public bool CreateModule(CompilerContext context, ProgramUnit programUnit, out Module module)
{
bool failed = false;
module = new Module();
foreach (MethodDefinition methodDef in programUnit.Methods)
{
MethodInfo methodInfo = null;
TypeDefinition type = null;
List<TypeDefinition> parameterTypes = new List<TypeDefinition>();
foreach (var paramDecl in methodDef.Parameters)
{
TypeDefinition paramType = null;
if (!this.TryResolveTypeReference(context, paramDecl.Type, out paramType))
{
return false;
}
foreach (string paramName in paramDecl.ParameterNames)
{
parameterTypes.Add(paramType);
}
}
if (!context.TryFindMethodAndType(
methodDef.MethodNameReference,
parameterTypes,
out type,
out methodInfo))
{
string message = string.Format(
Properties.Resources.CodeGenerator_UndeclaredMethod,
methodDef.MethodNameReference);
this.log.Write(new Message(
methodDef.Start.Path,
methodDef.Start.Line,
methodDef.Start.Column,
Severity.Error,
message));
failed = true;
continue;
}
MethodImpl methodImpl = new MethodImpl(module);
methodImpl.Method = methodInfo;
if (this.TryImplementMethod(methodImpl, context, methodDef, type))
{
module.CodeSegment.Add(methodImpl);
}
else
{
failed = true;
}
}
return !failed;
}
public bool TryParse(
TokenReader reader,
out ProgramUnit result)
{
result = null;
Token tok = reader.Peek();
ProgramUnit programUnit = new ProgramUnit(tok);
if (tok.Is(Keyword.Namespace))
{
reader.Read();
string namespaceDecl = null;
if (!this.ParseFullNameDeclaration(reader, out namespaceDecl))
{
return false;
}
if (!this.Expect(reader, Keyword.SemiColon))
{
return false;
}
programUnit.Namespace = namespaceDecl;
}
tok = reader.Peek();
if (tok.Is(Keyword.Uses))
{
reader.Read();
string usesRef = null;
if (!this.ParseFullNameDeclaration(reader, out usesRef))
{
return false;
}
programUnit.AddUses(usesRef);
tok = reader.Peek();
while (tok.Is(Keyword.Comma))
{
reader.Read();
if (!this.ParseFullNameDeclaration(reader, out usesRef))
{
return false;
}
programUnit.AddUses(usesRef);
tok = reader.Peek();
}
if (!this.Expect(reader, Keyword.SemiColon))
{
return false;
}
}
tok = reader.Peek();
if (tok.Is(Keyword.Type))
{
if (!this.ParseTypeBlock(reader, programUnit))
{
return false;
}
}
tok = reader.Peek();
if (tok.Is(Keyword.Var))
{
VarBlock globalVars = null;
if (!this.ParseVarBlock(reader, true, out globalVars))
{
return false;
}
programUnit.Variables = globalVars;
}
tok = reader.Peek();
while (
tok.Is(Keyword.Function) ||
tok.Is(Keyword.Procedure) ||
tok.Is(Keyword.Constructor) ||
tok.Is(Keyword.Destructor))
{
MethodDefinition methodDef = null;
if (!this.ParseMethodDefinition(reader, out methodDef))
{
return false;
}
programUnit.AddMethod(methodDef);
if (!this.Expect(reader, Keyword.SemiColon))
{
return false;
}
tok = reader.Peek();
}
bool passed = ExpectEndOfFile(reader);
if (passed)
{
result = programUnit;
}
return passed;
}
private bool ParseTypeBlock(TokenReader reader, ProgramUnit program)
{
if (!this.Expect(reader, Keyword.Type))
{
return false;
}
IdentifierToken typeName = reader.Peek() as IdentifierToken;
while (typeName != null)
{
reader.Read();
TypeDeclaration type = null;
if (!this.Expect(reader, Keyword.Equals))
{
return false;
}
Token tok = reader.Peek();
if (tok.Is(Keyword.LeftParen))
{
if (!this.ParseEnumDeclaration(typeName, reader, out type))
{
return false;
}
}
else if (tok.Is(Keyword.Class) || tok.Is(Keyword.Static) || tok.Is(Keyword.Public))
{
if (!this.ParseClassDeclaration(typeName, reader, out type))
{
return false;
}
}
else
{
}
program.AddType(type);
if (!this.Expect(reader, Keyword.SemiColon))
{
return false;
}
typeName = reader.Peek() as IdentifierToken;
}
return true;
}
public bool CreateTypes(CompilerContext context, ProgramUnit programUnit)
{
bool failed = false;
foreach (string uses in programUnit.Uses)
{
List<string> searchDirs = new List<string>();
searchDirs.Add(System.IO.Path.GetDirectoryName(programUnit.Start.Path));
searchDirs.AddRange(context.Includes);
string headerPath = null;
foreach (string dir in searchDirs)
{
string includePath = System.IO.Path.Combine(
dir,
uses + ".th");
if (System.IO.File.Exists(includePath))
{
headerPath = includePath;
break;
}
}
if (headerPath != null && !context.AlreadyUsed(uses))
{
context.AddAlreadyUsed(uses);
ProgramUnit usedProgramUnit = null;
using (TokenReader reader = new TokenReader(headerPath, this.log))
{
Parser includeParser = new Parser(this.log);
if (includeParser.TryParse(reader, out usedProgramUnit))
{
if (!this.CreateTypes(context, usedProgramUnit))
{
failed = true;
}
}
else
{
failed = true;
}
}
}
}
context.ClearUses();
foreach (string uses in programUnit.Uses)
{
context.AddUses(uses);
}
context.Namespace = programUnit.Namespace;
foreach (TypeDeclaration typeDecl in programUnit.Types)
{
TypeDefinition typeDef = null;
if (!context.TryDeclareType(typeDecl.Name, out typeDef))
{
string message = string.Format(
Properties.Resources.CodeGenerator_TypeAlreadyDeclared,
typeDecl.Name);
log.Write(new Message(
typeDecl.Start.Path,
typeDecl.Start.Line,
typeDecl.Start.Column,
Severity.Error,
message));
failed = true;
}
ClassDeclaration classDecl = typeDecl as ClassDeclaration;
if (classDecl != null)
{
typeDef.IsClass = true;
typeDef.IsPublic = classDecl.IsPublic;
typeDef.IsStaticClass = classDecl.IsStatic;
if (classDecl.BaseType != null)
{
TypeDefinition baseType = null;
if (!context.TryFindTypeByName(classDecl.BaseType, out baseType))
{
string message = string.Format(
System.Globalization.CultureInfo.CurrentCulture,
Properties.Resources.CodeGenerator_UndefinedType,
classDecl.BaseType);
this.log.Write(new Message(
classDecl.Start.Path,
classDecl.Start.Line,
classDecl.Start.Column,
Severity.Error,
message));
failed = true;
}
else
{
if (!baseType.IsClass || baseType.IsStaticClass)
{
string message = string.Format(
System.Globalization.CultureInfo.CurrentCulture,
Properties.Resources.CodeGenerator_BaseTypeNotClass,
baseType.FullName);
this.log.Write(new Message(
classDecl.Start.Path,
classDecl.Start.Line,
classDecl.Start.Column,
Severity.Error,
message));
failed = true;
}
else
{
typeDef.BaseClass = baseType;
}
}
}
bool hasVirtualMethods = false;
foreach (MethodDeclaration meth in classDecl.PublicMethods)
{
MethodInfo methodInfo = null;
if (!this.TryCreateMethod(context, typeDef, meth, out methodInfo))
{
failed = true;
continue;
}
methodInfo.IsPublic = true;
typeDef.Methods.Add(methodInfo);
if (methodInfo.IsVirtual)
{
hasVirtualMethods = true;
}
}
foreach (MethodDeclaration meth in classDecl.ProtectedMethods)
{
MethodInfo methodInfo = null;
if (!this.TryCreateMethod(context, typeDef, meth, out methodInfo))
{
failed = true;
continue;
}
methodInfo.IsProtected = true;
typeDef.Methods.Add(methodInfo);
if (methodInfo.IsVirtual)
{
hasVirtualMethods = true;
}
}
foreach (MethodDeclaration meth in classDecl.PrivateMethods)
{
MethodInfo methodInfo = null;
if (!this.TryCreateMethod(context, typeDef, meth, out methodInfo))
{
failed = true;
continue;
}
methodInfo.IsProtected = true;
typeDef.Methods.Add(methodInfo);
if (methodInfo.IsVirtual)
{
hasVirtualMethods = true;
}
}
int size = 0;
if (typeDef.BaseClass != null)
{
size = typeDef.BaseClass.Size;
}
if (hasVirtualMethods)
{
FieldInfo vtblPtr = typeDef.GetVTablePointer();
if (vtblPtr == null)
{
vtblPtr = typeDef.AddVTablePointer(context, size);
size += vtblPtr.Type.Size;
}
}
if (classDecl.Fields != null)
{
foreach (var field in classDecl.Fields.Variables)
{
TypeDefinition fieldType = null;
if (!this.TryResolveTypeReference(context, field.Type, out fieldType))
{
failed = true;
continue;
}
foreach (string identifier in field.VariableNames)
{
FieldInfo fieldInfo = new FieldInfo();
fieldInfo.Name = identifier;
fieldInfo.Type = fieldType;
fieldInfo.IsStatic = classDecl.IsStatic;
if (!fieldInfo.IsStatic)
{
fieldInfo.Offset = size;
size += fieldType.Size;
}
typeDef.Fields.Add(fieldInfo);
}
}
}
typeDef.Size = size;
}
}
return !failed;
}