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llvm-project/clang/lib/Parse/ParseObjc.cpp

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//===--- ParseObjC.cpp - Objective C Parsing ------------------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file implements the Objective-C portions of the Parser interface.
//
//===----------------------------------------------------------------------===//
#include "clang/Parse/ParseDiagnostic.h"
#include "clang/Parse/Parser.h"
#include "RAIIObjectsForParser.h"
#include "clang/Sema/DeclSpec.h"
#include "clang/Sema/PrettyDeclStackTrace.h"
#include "clang/Sema/Scope.h"
#include "llvm/ADT/SmallVector.h"
using namespace clang;
/// ParseObjCAtDirectives - Handle parts of the external-declaration production:
/// external-declaration: [C99 6.9]
/// [OBJC] objc-class-definition
/// [OBJC] objc-class-declaration
/// [OBJC] objc-alias-declaration
/// [OBJC] objc-protocol-definition
/// [OBJC] objc-method-definition
/// [OBJC] '@' 'end'
Parser::DeclGroupPtrTy Parser::ParseObjCAtDirectives() {
SourceLocation AtLoc = ConsumeToken(); // the "@"
if (Tok.is(tok::code_completion)) {
Actions.CodeCompleteObjCAtDirective(getCurScope());
cutOffParsing();
return DeclGroupPtrTy();
}
Decl *SingleDecl = 0;
switch (Tok.getObjCKeywordID()) {
case tok::objc_class:
return ParseObjCAtClassDeclaration(AtLoc);
break;
case tok::objc_interface: {
ParsedAttributes attrs(AttrFactory);
SingleDecl = ParseObjCAtInterfaceDeclaration(AtLoc, attrs);
break;
}
case tok::objc_protocol: {
ParsedAttributes attrs(AttrFactory);
SingleDecl = ParseObjCAtProtocolDeclaration(AtLoc, attrs);
break;
}
case tok::objc_implementation:
SingleDecl = ParseObjCAtImplementationDeclaration(AtLoc);
break;
case tok::objc_end:
return ParseObjCAtEndDeclaration(AtLoc);
break;
case tok::objc_compatibility_alias:
SingleDecl = ParseObjCAtAliasDeclaration(AtLoc);
break;
case tok::objc_synthesize:
SingleDecl = ParseObjCPropertySynthesize(AtLoc);
break;
case tok::objc_dynamic:
SingleDecl = ParseObjCPropertyDynamic(AtLoc);
break;
default:
Diag(AtLoc, diag::err_unexpected_at);
SkipUntil(tok::semi);
SingleDecl = 0;
break;
}
return Actions.ConvertDeclToDeclGroup(SingleDecl);
}
///
/// objc-class-declaration:
/// '@' 'class' identifier-list ';'
///
Parser::DeclGroupPtrTy
Parser::ParseObjCAtClassDeclaration(SourceLocation atLoc) {
ConsumeToken(); // the identifier "class"
SmallVector<IdentifierInfo *, 8> ClassNames;
SmallVector<SourceLocation, 8> ClassLocs;
while (1) {
if (Tok.isNot(tok::identifier)) {
Diag(Tok, diag::err_expected_ident);
SkipUntil(tok::semi);
return Actions.ConvertDeclToDeclGroup(0);
}
ClassNames.push_back(Tok.getIdentifierInfo());
ClassLocs.push_back(Tok.getLocation());
ConsumeToken();
if (Tok.isNot(tok::comma))
break;
ConsumeToken();
}
// Consume the ';'.
if (ExpectAndConsume(tok::semi, diag::err_expected_semi_after, "@class"))
return Actions.ConvertDeclToDeclGroup(0);
return Actions.ActOnForwardClassDeclaration(atLoc, ClassNames.data(),
ClassLocs.data(),
ClassNames.size());
}
///
/// objc-interface:
/// objc-class-interface-attributes[opt] objc-class-interface
/// objc-category-interface
///
/// objc-class-interface:
/// '@' 'interface' identifier objc-superclass[opt]
/// objc-protocol-refs[opt]
/// objc-class-instance-variables[opt]
/// objc-interface-decl-list
/// @end
///
/// objc-category-interface:
/// '@' 'interface' identifier '(' identifier[opt] ')'
/// objc-protocol-refs[opt]
/// objc-interface-decl-list
/// @end
///
/// objc-superclass:
/// ':' identifier
///
/// objc-class-interface-attributes:
/// __attribute__((visibility("default")))
/// __attribute__((visibility("hidden")))
/// __attribute__((deprecated))
/// __attribute__((unavailable))
/// __attribute__((objc_exception)) - used by NSException on 64-bit
///
Decl *Parser::ParseObjCAtInterfaceDeclaration(SourceLocation atLoc,
ParsedAttributes &attrs) {
assert(Tok.isObjCAtKeyword(tok::objc_interface) &&
"ParseObjCAtInterfaceDeclaration(): Expected @interface");
ConsumeToken(); // the "interface" identifier
// Code completion after '@interface'.
if (Tok.is(tok::code_completion)) {
Actions.CodeCompleteObjCInterfaceDecl(getCurScope());
cutOffParsing();
return 0;
}
if (Tok.isNot(tok::identifier)) {
Diag(Tok, diag::err_expected_ident); // missing class or category name.
return 0;
}
// We have a class or category name - consume it.
IdentifierInfo *nameId = Tok.getIdentifierInfo();
SourceLocation nameLoc = ConsumeToken();
if (Tok.is(tok::l_paren) &&
!isKnownToBeTypeSpecifier(GetLookAheadToken(1))) { // we have a category.
BalancedDelimiterTracker T(*this, tok::l_paren);
T.consumeOpen();
SourceLocation categoryLoc;
IdentifierInfo *categoryId = 0;
if (Tok.is(tok::code_completion)) {
Actions.CodeCompleteObjCInterfaceCategory(getCurScope(), nameId, nameLoc);
cutOffParsing();
return 0;
}
// For ObjC2, the category name is optional (not an error).
if (Tok.is(tok::identifier)) {
categoryId = Tok.getIdentifierInfo();
categoryLoc = ConsumeToken();
}
else if (!getLang().ObjC2) {
Diag(Tok, diag::err_expected_ident); // missing category name.
return 0;
}
T.consumeClose();
if (T.getCloseLocation().isInvalid())
return 0;
if (!attrs.empty()) { // categories don't support attributes.
Diag(nameLoc, diag::err_objc_no_attributes_on_category);
attrs.clear();
}
// Next, we need to check for any protocol references.
SourceLocation LAngleLoc, EndProtoLoc;
SmallVector<Decl *, 8> ProtocolRefs;
SmallVector<SourceLocation, 8> ProtocolLocs;
if (Tok.is(tok::less) &&
ParseObjCProtocolReferences(ProtocolRefs, ProtocolLocs, true,
LAngleLoc, EndProtoLoc))
return 0;
Decl *CategoryType =
Actions.ActOnStartCategoryInterface(atLoc,
nameId, nameLoc,
categoryId, categoryLoc,
ProtocolRefs.data(),
ProtocolRefs.size(),
ProtocolLocs.data(),
EndProtoLoc);
if (Tok.is(tok::l_brace))
ParseObjCClassInstanceVariables(CategoryType, tok::objc_private, atLoc);
ParseObjCInterfaceDeclList(tok::objc_not_keyword, CategoryType);
return CategoryType;
}
// Parse a class interface.
IdentifierInfo *superClassId = 0;
SourceLocation superClassLoc;
if (Tok.is(tok::colon)) { // a super class is specified.
ConsumeToken();
// Code completion of superclass names.
if (Tok.is(tok::code_completion)) {
Actions.CodeCompleteObjCSuperclass(getCurScope(), nameId, nameLoc);
cutOffParsing();
return 0;
}
if (Tok.isNot(tok::identifier)) {
Diag(Tok, diag::err_expected_ident); // missing super class name.
return 0;
}
superClassId = Tok.getIdentifierInfo();
superClassLoc = ConsumeToken();
}
// Next, we need to check for any protocol references.
SmallVector<Decl *, 8> ProtocolRefs;
SmallVector<SourceLocation, 8> ProtocolLocs;
SourceLocation LAngleLoc, EndProtoLoc;
if (Tok.is(tok::less) &&
ParseObjCProtocolReferences(ProtocolRefs, ProtocolLocs, true,
LAngleLoc, EndProtoLoc))
return 0;
Decl *ClsType =
Actions.ActOnStartClassInterface(atLoc, nameId, nameLoc,
superClassId, superClassLoc,
ProtocolRefs.data(), ProtocolRefs.size(),
ProtocolLocs.data(),
EndProtoLoc, attrs.getList());
if (Tok.is(tok::l_brace))
ParseObjCClassInstanceVariables(ClsType, tok::objc_protected, atLoc);
ParseObjCInterfaceDeclList(tok::objc_interface, ClsType);
return ClsType;
}
/// The Objective-C property callback. This should be defined where
/// it's used, but instead it's been lifted to here to support VS2005.
struct Parser::ObjCPropertyCallback : FieldCallback {
Parser &P;
SmallVectorImpl<Decl *> &Props;
ObjCDeclSpec &OCDS;
SourceLocation AtLoc;
tok::ObjCKeywordKind MethodImplKind;
ObjCPropertyCallback(Parser &P,
SmallVectorImpl<Decl *> &Props,
ObjCDeclSpec &OCDS, SourceLocation AtLoc,
tok::ObjCKeywordKind MethodImplKind) :
P(P), Props(Props), OCDS(OCDS), AtLoc(AtLoc),
MethodImplKind(MethodImplKind) {
}
Decl *invoke(FieldDeclarator &FD) {
if (FD.D.getIdentifier() == 0) {
P.Diag(AtLoc, diag::err_objc_property_requires_field_name)
<< FD.D.getSourceRange();
return 0;
}
if (FD.BitfieldSize) {
P.Diag(AtLoc, diag::err_objc_property_bitfield)
<< FD.D.getSourceRange();
return 0;
}
// Install the property declarator into interfaceDecl.
IdentifierInfo *SelName =
OCDS.getGetterName() ? OCDS.getGetterName() : FD.D.getIdentifier();
Selector GetterSel =
P.PP.getSelectorTable().getNullarySelector(SelName);
IdentifierInfo *SetterName = OCDS.getSetterName();
Selector SetterSel;
if (SetterName)
SetterSel = P.PP.getSelectorTable().getSelector(1, &SetterName);
else
SetterSel = SelectorTable::constructSetterName(P.PP.getIdentifierTable(),
P.PP.getSelectorTable(),
FD.D.getIdentifier());
bool isOverridingProperty = false;
Decl *Property =
P.Actions.ActOnProperty(P.getCurScope(), AtLoc, FD, OCDS,
GetterSel, SetterSel,
&isOverridingProperty,
MethodImplKind);
if (!isOverridingProperty)
Props.push_back(Property);
return Property;
}
};
/// objc-interface-decl-list:
/// empty
/// objc-interface-decl-list objc-property-decl [OBJC2]
/// objc-interface-decl-list objc-method-requirement [OBJC2]
/// objc-interface-decl-list objc-method-proto ';'
/// objc-interface-decl-list declaration
/// objc-interface-decl-list ';'
///
/// objc-method-requirement: [OBJC2]
/// @required
/// @optional
///
void Parser::ParseObjCInterfaceDeclList(tok::ObjCKeywordKind contextKey,
Decl *CDecl) {
SmallVector<Decl *, 32> allMethods;
SmallVector<Decl *, 16> allProperties;
SmallVector<DeclGroupPtrTy, 8> allTUVariables;
tok::ObjCKeywordKind MethodImplKind = tok::objc_not_keyword;
SourceRange AtEnd;
while (1) {
// If this is a method prototype, parse it.
if (Tok.is(tok::minus) || Tok.is(tok::plus)) {
Decl *methodPrototype =
ParseObjCMethodPrototype(MethodImplKind, false);
allMethods.push_back(methodPrototype);
// Consume the ';' here, since ParseObjCMethodPrototype() is re-used for
// method definitions.
ExpectAndConsume(tok::semi, diag::err_expected_semi_after_method_proto,
"", tok::semi);
continue;
}
if (Tok.is(tok::l_paren)) {
Diag(Tok, diag::err_expected_minus_or_plus);
ParseObjCMethodDecl(Tok.getLocation(),
tok::minus,
MethodImplKind, false);
continue;
}
// Ignore excess semicolons.
if (Tok.is(tok::semi)) {
ConsumeToken();
continue;
}
// If we got to the end of the file, exit the loop.
if (Tok.is(tok::eof))
break;
// Code completion within an Objective-C interface.
if (Tok.is(tok::code_completion)) {
Actions.CodeCompleteOrdinaryName(getCurScope(),
ObjCImpDecl? Sema::PCC_ObjCImplementation
: Sema::PCC_ObjCInterface);
return cutOffParsing();
}
// If we don't have an @ directive, parse it as a function definition.
if (Tok.isNot(tok::at)) {
// The code below does not consume '}'s because it is afraid of eating the
// end of a namespace. Because of the way this code is structured, an
// erroneous r_brace would cause an infinite loop if not handled here.
if (Tok.is(tok::r_brace))
break;
ParsedAttributes attrs(AttrFactory);
allTUVariables.push_back(ParseDeclarationOrFunctionDefinition(attrs));
continue;
}
// Otherwise, we have an @ directive, eat the @.
SourceLocation AtLoc = ConsumeToken(); // the "@"
if (Tok.is(tok::code_completion)) {
Actions.CodeCompleteObjCAtDirective(getCurScope());
return cutOffParsing();
break;
}
tok::ObjCKeywordKind DirectiveKind = Tok.getObjCKeywordID();
if (DirectiveKind == tok::objc_end) { // @end -> terminate list
AtEnd.setBegin(AtLoc);
AtEnd.setEnd(Tok.getLocation());
break;
} else if (DirectiveKind == tok::objc_not_keyword) {
Diag(Tok, diag::err_objc_unknown_at);
SkipUntil(tok::semi);
continue;
}
// Eat the identifier.
ConsumeToken();
switch (DirectiveKind) {
default:
// FIXME: If someone forgets an @end on a protocol, this loop will
// continue to eat up tons of stuff and spew lots of nonsense errors. It
// would probably be better to bail out if we saw an @class or @interface
// or something like that.
Diag(AtLoc, diag::err_objc_illegal_interface_qual);
// Skip until we see an '@' or '}' or ';'.
SkipUntil(tok::r_brace, tok::at);
break;
case tok::objc_implementation:
case tok::objc_interface:
Diag(Tok, diag::err_objc_missing_end);
ConsumeToken();
break;
case tok::objc_required:
case tok::objc_optional:
// This is only valid on protocols.
// FIXME: Should this check for ObjC2 being enabled?
if (contextKey != tok::objc_protocol)
Diag(AtLoc, diag::err_objc_directive_only_in_protocol);
else
MethodImplKind = DirectiveKind;
break;
case tok::objc_property:
if (!getLang().ObjC2)
Diag(AtLoc, diag::err_objc_properties_require_objc2);
ObjCDeclSpec OCDS;
// Parse property attribute list, if any.
if (Tok.is(tok::l_paren))
ParseObjCPropertyAttribute(OCDS);
ObjCPropertyCallback Callback(*this, allProperties,
OCDS, AtLoc, MethodImplKind);
// Parse all the comma separated declarators.
DeclSpec DS(AttrFactory);
ParseStructDeclaration(DS, Callback);
ExpectAndConsume(tok::semi, diag::err_expected_semi_decl_list);
break;
}
}
// We break out of the big loop in two cases: when we see @end or when we see
// EOF. In the former case, eat the @end. In the later case, emit an error.
if (Tok.is(tok::code_completion)) {
Actions.CodeCompleteObjCAtDirective(getCurScope());
return cutOffParsing();
} else if (Tok.isObjCAtKeyword(tok::objc_end))
ConsumeToken(); // the "end" identifier
else
Diag(Tok, diag::err_objc_missing_end);
// Insert collected methods declarations into the @interface object.
// This passes in an invalid SourceLocation for AtEndLoc when EOF is hit.
Actions.ActOnAtEnd(getCurScope(), AtEnd,
allMethods.data(), allMethods.size(),
allProperties.data(), allProperties.size(),
allTUVariables.data(), allTUVariables.size());
}
/// Parse property attribute declarations.
///
/// property-attr-decl: '(' property-attrlist ')'
/// property-attrlist:
/// property-attribute
/// property-attrlist ',' property-attribute
/// property-attribute:
/// getter '=' identifier
/// setter '=' identifier ':'
/// readonly
/// readwrite
/// assign
/// retain
/// copy
/// nonatomic
/// atomic
/// strong
/// weak
/// unsafe_unretained
///
void Parser::ParseObjCPropertyAttribute(ObjCDeclSpec &DS) {
assert(Tok.getKind() == tok::l_paren);
BalancedDelimiterTracker T(*this, tok::l_paren);
T.consumeOpen();
while (1) {
if (Tok.is(tok::code_completion)) {
Actions.CodeCompleteObjCPropertyFlags(getCurScope(), DS);
return cutOffParsing();
}
const IdentifierInfo *II = Tok.getIdentifierInfo();
// If this is not an identifier at all, bail out early.
if (II == 0) {
T.consumeClose();
return;
}
SourceLocation AttrName = ConsumeToken(); // consume last attribute name
if (II->isStr("readonly"))
DS.setPropertyAttributes(ObjCDeclSpec::DQ_PR_readonly);
else if (II->isStr("assign"))
DS.setPropertyAttributes(ObjCDeclSpec::DQ_PR_assign);
else if (II->isStr("unsafe_unretained"))
DS.setPropertyAttributes(ObjCDeclSpec::DQ_PR_unsafe_unretained);
else if (II->isStr("readwrite"))
DS.setPropertyAttributes(ObjCDeclSpec::DQ_PR_readwrite);
else if (II->isStr("retain"))
DS.setPropertyAttributes(ObjCDeclSpec::DQ_PR_retain);
else if (II->isStr("strong"))
DS.setPropertyAttributes(ObjCDeclSpec::DQ_PR_strong);
else if (II->isStr("copy"))
DS.setPropertyAttributes(ObjCDeclSpec::DQ_PR_copy);
else if (II->isStr("nonatomic"))
DS.setPropertyAttributes(ObjCDeclSpec::DQ_PR_nonatomic);
else if (II->isStr("atomic"))
DS.setPropertyAttributes(ObjCDeclSpec::DQ_PR_atomic);
else if (II->isStr("weak"))
DS.setPropertyAttributes(ObjCDeclSpec::DQ_PR_weak);
else if (II->isStr("getter") || II->isStr("setter")) {
bool IsSetter = II->getNameStart()[0] == 's';
// getter/setter require extra treatment.
unsigned DiagID = IsSetter ? diag::err_objc_expected_equal_for_setter :
diag::err_objc_expected_equal_for_getter;
if (ExpectAndConsume(tok::equal, DiagID, "", tok::r_paren))
return;
if (Tok.is(tok::code_completion)) {
if (IsSetter)
Actions.CodeCompleteObjCPropertySetter(getCurScope());
else
Actions.CodeCompleteObjCPropertyGetter(getCurScope());
return cutOffParsing();
}
SourceLocation SelLoc;
IdentifierInfo *SelIdent = ParseObjCSelectorPiece(SelLoc);
if (!SelIdent) {
Diag(Tok, diag::err_objc_expected_selector_for_getter_setter)
<< IsSetter;
SkipUntil(tok::r_paren);
return;
}
if (IsSetter) {
DS.setPropertyAttributes(ObjCDeclSpec::DQ_PR_setter);
DS.setSetterName(SelIdent);
if (ExpectAndConsume(tok::colon,
diag::err_expected_colon_after_setter_name, "",
tok::r_paren))
return;
} else {
DS.setPropertyAttributes(ObjCDeclSpec::DQ_PR_getter);
DS.setGetterName(SelIdent);
}
} else {
Diag(AttrName, diag::err_objc_expected_property_attr) << II;
SkipUntil(tok::r_paren);
return;
}
if (Tok.isNot(tok::comma))
break;
ConsumeToken();
}
T.consumeClose();
}
/// objc-method-proto:
/// objc-instance-method objc-method-decl objc-method-attributes[opt]
/// objc-class-method objc-method-decl objc-method-attributes[opt]
///
/// objc-instance-method: '-'
/// objc-class-method: '+'
///
/// objc-method-attributes: [OBJC2]
/// __attribute__((deprecated))
///
Decl *Parser::ParseObjCMethodPrototype(tok::ObjCKeywordKind MethodImplKind,
bool MethodDefinition) {
assert((Tok.is(tok::minus) || Tok.is(tok::plus)) && "expected +/-");
tok::TokenKind methodType = Tok.getKind();
SourceLocation mLoc = ConsumeToken();
Decl *MDecl = ParseObjCMethodDecl(mLoc, methodType, MethodImplKind,
MethodDefinition);
// Since this rule is used for both method declarations and definitions,
// the caller is (optionally) responsible for consuming the ';'.
return MDecl;
}
/// objc-selector:
/// identifier
/// one of
/// enum struct union if else while do for switch case default
/// break continue return goto asm sizeof typeof __alignof
/// unsigned long const short volatile signed restrict _Complex
/// in out inout bycopy byref oneway int char float double void _Bool
///
IdentifierInfo *Parser::ParseObjCSelectorPiece(SourceLocation &SelectorLoc) {
switch (Tok.getKind()) {
default:
return 0;
case tok::ampamp:
case tok::ampequal:
case tok::amp:
case tok::pipe:
case tok::tilde:
case tok::exclaim:
case tok::exclaimequal:
case tok::pipepipe:
case tok::pipeequal:
case tok::caret:
case tok::caretequal: {
std::string ThisTok(PP.getSpelling(Tok));
if (isalpha(ThisTok[0])) {
IdentifierInfo *II = &PP.getIdentifierTable().get(ThisTok.data());
Tok.setKind(tok::identifier);
SelectorLoc = ConsumeToken();
return II;
}
return 0;
}
case tok::identifier:
case tok::kw_asm:
case tok::kw_auto:
case tok::kw_bool:
case tok::kw_break:
case tok::kw_case:
case tok::kw_catch:
case tok::kw_char:
case tok::kw_class:
case tok::kw_const:
case tok::kw_const_cast:
case tok::kw_continue:
case tok::kw_default:
case tok::kw_delete:
case tok::kw_do:
case tok::kw_double:
case tok::kw_dynamic_cast:
case tok::kw_else:
case tok::kw_enum:
case tok::kw_explicit:
case tok::kw_export:
case tok::kw_extern:
case tok::kw_false:
case tok::kw_float:
case tok::kw_for:
case tok::kw_friend:
case tok::kw_goto:
case tok::kw_if:
case tok::kw_inline:
case tok::kw_int:
case tok::kw_long:
case tok::kw_mutable:
case tok::kw_namespace:
case tok::kw_new:
case tok::kw_operator:
case tok::kw_private:
case tok::kw_protected:
case tok::kw_public:
case tok::kw_register:
case tok::kw_reinterpret_cast:
case tok::kw_restrict:
case tok::kw_return:
case tok::kw_short:
case tok::kw_signed:
case tok::kw_sizeof:
case tok::kw_static:
case tok::kw_static_cast:
case tok::kw_struct:
case tok::kw_switch:
case tok::kw_template:
case tok::kw_this:
case tok::kw_throw:
case tok::kw_true:
case tok::kw_try:
case tok::kw_typedef:
case tok::kw_typeid:
case tok::kw_typename:
case tok::kw_typeof:
case tok::kw_union:
case tok::kw_unsigned:
case tok::kw_using:
case tok::kw_virtual:
case tok::kw_void:
case tok::kw_volatile:
case tok::kw_wchar_t:
case tok::kw_while:
case tok::kw__Bool:
case tok::kw__Complex:
case tok::kw___alignof:
IdentifierInfo *II = Tok.getIdentifierInfo();
SelectorLoc = ConsumeToken();
return II;
}
}
/// objc-for-collection-in: 'in'
///
bool Parser::isTokIdentifier_in() const {
// FIXME: May have to do additional look-ahead to only allow for
// valid tokens following an 'in'; such as an identifier, unary operators,
// '[' etc.
return (getLang().ObjC2 && Tok.is(tok::identifier) &&
Tok.getIdentifierInfo() == ObjCTypeQuals[objc_in]);
}
/// ParseObjCTypeQualifierList - This routine parses the objective-c's type
/// qualifier list and builds their bitmask representation in the input
/// argument.
///
/// objc-type-qualifiers:
/// objc-type-qualifier
/// objc-type-qualifiers objc-type-qualifier
///
void Parser::ParseObjCTypeQualifierList(ObjCDeclSpec &DS,
Declarator::TheContext Context) {
assert(Context == Declarator::ObjCParameterContext ||
Context == Declarator::ObjCResultContext);
while (1) {
if (Tok.is(tok::code_completion)) {
Actions.CodeCompleteObjCPassingType(getCurScope(), DS,
Context == Declarator::ObjCParameterContext);
return cutOffParsing();
}
if (Tok.isNot(tok::identifier))
return;
const IdentifierInfo *II = Tok.getIdentifierInfo();
for (unsigned i = 0; i != objc_NumQuals; ++i) {
if (II != ObjCTypeQuals[i])
continue;
ObjCDeclSpec::ObjCDeclQualifier Qual;
switch (i) {
default: llvm_unreachable("Unknown decl qualifier");
case objc_in: Qual = ObjCDeclSpec::DQ_In; break;
case objc_out: Qual = ObjCDeclSpec::DQ_Out; break;
case objc_inout: Qual = ObjCDeclSpec::DQ_Inout; break;
case objc_oneway: Qual = ObjCDeclSpec::DQ_Oneway; break;
case objc_bycopy: Qual = ObjCDeclSpec::DQ_Bycopy; break;
case objc_byref: Qual = ObjCDeclSpec::DQ_Byref; break;
}
DS.setObjCDeclQualifier(Qual);
ConsumeToken();
II = 0;
break;
}
// If this wasn't a recognized qualifier, bail out.
if (II) return;
}
}
/// Take all the decl attributes out of the given list and add
/// them to the given attribute set.
static void takeDeclAttributes(ParsedAttributes &attrs,
AttributeList *list) {
while (list) {
AttributeList *cur = list;
list = cur->getNext();
if (!cur->isUsedAsTypeAttr()) {
// Clear out the next pointer. We're really completely
// destroying the internal invariants of the declarator here,
// but it doesn't matter because we're done with it.
cur->setNext(0);
attrs.add(cur);
}
}
}
/// takeDeclAttributes - Take all the decl attributes from the given
/// declarator and add them to the given list.
static void takeDeclAttributes(ParsedAttributes &attrs,
Declarator &D) {
// First, take ownership of all attributes.
attrs.getPool().takeAllFrom(D.getAttributePool());
attrs.getPool().takeAllFrom(D.getDeclSpec().getAttributePool());
// Now actually move the attributes over.
takeDeclAttributes(attrs, D.getDeclSpec().getAttributes().getList());
takeDeclAttributes(attrs, D.getAttributes());
for (unsigned i = 0, e = D.getNumTypeObjects(); i != e; ++i)
takeDeclAttributes(attrs,
const_cast<AttributeList*>(D.getTypeObject(i).getAttrs()));
}
/// objc-type-name:
/// '(' objc-type-qualifiers[opt] type-name ')'
/// '(' objc-type-qualifiers[opt] ')'
///
ParsedType Parser::ParseObjCTypeName(ObjCDeclSpec &DS,
Declarator::TheContext context,
ParsedAttributes *paramAttrs) {
assert(context == Declarator::ObjCParameterContext ||
context == Declarator::ObjCResultContext);
assert((paramAttrs != 0) == (context == Declarator::ObjCParameterContext));
assert(Tok.is(tok::l_paren) && "expected (");
BalancedDelimiterTracker T(*this, tok::l_paren);
T.consumeOpen();
SourceLocation TypeStartLoc = Tok.getLocation();
ObjCDeclContextSwitch ObjCDC(*this);
// Parse type qualifiers, in, inout, etc.
ParseObjCTypeQualifierList(DS, context);
ParsedType Ty;
if (isTypeSpecifierQualifier()) {
// Parse an abstract declarator.
DeclSpec declSpec(AttrFactory);
declSpec.setObjCQualifiers(&DS);
ParseSpecifierQualifierList(declSpec);
Declarator declarator(declSpec, context);
ParseDeclarator(declarator);
// If that's not invalid, extract a type.
if (!declarator.isInvalidType()) {
TypeResult type = Actions.ActOnTypeName(getCurScope(), declarator);
if (!type.isInvalid())
Ty = type.get();
// If we're parsing a parameter, steal all the decl attributes
// and add them to the decl spec.
if (context == Declarator::ObjCParameterContext)
takeDeclAttributes(*paramAttrs, declarator);
}
} else if (context == Declarator::ObjCResultContext &&
Tok.is(tok::identifier)) {
if (!Ident_instancetype)
Ident_instancetype = PP.getIdentifierInfo("instancetype");
if (Tok.getIdentifierInfo() == Ident_instancetype) {
Ty = Actions.ActOnObjCInstanceType(Tok.getLocation());
ConsumeToken();
}
}
if (Tok.is(tok::r_paren))
T.consumeClose();
else if (Tok.getLocation() == TypeStartLoc) {
// If we didn't eat any tokens, then this isn't a type.
Diag(Tok, diag::err_expected_type);
SkipUntil(tok::r_paren);
} else {
// Otherwise, we found *something*, but didn't get a ')' in the right
// place. Emit an error then return what we have as the type.
T.consumeClose();
}
return Ty;
}
/// objc-method-decl:
/// objc-selector
/// objc-keyword-selector objc-parmlist[opt]
/// objc-type-name objc-selector
/// objc-type-name objc-keyword-selector objc-parmlist[opt]
///
/// objc-keyword-selector:
/// objc-keyword-decl
/// objc-keyword-selector objc-keyword-decl
///
/// objc-keyword-decl:
/// objc-selector ':' objc-type-name objc-keyword-attributes[opt] identifier
/// objc-selector ':' objc-keyword-attributes[opt] identifier
/// ':' objc-type-name objc-keyword-attributes[opt] identifier
/// ':' objc-keyword-attributes[opt] identifier
///
/// objc-parmlist:
/// objc-parms objc-ellipsis[opt]
///
/// objc-parms:
/// objc-parms , parameter-declaration
///
/// objc-ellipsis:
/// , ...
///
/// objc-keyword-attributes: [OBJC2]
/// __attribute__((unused))
///
Decl *Parser::ParseObjCMethodDecl(SourceLocation mLoc,
tok::TokenKind mType,
tok::ObjCKeywordKind MethodImplKind,
bool MethodDefinition) {
ParsingDeclRAIIObject PD(*this);
if (Tok.is(tok::code_completion)) {
Actions.CodeCompleteObjCMethodDecl(getCurScope(), mType == tok::minus,
/*ReturnType=*/ ParsedType());
cutOffParsing();
return 0;
}
// Parse the return type if present.
ParsedType ReturnType;
ObjCDeclSpec DSRet;
if (Tok.is(tok::l_paren))
ReturnType = ParseObjCTypeName(DSRet, Declarator::ObjCResultContext, 0);
// If attributes exist before the method, parse them.
ParsedAttributes methodAttrs(AttrFactory);
if (getLang().ObjC2)
MaybeParseGNUAttributes(methodAttrs);
if (Tok.is(tok::code_completion)) {
Actions.CodeCompleteObjCMethodDecl(getCurScope(), mType == tok::minus,
ReturnType);
cutOffParsing();
return 0;
}
// Now parse the selector.
SourceLocation selLoc;
IdentifierInfo *SelIdent = ParseObjCSelectorPiece(selLoc);
// An unnamed colon is valid.
if (!SelIdent && Tok.isNot(tok::colon)) { // missing selector name.
Diag(Tok, diag::err_expected_selector_for_method)
<< SourceRange(mLoc, Tok.getLocation());
// Skip until we get a ; or {}.
SkipUntil(tok::r_brace);
return 0;
}
SmallVector<DeclaratorChunk::ParamInfo, 8> CParamInfo;
if (Tok.isNot(tok::colon)) {
// If attributes exist after the method, parse them.
if (getLang().ObjC2)
MaybeParseGNUAttributes(methodAttrs);
Selector Sel = PP.getSelectorTable().getNullarySelector(SelIdent);
Decl *Result
= Actions.ActOnMethodDeclaration(getCurScope(), mLoc, Tok.getLocation(),
mType, DSRet, ReturnType,
selLoc, Sel, 0,
CParamInfo.data(), CParamInfo.size(),
methodAttrs.getList(), MethodImplKind,
false, MethodDefinition);
PD.complete(Result);
return Result;
}
SmallVector<IdentifierInfo *, 12> KeyIdents;
SmallVector<SourceLocation, 12> KeyLocs;
SmallVector<Sema::ObjCArgInfo, 12> ArgInfos;
ParseScope PrototypeScope(this,
Scope::FunctionPrototypeScope|Scope::DeclScope);
AttributePool allParamAttrs(AttrFactory);
while (1) {
ParsedAttributes paramAttrs(AttrFactory);
Sema::ObjCArgInfo ArgInfo;
// Each iteration parses a single keyword argument.
if (Tok.isNot(tok::colon)) {
Diag(Tok, diag::err_expected_colon);
break;
}
ConsumeToken(); // Eat the ':'.
ArgInfo.Type = ParsedType();
if (Tok.is(tok::l_paren)) // Parse the argument type if present.
ArgInfo.Type = ParseObjCTypeName(ArgInfo.DeclSpec,
Declarator::ObjCParameterContext,
&paramAttrs);
// If attributes exist before the argument name, parse them.
// Regardless, collect all the attributes we've parsed so far.
ArgInfo.ArgAttrs = 0;
if (getLang().ObjC2) {
MaybeParseGNUAttributes(paramAttrs);
ArgInfo.ArgAttrs = paramAttrs.getList();
}
// Code completion for the next piece of the selector.
if (Tok.is(tok::code_completion)) {
KeyIdents.push_back(SelIdent);
Actions.CodeCompleteObjCMethodDeclSelector(getCurScope(),
mType == tok::minus,
/*AtParameterName=*/true,
ReturnType,
KeyIdents.data(),
KeyIdents.size());
cutOffParsing();
return 0;
}
if (Tok.isNot(tok::identifier)) {
Diag(Tok, diag::err_expected_ident); // missing argument name.
break;
}
ArgInfo.Name = Tok.getIdentifierInfo();
ArgInfo.NameLoc = Tok.getLocation();
ConsumeToken(); // Eat the identifier.
ArgInfos.push_back(ArgInfo);
KeyIdents.push_back(SelIdent);
KeyLocs.push_back(selLoc);
// Make sure the attributes persist.
allParamAttrs.takeAllFrom(paramAttrs.getPool());
// Code completion for the next piece of the selector.
if (Tok.is(tok::code_completion)) {
Actions.CodeCompleteObjCMethodDeclSelector(getCurScope(),
mType == tok::minus,
/*AtParameterName=*/false,
ReturnType,
KeyIdents.data(),
KeyIdents.size());
cutOffParsing();
return 0;
}
// Check for another keyword selector.
SelIdent = ParseObjCSelectorPiece(selLoc);
if (!SelIdent && Tok.isNot(tok::colon))
break;
// We have a selector or a colon, continue parsing.
}
bool isVariadic = false;
// Parse the (optional) parameter list.
while (Tok.is(tok::comma)) {
ConsumeToken();
if (Tok.is(tok::ellipsis)) {
isVariadic = true;
ConsumeToken();
break;
}
DeclSpec DS(AttrFactory);
ParseDeclarationSpecifiers(DS);
// Parse the declarator.
Declarator ParmDecl(DS, Declarator::PrototypeContext);
ParseDeclarator(ParmDecl);
IdentifierInfo *ParmII = ParmDecl.getIdentifier();
Decl *Param = Actions.ActOnParamDeclarator(getCurScope(), ParmDecl);
CParamInfo.push_back(DeclaratorChunk::ParamInfo(ParmII,
ParmDecl.getIdentifierLoc(),
Param,
0));
}
// FIXME: Add support for optional parameter list...
// If attributes exist after the method, parse them.
if (getLang().ObjC2)
MaybeParseGNUAttributes(methodAttrs);
if (KeyIdents.size() == 0)
return 0;
Selector Sel = PP.getSelectorTable().getSelector(KeyIdents.size(),
&KeyIdents[0]);
Decl *Result
= Actions.ActOnMethodDeclaration(getCurScope(), mLoc, Tok.getLocation(),
mType, DSRet, ReturnType,
KeyLocs, Sel, &ArgInfos[0],
CParamInfo.data(), CParamInfo.size(),
methodAttrs.getList(),
MethodImplKind, isVariadic, MethodDefinition);
PD.complete(Result);
return Result;
}
/// objc-protocol-refs:
/// '<' identifier-list '>'
///
bool Parser::
ParseObjCProtocolReferences(SmallVectorImpl<Decl *> &Protocols,
SmallVectorImpl<SourceLocation> &ProtocolLocs,
bool WarnOnDeclarations,
SourceLocation &LAngleLoc, SourceLocation &EndLoc) {
assert(Tok.is(tok::less) && "expected <");
LAngleLoc = ConsumeToken(); // the "<"
SmallVector<IdentifierLocPair, 8> ProtocolIdents;
while (1) {
if (Tok.is(tok::code_completion)) {
Actions.CodeCompleteObjCProtocolReferences(ProtocolIdents.data(),
ProtocolIdents.size());
cutOffParsing();
return true;
}
if (Tok.isNot(tok::identifier)) {
Diag(Tok, diag::err_expected_ident);
SkipUntil(tok::greater);
return true;
}
ProtocolIdents.push_back(std::make_pair(Tok.getIdentifierInfo(),
Tok.getLocation()));
ProtocolLocs.push_back(Tok.getLocation());
ConsumeToken();
if (Tok.isNot(tok::comma))
break;
ConsumeToken();
}
// Consume the '>'.
if (Tok.isNot(tok::greater)) {
Diag(Tok, diag::err_expected_greater);
return true;
}
EndLoc = ConsumeAnyToken();
// Convert the list of protocols identifiers into a list of protocol decls.
Actions.FindProtocolDeclaration(WarnOnDeclarations,
&ProtocolIdents[0], ProtocolIdents.size(),
Protocols);
return false;
}
/// \brief Parse the Objective-C protocol qualifiers that follow a typename
/// in a decl-specifier-seq, starting at the '<'.
bool Parser::ParseObjCProtocolQualifiers(DeclSpec &DS) {
assert(Tok.is(tok::less) && "Protocol qualifiers start with '<'");
assert(getLang().ObjC1 && "Protocol qualifiers only exist in Objective-C");
SourceLocation LAngleLoc, EndProtoLoc;
SmallVector<Decl *, 8> ProtocolDecl;
SmallVector<SourceLocation, 8> ProtocolLocs;
bool Result = ParseObjCProtocolReferences(ProtocolDecl, ProtocolLocs, false,
LAngleLoc, EndProtoLoc);
DS.setProtocolQualifiers(ProtocolDecl.data(), ProtocolDecl.size(),
ProtocolLocs.data(), LAngleLoc);
if (EndProtoLoc.isValid())
DS.SetRangeEnd(EndProtoLoc);
return Result;
}
/// objc-class-instance-variables:
/// '{' objc-instance-variable-decl-list[opt] '}'
///
/// objc-instance-variable-decl-list:
/// objc-visibility-spec
/// objc-instance-variable-decl ';'
/// ';'
/// objc-instance-variable-decl-list objc-visibility-spec
/// objc-instance-variable-decl-list objc-instance-variable-decl ';'
/// objc-instance-variable-decl-list ';'
///
/// objc-visibility-spec:
/// @private
/// @protected
/// @public
/// @package [OBJC2]
///
/// objc-instance-variable-decl:
/// struct-declaration
///
void Parser::ParseObjCClassInstanceVariables(Decl *interfaceDecl,
tok::ObjCKeywordKind visibility,
SourceLocation atLoc) {
assert(Tok.is(tok::l_brace) && "expected {");
SmallVector<Decl *, 32> AllIvarDecls;
ParseScope ClassScope(this, Scope::DeclScope|Scope::ClassScope);
ObjCDeclContextSwitch ObjCDC(*this);
BalancedDelimiterTracker T(*this, tok::l_brace);
T.consumeOpen();
// While we still have something to read, read the instance variables.
while (Tok.isNot(tok::r_brace) && Tok.isNot(tok::eof)) {
// Each iteration of this loop reads one objc-instance-variable-decl.
// Check for extraneous top-level semicolon.
if (Tok.is(tok::semi)) {
Diag(Tok, diag::ext_extra_ivar_semi)
<< FixItHint::CreateRemoval(Tok.getLocation());
ConsumeToken();
continue;
}
// Set the default visibility to private.
if (Tok.is(tok::at)) { // parse objc-visibility-spec
ConsumeToken(); // eat the @ sign
if (Tok.is(tok::code_completion)) {
Actions.CodeCompleteObjCAtVisibility(getCurScope());
return cutOffParsing();
}
switch (Tok.getObjCKeywordID()) {
case tok::objc_private:
case tok::objc_public:
case tok::objc_protected:
case tok::objc_package:
visibility = Tok.getObjCKeywordID();
ConsumeToken();
continue;
default:
Diag(Tok, diag::err_objc_illegal_visibility_spec);
continue;
}
}
if (Tok.is(tok::code_completion)) {
Actions.CodeCompleteOrdinaryName(getCurScope(),
Sema::PCC_ObjCInstanceVariableList);
return cutOffParsing();
}
struct ObjCIvarCallback : FieldCallback {
Parser &P;
Decl *IDecl;
tok::ObjCKeywordKind visibility;
SmallVectorImpl<Decl *> &AllIvarDecls;
ObjCIvarCallback(Parser &P, Decl *IDecl, tok::ObjCKeywordKind V,
SmallVectorImpl<Decl *> &AllIvarDecls) :
P(P), IDecl(IDecl), visibility(V), AllIvarDecls(AllIvarDecls) {
}
Decl *invoke(FieldDeclarator &FD) {
P.Actions.ActOnObjCContainerStartDefinition(IDecl);
// Install the declarator into the interface decl.
Decl *Field
= P.Actions.ActOnIvar(P.getCurScope(),
FD.D.getDeclSpec().getSourceRange().getBegin(),
FD.D, FD.BitfieldSize, visibility);
P.Actions.ActOnObjCContainerFinishDefinition();
if (Field)
AllIvarDecls.push_back(Field);
return Field;
}
} Callback(*this, interfaceDecl, visibility, AllIvarDecls);
// Parse all the comma separated declarators.
DeclSpec DS(AttrFactory);
ParseStructDeclaration(DS, Callback);
if (Tok.is(tok::semi)) {
ConsumeToken();
} else {
Diag(Tok, diag::err_expected_semi_decl_list);
// Skip to end of block or statement
SkipUntil(tok::r_brace, true, true);
}
}
T.consumeClose();
Actions.ActOnObjCContainerStartDefinition(interfaceDecl);
Actions.ActOnLastBitfield(T.getCloseLocation(), AllIvarDecls);
Actions.ActOnObjCContainerFinishDefinition();
// Call ActOnFields() even if we don't have any decls. This is useful
// for code rewriting tools that need to be aware of the empty list.
Actions.ActOnFields(getCurScope(), atLoc, interfaceDecl,
AllIvarDecls,
T.getOpenLocation(), T.getCloseLocation(), 0);
return;
}
/// objc-protocol-declaration:
/// objc-protocol-definition
/// objc-protocol-forward-reference
///
/// objc-protocol-definition:
/// @protocol identifier
/// objc-protocol-refs[opt]
/// objc-interface-decl-list
/// @end
///
/// objc-protocol-forward-reference:
/// @protocol identifier-list ';'
///
/// "@protocol identifier ;" should be resolved as "@protocol
/// identifier-list ;": objc-interface-decl-list may not start with a
/// semicolon in the first alternative if objc-protocol-refs are omitted.
Decl *Parser::ParseObjCAtProtocolDeclaration(SourceLocation AtLoc,
ParsedAttributes &attrs) {
assert(Tok.isObjCAtKeyword(tok::objc_protocol) &&
"ParseObjCAtProtocolDeclaration(): Expected @protocol");
ConsumeToken(); // the "protocol" identifier
if (Tok.is(tok::code_completion)) {
Actions.CodeCompleteObjCProtocolDecl(getCurScope());
cutOffParsing();
return 0;
}
if (Tok.isNot(tok::identifier)) {
Diag(Tok, diag::err_expected_ident); // missing protocol name.
return 0;
}
// Save the protocol name, then consume it.
IdentifierInfo *protocolName = Tok.getIdentifierInfo();
SourceLocation nameLoc = ConsumeToken();
if (Tok.is(tok::semi)) { // forward declaration of one protocol.
IdentifierLocPair ProtoInfo(protocolName, nameLoc);
ConsumeToken();
return Actions.ActOnForwardProtocolDeclaration(AtLoc, &ProtoInfo, 1,
attrs.getList());
}
if (Tok.is(tok::comma)) { // list of forward declarations.
SmallVector<IdentifierLocPair, 8> ProtocolRefs;
ProtocolRefs.push_back(std::make_pair(protocolName, nameLoc));
// Parse the list of forward declarations.
while (1) {
ConsumeToken(); // the ','
if (Tok.isNot(tok::identifier)) {
Diag(Tok, diag::err_expected_ident);
SkipUntil(tok::semi);
return 0;
}
ProtocolRefs.push_back(IdentifierLocPair(Tok.getIdentifierInfo(),
Tok.getLocation()));
ConsumeToken(); // the identifier
if (Tok.isNot(tok::comma))
break;
}
// Consume the ';'.
if (ExpectAndConsume(tok::semi, diag::err_expected_semi_after, "@protocol"))
return 0;
return Actions.ActOnForwardProtocolDeclaration(AtLoc,
&ProtocolRefs[0],
ProtocolRefs.size(),
attrs.getList());
}
// Last, and definitely not least, parse a protocol declaration.
SourceLocation LAngleLoc, EndProtoLoc;
SmallVector<Decl *, 8> ProtocolRefs;
SmallVector<SourceLocation, 8> ProtocolLocs;
if (Tok.is(tok::less) &&
ParseObjCProtocolReferences(ProtocolRefs, ProtocolLocs, false,
LAngleLoc, EndProtoLoc))
return 0;
Decl *ProtoType =
Actions.ActOnStartProtocolInterface(AtLoc, protocolName, nameLoc,
ProtocolRefs.data(),
ProtocolRefs.size(),
ProtocolLocs.data(),
EndProtoLoc, attrs.getList());
ParseObjCInterfaceDeclList(tok::objc_protocol, ProtoType);
return ProtoType;
}
/// objc-implementation:
/// objc-class-implementation-prologue
/// objc-category-implementation-prologue
///
/// objc-class-implementation-prologue:
/// @implementation identifier objc-superclass[opt]
/// objc-class-instance-variables[opt]
///
/// objc-category-implementation-prologue:
/// @implementation identifier ( identifier )
Decl *Parser::ParseObjCAtImplementationDeclaration(
SourceLocation atLoc) {
assert(Tok.isObjCAtKeyword(tok::objc_implementation) &&
"ParseObjCAtImplementationDeclaration(): Expected @implementation");
ConsumeToken(); // the "implementation" identifier
// Code completion after '@implementation'.
if (Tok.is(tok::code_completion)) {
Actions.CodeCompleteObjCImplementationDecl(getCurScope());
cutOffParsing();
return 0;
}
if (Tok.isNot(tok::identifier)) {
Diag(Tok, diag::err_expected_ident); // missing class or category name.
return 0;
}
// We have a class or category name - consume it.
IdentifierInfo *nameId = Tok.getIdentifierInfo();
SourceLocation nameLoc = ConsumeToken(); // consume class or category name
if (Tok.is(tok::l_paren)) {
// we have a category implementation.
ConsumeParen();
SourceLocation categoryLoc, rparenLoc;
IdentifierInfo *categoryId = 0;
if (Tok.is(tok::code_completion)) {
Actions.CodeCompleteObjCImplementationCategory(getCurScope(), nameId, nameLoc);
cutOffParsing();
return 0;
}
if (Tok.is(tok::identifier)) {
categoryId = Tok.getIdentifierInfo();
categoryLoc = ConsumeToken();
} else {
Diag(Tok, diag::err_expected_ident); // missing category name.
return 0;
}
if (Tok.isNot(tok::r_paren)) {
Diag(Tok, diag::err_expected_rparen);
SkipUntil(tok::r_paren, false); // don't stop at ';'
return 0;
}
rparenLoc = ConsumeParen();
Decl *ImplCatType = Actions.ActOnStartCategoryImplementation(
atLoc, nameId, nameLoc, categoryId,
categoryLoc);
ObjCImpDecl = ImplCatType;
PendingObjCImpDecl.push_back(ObjCImpDecl);
return 0;
}
// We have a class implementation
SourceLocation superClassLoc;
IdentifierInfo *superClassId = 0;
if (Tok.is(tok::colon)) {
// We have a super class
ConsumeToken();
if (Tok.isNot(tok::identifier)) {
Diag(Tok, diag::err_expected_ident); // missing super class name.
return 0;
}
superClassId = Tok.getIdentifierInfo();
superClassLoc = ConsumeToken(); // Consume super class name
}
Decl *ImplClsType = Actions.ActOnStartClassImplementation(
atLoc, nameId, nameLoc,
superClassId, superClassLoc);
if (Tok.is(tok::l_brace)) // we have ivars
ParseObjCClassInstanceVariables(ImplClsType, tok::objc_private, atLoc);
ObjCImpDecl = ImplClsType;
PendingObjCImpDecl.push_back(ObjCImpDecl);
return 0;
}
Parser::DeclGroupPtrTy
Parser::ParseObjCAtEndDeclaration(SourceRange atEnd) {
assert(Tok.isObjCAtKeyword(tok::objc_end) &&
"ParseObjCAtEndDeclaration(): Expected @end");
ConsumeToken(); // the "end" identifier
SmallVector<Decl *, 8> DeclsInGroup;
Actions.DefaultSynthesizeProperties(getCurScope(), ObjCImpDecl);
for (size_t i = 0; i < LateParsedObjCMethods.size(); ++i) {
Decl *D = ParseLexedObjCMethodDefs(*LateParsedObjCMethods[i]);
if (D)
DeclsInGroup.push_back(D);
}
DeclsInGroup.push_back(ObjCImpDecl);
if (ObjCImpDecl) {
Actions.ActOnAtEnd(getCurScope(), atEnd);
PendingObjCImpDecl.pop_back();
}
else
// missing @implementation
Diag(atEnd.getBegin(), diag::err_expected_implementation);
clearLateParsedObjCMethods();
ObjCImpDecl = 0;
return Actions.BuildDeclaratorGroup(
DeclsInGroup.data(), DeclsInGroup.size(), false);
}
Parser::DeclGroupPtrTy Parser::FinishPendingObjCActions() {
Actions.DiagnoseUseOfUnimplementedSelectors();
if (PendingObjCImpDecl.empty())
return Actions.ConvertDeclToDeclGroup(0);
Decl *ImpDecl = PendingObjCImpDecl.pop_back_val();
Actions.ActOnAtEnd(getCurScope(), SourceRange());
return Actions.ConvertDeclToDeclGroup(ImpDecl);
}
void Parser::clearLateParsedObjCMethods() {
for (LateParsedObjCMethodContainer::iterator
I = LateParsedObjCMethods.begin(),
E = LateParsedObjCMethods.end(); I != E; ++I)
delete *I;
LateParsedObjCMethods.clear();
}
/// compatibility-alias-decl:
/// @compatibility_alias alias-name class-name ';'
///
Decl *Parser::ParseObjCAtAliasDeclaration(SourceLocation atLoc) {
assert(Tok.isObjCAtKeyword(tok::objc_compatibility_alias) &&
"ParseObjCAtAliasDeclaration(): Expected @compatibility_alias");
ConsumeToken(); // consume compatibility_alias
if (Tok.isNot(tok::identifier)) {
Diag(Tok, diag::err_expected_ident);
return 0;
}
IdentifierInfo *aliasId = Tok.getIdentifierInfo();
SourceLocation aliasLoc = ConsumeToken(); // consume alias-name
if (Tok.isNot(tok::identifier)) {
Diag(Tok, diag::err_expected_ident);
return 0;
}
IdentifierInfo *classId = Tok.getIdentifierInfo();
SourceLocation classLoc = ConsumeToken(); // consume class-name;
ExpectAndConsume(tok::semi, diag::err_expected_semi_after,
"@compatibility_alias");
return Actions.ActOnCompatiblityAlias(atLoc, aliasId, aliasLoc,
classId, classLoc);
}
/// property-synthesis:
/// @synthesize property-ivar-list ';'
///
/// property-ivar-list:
/// property-ivar
/// property-ivar-list ',' property-ivar
///
/// property-ivar:
/// identifier
/// identifier '=' identifier
///
Decl *Parser::ParseObjCPropertySynthesize(SourceLocation atLoc) {
assert(Tok.isObjCAtKeyword(tok::objc_synthesize) &&
"ParseObjCPropertyDynamic(): Expected '@synthesize'");
ConsumeToken(); // consume synthesize
while (true) {
if (Tok.is(tok::code_completion)) {
Actions.CodeCompleteObjCPropertyDefinition(getCurScope());
cutOffParsing();
return 0;
}
if (Tok.isNot(tok::identifier)) {
Diag(Tok, diag::err_synthesized_property_name);
SkipUntil(tok::semi);
return 0;
}
IdentifierInfo *propertyIvar = 0;
IdentifierInfo *propertyId = Tok.getIdentifierInfo();
SourceLocation propertyLoc = ConsumeToken(); // consume property name
SourceLocation propertyIvarLoc;
if (Tok.is(tok::equal)) {
// property '=' ivar-name
ConsumeToken(); // consume '='
if (Tok.is(tok::code_completion)) {
Actions.CodeCompleteObjCPropertySynthesizeIvar(getCurScope(), propertyId);
cutOffParsing();
return 0;
}
if (Tok.isNot(tok::identifier)) {
Diag(Tok, diag::err_expected_ident);
break;
}
propertyIvar = Tok.getIdentifierInfo();
propertyIvarLoc = ConsumeToken(); // consume ivar-name
}
Actions.ActOnPropertyImplDecl(getCurScope(), atLoc, propertyLoc, true,
propertyId, propertyIvar, propertyIvarLoc);
if (Tok.isNot(tok::comma))
break;
ConsumeToken(); // consume ','
}
ExpectAndConsume(tok::semi, diag::err_expected_semi_after, "@synthesize");
return 0;
}
/// property-dynamic:
/// @dynamic property-list
///
/// property-list:
/// identifier
/// property-list ',' identifier
///
Decl *Parser::ParseObjCPropertyDynamic(SourceLocation atLoc) {
assert(Tok.isObjCAtKeyword(tok::objc_dynamic) &&
"ParseObjCPropertyDynamic(): Expected '@dynamic'");
ConsumeToken(); // consume dynamic
while (true) {
if (Tok.is(tok::code_completion)) {
Actions.CodeCompleteObjCPropertyDefinition(getCurScope());
cutOffParsing();
return 0;
}
if (Tok.isNot(tok::identifier)) {
Diag(Tok, diag::err_expected_ident);
SkipUntil(tok::semi);
return 0;
}
IdentifierInfo *propertyId = Tok.getIdentifierInfo();
SourceLocation propertyLoc = ConsumeToken(); // consume property name
Actions.ActOnPropertyImplDecl(getCurScope(), atLoc, propertyLoc, false,
propertyId, 0, SourceLocation());
if (Tok.isNot(tok::comma))
break;
ConsumeToken(); // consume ','
}
ExpectAndConsume(tok::semi, diag::err_expected_semi_after, "@dynamic");
return 0;
}
/// objc-throw-statement:
/// throw expression[opt];
///
StmtResult Parser::ParseObjCThrowStmt(SourceLocation atLoc) {
ExprResult Res;
ConsumeToken(); // consume throw
if (Tok.isNot(tok::semi)) {
Res = ParseExpression();
if (Res.isInvalid()) {
SkipUntil(tok::semi);
return StmtError();
}
}
// consume ';'
ExpectAndConsume(tok::semi, diag::err_expected_semi_after, "@throw");
return Actions.ActOnObjCAtThrowStmt(atLoc, Res.take(), getCurScope());
}
/// objc-synchronized-statement:
/// @synchronized '(' expression ')' compound-statement
///
StmtResult
Parser::ParseObjCSynchronizedStmt(SourceLocation atLoc) {
ConsumeToken(); // consume synchronized
if (Tok.isNot(tok::l_paren)) {
Diag(Tok, diag::err_expected_lparen_after) << "@synchronized";
return StmtError();
}
// The operand is surrounded with parentheses.
ConsumeParen(); // '('
ExprResult operand(ParseExpression());
if (Tok.is(tok::r_paren)) {
ConsumeParen(); // ')'
} else {
if (!operand.isInvalid())
Diag(Tok, diag::err_expected_rparen);
// Skip forward until we see a left brace, but don't consume it.
SkipUntil(tok::l_brace, true, true);
}
// Require a compound statement.
if (Tok.isNot(tok::l_brace)) {
if (!operand.isInvalid())
Diag(Tok, diag::err_expected_lbrace);
return StmtError();
}
// Check the @synchronized operand now.
if (!operand.isInvalid())
operand = Actions.ActOnObjCAtSynchronizedOperand(atLoc, operand.take());
// Parse the compound statement within a new scope.
ParseScope bodyScope(this, Scope::DeclScope);
StmtResult body(ParseCompoundStatementBody());
bodyScope.Exit();
// If there was a semantic or parse error earlier with the
// operand, fail now.
if (operand.isInvalid())
return StmtError();
if (body.isInvalid())
body = Actions.ActOnNullStmt(Tok.getLocation());
return Actions.ActOnObjCAtSynchronizedStmt(atLoc, operand.get(), body.get());
}
/// objc-try-catch-statement:
/// @try compound-statement objc-catch-list[opt]
/// @try compound-statement objc-catch-list[opt] @finally compound-statement
///
/// objc-catch-list:
/// @catch ( parameter-declaration ) compound-statement
/// objc-catch-list @catch ( catch-parameter-declaration ) compound-statement
/// catch-parameter-declaration:
/// parameter-declaration
/// '...' [OBJC2]
///
StmtResult Parser::ParseObjCTryStmt(SourceLocation atLoc) {
bool catch_or_finally_seen = false;
ConsumeToken(); // consume try
if (Tok.isNot(tok::l_brace)) {
Diag(Tok, diag::err_expected_lbrace);
return StmtError();
}
StmtVector CatchStmts(Actions);
StmtResult FinallyStmt;
ParseScope TryScope(this, Scope::DeclScope);
StmtResult TryBody(ParseCompoundStatementBody());
TryScope.Exit();
if (TryBody.isInvalid())
TryBody = Actions.ActOnNullStmt(Tok.getLocation());
while (Tok.is(tok::at)) {
// At this point, we need to lookahead to determine if this @ is the start
// of an @catch or @finally. We don't want to consume the @ token if this
// is an @try or @encode or something else.
Token AfterAt = GetLookAheadToken(1);
if (!AfterAt.isObjCAtKeyword(tok::objc_catch) &&
!AfterAt.isObjCAtKeyword(tok::objc_finally))
break;
SourceLocation AtCatchFinallyLoc = ConsumeToken();
if (Tok.isObjCAtKeyword(tok::objc_catch)) {
Decl *FirstPart = 0;
ConsumeToken(); // consume catch
if (Tok.is(tok::l_paren)) {
ConsumeParen();
ParseScope CatchScope(this, Scope::DeclScope|Scope::AtCatchScope);
if (Tok.isNot(tok::ellipsis)) {
DeclSpec DS(AttrFactory);
ParseDeclarationSpecifiers(DS);
Declarator ParmDecl(DS, Declarator::ObjCCatchContext);
ParseDeclarator(ParmDecl);
// Inform the actions module about the declarator, so it
// gets added to the current scope.
FirstPart = Actions.ActOnObjCExceptionDecl(getCurScope(), ParmDecl);
} else
ConsumeToken(); // consume '...'
SourceLocation RParenLoc;
if (Tok.is(tok::r_paren))
RParenLoc = ConsumeParen();
else // Skip over garbage, until we get to ')'. Eat the ')'.
SkipUntil(tok::r_paren, true, false);
StmtResult CatchBody(true);
if (Tok.is(tok::l_brace))
CatchBody = ParseCompoundStatementBody();
else
Diag(Tok, diag::err_expected_lbrace);
if (CatchBody.isInvalid())
CatchBody = Actions.ActOnNullStmt(Tok.getLocation());
StmtResult Catch = Actions.ActOnObjCAtCatchStmt(AtCatchFinallyLoc,
RParenLoc,
FirstPart,
CatchBody.take());
if (!Catch.isInvalid())
CatchStmts.push_back(Catch.release());
} else {
Diag(AtCatchFinallyLoc, diag::err_expected_lparen_after)
<< "@catch clause";
return StmtError();
}
catch_or_finally_seen = true;
} else {
assert(Tok.isObjCAtKeyword(tok::objc_finally) && "Lookahead confused?");
ConsumeToken(); // consume finally
ParseScope FinallyScope(this, Scope::DeclScope);
StmtResult FinallyBody(true);
if (Tok.is(tok::l_brace))
FinallyBody = ParseCompoundStatementBody();
else
Diag(Tok, diag::err_expected_lbrace);
if (FinallyBody.isInvalid())
FinallyBody = Actions.ActOnNullStmt(Tok.getLocation());
FinallyStmt = Actions.ActOnObjCAtFinallyStmt(AtCatchFinallyLoc,
FinallyBody.take());
catch_or_finally_seen = true;
break;
}
}
if (!catch_or_finally_seen) {
Diag(atLoc, diag::err_missing_catch_finally);
return StmtError();
}
return Actions.ActOnObjCAtTryStmt(atLoc, TryBody.take(),
move_arg(CatchStmts),
FinallyStmt.take());
}
/// objc-autoreleasepool-statement:
/// @autoreleasepool compound-statement
///
StmtResult
Parser::ParseObjCAutoreleasePoolStmt(SourceLocation atLoc) {
ConsumeToken(); // consume autoreleasepool
if (Tok.isNot(tok::l_brace)) {
Diag(Tok, diag::err_expected_lbrace);
return StmtError();
}
// Enter a scope to hold everything within the compound stmt. Compound
// statements can always hold declarations.
ParseScope BodyScope(this, Scope::DeclScope);
StmtResult AutoreleasePoolBody(ParseCompoundStatementBody());
BodyScope.Exit();
if (AutoreleasePoolBody.isInvalid())
AutoreleasePoolBody = Actions.ActOnNullStmt(Tok.getLocation());
return Actions.ActOnObjCAutoreleasePoolStmt(atLoc,
AutoreleasePoolBody.take());
}
/// objc-method-def: objc-method-proto ';'[opt] '{' body '}'
///
Decl *Parser::ParseObjCMethodDefinition() {
Decl *MDecl = ParseObjCMethodPrototype();
PrettyDeclStackTraceEntry CrashInfo(Actions, MDecl, Tok.getLocation(),
"parsing Objective-C method");
// parse optional ';'
if (Tok.is(tok::semi)) {
if (ObjCImpDecl) {
Diag(Tok, diag::warn_semicolon_before_method_body)
<< FixItHint::CreateRemoval(Tok.getLocation());
}
ConsumeToken();
}
// We should have an opening brace now.
if (Tok.isNot(tok::l_brace)) {
Diag(Tok, diag::err_expected_method_body);
// Skip over garbage, until we get to '{'. Don't eat the '{'.
SkipUntil(tok::l_brace, true, true);
// If we didn't find the '{', bail out.
if (Tok.isNot(tok::l_brace))
return 0;
}
// Allow the rest of sema to find private method decl implementations.
if (MDecl)
Actions.AddAnyMethodToGlobalPool(MDecl);
// Consume the tokens and store them for later parsing.
LexedMethod* LM = new LexedMethod(this, MDecl);
LateParsedObjCMethods.push_back(LM);
CachedTokens &Toks = LM->Toks;
// Begin by storing the '{' token.
Toks.push_back(Tok);
ConsumeBrace();
// Consume everything up to (and including) the matching right brace.
ConsumeAndStoreUntil(tok::r_brace, Toks, /*StopAtSemi=*/false);
return MDecl;
}
StmtResult Parser::ParseObjCAtStatement(SourceLocation AtLoc) {
if (Tok.is(tok::code_completion)) {
Actions.CodeCompleteObjCAtStatement(getCurScope());
cutOffParsing();
return StmtError();
}
if (Tok.isObjCAtKeyword(tok::objc_try))
return ParseObjCTryStmt(AtLoc);
if (Tok.isObjCAtKeyword(tok::objc_throw))
return ParseObjCThrowStmt(AtLoc);
if (Tok.isObjCAtKeyword(tok::objc_synchronized))
return ParseObjCSynchronizedStmt(AtLoc);
if (Tok.isObjCAtKeyword(tok::objc_autoreleasepool))
return ParseObjCAutoreleasePoolStmt(AtLoc);
ExprResult Res(ParseExpressionWithLeadingAt(AtLoc));
if (Res.isInvalid()) {
// If the expression is invalid, skip ahead to the next semicolon. Not
// doing this opens us up to the possibility of infinite loops if
// ParseExpression does not consume any tokens.
SkipUntil(tok::semi);
return StmtError();
}
// Otherwise, eat the semicolon.
ExpectAndConsumeSemi(diag::err_expected_semi_after_expr);
return Actions.ActOnExprStmt(Actions.MakeFullExpr(Res.take()));
}
ExprResult Parser::ParseObjCAtExpression(SourceLocation AtLoc) {
switch (Tok.getKind()) {
case tok::code_completion:
Actions.CodeCompleteObjCAtExpression(getCurScope());
cutOffParsing();
return ExprError();
case tok::string_literal: // primary-expression: string-literal
case tok::wide_string_literal:
return ParsePostfixExpressionSuffix(ParseObjCStringLiteral(AtLoc));
default:
if (Tok.getIdentifierInfo() == 0)
return ExprError(Diag(AtLoc, diag::err_unexpected_at));
switch (Tok.getIdentifierInfo()->getObjCKeywordID()) {
case tok::objc_encode:
return ParsePostfixExpressionSuffix(ParseObjCEncodeExpression(AtLoc));
case tok::objc_protocol:
return ParsePostfixExpressionSuffix(ParseObjCProtocolExpression(AtLoc));
case tok::objc_selector:
return ParsePostfixExpressionSuffix(ParseObjCSelectorExpression(AtLoc));
default:
return ExprError(Diag(AtLoc, diag::err_unexpected_at));
}
}
}
/// \brirg Parse the receiver of an Objective-C++ message send.
///
/// This routine parses the receiver of a message send in
/// Objective-C++ either as a type or as an expression. Note that this
/// routine must not be called to parse a send to 'super', since it
/// has no way to return such a result.
///
/// \param IsExpr Whether the receiver was parsed as an expression.
///
/// \param TypeOrExpr If the receiver was parsed as an expression (\c
/// IsExpr is true), the parsed expression. If the receiver was parsed
/// as a type (\c IsExpr is false), the parsed type.
///
/// \returns True if an error occurred during parsing or semantic
/// analysis, in which case the arguments do not have valid
/// values. Otherwise, returns false for a successful parse.
///
/// objc-receiver: [C++]
/// 'super' [not parsed here]
/// expression
/// simple-type-specifier
/// typename-specifier
bool Parser::ParseObjCXXMessageReceiver(bool &IsExpr, void *&TypeOrExpr) {
InMessageExpressionRAIIObject InMessage(*this, true);
if (Tok.is(tok::identifier) || Tok.is(tok::coloncolon) ||
Tok.is(tok::kw_typename) || Tok.is(tok::annot_cxxscope))
TryAnnotateTypeOrScopeToken();
if (!isCXXSimpleTypeSpecifier()) {
// objc-receiver:
// expression
ExprResult Receiver = ParseExpression();
if (Receiver.isInvalid())
return true;
IsExpr = true;
TypeOrExpr = Receiver.take();
return false;
}
// objc-receiver:
// typename-specifier
// simple-type-specifier
// expression (that starts with one of the above)
DeclSpec DS(AttrFactory);
ParseCXXSimpleTypeSpecifier(DS);
if (Tok.is(tok::l_paren)) {
// If we see an opening parentheses at this point, we are
// actually parsing an expression that starts with a
// function-style cast, e.g.,
//
// postfix-expression:
// simple-type-specifier ( expression-list [opt] )
// typename-specifier ( expression-list [opt] )
//
// Parse the remainder of this case, then the (optional)
// postfix-expression suffix, followed by the (optional)
// right-hand side of the binary expression. We have an
// instance method.
ExprResult Receiver = ParseCXXTypeConstructExpression(DS);
if (!Receiver.isInvalid())
Receiver = ParsePostfixExpressionSuffix(Receiver.take());
if (!Receiver.isInvalid())
Receiver = ParseRHSOfBinaryExpression(Receiver.take(), prec::Comma);
if (Receiver.isInvalid())
return true;
IsExpr = true;
TypeOrExpr = Receiver.take();
return false;
}
// We have a class message. Turn the simple-type-specifier or
// typename-specifier we parsed into a type and parse the
// remainder of the class message.
Declarator DeclaratorInfo(DS, Declarator::TypeNameContext);
TypeResult Type = Actions.ActOnTypeName(getCurScope(), DeclaratorInfo);
if (Type.isInvalid())
return true;
IsExpr = false;
TypeOrExpr = Type.get().getAsOpaquePtr();
return false;
}
/// \brief Determine whether the parser is currently referring to a an
/// Objective-C message send, using a simplified heuristic to avoid overhead.
///
/// This routine will only return true for a subset of valid message-send
/// expressions.
bool Parser::isSimpleObjCMessageExpression() {
assert(Tok.is(tok::l_square) && getLang().ObjC1 &&
"Incorrect start for isSimpleObjCMessageExpression");
return GetLookAheadToken(1).is(tok::identifier) &&
GetLookAheadToken(2).is(tok::identifier);
}
bool Parser::isStartOfObjCClassMessageMissingOpenBracket() {
if (!getLang().ObjC1 || !NextToken().is(tok::identifier) ||
InMessageExpression)
return false;
ParsedType Type;
if (Tok.is(tok::annot_typename))
Type = getTypeAnnotation(Tok);
else if (Tok.is(tok::identifier))
Type = Actions.getTypeName(*Tok.getIdentifierInfo(), Tok.getLocation(),
getCurScope());
else
return false;
if (!Type.get().isNull() && Type.get()->isObjCObjectOrInterfaceType()) {
const Token &AfterNext = GetLookAheadToken(2);
if (AfterNext.is(tok::colon) || AfterNext.is(tok::r_square)) {
if (Tok.is(tok::identifier))
TryAnnotateTypeOrScopeToken();
return Tok.is(tok::annot_typename);
}
}
return false;
}
/// objc-message-expr:
/// '[' objc-receiver objc-message-args ']'
///
/// objc-receiver: [C]
/// 'super'
/// expression
/// class-name
/// type-name
///
ExprResult Parser::ParseObjCMessageExpression() {
assert(Tok.is(tok::l_square) && "'[' expected");
SourceLocation LBracLoc = ConsumeBracket(); // consume '['
if (Tok.is(tok::code_completion)) {
Actions.CodeCompleteObjCMessageReceiver(getCurScope());
cutOffParsing();
return ExprError();
}
InMessageExpressionRAIIObject InMessage(*this, true);
if (getLang().CPlusPlus) {
// We completely separate the C and C++ cases because C++ requires
// more complicated (read: slower) parsing.
// Handle send to super.
// FIXME: This doesn't benefit from the same typo-correction we
// get in Objective-C.
if (Tok.is(tok::identifier) && Tok.getIdentifierInfo() == Ident_super &&
NextToken().isNot(tok::period) && getCurScope()->isInObjcMethodScope())
return ParseObjCMessageExpressionBody(LBracLoc, ConsumeToken(),
ParsedType(), 0);
// Parse the receiver, which is either a type or an expression.
bool IsExpr;
void *TypeOrExpr = NULL;
if (ParseObjCXXMessageReceiver(IsExpr, TypeOrExpr)) {
SkipUntil(tok::r_square);
return ExprError();
}
if (IsExpr)
return ParseObjCMessageExpressionBody(LBracLoc, SourceLocation(),
ParsedType(),
static_cast<Expr*>(TypeOrExpr));
return ParseObjCMessageExpressionBody(LBracLoc, SourceLocation(),
ParsedType::getFromOpaquePtr(TypeOrExpr),
0);
}
if (Tok.is(tok::identifier)) {
IdentifierInfo *Name = Tok.getIdentifierInfo();
SourceLocation NameLoc = Tok.getLocation();
ParsedType ReceiverType;
switch (Actions.getObjCMessageKind(getCurScope(), Name, NameLoc,
Name == Ident_super,
NextToken().is(tok::period),
ReceiverType)) {
case Sema::ObjCSuperMessage:
return ParseObjCMessageExpressionBody(LBracLoc, ConsumeToken(),
ParsedType(), 0);
case Sema::ObjCClassMessage:
if (!ReceiverType) {
SkipUntil(tok::r_square);
return ExprError();
}
ConsumeToken(); // the type name
return ParseObjCMessageExpressionBody(LBracLoc, SourceLocation(),
ReceiverType, 0);
case Sema::ObjCInstanceMessage:
// Fall through to parse an expression.
break;
}
}
// Otherwise, an arbitrary expression can be the receiver of a send.
ExprResult Res(ParseExpression());
if (Res.isInvalid()) {
SkipUntil(tok::r_square);
return move(Res);
}
return ParseObjCMessageExpressionBody(LBracLoc, SourceLocation(),
ParsedType(), Res.take());
}
/// \brief Parse the remainder of an Objective-C message following the
/// '[' objc-receiver.
///
/// This routine handles sends to super, class messages (sent to a
/// class name), and instance messages (sent to an object), and the
/// target is represented by \p SuperLoc, \p ReceiverType, or \p
/// ReceiverExpr, respectively. Only one of these parameters may have
/// a valid value.
///
/// \param LBracLoc The location of the opening '['.
///
/// \param SuperLoc If this is a send to 'super', the location of the
/// 'super' keyword that indicates a send to the superclass.
///
/// \param ReceiverType If this is a class message, the type of the
/// class we are sending a message to.
///
/// \param ReceiverExpr If this is an instance message, the expression
/// used to compute the receiver object.
///
/// objc-message-args:
/// objc-selector
/// objc-keywordarg-list
///
/// objc-keywordarg-list:
/// objc-keywordarg
/// objc-keywordarg-list objc-keywordarg
///
/// objc-keywordarg:
/// selector-name[opt] ':' objc-keywordexpr
///
/// objc-keywordexpr:
/// nonempty-expr-list
///
/// nonempty-expr-list:
/// assignment-expression
/// nonempty-expr-list , assignment-expression
///
ExprResult
Parser::ParseObjCMessageExpressionBody(SourceLocation LBracLoc,
SourceLocation SuperLoc,
ParsedType ReceiverType,
ExprArg ReceiverExpr) {
InMessageExpressionRAIIObject InMessage(*this, true);
if (Tok.is(tok::code_completion)) {
if (SuperLoc.isValid())
Actions.CodeCompleteObjCSuperMessage(getCurScope(), SuperLoc, 0, 0,
false);
else if (ReceiverType)
Actions.CodeCompleteObjCClassMessage(getCurScope(), ReceiverType, 0, 0,
false);
else
Actions.CodeCompleteObjCInstanceMessage(getCurScope(), ReceiverExpr,
0, 0, false);
cutOffParsing();
return ExprError();
}
// Parse objc-selector
SourceLocation Loc;
IdentifierInfo *selIdent = ParseObjCSelectorPiece(Loc);
SmallVector<IdentifierInfo *, 12> KeyIdents;
SmallVector<SourceLocation, 12> KeyLocs;
ExprVector KeyExprs(Actions);
if (Tok.is(tok::colon)) {
while (1) {
// Each iteration parses a single keyword argument.
KeyIdents.push_back(selIdent);
KeyLocs.push_back(Loc);
if (Tok.isNot(tok::colon)) {
Diag(Tok, diag::err_expected_colon);
// We must manually skip to a ']', otherwise the expression skipper will
// stop at the ']' when it skips to the ';'. We want it to skip beyond
// the enclosing expression.
SkipUntil(tok::r_square);
return ExprError();
}
ConsumeToken(); // Eat the ':'.
/// Parse the expression after ':'
if (Tok.is(tok::code_completion)) {
if (SuperLoc.isValid())
Actions.CodeCompleteObjCSuperMessage(getCurScope(), SuperLoc,
KeyIdents.data(),
KeyIdents.size(),
/*AtArgumentEpression=*/true);
else if (ReceiverType)
Actions.CodeCompleteObjCClassMessage(getCurScope(), ReceiverType,
KeyIdents.data(),
KeyIdents.size(),
/*AtArgumentEpression=*/true);
else
Actions.CodeCompleteObjCInstanceMessage(getCurScope(), ReceiverExpr,
KeyIdents.data(),
KeyIdents.size(),
/*AtArgumentEpression=*/true);
cutOffParsing();
return ExprError();
}
ExprResult Res(ParseAssignmentExpression());
if (Res.isInvalid()) {
// We must manually skip to a ']', otherwise the expression skipper will
// stop at the ']' when it skips to the ';'. We want it to skip beyond
// the enclosing expression.
SkipUntil(tok::r_square);
return move(Res);
}
// We have a valid expression.
KeyExprs.push_back(Res.release());
// Code completion after each argument.
if (Tok.is(tok::code_completion)) {
if (SuperLoc.isValid())
Actions.CodeCompleteObjCSuperMessage(getCurScope(), SuperLoc,
KeyIdents.data(),
KeyIdents.size(),
/*AtArgumentEpression=*/false);
else if (ReceiverType)
Actions.CodeCompleteObjCClassMessage(getCurScope(), ReceiverType,
KeyIdents.data(),
KeyIdents.size(),
/*AtArgumentEpression=*/false);
else
Actions.CodeCompleteObjCInstanceMessage(getCurScope(), ReceiverExpr,
KeyIdents.data(),
KeyIdents.size(),
/*AtArgumentEpression=*/false);
cutOffParsing();
return ExprError();
}
// Check for another keyword selector.
selIdent = ParseObjCSelectorPiece(Loc);
if (!selIdent && Tok.isNot(tok::colon))
break;
// We have a selector or a colon, continue parsing.
}
// Parse the, optional, argument list, comma separated.
while (Tok.is(tok::comma)) {
ConsumeToken(); // Eat the ','.
/// Parse the expression after ','
ExprResult Res(ParseAssignmentExpression());
if (Res.isInvalid()) {
// We must manually skip to a ']', otherwise the expression skipper will
// stop at the ']' when it skips to the ';'. We want it to skip beyond
// the enclosing expression.
SkipUntil(tok::r_square);
return move(Res);
}
// We have a valid expression.
KeyExprs.push_back(Res.release());
}
} else if (!selIdent) {
Diag(Tok, diag::err_expected_ident); // missing selector name.
// We must manually skip to a ']', otherwise the expression skipper will
// stop at the ']' when it skips to the ';'. We want it to skip beyond
// the enclosing expression.
SkipUntil(tok::r_square);
return ExprError();
}
if (Tok.isNot(tok::r_square)) {
if (Tok.is(tok::identifier))
Diag(Tok, diag::err_expected_colon);
else
Diag(Tok, diag::err_expected_rsquare);
// We must manually skip to a ']', otherwise the expression skipper will
// stop at the ']' when it skips to the ';'. We want it to skip beyond
// the enclosing expression.
SkipUntil(tok::r_square);
return ExprError();
}
SourceLocation RBracLoc = ConsumeBracket(); // consume ']'
unsigned nKeys = KeyIdents.size();
if (nKeys == 0) {
KeyIdents.push_back(selIdent);
KeyLocs.push_back(Loc);
}
Selector Sel = PP.getSelectorTable().getSelector(nKeys, &KeyIdents[0]);
if (SuperLoc.isValid())
return Actions.ActOnSuperMessage(getCurScope(), SuperLoc, Sel,
LBracLoc, KeyLocs, RBracLoc,
MultiExprArg(Actions,
KeyExprs.take(),
KeyExprs.size()));
else if (ReceiverType)
return Actions.ActOnClassMessage(getCurScope(), ReceiverType, Sel,
LBracLoc, KeyLocs, RBracLoc,
MultiExprArg(Actions,
KeyExprs.take(),
KeyExprs.size()));
return Actions.ActOnInstanceMessage(getCurScope(), ReceiverExpr, Sel,
LBracLoc, KeyLocs, RBracLoc,
MultiExprArg(Actions,
KeyExprs.take(),
KeyExprs.size()));
}
ExprResult Parser::ParseObjCStringLiteral(SourceLocation AtLoc) {
ExprResult Res(ParseStringLiteralExpression());
if (Res.isInvalid()) return move(Res);
// @"foo" @"bar" is a valid concatenated string. Eat any subsequent string
// expressions. At this point, we know that the only valid thing that starts
// with '@' is an @"".
SmallVector<SourceLocation, 4> AtLocs;
ExprVector AtStrings(Actions);
AtLocs.push_back(AtLoc);
AtStrings.push_back(Res.release());
while (Tok.is(tok::at)) {
AtLocs.push_back(ConsumeToken()); // eat the @.
// Invalid unless there is a string literal.
if (!isTokenStringLiteral())
return ExprError(Diag(Tok, diag::err_objc_concat_string));
ExprResult Lit(ParseStringLiteralExpression());
if (Lit.isInvalid())
return move(Lit);
AtStrings.push_back(Lit.release());
}
return Owned(Actions.ParseObjCStringLiteral(&AtLocs[0], AtStrings.take(),
AtStrings.size()));
}
/// objc-encode-expression:
/// @encode ( type-name )
ExprResult
Parser::ParseObjCEncodeExpression(SourceLocation AtLoc) {
assert(Tok.isObjCAtKeyword(tok::objc_encode) && "Not an @encode expression!");
SourceLocation EncLoc = ConsumeToken();
if (Tok.isNot(tok::l_paren))
return ExprError(Diag(Tok, diag::err_expected_lparen_after) << "@encode");
BalancedDelimiterTracker T(*this, tok::l_paren);
T.consumeOpen();
TypeResult Ty = ParseTypeName();
T.consumeClose();
if (Ty.isInvalid())
return ExprError();
return Owned(Actions.ParseObjCEncodeExpression(AtLoc, EncLoc,
T.getOpenLocation(), Ty.get(),
T.getCloseLocation()));
}
/// objc-protocol-expression
/// @protocol ( protocol-name )
ExprResult
Parser::ParseObjCProtocolExpression(SourceLocation AtLoc) {
SourceLocation ProtoLoc = ConsumeToken();
if (Tok.isNot(tok::l_paren))
return ExprError(Diag(Tok, diag::err_expected_lparen_after) << "@protocol");
BalancedDelimiterTracker T(*this, tok::l_paren);
T.consumeOpen();
if (Tok.isNot(tok::identifier))
return ExprError(Diag(Tok, diag::err_expected_ident));
IdentifierInfo *protocolId = Tok.getIdentifierInfo();
ConsumeToken();
T.consumeClose();
return Owned(Actions.ParseObjCProtocolExpression(protocolId, AtLoc, ProtoLoc,
T.getOpenLocation(),
T.getCloseLocation()));
}
/// objc-selector-expression
/// @selector '(' objc-keyword-selector ')'
ExprResult Parser::ParseObjCSelectorExpression(SourceLocation AtLoc) {
SourceLocation SelectorLoc = ConsumeToken();
if (Tok.isNot(tok::l_paren))
return ExprError(Diag(Tok, diag::err_expected_lparen_after) << "@selector");
SmallVector<IdentifierInfo *, 12> KeyIdents;
SourceLocation sLoc;
BalancedDelimiterTracker T(*this, tok::l_paren);
T.consumeOpen();
if (Tok.is(tok::code_completion)) {
Actions.CodeCompleteObjCSelector(getCurScope(), KeyIdents.data(),
KeyIdents.size());
cutOffParsing();
return ExprError();
}
IdentifierInfo *SelIdent = ParseObjCSelectorPiece(sLoc);
if (!SelIdent && // missing selector name.
Tok.isNot(tok::colon) && Tok.isNot(tok::coloncolon))
return ExprError(Diag(Tok, diag::err_expected_ident));
KeyIdents.push_back(SelIdent);
unsigned nColons = 0;
if (Tok.isNot(tok::r_paren)) {
while (1) {
if (Tok.is(tok::coloncolon)) { // Handle :: in C++.
++nColons;
KeyIdents.push_back(0);
} else if (Tok.isNot(tok::colon))
return ExprError(Diag(Tok, diag::err_expected_colon));
++nColons;
ConsumeToken(); // Eat the ':' or '::'.
if (Tok.is(tok::r_paren))
break;
if (Tok.is(tok::code_completion)) {
Actions.CodeCompleteObjCSelector(getCurScope(), KeyIdents.data(),
KeyIdents.size());
cutOffParsing();
return ExprError();
}
// Check for another keyword selector.
SourceLocation Loc;
SelIdent = ParseObjCSelectorPiece(Loc);
KeyIdents.push_back(SelIdent);
if (!SelIdent && Tok.isNot(tok::colon) && Tok.isNot(tok::coloncolon))
break;
}
}
T.consumeClose();
Selector Sel = PP.getSelectorTable().getSelector(nColons, &KeyIdents[0]);
return Owned(Actions.ParseObjCSelectorExpression(Sel, AtLoc, SelectorLoc,
T.getOpenLocation(),
T.getCloseLocation()));
}
Decl *Parser::ParseLexedObjCMethodDefs(LexedMethod &LM) {
assert(!LM.Toks.empty() && "ParseLexedObjCMethodDef - Empty body!");
// Append the current token at the end of the new token stream so that it
// doesn't get lost.
LM.Toks.push_back(Tok);
PP.EnterTokenStream(LM.Toks.data(), LM.Toks.size(), true, false);
// MDecl might be null due to error in method prototype, etc.
Decl *MDecl = LM.D;
// Consume the previously pushed token.
ConsumeAnyToken();
assert(Tok.is(tok::l_brace) && "Inline objective-c method not starting with '{'");
SourceLocation BraceLoc = Tok.getLocation();
// Enter a scope for the method body.
ParseScope BodyScope(this,
Scope::ObjCMethodScope|Scope::FnScope|Scope::DeclScope);
// Tell the actions module that we have entered a method definition with the
// specified Declarator for the method.
Actions.ActOnStartOfObjCMethodDef(getCurScope(), MDecl);
if (PP.isCodeCompletionEnabled()) {
if (trySkippingFunctionBodyForCodeCompletion()) {
BodyScope.Exit();
return Actions.ActOnFinishFunctionBody(MDecl, 0);
}
}
StmtResult FnBody(ParseCompoundStatementBody());
// If the function body could not be parsed, make a bogus compoundstmt.
if (FnBody.isInvalid())
FnBody = Actions.ActOnCompoundStmt(BraceLoc, BraceLoc,
MultiStmtArg(Actions), false);
// Leave the function body scope.
BodyScope.Exit();
return Actions.ActOnFinishFunctionBody(MDecl, FnBody.take());
}
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