/
dclass.d
1932 lines (1719 loc) · 62.8 KB
/
dclass.d
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// Compiler implementation of the D programming language
// Copyright (c) 1999-2015 by Digital Mars
// All Rights Reserved
// written by Walter Bright
// http://www.digitalmars.com
// Distributed under the Boost Software License, Version 1.0.
// http://www.boost.org/LICENSE_1_0.txt
module ddmd.dclass;
import core.stdc.stdio;
import core.stdc.string;
import ddmd.aggregate;
import ddmd.arraytypes;
import ddmd.gluelayer;
import ddmd.clone;
import ddmd.declaration;
import ddmd.dmodule;
import ddmd.doc;
import ddmd.dscope;
import ddmd.dsymbol;
import ddmd.dtemplate;
import ddmd.errors;
import ddmd.func;
import ddmd.globals;
import ddmd.hdrgen;
import ddmd.id;
import ddmd.identifier;
import ddmd.mtype;
import ddmd.objc;
import ddmd.root.outbuffer;
import ddmd.root.rmem;
import ddmd.root.rootobject;
import ddmd.statement;
import ddmd.target;
import ddmd.visitor;
/***********************************************************
*/
struct BaseClass
{
Type type; // (before semantic processing)
Prot protection; // protection for the base interface
ClassDeclaration sym;
uint offset; // 'this' pointer offset
// for interfaces: Array of FuncDeclaration's making up the vtbl[]
FuncDeclarations vtbl;
// if BaseClass is an interface, these
// are a copy of the InterfaceDeclaration.interfaces
BaseClass[] baseInterfaces;
extern (D) this(Type type, Prot protection)
{
//printf("BaseClass(this = %p, '%s')\n", this, type.toChars());
this.type = type;
this.protection = protection;
}
/****************************************
* Fill in vtbl[] for base class based on member functions of class cd.
* Input:
* vtbl if !=NULL, fill it in
* newinstance !=0 means all entries must be filled in by members
* of cd, not members of any base classes of cd.
* Returns:
* true if any entries were filled in by members of cd (not exclusively
* by base classes)
*/
extern (C++) bool fillVtbl(ClassDeclaration cd, FuncDeclarations* vtbl, int newinstance)
{
bool result = false;
//printf("BaseClass.fillVtbl(this='%s', cd='%s')\n", sym.toChars(), cd.toChars());
if (vtbl)
vtbl.setDim(sym.vtbl.dim);
// first entry is ClassInfo reference
for (size_t j = sym.vtblOffset(); j < sym.vtbl.dim; j++)
{
FuncDeclaration ifd = sym.vtbl[j].isFuncDeclaration();
FuncDeclaration fd;
TypeFunction tf;
//printf(" vtbl[%d] is '%s'\n", j, ifd ? ifd.toChars() : "null");
assert(ifd);
// Find corresponding function in this class
tf = (ifd.type.ty == Tfunction) ? cast(TypeFunction)ifd.type : null;
assert(tf); // should always be non-null
fd = cd.findFunc(ifd.ident, tf);
if (fd && !fd.isAbstract())
{
//printf(" found\n");
// Check that calling conventions match
if (fd.linkage != ifd.linkage)
fd.error("linkage doesn't match interface function");
// Check that it is current
//printf("newinstance = %d fd.toParent() = %s ifd.toParent() = %s\n",
//newinstance, fd.toParent().toChars(), ifd.toParent().toChars());
if (newinstance && fd.toParent() != cd && ifd.toParent() == sym)
cd.error("interface function '%s' is not implemented", ifd.toFullSignature());
if (fd.toParent() == cd)
result = true;
}
else
{
//printf(" not found %p\n", fd);
// BUG: should mark this class as abstract?
if (!cd.isAbstract())
cd.error("interface function '%s' is not implemented", ifd.toFullSignature());
fd = null;
}
if (vtbl)
(*vtbl)[j] = fd;
}
return result;
}
extern (C++) void copyBaseInterfaces(BaseClasses* vtblInterfaces)
{
//printf("+copyBaseInterfaces(), %s\n", sym.toChars());
// if (baseInterfaces_dim)
// return;
auto bc = cast(BaseClass*)mem.xcalloc(sym.interfaces.length, BaseClass.sizeof);
baseInterfaces = bc[0 .. sym.interfaces.length];
//printf("%s.copyBaseInterfaces()\n", sym.toChars());
for (size_t i = 0; i < baseInterfaces.length; i++)
{
BaseClass* b = &baseInterfaces[i];
BaseClass* b2 = sym.interfaces[i];
assert(b2.vtbl.dim == 0); // should not be filled yet
memcpy(b, b2, BaseClass.sizeof);
if (i) // single inheritance is i==0
vtblInterfaces.push(b); // only need for M.I.
b.copyBaseInterfaces(vtblInterfaces);
}
//printf("-copyBaseInterfaces\n");
}
}
struct ClassFlags
{
alias Type = uint;
enum Enum : int
{
isCOMclass = 0x1,
noPointers = 0x2,
hasOffTi = 0x4,
hasCtor = 0x8,
hasGetMembers = 0x10,
hasTypeInfo = 0x20,
isAbstract = 0x40,
isCPPclass = 0x80,
hasDtor = 0x100,
}
alias isCOMclass = Enum.isCOMclass;
alias noPointers = Enum.noPointers;
alias hasOffTi = Enum.hasOffTi;
alias hasCtor = Enum.hasCtor;
alias hasGetMembers = Enum.hasGetMembers;
alias hasTypeInfo = Enum.hasTypeInfo;
alias isAbstract = Enum.isAbstract;
alias isCPPclass = Enum.isCPPclass;
alias hasDtor = Enum.hasDtor;
}
/***********************************************************
*/
extern (C++) class ClassDeclaration : AggregateDeclaration
{
public:
extern (C++) __gshared
{
// Names found by reading object.d in druntime
ClassDeclaration object;
ClassDeclaration throwable;
ClassDeclaration exception;
ClassDeclaration errorException;
ClassDeclaration cpp_type_info_ptr; // Object.__cpp_type_info_ptr
}
ClassDeclaration baseClass; // NULL only if this is Object
FuncDeclaration staticCtor;
FuncDeclaration staticDtor;
Dsymbols vtbl; // Array of FuncDeclaration's making up the vtbl[]
Dsymbols vtblFinal; // More FuncDeclaration's that aren't in vtbl[]
// Array of BaseClass's; first is super, rest are Interface's
BaseClasses* baseclasses;
/* Slice of baseclasses[] that does not include baseClass
*/
BaseClass*[] interfaces;
// array of base interfaces that have their own vtbl[]
BaseClasses* vtblInterfaces;
// the ClassInfo object for this ClassDeclaration
TypeInfoClassDeclaration vclassinfo;
bool com; // true if this is a COM class (meaning it derives from IUnknown)
bool cpp; // true if this is a C++ interface
bool isscope; // true if this is a scope class
bool isabstract; // true if abstract class
int inuse; // to prevent recursive attempts
Baseok baseok; // set the progress of base classes resolving
Objc_ClassDeclaration objc;
Symbol* cpp_type_info_ptr_sym; // cached instance of class Id.cpp_type_info_ptr
final extern (D) this(Loc loc, Identifier id, BaseClasses* baseclasses, bool inObject = false)
{
super(loc, id);
static __gshared const(char)* msg = "only object.d can define this reserved class name";
if (baseclasses)
{
// Actually, this is a transfer
this.baseclasses = baseclasses;
}
else
this.baseclasses = new BaseClasses();
//printf("ClassDeclaration(%s), dim = %d\n", id.toChars(), this.baseclasses.dim);
// For forward references
type = new TypeClass(this);
if (id)
{
// Look for special class names
if (id == Id.__sizeof || id == Id.__xalignof || id == Id._mangleof)
error("illegal class name");
// BUG: What if this is the wrong TypeInfo, i.e. it is nested?
if (id.toChars()[0] == 'T')
{
if (id == Id.TypeInfo)
{
if (!inObject)
error("%s", msg);
Type.dtypeinfo = this;
}
if (id == Id.TypeInfo_Class)
{
if (!inObject)
error("%s", msg);
Type.typeinfoclass = this;
}
if (id == Id.TypeInfo_Interface)
{
if (!inObject)
error("%s", msg);
Type.typeinfointerface = this;
}
if (id == Id.TypeInfo_Struct)
{
if (!inObject)
error("%s", msg);
Type.typeinfostruct = this;
}
if (id == Id.TypeInfo_Pointer)
{
if (!inObject)
error("%s", msg);
Type.typeinfopointer = this;
}
if (id == Id.TypeInfo_Array)
{
if (!inObject)
error("%s", msg);
Type.typeinfoarray = this;
}
if (id == Id.TypeInfo_StaticArray)
{
//if (!inObject)
// Type.typeinfostaticarray.error("%s", msg);
Type.typeinfostaticarray = this;
}
if (id == Id.TypeInfo_AssociativeArray)
{
if (!inObject)
error("%s", msg);
Type.typeinfoassociativearray = this;
}
if (id == Id.TypeInfo_Enum)
{
if (!inObject)
error("%s", msg);
Type.typeinfoenum = this;
}
if (id == Id.TypeInfo_Function)
{
if (!inObject)
error("%s", msg);
Type.typeinfofunction = this;
}
if (id == Id.TypeInfo_Delegate)
{
if (!inObject)
error("%s", msg);
Type.typeinfodelegate = this;
}
if (id == Id.TypeInfo_Tuple)
{
if (!inObject)
error("%s", msg);
Type.typeinfotypelist = this;
}
if (id == Id.TypeInfo_Const)
{
if (!inObject)
error("%s", msg);
Type.typeinfoconst = this;
}
if (id == Id.TypeInfo_Invariant)
{
if (!inObject)
error("%s", msg);
Type.typeinfoinvariant = this;
}
if (id == Id.TypeInfo_Shared)
{
if (!inObject)
error("%s", msg);
Type.typeinfoshared = this;
}
if (id == Id.TypeInfo_Wild)
{
if (!inObject)
error("%s", msg);
Type.typeinfowild = this;
}
if (id == Id.TypeInfo_Vector)
{
if (!inObject)
error("%s", msg);
Type.typeinfovector = this;
}
}
if (id == Id.Object)
{
if (!inObject)
error("%s", msg);
object = this;
}
if (id == Id.Throwable)
{
if (!inObject)
error("%s", msg);
throwable = this;
}
if (id == Id.Exception)
{
if (!inObject)
error("%s", msg);
exception = this;
}
if (id == Id.Error)
{
if (!inObject)
error("%s", msg);
errorException = this;
}
if (id == Id.cpp_type_info_ptr)
{
if (!inObject)
error("%s", msg);
cpp_type_info_ptr = this;
}
}
baseok = BASEOKnone;
}
override Dsymbol syntaxCopy(Dsymbol s)
{
//printf("ClassDeclaration.syntaxCopy('%s')\n", toChars());
ClassDeclaration cd =
s ? cast(ClassDeclaration)s
: new ClassDeclaration(loc, ident, null);
cd.storage_class |= storage_class;
cd.baseclasses.setDim(this.baseclasses.dim);
for (size_t i = 0; i < cd.baseclasses.dim; i++)
{
BaseClass* b = (*this.baseclasses)[i];
auto b2 = new BaseClass(b.type.syntaxCopy(), b.protection);
(*cd.baseclasses)[i] = b2;
}
return ScopeDsymbol.syntaxCopy(cd);
}
override void semantic(Scope* sc)
{
//printf("ClassDeclaration.semantic(%s), type = %p, sizeok = %d, this = %p\n", toChars(), type, sizeok, this);
//printf("\tparent = %p, '%s'\n", sc.parent, sc.parent ? sc.parent.toChars() : "");
//printf("sc.stc = %x\n", sc.stc);
//{ static int n; if (++n == 20) *(char*)0=0; }
if (semanticRun >= PASSsemanticdone)
return;
uint dprogress_save = Module.dprogress;
int errors = global.errors;
//printf("+ClassDeclaration.semantic(%s), type = %p, sizeok = %d, this = %p\n", toChars(), type, sizeok, this);
Scope* scx = null;
if (_scope)
{
sc = _scope;
scx = _scope; // save so we don't make redundant copies
_scope = null;
}
if (!parent)
{
assert(sc.parent && (sc.func || !ident));
parent = sc.parent;
if (!ident) // if anonymous class
{
const(char)* id = "__anonclass";
ident = Identifier.generateId(id);
}
}
assert(parent && !isAnonymous());
if (this.errors)
type = Type.terror;
type = type.semantic(loc, sc);
if (type.ty == Tclass && (cast(TypeClass)type).sym != this)
{
TemplateInstance ti = (cast(TypeClass)type).sym.isInstantiated();
if (ti && isError(ti))
(cast(TypeClass)type).sym = this;
}
// Ungag errors when not speculative
Ungag ungag = ungagSpeculative();
if (semanticRun == PASSinit)
{
protection = sc.protection;
storage_class |= sc.stc;
if (storage_class & STCdeprecated)
isdeprecated = true;
if (storage_class & STCauto)
error("storage class 'auto' is invalid when declaring a class, did you mean to use 'scope'?");
if (storage_class & STCscope)
isscope = true;
if (storage_class & STCabstract)
isabstract = true;
userAttribDecl = sc.userAttribDecl;
if (sc.linkage == LINKcpp)
cpp = true;
if (sc.linkage == LINKobjc)
objc_ClassDeclaration_semantic_PASSinit_LINKobjc(this);
}
else if (symtab && !scx)
{
semanticRun = PASSsemanticdone;
return;
}
semanticRun = PASSsemantic;
if (baseok < BASEOKdone)
{
baseok = BASEOKin;
// Expand any tuples in baseclasses[]
for (size_t i = 0; i < baseclasses.dim;)
{
_scope = scx ? scx : sc.copy();
_scope.setNoFree();
BaseClass* b = (*baseclasses)[i];
//printf("+ %s [%d] b.type = %s\n", toChars(), i, b.type.toChars());
b.type = b.type.semantic(loc, sc);
//printf("- %s [%d] b.type = %s\n", toChars(), i, b.type.toChars());
_scope = null;
Type tb = b.type.toBasetype();
if (tb.ty == Ttuple)
{
TypeTuple tup = cast(TypeTuple)tb;
Prot protection = b.protection;
baseclasses.remove(i);
size_t dim = Parameter.dim(tup.arguments);
for (size_t j = 0; j < dim; j++)
{
Parameter arg = Parameter.getNth(tup.arguments, j);
b = new BaseClass(arg.type, protection);
baseclasses.insert(i + j, b);
}
}
else
i++;
}
if (baseok >= BASEOKdone)
{
//printf("%s already semantic analyzed, semanticRun = %d\n", toChars(), semanticRun);
if (semanticRun >= PASSsemanticdone)
return;
goto Lancestorsdone;
}
// See if there's a base class as first in baseclasses[]
if (baseclasses.dim)
{
BaseClass* b = (*baseclasses)[0];
Type tb = b.type.toBasetype();
TypeClass tc = (tb.ty == Tclass) ? cast(TypeClass)tb : null;
if (!tc)
{
if (b.type != Type.terror)
error("base type must be class or interface, not %s", b.type.toChars());
baseclasses.remove(0);
goto L7;
}
if (tc.sym.isDeprecated())
{
if (!isDeprecated())
{
// Deriving from deprecated class makes this one deprecated too
isdeprecated = true;
tc.checkDeprecated(loc, sc);
}
}
if (tc.sym.isInterfaceDeclaration())
goto L7;
for (ClassDeclaration cdb = tc.sym; cdb; cdb = cdb.baseClass)
{
if (cdb == this)
{
error("circular inheritance");
baseclasses.remove(0);
goto L7;
}
}
/* Bugzilla 11034: Essentially, class inheritance hierarchy
* and instance size of each classes are orthogonal information.
* Therefore, even if tc.sym.sizeof == SIZEOKnone,
* we need to set baseClass field for class covariance check.
*/
baseClass = tc.sym;
b.sym = baseClass;
if (tc.sym._scope && tc.sym.baseok < BASEOKdone)
tc.sym.semantic(null); // Try to resolve forward reference
if (tc.sym.baseok < BASEOKdone)
{
//printf("\ttry later, forward reference of base class %s\n", tc.sym.toChars());
if (tc.sym._scope)
tc.sym._scope._module.addDeferredSemantic(tc.sym);
baseok = BASEOKnone;
}
L7:
}
// Treat the remaining entries in baseclasses as interfaces
// Check for errors, handle forward references
for (size_t i = (baseClass ? 1 : 0); i < baseclasses.dim;)
{
BaseClass* b = (*baseclasses)[i];
Type tb = b.type.toBasetype();
TypeClass tc = (tb.ty == Tclass) ? cast(TypeClass)tb : null;
if (!tc || !tc.sym.isInterfaceDeclaration())
{
if (b.type != Type.terror)
error("base type must be interface, not %s", b.type.toChars());
baseclasses.remove(i);
continue;
}
// Check for duplicate interfaces
for (size_t j = (baseClass ? 1 : 0); j < i; j++)
{
BaseClass* b2 = (*baseclasses)[j];
if (b2.sym == tc.sym)
{
error("inherits from duplicate interface %s", b2.sym.toChars());
baseclasses.remove(i);
continue;
}
}
if (tc.sym.isDeprecated())
{
if (!isDeprecated())
{
// Deriving from deprecated class makes this one deprecated too
isdeprecated = true;
tc.checkDeprecated(loc, sc);
}
}
b.sym = tc.sym;
if (tc.sym._scope && tc.sym.baseok < BASEOKdone)
tc.sym.semantic(null); // Try to resolve forward reference
if (tc.sym.baseok < BASEOKdone)
{
//printf("\ttry later, forward reference of base %s\n", tc.sym.toChars());
if (tc.sym._scope)
tc.sym._scope._module.addDeferredSemantic(tc.sym);
baseok = BASEOKnone;
}
i++;
}
if (baseok == BASEOKnone)
{
// Forward referencee of one or more bases, try again later
_scope = scx ? scx : sc.copy();
_scope.setNoFree();
_scope._module.addDeferredSemantic(this);
//printf("\tL%d semantic('%s') failed due to forward references\n", __LINE__, toChars());
return;
}
baseok = BASEOKdone;
// If no base class, and this is not an Object, use Object as base class
if (!baseClass && ident != Id.Object && !cpp)
{
if (!object)
{
error("missing or corrupt object.d");
fatal();
}
Type t = object.type;
t = t.semantic(loc, sc).toBasetype();
assert(t.ty == Tclass);
TypeClass tc = cast(TypeClass)t;
auto b = new BaseClass(tc, Prot(PROTpublic));
baseclasses.shift(b);
baseClass = tc.sym;
assert(!baseClass.isInterfaceDeclaration());
b.sym = baseClass;
}
if (baseClass)
{
if (baseClass.storage_class & STCfinal)
error("cannot inherit from final class %s", baseClass.toChars());
// Inherit properties from base class
if (baseClass.isCOMclass())
com = true;
if (baseClass.isCPPclass())
cpp = true;
if (baseClass.isscope)
isscope = true;
enclosing = baseClass.enclosing;
storage_class |= baseClass.storage_class & STC_TYPECTOR;
}
interfaces = baseclasses.tdata()[(baseClass ? 1 : 0) .. baseclasses.dim];
foreach (b; interfaces)
{
// If this is an interface, and it derives from a COM interface,
// then this is a COM interface too.
if (b.sym.isCOMinterface())
com = true;
if (cpp && !b.sym.isCPPinterface())
{
.error(loc, "C++ class '%s' cannot implement D interface '%s'",
toPrettyChars(), b.sym.toPrettyChars());
}
}
interfaceSemantic(sc);
}
Lancestorsdone:
//printf("\tClassDeclaration.semantic(%s) baseok = %d\n", toChars(), baseok);
if (!members) // if opaque declaration
{
semanticRun = PASSsemanticdone;
return;
}
if (!symtab)
{
symtab = new DsymbolTable();
/* Bugzilla 12152: The semantic analysis of base classes should be finished
* before the members semantic analysis of this class, in order to determine
* vtbl in this class. However if a base class refers the member of this class,
* it can be resolved as a normal forward reference.
* Call addMember() and setScope() to make this class members visible from the base classes.
*/
for (size_t i = 0; i < members.dim; i++)
{
Dsymbol s = (*members)[i];
s.addMember(sc, this);
}
Scope* sc2 = sc.push(this);
sc2.stc &= STCsafe | STCtrusted | STCsystem;
sc2.parent = this;
sc2.inunion = 0;
if (isCOMclass())
{
if (global.params.isWindows)
sc2.linkage = LINKwindows;
else
sc2.linkage = LINKc;
}
sc2.protection = Prot(PROTpublic);
sc2.explicitProtection = 0;
sc2.structalign = STRUCTALIGN_DEFAULT;
sc2.userAttribDecl = null;
/* Set scope so if there are forward references, we still might be able to
* resolve individual members like enums.
*/
for (size_t i = 0; i < members.dim; i++)
{
Dsymbol s = (*members)[i];
//printf("[%d] setScope %s %s, sc2 = %p\n", i, s.kind(), s.toChars(), sc2);
s.setScope(sc2);
}
sc2.pop();
}
for (size_t i = 0; i < baseclasses.dim; i++)
{
BaseClass* b = (*baseclasses)[i];
Type tb = b.type.toBasetype();
assert(tb.ty == Tclass);
TypeClass tc = cast(TypeClass)tb;
if (tc.sym.semanticRun < PASSsemanticdone)
{
// Forward referencee of one or more bases, try again later
_scope = scx ? scx : sc.copy();
_scope.setNoFree();
if (tc.sym._scope)
tc.sym._scope._module.addDeferredSemantic(tc.sym);
_scope._module.addDeferredSemantic(this);
//printf("\tL%d semantic('%s') failed due to forward references\n", __LINE__, toChars());
return;
}
}
if (baseok == BASEOKdone)
{
baseok = BASEOKsemanticdone;
// initialize vtbl
if (baseClass)
{
if (cpp && baseClass.vtbl.dim == 0)
{
error("C++ base class %s needs at least one virtual function", baseClass.toChars());
}
// Copy vtbl[] from base class
vtbl.setDim(baseClass.vtbl.dim);
memcpy(vtbl.tdata(), baseClass.vtbl.tdata(), (void*).sizeof * vtbl.dim);
vthis = baseClass.vthis;
}
else
{
// No base class, so this is the root of the class hierarchy
vtbl.setDim(0);
if (vtblOffset())
vtbl.push(this); // leave room for classinfo as first member
}
/* If this is a nested class, add the hidden 'this'
* member which is a pointer to the enclosing scope.
*/
if (vthis) // if inheriting from nested class
{
// Use the base class's 'this' member
if (storage_class & STCstatic)
error("static class cannot inherit from nested class %s", baseClass.toChars());
if (toParent2() != baseClass.toParent2() &&
(!toParent2() ||
!baseClass.toParent2().getType() ||
!baseClass.toParent2().getType().isBaseOf(toParent2().getType(), null)))
{
if (toParent2())
{
error("is nested within %s, but super class %s is nested within %s",
toParent2().toChars(),
baseClass.toChars(),
baseClass.toParent2().toChars());
}
else
{
error("is not nested, but super class %s is nested within %s",
baseClass.toChars(),
baseClass.toParent2().toChars());
}
enclosing = null;
}
}
else
makeNested();
}
// it might be determined already, by AggregateDeclaration.size().
if (sizeok != SIZEOKdone)
sizeok = SIZEOKnone;
Scope* sc2 = sc.push(this);
//sc2.stc &= ~(STCfinal | STCauto | STCscope | STCstatic | STCabstract | STCdeprecated | STC_TYPECTOR | STCtls | STCgshared);
//sc2.stc |= storage_class & STC_TYPECTOR;
sc2.stc &= STCsafe | STCtrusted | STCsystem;
sc2.parent = this;
sc2.inunion = 0;
if (isCOMclass())
{
if (global.params.isWindows)
sc2.linkage = LINKwindows;
else
{
/* This enables us to use COM objects under Linux and
* work with things like XPCOM
*/
sc2.linkage = LINKc;
}
}
sc2.protection = Prot(PROTpublic);
sc2.explicitProtection = 0;
sc2.structalign = STRUCTALIGN_DEFAULT;
sc2.userAttribDecl = null;
foreach (s; *members)
{
s.importAll(sc2);
}
// Note that members.dim can grow due to tuple expansion during semantic()
for (size_t i = 0; i < members.dim; ++i)
{
auto s = (*members)[i];
s.semantic(sc2);
}
finalizeSize(sc2);
if (sizeok == SIZEOKfwd)
{
// semantic() failed due to forward references
// Unwind what we did, and defer it for later
foreach (v; fields)
{
v.offset = 0;
}
fields.setDim(0);
structsize = 0;
alignsize = 0;
sc2.pop();
_scope = scx ? scx : sc.copy();
_scope.setNoFree();
_scope._module.addDeferredSemantic(this);
Module.dprogress = dprogress_save;
//printf("\tsemantic('%s') failed due to forward references\n", toChars());
return;
}
Module.dprogress++;
semanticRun = PASSsemanticdone;
//printf("-ClassDeclaration.semantic(%s), type = %p\n", toChars(), type);
//members.print();
version (none) // FIXME
{
LafterSizeok:
// The additions of special member functions should have its own
// sub-semantic analysis pass, and have to be deferred sometimes.
// See the case in compilable/test14838.d
for (size_t i = 0; i < fields.dim; i++)
{
VarDeclaration v = fields[i];
Type tb = v.type.baseElemOf();
if (tb.ty != Tstruct)
continue;
StructDeclaration sd = (cast(TypeStruct)tb).sym;
if (sd.semanticRun >= PASSsemanticdone)
continue;
sc2.pop();
_scope = scx ? scx : sc.copy();
_scope.setNoFree();
_scope._module.addDeferredSemantic(this);
//printf("\tdeferring %s\n", toChars());
return;
}
}
/* Look for special member functions.
* They must be in this class, not in a base class.
*/
// Can be in base class
aggNew = cast(NewDeclaration)search(Loc(), Id.classNew);
aggDelete = cast(DeleteDeclaration)search(Loc(), Id.classDelete);
// this.ctor is already set
if (!ctor && noDefaultCtor)
{
// A class object is always created by constructor, so this check is legitimate.
for (size_t i = 0; i < fields.dim; i++)
{
VarDeclaration v = fields[i];
if (v.storage_class & STCnodefaultctor)
.error(v.loc, "field %s must be initialized in constructor", v.toChars());
}
}
// If this class has no constructor, but base class has a default
// ctor, create a constructor:
// this() { }
if (!ctor && baseClass && baseClass.ctor)
{
FuncDeclaration fd = resolveFuncCall(loc, sc2, baseClass.ctor, null, null, null, 1);
if (fd && !fd.errors)
{
//printf("Creating default this(){} for class %s\n", toChars());
TypeFunction btf = cast(TypeFunction)fd.type;
auto tf = new TypeFunction(null, null, 0, LINKd, fd.storage_class);
tf.purity = btf.purity;
tf.isnothrow = btf.isnothrow;
tf.isnogc = btf.isnogc;
tf.trust = btf.trust;
auto ctor = new CtorDeclaration(loc, Loc(), 0, tf);
ctor.fbody = new CompoundStatement(Loc(), new Statements());
members.push(ctor);
ctor.addMember(sc, this);
ctor.semantic(sc2);
this.ctor = ctor;
defaultCtor = ctor;
}
else
{
error("cannot implicitly generate a default ctor when base class %s is missing a default ctor",
baseClass.toPrettyChars());
}
}
dtor = buildDtor(this, sc2);
if (FuncDeclaration f = hasIdentityOpAssign(this, sc2))
{
if (!(f.storage_class & STCdisable))
error(f.loc, "identity assignment operator overload is illegal");
}
inv = buildInv(this, sc2);
sc2.pop();
if (global.errors != errors)
{
// The type is no good.
type = Type.terror;
this.errors = true;
if (deferred)
deferred.errors = true;
}
// Verify fields of a synchronized class are not public
if (storage_class & STCsynchronized)
foreach (vd; this.fields)
{
if (!vd.isThisDeclaration() &&
!vd.prot().isMoreRestrictiveThan(Prot(PROTpublic)))
{
vd.error("Field members of a synchronized class cannot be %s",