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aeeda4ee12
At the top level, if 'operator' is followed by 'infix', 'prefix', or 'postfix', consider it a contextual keyword, and parse an operator decl following it that looks like:
operator {infix|postfix|prefix} <+> {
attributes…
}
Prefix and postfix operator decls currently admit no attributes. Infix operators have 'associativity {left|right|none}' and 'precedence <int>' attributes.
This patch implements parsing for operator declarations but does not yet attach the declared attributes to func decls for the operators.
Swift SVN r4596
95 lines
3.1 KiB
C++
95 lines
3.1 KiB
C++
//===-- DeclNodes.def - Swift Declaration AST Metaprogramming -*- C++ -*-===//
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//
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// This source file is part of the Swift.org open source project
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//
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// Copyright (c) 2014 - 2015 Apple Inc. and the Swift project authors
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// Licensed under Apache License v2.0 with Runtime Library Exception
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//
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// See http://swift.org/LICENSE.txt for license information
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// See http://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
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//
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//===----------------------------------------------------------------------===//
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//
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// This file defines macros used for macro-metaprogramming with declarations.
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//
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//===----------------------------------------------------------------------===//
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/// DECL(Id, Parent)
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/// If the declaration node is not abstract, its enumerator value is
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/// DeclKind::Id. The node's class name is Id##Decl, and the name of
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/// its base class (in the Decl hierarchy) is Parent.
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/// An abstract declaration node is an abstract base class in the hierarchy;
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/// it is never a most-derived type, and it does not have an enumerator in
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/// DeclKind.
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///
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/// Most metaprograms do not care about abstract declarations, so the default
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/// is to ignore them.
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#ifndef ABSTRACT_DECL
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#define ABSTRACT_DECL(Id, Parent)
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#endif
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/// VALUE_DECL(Id, Parent)
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/// Used for subclasses of ValueDecl. The default behavior is to do
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/// the same as for Decl.
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#ifndef VALUE_DECL
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#define VALUE_DECL(Id, Parent) DECL(Id, Parent)
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#endif
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/// OPERATOR_DECL(Id, Parent)
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/// Used for subclasses of OperatorDecl. The default behavior is to do
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/// the same as for Decl.
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#ifndef OPERATOR_DECL
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#define OPERATOR_DECL(Id, Parent) DECL(Id, Parent)
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#endif
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/// NOMINAL_TYPE_DECL(Id, Parent)
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/// Used for subclasses of NominalTypeDecl. The default behavior is
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/// to do the same as for ValueDecl.
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#ifndef NOMINAL_TYPE_DECL
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#define NOMINAL_TYPE_DECL(Id, Parent) VALUE_DECL(Id, Parent)
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#endif
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/// A convenience for determining the range of declarations. These will always
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/// appear immediately after the last member.
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#ifndef DECL_RANGE
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#define DECL_RANGE(Id, First, Last)
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#endif
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DECL(Import, Decl)
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DECL(Extension, Decl)
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DECL(PatternBinding, Decl)
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DECL(TopLevelCode, Decl)
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ABSTRACT_DECL(Operator, Decl)
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OPERATOR_DECL(InfixOperator, Decl)
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OPERATOR_DECL(PrefixOperator, Decl)
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OPERATOR_DECL(PostfixOperator, Decl)
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DECL_RANGE(Operator, InfixOperator, PostfixOperator)
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ABSTRACT_DECL(Value, Decl)
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ABSTRACT_DECL(Type, Decl)
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VALUE_DECL(TypeAlias, TypeDecl)
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ABSTRACT_DECL(NominalType, TypeDecl)
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NOMINAL_TYPE_DECL(OneOf, NominalTypeDecl)
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NOMINAL_TYPE_DECL(Struct, NominalTypeDecl)
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NOMINAL_TYPE_DECL(Class, NominalTypeDecl)
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NOMINAL_TYPE_DECL(Protocol, NominalTypeDecl)
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DECL_RANGE(NominalType, OneOf, Protocol)
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DECL_RANGE(Type, TypeAlias, Protocol)
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VALUE_DECL(Var, ValueDecl)
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VALUE_DECL(Func, ValueDecl)
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VALUE_DECL(OneOfElement, ValueDecl)
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VALUE_DECL(Subscript, ValueDecl)
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VALUE_DECL(Constructor, ValueDecl)
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VALUE_DECL(Destructor, ValueDecl)
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DECL_RANGE(Value, TypeAlias, Constructor)
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#undef NOMINAL_TYPE_DECL
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#undef VALUE_DECL
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#undef DECL_RANGE
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#undef ABSTRACT_DECL
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#undef DECL
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