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grammarcpp.ebnf
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import "grammarcppcommon.ebnf";
option startTokenID = 1000;
option startNonterminalID = 2000;
option startProductionID = 3000;
// Section basic.link
TranslationUnit @noOptEmpty
= DeclarationSeq
;
// Section expr.prim.general
PrimaryExpression @directUnwrap
= <LiteralS
| "this"
| "(" Expression ")"
| <IdExpression
| <LambdaExpression
| <StatementExpression
| <FoldExpression
;
StatementExpression // gcc extension: https://gcc.gnu.org/onlinedocs/gcc-5.3.0/gcc/Statement-Exprs.html
= "(" CompoundStatement ")"
;
IdExpression @directUnwrap
= <UnqualifiedId
| <QualifiedId
;
UnqualifiedId @directUnwrap
= <NameIdentifier
| <OperatorFunctionId
| <ConversionFunctionId
| LiteralOperatorId
| "~" ClassName
| "~" DecltypeSpecifier
| <TemplateId
;
NameIdentifier @directUnwrap
= Identifier
;
QualifiedId
= NestedNameSpecifier "template"? UnqualifiedId
//| "::" NameIdentifier
| "::" OperatorFunctionId
| "::" LiteralOperatorId
| "::" TemplateId
;
NestedNameSpecifier
= "::" @tag(NestedNameSpecifierStart)
| TypeName "::"
//| NamespaceName "::"
| DecltypeSpecifier "::"
| @inheritTag(NestedNameSpecifierStart) NestedNameSpecifier NameIdentifier "::"
| @inheritTag(NestedNameSpecifierStart) NestedNameSpecifier "template"? SimpleTemplateId "::"
;
// Section expr.prim.lambda
LambdaExpression
= LambdaIntroducer LambdaDeclarator? CompoundStatement
;
LambdaIntroducer
= "[" LambdaCapture? "]"
;
LambdaCapture
= <CaptureDefault
| CaptureList
| CaptureDefault "," CaptureList
;
CaptureDefault
= "&"
| "="
;
CaptureList @array
= Capture "..."?
| CaptureList "," Capture "..."?
;
Capture
= <SimpleCapture
| <InitCapture
;
SimpleCapture
= Identifier
| "&" Identifier
| "this"
;
InitCapture
= Identifier Initializer
| "&" Identifier Initializer
;
LambdaDeclarator
= "(" ParameterDeclarationClause ")" "mutable"? ExceptionSpecification? AttributeSpecifierSeq TrailingReturnType?
;
// Section expr.prim.fold
FoldExpression
= "(" CastExpression FoldOperator "..." ")"
| "(" "..." FoldOperator CastExpression ")"
| "(" CastExpression FoldOperator "..." FoldOperator CastExpression ")"
;
FoldOperator
= "+"
| "-"
| "*"
| "/"
| "%"
| "^"
| "&"
| "|"
| "<<"
| ">" ">"
| "+="
| "-="
| "*="
| "/="
| "%="
| "^="
| "&="
| "|="
| "<<="
| ">>="
| "="
| "=="
| "!="
| "<"
| ">"
| "<="
| ">="
| "&&"
| "||"
| ","
| ".*"
| "->*"
;
// Section expr.post
PostfixExpression @directUnwrap
= <PrimaryExpression
| PostfixExpression "[" Expression "]"
| PostfixExpression "[" BracedInitList? "]"
| TypeOrPostfixExpression "(" ExpressionList? ")"
| SimpleTypeSpecifier BracedInitList
| TypenameSpecifier BracedInitList
| PostfixExpression "." "template"? !"~" IdExpression
| PostfixExpression "->" "template"? !"~" IdExpression
| PostfixExpression "." PseudoDestructorName
| PostfixExpression "->" PseudoDestructorName
| PostfixExpression "++"
| PostfixExpression "--"
| "dynamic_cast" "<" TypeId ">" "(" Expression ")"
| "static_cast" "<" TypeId ">" "(" Expression ")"
| "reinterpret_cast" "<" TypeId ">" "(" Expression ")"
| "const_cast" "<" TypeId ">" "(" Expression ")"
| "typeid" "(" Expression ")"
| "typeid" "(" TypeId ")"
;
TypeOrPostfixExpression = <TypeOrPostfixExpression2;
TypeOrPostfixExpression2 @directUnwrap
= <PostfixExpression
| <SimpleTypeSpecifier
| <TypenameSpecifier
;
ExpressionList @array
= <InitializerList
;
PseudoDestructorName
= NestedNameSpecifier? TypeName "::" "~" TypeName
| NestedNameSpecifier "template" SimpleTemplateId "::" "~" TypeName
| NestedNameSpecifier? "~" TypeName
| "~" DecltypeSpecifier
;
// Section expr.unary
UnaryExpression @noGlrEarlyReduce
= <PostfixExpression
| "++" CastExpression
| "--" CastExpression
| "~" CastExpression
| "__extension__" CastExpression
| "+" CastExpression
| "-" CastExpression
| "!" CastExpression
| "*" CastExpression
| "&" CastExpression
| "sizeof" UnaryExpression
| "sizeof" "(" TypeId ")"
| "sizeof" "..." "(" Identifier ")"
| "alignof" "(" TypeId ")"
| <NoexceptExpression
| <NewExpression
| <DeleteExpression
| "__alignof__" "(" TypeId ")" // http://gcc.gnu.org/onlinedocs/gcc-3.2.2/gcc/Alignment.html
| "__alignof__" "(" Expression ")" // http://gcc.gnu.org/onlinedocs/gcc-3.2.2/gcc/Alignment.html
| "__builtin_offsetof" "(" TypeId "," Identifier ")" // https://gcc.gnu.org/onlinedocs/gcc-4.5.3/gcc/Offsetof.html
| "__builtin_va_arg" "(" Expression "," TypeId ")"
| "__builtin_va_start" "(" Expression "," Expression ")"
| "__builtin_va_end" "(" Expression ")"
| "__builtin_va_copy" "(" Expression "," Expression ")"
;
// Section expr.new
NewExpression
= "::"? "new" NewPlacement? NewTypeId NewInitializer?
| "::"? "new" NewPlacement? "(" TypeId ")" NewInitializer?
;
NewPlacement
= "(" ExpressionList ")"
;
NewTypeId
= TypeSpecifierSeq NewDeclarator?
;
NewDeclarator
= PtrOperator innerDeclarator:NewDeclarator?
| <NoptrNewDeclarator
;
NoptrNewDeclarator
= "[" Expression "]" AttributeSpecifierSeq
| innerDeclarator:NoptrNewDeclarator "[" ConstantExpression "]" AttributeSpecifierSeq
;
NewInitializer
= "(" ExpressionList? ")"
| <BracedInitList
;
// Section expr.delete
DeleteExpression
= "::"? "delete" CastExpression
| "::"? "delete" "[" "]" CastExpression
;
// Section expr.unary.noexcept
NoexceptExpression
= "noexcept" "(" Expression ")"
;
// Section expr.cast
CastExpression
= <UnaryExpression
| "(" TypeId ")" CastExpression
| <CompoundLiteralExpression // https://en.cppreference.com/w/c/language/compound_literal
;
CompoundLiteralExpression
= "(" TypeId ")" BracedInitList
;
// Section expr.mptr.oper
PmExpression
= <CastExpression
| PmExpression ".*" CastExpression
| PmExpression "->*" CastExpression
;
// Section expr.mul
MultiplicativeExpression @directUnwrap
= <PmExpression
| MultiplicativeExpression "*" PmExpression
| MultiplicativeExpression "/" PmExpression
| MultiplicativeExpression "%" PmExpression
;
// Section expr.add
AdditiveExpression @directUnwrap
= <MultiplicativeExpression
| AdditiveExpression "+" MultiplicativeExpression
| AdditiveExpression "-" MultiplicativeExpression
;
// Section expr.shift
ShiftExpression @directUnwrap
= <AdditiveExpression
| @inheritTag(hasGreater) ShiftExpression "<<" AdditiveExpression
| @inheritTag(hasGreater) ShiftExpression ">" ">" AdditiveExpression @tag(hasGreater)
;
// Section expr.rel
RelationalExpression @directUnwrap
= <ShiftExpression
| @inheritTag(hasGreater) RelationalExpression "<" ShiftExpression
| @inheritTag(hasGreater) RelationalExpression ">" ShiftExpression @tag(hasGreater)
| @inheritTag(hasGreater) RelationalExpression "<=" ShiftExpression
| @inheritTag(hasGreater) RelationalExpression ">=" ShiftExpression
;
// Section expr.eq
EqualityExpression @directUnwrap
= <RelationalExpression
| @inheritTag(hasGreater) EqualityExpression "==" RelationalExpression
| @inheritTag(hasGreater) EqualityExpression "!=" RelationalExpression
;
// Section expr.bit.and
AndExpression @directUnwrap
= <EqualityExpression
| @inheritTag(hasGreater) AndExpression "&" EqualityExpression
;
// Section expr.xor
ExclusiveOrExpression @directUnwrap
= <AndExpression
| @inheritTag(hasGreater) ExclusiveOrExpression "^" AndExpression
;
// Section expr.or
InclusiveOrExpression @directUnwrap
= <ExclusiveOrExpression
| @inheritTag(hasGreater) InclusiveOrExpression "|" ExclusiveOrExpression
;
// Section expr.log.and
LogicalAndExpression @directUnwrap
= <InclusiveOrExpression
| @inheritTag(hasGreater) LogicalAndExpression "&&" InclusiveOrExpression
;
// Section expr.log.or
LogicalOrExpression @directUnwrap
= <LogicalAndExpression
| @inheritTag(hasGreater) LogicalOrExpression "||" LogicalAndExpression
;
// Section expr.cond
ConditionalExpression @directUnwrap
= <LogicalOrExpression
| @inheritTag(hasGreater) LogicalOrExpression "?" Expression ":" AssignmentExpression
;
// Section expr.ass
AssignmentExpression @directUnwrap
= <ConditionalExpression
| LogicalOrExpression AssignmentOperator InitializerClause
| <ThrowExpression
;
AssignmentOperator
= "="
| "*="
| "/="
| "%="
| "+="
| "-="
| ">>="
| "<<="
| "&="
| "^="
| "|="
;
// Section expr.comma
Expression @start
= <AssignmentExpression
| <CommaExpression
;
CommaExpression
= Expression "," AssignmentExpression
;
// Section expr.const
ConstantExpression @directUnwrap
= <ConditionalExpression
;
// Section stmt.stmt
Statement
= <LabelStatement
| EmptyStatement
| AttributeSpecifierSeq ExpressionStatement
| AttributeSpecifierSeq CompoundStatement
| AttributeSpecifierSeq SelectionStatement
| AttributeSpecifierSeq IterationStatement
| AttributeSpecifierSeq JumpStatement
| <DeclarationStatement
| AttributeSpecifierSeq TryBlock
;
EmptyStatement
= ";"
;
// Section stmt.label
LabelStatement
= AttributeSpecifierSeq Identifier ":"
| AttributeSpecifierSeq "case" ConstantExpression ":"
| AttributeSpecifierSeq "default" ":"
;
// Section stmt.expr
ExpressionStatement
= Expression ";"
;
// Section stmt.block
CompoundStatement
= "{" StatementSeq "}"
;
StatementSeq @array
= @empty
| StatementSeq Statement
;
// Section stmt.select
SelectionStatement
= "if" "(" Condition ")" Statement !"else"
| "if" "(" Condition ")" Statement "else" Statement
| "if" "constexpr" "(" Condition ")" Statement !"else"
| "if" "constexpr" "(" Condition ")" Statement "else" Statement
| "switch" "(" Condition ")" Statement
;
Condition
= <Expression
| declSeq:DeclSpecifierSeq declarators:Declarator "=" InitializerClause
| declSeq:DeclSpecifierSeq declarators:Declarator BracedInitList
;
// Section stmt.iter
IterationStatement
= "while" "(" Condition ")" Statement
| DoWhileStatement ";"
| "for" "(" ForInitStatement Condition? ";" Expression? ")" Statement
| "for" "(" ForRangeDeclaration ":" ForRangeInitializer ")" Statement
;
DoWhileStatement
= "do" Statement "while" "(" Expression ")"
;
ForInitStatement
= <ExpressionStatement
| <SimpleDeclaration1
| <EmptyStatement
;
ForRangeDeclaration
= AttributeSpecifierSeq TypeSpecifierSeq Declarator
;
ForRangeInitializer
= Expression
| BracedInitList
;
// Section stmt.jump
JumpStatement
= JumpStatement2 ";"
;
JumpStatement2
= "break"
| "continue"
| "return" Expression?
| "return" BracedInitList
| "goto" Identifier
;
// Section stmt.dcl
DeclarationStatement
= <BlockDeclaration
;
// Section dcl.dcl
DeclarationSeq @array @noOptEmpty
= @empty
| DeclarationSeq Declaration
| DeclarationSeq LinkageSpecification
;
Declaration
= <BlockDeclaration
| <SimpleDeclaration2
| <FunctionDefinitionGlobal
| <TemplateDeclaration
| <ExplicitInstantiation
| <ExplicitSpecialization
| <NamespaceDefinition
| <EmptyDeclaration
| <AttributeDeclaration
;
Declaration2
= <Declaration
| LinkageSpecification
;
BlockDeclaration
= <SimpleDeclaration1
// | <AsmDefinition
| <NamespaceAliasDefinition
| <UsingDeclaration
| <UsingDirective
| <StaticAssertDeclaration
| <AliasDeclaration
| <OpaqueEnumDeclaration
;
AliasDeclaration
= "using" Identifier AttributeSpecifierSeq? "=" TypeId ";"
;
SimpleDeclaration1
= <SimpleDeclaration3
| declSeq:DeclSpecifierSeq declarators:InitDeclaratorList ";"
| declSeq:DeclSpecifierSeqStructuredBinding RefQualifier? "[" IdentifierList "]" Initializer ";"
;
SimpleDeclaration3
= declSeq:DeclSpecifierSeq ";"
;
SimpleDeclaration2
= declarators:InitDeclaratorList ";"
;
StaticAssertDeclaration
= StaticAssertDeclarationX ";"
;
StaticAssertDeclarationX
= "static_assert" "(" ConstantExpression "," StringLiteralSequence ")"
| "static_assert" "(" ConstantExpression ")"
| "_Static_assert" "(" ConstantExpression "," StringLiteralSequence ")"
| "_Static_assert" "(" ConstantExpression ")"
;
EmptyDeclaration
= ";"
;
AttributeDeclaration
= AttributeSpecifierSeqPlus ";"
;
// Section dcl.spec
DeclSpecifier @directUnwrap
= <StorageClassSpecifier
//| <TypeSpecifier
//| <TypeKeyword
//| <SimpleTypeSpecifierNoKeyword
//| <ElaboratedTypeSpecifier
//| <TypenameSpecifier
| <CvQualifier
//| <ClassSpecifier
//| <EnumSpecifier
| <FunctionSpecifier
| "friend"
| "constexpr"
| "__extension__"
| "__cdecl"
| <AttributeSpecifier
;
DeclSpecifierTypedef
= "typedef"
;
DeclSpecifierAll @directUnwrap
= <DeclSpecifier
| <DeclSpecifierTypedef
;
DeclSpecifierTypeKeyword @directUnwrap
= <DeclSpecifierAll
| <TypeKeyword
;
DeclSpecifierSeq
= DeclSpecifierSeqArr
;
DeclSpecifierSeqArr @array @regArray
= DeclSpecifier+
| DeclSpecifierTypeKeyword* DeclSpecifierAll DeclSpecifierTypeKeyword* TypeKeyword DeclSpecifierTypeKeyword*
| DeclSpecifierTypeKeyword* TypeKeyword DeclSpecifierTypeKeyword* DeclSpecifierAll DeclSpecifierTypeKeyword*
| TypeKeyword+
| DeclSpecifierAll* SimpleTypeSpecifierNoKeyword DeclSpecifierAll*
| DeclSpecifierAll* ElaboratedTypeSpecifier DeclSpecifierAll*
| DeclSpecifierAll* ClassSpecifier DeclSpecifierAll*
| DeclSpecifierAll* EnumSpecifier DeclSpecifierAll*
| DeclSpecifierAll* TypenameSpecifier DeclSpecifierAll*
| DeclSpecifierAll* TypeofTypeSpecifier DeclSpecifierAll*
;
DeclSpecifierSeqStructuredBinding
= DeclSpecifierSeqStructuredBindingArr
;
DeclSpecifierSeqStructuredBindingArr @array @regArray
= CvQualifierOrStorageClassSpecifier* Auto CvQualifierOrStorageClassSpecifier*
;
Auto
= "auto"
;
// Section dcl.stc
StorageClassSpecifier
= "register"
| "static"
| "thread_local"
| "__thread"
| "extern"
| "mutable"
| "__extern_inline"
;
// Section dcl.fct.spec
FunctionSpecifier
= "inline"
| "__inline"
| "__inline__"
| "virtual"
| "explicit"
;
// Section dcl.typedef
//TypedefName
// = Identifier
// ;
// Section dcl.type
TypeSpecifier
= <TrailingTypeSpecifier
| <ClassSpecifier
| <EnumSpecifier
;
TrailingTypeSpecifier
// = <SimpleTypeSpecifier
= <ElaboratedTypeSpecifier
| <TypenameSpecifier
// | <CvQualifier
;
CvQualifierOrTypeKeyword
= <CvQualifier
| <TypeKeyword
;
CvQualifierOrStorageClassSpecifier
= <CvQualifier
| <StorageClassSpecifier
;
TypeSpecifierSeq @array @regArray
= CvQualifier* TypeSpecifier CvQualifier* AttributeSpecifierSeq?
| CvQualifier* SimpleTypeSpecifierNoKeyword CvQualifier* AttributeSpecifierSeq?
| CvQualifierOrTypeKeyword+ AttributeSpecifierSeq?
;
TrailingTypeSpecifierSeq @array @regArray
= CvQualifier* TrailingTypeSpecifier CvQualifier* AttributeSpecifierSeq?
| CvQualifier* SimpleTypeSpecifierNoKeyword CvQualifier* AttributeSpecifierSeq?
| CvQualifierOrTypeKeyword+ AttributeSpecifierSeq?
;
// Section dct.type.simple
SimpleTypeSpecifier @directUnwrap
= <TypeKeyword
| <SimpleTypeSpecifierNoKeyword
;
SimpleTypeSpecifierNoKeyword @directUnwrap
= <TypeName
| nestedName:NestedNameSpecifier TypeName
| nestedName:NestedNameSpecifier "template" SimpleTemplateId
| <DecltypeSpecifier
;
TypeKeyword
= "char"
| "char16_t"
| "char32_t"
| "wchar_t"
| "bool"
| "_Bool" // C99
| "short"
| "int"
| "long"
| "signed"
| "unsigned"
| "float"
| "double"
| "void"
| "auto"
| "__builtin_va_list"
| BuiltinInt
;
token BuiltinInt
= "__builtin_" {"" | "u"} "int" {"8" | "16" | "32" | "64" | "max"} "_t"
| "__builtin_size_t"
| "__builtin_ssize_t"
| "__builtin_ptrdiff_t"
| "__builtin_intptr_t"
| "__builtin_uintptr_t"
| "__builtin_wchar_t"
| "__builtin_char8_t"
| "__builtin_char16_t"
| "__builtin_char32_t"
| "__" "int" {"8" | "16" | "32" | "64" | "128"} // Microsoft: https://docs.microsoft.com/de-de/cpp/cpp/data-type-ranges?view=msvc-160
;
TypeName @directUnwrap
= <ClassName
//| <EnumName
//| <TypedefName
//| <SimpleTemplateId // is in ClassName
;
DecltypeSpecifier
= "decltype" "(" Expression ")"
| "decltype" "(" "auto" ")" // Used in /usr/include/c++/10.2.0/bits/stl_function.h
| "__decltype" "(" Expression ")"
;
// Section dcl.type.elab
ElaboratedTypeSpecifier
= ClassKey attr:AttributeSpecifierSeq NestedNameSpecifier? name:Identifier
| ClassKey NestedNameSpecifier? "template"? attr:AttributeSpecifierSeq SimpleTemplateId
| "enum" NestedNameSpecifier? name:Identifier
;
// Section dcl.enum
//EnumName
// = Identifier
// ;
EnumSpecifier
= EnumHead "{" EnumeratorList? "}"
| EnumHead "{" EnumeratorList "," "}"
;
EnumHead
= EnumKey AttributeSpecifierSeq EnumBase?
| EnumKey AttributeSpecifierSeq name:Identifier EnumBase?
| EnumKey AttributeSpecifierSeq NestedNameSpecifier name:Identifier EnumBase?
;
OpaqueEnumDeclaration
= EnumKey AttributeSpecifierSeq Identifier EnumBase? ";"
;
EnumKey
= "enum"
| "enum" "class"
| "enum" "struct"
;
EnumBase
= ":" TypeSpecifierSeq
;
EnumeratorList @array
= Enumerator
| EnumeratorList "," Enumerator
;
Enumerator
= Identifier EnumeratorInitializer?
;
EnumeratorInitializer
= "=" ConstantExpression
;
// Section namespace.def
NamespaceName
= <OriginalNamespaceName
//| <NamespaceAlias
;
OriginalNamespaceName
= Identifier
;
NamespaceDefinition
= <NamedNamespaceDefinition
| <UnnamedNamespaceDefinition
| <NestedNamespaceDefinition
;
NamedNamespaceDefinition
= <OriginalNamespaceDefinition
// | <ExtensionNamespaceDefinition
;
OriginalNamespaceDefinition
= "inline"? "namespace" Identifier
AttributeSpecifierSeq
"{" NamespaceBody "}"
;
/*ExtensionNamespaceDefinition
= "inline"? "namespace" OriginalNamespaceName "{" NamespaceBody "}"
;*/
UnnamedNamespaceDefinition
= "inline"? "namespace" "{" NamespaceBody "}"
;
NestedNamespaceDefinition
= "namespace" EnclosingNamespaceSpecifier "::" Identifier "{" NamespaceBody "}"
;
EnclosingNamespaceSpecifier
= Identifier
| EnclosingNamespaceSpecifier "::" Identifier
;
NamespaceBody
= DeclarationSeq
;
// Section namespace.alias
/*NamespaceAlias
= Identifier
;*/
NamespaceAliasDefinition
= "namespace" Identifier "=" QualifiedNamespaceSpecifier ";"
;
QualifiedNamespaceSpecifier
= NestedNameSpecifier? NamespaceName
;
// Section namespace.udecl
UsingDeclaration
= "using" UsingDeclaratorList ";"
;
UsingDeclaratorList @array
= UsingDeclarator "..."?
| UsingDeclaratorList "," UsingDeclarator "..."?
;
UsingDeclarator
= "typename"? NestedNameSpecifier UnqualifiedId
;
// Section namespace.udir
UsingDirective
= AttributeSpecifierSeq "using" "namespace" NestedNameSpecifier? NamespaceName ";"
;
// Section dcl.asm
/*AsmDefinition
= "asm" "(" BalancedTokenSeq ")" ";"
| "__asm" "(" BalancedTokenSeq ")" ";"
| "__asm__" "(" BalancedTokenSeq ")" ";"
| "__asm__" "__volatile__" "(" BalancedTokenSeq ")" ";"
;*/
// Section dcl.link
LinkageSpecification @array
= LinkageSpecificationBegin DeclarationSeq LinkageSpecificationEnd
| LinkageSpecificationSingle
;
LinkageSpecificationSingle
= "extern" StringLiteralSequence Declaration2
;
LinkageSpecificationBegin
= "extern" StringLiteralSequence "{"
;
LinkageSpecificationEnd
= "}"
;
// Section dcl.attr.grammar
AttributeSpecifierSeqPlus @array
= AttributeSpecifier+
;
AttributeSpecifierSeq @array
= AttributeSpecifier*
;
AttributeSpecifier
= "[" "[" AttributeList "]" "]"
| <AlignmentSpecifier
| "__attribute__" "(" "(" AttributeList ")" ")"
| "__attribute" "(" "(" AttributeList ")" ")"
| "__asm__" "(" BalancedTokenSeq ")"
| "__asm__" "__volatile__" "(" BalancedTokenSeq ")"
| "__asm" "(" BalancedTokenSeq ")"
| "asm" "(" BalancedTokenSeq ")"
| "restrict"
| "__restrict"
| "__restrict__"
| "__fastcall"
| "__stdcall"
| "__thiscall"
| "__regcall"
| "__cdecl"
| "__vectorcall"
| "__ptr64"
| "__w64"
| "__ptr32"
| "__sptr"
| "__uptr"
| "__declspec" "(" Identifier ")"
;
AlignmentSpecifier
= "alignas" "(" TypeId "..."? ")"
| "alignas" "(" ConstantExpression "..."? ")"
;
AttributeList @array
= Attribute?
| AttributeList "," Attribute?
| Attribute "..."
| AttributeList "," Attribute "..."
;
Attribute
= AttributeToken AttributeArgumentClause?
;
AttributeToken
= Identifier
| "const" // used by Qt
| <AttributeScopedToken
;
AttributeScopedToken
= AttributeNamespace "::" Identifier
;
AttributeNamespace
= Identifier
;
AttributeArgumentClause
= "(" BalancedTokenSeq ")"
;
BalancedTokenSeq @array
= BalancedToken
| BalancedTokenSeq BalancedToken
;
BalancedToken
= "(" BalancedTokenSeq ")"
| "[" BalancedTokenSeq "]"
| "{" BalancedTokenSeq "}"
| Token // except a parenthesis, a bracket, or a brace
;
// Section dcl.decl
InitDeclaratorList @array
= InitDeclarator
| InitDeclaratorList "," InitDeclarator
;
InitDeclarator
= <Declarator
| @rejectTag(FunctionDeclarator) innerDeclarator:Declarator Initializer
| @needTag(NonFunctionDeclarator) @needTag(FunctionDeclarator) innerDeclarator:Declarator Initializer
;
Declarator
= <PtrDeclarator
| <FunctionDeclaratorTrailing
;
FunctionDeclaratorTrailing
= @inheritTag(NonFunctionDeclarator) innerDeclarator:NoptrDeclarator parameters:ParametersAndQualifiers TrailingReturnType virtSpec:VirtSpecifierSeq? @tag(FunctionDeclarator)
;
PtrDeclarator
= <NoptrDeclarator
| PtrOperator @inheritTag(FunctionDeclarator) @inheritTag(NonFunctionDeclarator) innerDeclarator:PtrDeclarator @tag(PtrDeclarator)
;
NoptrDeclarator
= innerDeclarator:DeclaratorId AttributeSpecifierSeq
| <FunctionDeclarator
| <ArrayDeclarator
| "(" AttributeSpecifierSeq @needTag(PtrDeclarator) innerDeclarator:PtrDeclarator ")" @tag(NonFunctionDeclarator)
| "(" AttributeSpecifierSeq @rejectTag(PtrDeclarator) innerDeclarator:PtrDeclarator ")"
;
FunctionDeclarator
= @inheritTag(NonFunctionDeclarator) innerDeclarator:NoptrDeclarator parameters:ParametersAndQualifiers virtSpec:VirtSpecifierSeq? @tag(FunctionDeclarator)
;
ArrayDeclarator
= innerDeclarator:NoptrDeclarator "[" ConstantExpression? AttributeSpecifierSeq "]" AttributeSpecifierSeq
;
ParametersAndQualifiers
= "(" ParameterDeclarationClause ")" QualifiersSeq
;
QualifiersSeq @array @regArray
= AttributeSpecifierSeq CvQualifierSeq? RefQualifier? ExceptionSpecification?
| CvQualifierSeq ExceptionSpecification AttributeSpecifierSeq // exists in Qt for QDeadlineTimer::deadline
| ExceptionSpecification AttributeSpecifierSeq
;
TrailingReturnType
= "->" TrailingTypeSpecifierSeq AbstractDeclarator?
;
PtrOperator
= "*" AttributeSpecifierSeq CvQualifierSeq?
| "&" AttributeSpecifierSeq
| "&&" AttributeSpecifierSeq
| @rejectTag(NestedNameSpecifierStart) NestedNameSpecifier "*" AttributeSpecifierSeq CvQualifierSeq?
;
CvQualifierSeq @array
= CvQualifier
| CvQualifier CvQualifierSeq
;
CvQualifier
= "const"
| "volatile"
;
RefQualifier
= "&"
| "&&"
;
DeclaratorId
= "..."? UnqualifiedId
| @rejectTag(NestedNameSpecifierStart) nestedName:NestedNameSpecifier "template" UnqualifiedId
| @rejectTag(NestedNameSpecifierStart) nestedName:NestedNameSpecifier ClassNameOrUnqualifiedId
;
ClassNameOrUnqualifiedId @directUnwrap
= <ClassName
| <UnqualifiedId
;
// Section dcl.name
TypeId
= TypeSpecifierSeq AbstractDeclarator?
;
AbstractDeclarator
= <PtrAbstractDeclarator
| <FunctionAbstractDeclaratorTrailing
;
AbstractDeclaratorOpt
= <AbstractDeclarator
| <FakeAbstractDeclarator
;
FakeAbstractDeclarator
= @empty
;
FunctionAbstractDeclaratorTrailing
= innerDeclarator:NoptrAbstractDeclarator? parameters:ParametersAndQualifiers TrailingReturnType virtSpec:VirtSpecifierSeq?
;
PtrAbstractDeclarator
= <NoptrAbstractDeclarator
| PtrOperator innerDeclarator:PtrAbstractDeclarator?
;
NoptrAbstractDeclarator
= <FunctionAbstractDeclarator
| <ArrayAbstractDeclarator
| "(" innerDeclarator:PtrAbstractDeclarator ")"
;
FunctionAbstractDeclarator
= innerDeclarator:NoptrAbstractDeclarator? parameters:ParametersAndQualifiers virtSpec:VirtSpecifierSeq?
;
ArrayAbstractDeclarator
= innerDeclarator:NoptrAbstractDeclarator? "[" ConstantExpression? AttributeSpecifierSeq "]" AttributeSpecifierSeq
;
// Section dcl.fct
ParameterDeclarationClause
= ParameterDeclarationList? //"..."?
| "..."
| ParameterDeclarationList "," "..."
;
ParameterDeclarationList @array
= ParameterDeclaration
| ParameterDeclarationList "," ParameterDeclaration
;
ParameterDeclaration
= declSeq:DeclSpecifierSeq declarators:Declarator TripleDots?