{
throw new ArgumentException($"expected DeclSpecs, actual {declSpecs.GetType()}");
}
var storageClassSpecExist = false;
var typeSpecExist = false;
var symbolType = new SymbolType(false, false, SymbolTypeKind.INT);
while (!(declSpecs is NullStat))
{
var spec = (declSpecs as DeclSpecs).Spec;
if (spec is StorageClassSpec storageClassSpec)
{
if (storageClassSpecExist)
{
throw new SemanticException("multiple storage classes in declaration specifiers",
storageClassSpec.Token.Position);
}
storageClassSpecExist = true;
}
if (spec is TypeSpec typeSpec)
{
if (typeSpecExist)
{
throw new SemanticException("two or more data types in declaration specifiers",
typeSpec.TokenType.Position);
}
typeSpecExist = true;
switch (typeSpec.TokenType.Type)
{
case KeywordType.INT:
symbolType.SymbolTypeKind = SymbolTypeKind.INT;
break;
case KeywordType.FLOAT:
symbolType.SymbolTypeKind = SymbolTypeKind.FLOAT;
break;
case KeywordType.VOID:
symbolType.SymbolTypeKind = SymbolTypeKind.VOID;
break;
default:
throw new SemanticException("this data type is not supported",
typeSpec.TokenType.Position);
}
}
if (spec is StructSpec structSpec)
{
if (typeSpecExist)
{
throw new SemanticException("two or more data types in declaration specifiers",
structSpec.Id.StartNodePosition);
}
typeSpecExist = true;
symbolType = structSpec.ParseType(ref environment);
}
if (spec is TypeQualifier typeQualifier)
{
switch (typeQualifier.Token.Type)
{
case KeywordType.CONST:
symbolType.IsConst = true;
break;
case KeywordType.VOLATILE:
symbolType.IsVolatile = true;
break;
}
}
declSpecs = (declSpecs as DeclSpecs).NextSpec;
}
return(symbolType);
}
public override void Generate(ILProcessor il, SemanticEnvironment environment)
{
Left.Store(il, environment, Right);
Left.Generate(il, environment);
}
public virtual void CheckSemantic(ref SemanticEnvironment environment) => throw new NotImplementedException();
public new abstract SymbolType GetType(ref SemanticEnvironment environment);