1185 lines
44 KiB
C++
1185 lines
44 KiB
C++
//===--- FormatToken.h - Format C++ code ------------------------*- C++ -*-===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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///
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/// \file
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/// This file contains the declaration of the FormatToken, a wrapper
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/// around Token with additional information related to formatting.
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///
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_CLANG_LIB_FORMAT_FORMATTOKEN_H
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#define LLVM_CLANG_LIB_FORMAT_FORMATTOKEN_H
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#include "clang/Basic/IdentifierTable.h"
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#include "clang/Basic/OperatorPrecedence.h"
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#include "clang/Format/Format.h"
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#include "clang/Lex/Lexer.h"
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#include <memory>
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#include <unordered_set>
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namespace clang {
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namespace format {
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#define LIST_TOKEN_TYPES \
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TYPE(ArrayInitializerLSquare) \
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TYPE(ArraySubscriptLSquare) \
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TYPE(AttributeColon) \
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TYPE(AttributeMacro) \
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TYPE(AttributeParen) \
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TYPE(AttributeSquare) \
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TYPE(BinaryOperator) \
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TYPE(BitFieldColon) \
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TYPE(BlockComment) \
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TYPE(CastRParen) \
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TYPE(ConditionalExpr) \
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TYPE(ConflictAlternative) \
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TYPE(ConflictEnd) \
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TYPE(ConflictStart) \
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TYPE(ConstraintJunctions) \
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TYPE(CtorInitializerColon) \
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TYPE(CtorInitializerComma) \
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TYPE(DesignatedInitializerLSquare) \
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TYPE(DesignatedInitializerPeriod) \
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TYPE(DictLiteral) \
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TYPE(ForEachMacro) \
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TYPE(FunctionAnnotationRParen) \
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TYPE(FunctionDeclarationName) \
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TYPE(FunctionLBrace) \
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TYPE(FunctionTypeLParen) \
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TYPE(ImplicitStringLiteral) \
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TYPE(InheritanceColon) \
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TYPE(InheritanceComma) \
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TYPE(InlineASMBrace) \
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TYPE(InlineASMColon) \
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TYPE(InlineASMSymbolicNameLSquare) \
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TYPE(JavaAnnotation) \
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TYPE(JsComputedPropertyName) \
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TYPE(JsExponentiation) \
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TYPE(JsExponentiationEqual) \
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TYPE(JsFatArrow) \
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TYPE(JsNonNullAssertion) \
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TYPE(JsNullishCoalescingOperator) \
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TYPE(JsNullPropagatingOperator) \
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TYPE(JsPrivateIdentifier) \
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TYPE(JsTypeColon) \
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TYPE(JsTypeOperator) \
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TYPE(JsTypeOptionalQuestion) \
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TYPE(JsAndAndEqual) \
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TYPE(JsPipePipeEqual) \
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TYPE(JsNullishCoalescingEqual) \
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TYPE(LambdaArrow) \
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TYPE(LambdaLBrace) \
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TYPE(LambdaLSquare) \
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TYPE(LeadingJavaAnnotation) \
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TYPE(LineComment) \
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TYPE(MacroBlockBegin) \
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TYPE(MacroBlockEnd) \
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TYPE(NamespaceMacro) \
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TYPE(ObjCBlockLBrace) \
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TYPE(ObjCBlockLParen) \
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TYPE(ObjCDecl) \
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TYPE(ObjCForIn) \
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TYPE(ObjCMethodExpr) \
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TYPE(ObjCMethodSpecifier) \
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TYPE(ObjCProperty) \
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TYPE(ObjCStringLiteral) \
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TYPE(OverloadedOperator) \
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TYPE(OverloadedOperatorLParen) \
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TYPE(PointerOrReference) \
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TYPE(PureVirtualSpecifier) \
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TYPE(RangeBasedForLoopColon) \
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TYPE(RegexLiteral) \
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TYPE(SelectorName) \
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TYPE(StartOfName) \
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TYPE(StatementAttributeLikeMacro) \
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TYPE(StatementMacro) \
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TYPE(StructuredBindingLSquare) \
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TYPE(TemplateCloser) \
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TYPE(TemplateOpener) \
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TYPE(TemplateString) \
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TYPE(ProtoExtensionLSquare) \
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TYPE(TrailingAnnotation) \
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TYPE(TrailingReturnArrow) \
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TYPE(TrailingUnaryOperator) \
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TYPE(TypeDeclarationParen) \
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TYPE(TypenameMacro) \
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TYPE(UnaryOperator) \
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TYPE(UntouchableMacroFunc) \
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TYPE(CSharpStringLiteral) \
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TYPE(CSharpNamedArgumentColon) \
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TYPE(CSharpNullable) \
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TYPE(CSharpNullCoalescing) \
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TYPE(CSharpNullConditional) \
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TYPE(CSharpNullConditionalLSquare) \
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TYPE(CSharpGenericTypeConstraint) \
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TYPE(CSharpGenericTypeConstraintColon) \
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TYPE(CSharpGenericTypeConstraintComma) \
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TYPE(Unknown)
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/// Determines the semantic type of a syntactic token, e.g. whether "<" is a
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/// template opener or binary operator.
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enum TokenType : uint8_t {
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#define TYPE(X) TT_##X,
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LIST_TOKEN_TYPES
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#undef TYPE
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NUM_TOKEN_TYPES
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};
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/// Determines the name of a token type.
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const char *getTokenTypeName(TokenType Type);
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// Represents what type of block a set of braces open.
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enum BraceBlockKind { BK_Unknown, BK_Block, BK_BracedInit };
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// The packing kind of a function's parameters.
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enum ParameterPackingKind { PPK_BinPacked, PPK_OnePerLine, PPK_Inconclusive };
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enum FormatDecision { FD_Unformatted, FD_Continue, FD_Break };
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/// Roles a token can take in a configured macro expansion.
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enum MacroRole {
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/// The token was expanded from a macro argument when formatting the expanded
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/// token sequence.
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MR_ExpandedArg,
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/// The token is part of a macro argument that was previously formatted as
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/// expansion when formatting the unexpanded macro call.
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MR_UnexpandedArg,
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/// The token was expanded from a macro definition, and is not visible as part
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/// of the macro call.
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MR_Hidden,
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};
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struct FormatToken;
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/// Contains information on the token's role in a macro expansion.
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///
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/// Given the following definitions:
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/// A(X) = [ X ]
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/// B(X) = < X >
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/// C(X) = X
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///
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/// Consider the macro call:
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/// A({B(C(C(x)))}) -> [{<x>}]
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///
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/// In this case, the tokens of the unexpanded macro call will have the
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/// following relevant entries in their macro context (note that formatting
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/// the unexpanded macro call happens *after* formatting the expanded macro
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/// call):
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/// A( { B( C( C(x) ) ) } )
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/// Role: NN U NN NN NNUN N N U N (N=None, U=UnexpandedArg)
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///
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/// [ { < x > } ]
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/// Role: H E H E H E H (H=Hidden, E=ExpandedArg)
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/// ExpandedFrom[0]: A A A A A A A
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/// ExpandedFrom[1]: B B B
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/// ExpandedFrom[2]: C
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/// ExpandedFrom[3]: C
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/// StartOfExpansion: 1 0 1 2 0 0 0
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/// EndOfExpansion: 0 0 0 2 1 0 1
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struct MacroExpansion {
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MacroExpansion(MacroRole Role) : Role(Role) {}
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/// The token's role in the macro expansion.
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/// When formatting an expanded macro, all tokens that are part of macro
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/// arguments will be MR_ExpandedArg, while all tokens that are not visible in
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/// the macro call will be MR_Hidden.
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/// When formatting an unexpanded macro call, all tokens that are part of
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/// macro arguments will be MR_UnexpandedArg.
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MacroRole Role;
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/// The stack of macro call identifier tokens this token was expanded from.
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llvm::SmallVector<FormatToken *, 1> ExpandedFrom;
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/// The number of expansions of which this macro is the first entry.
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unsigned StartOfExpansion = 0;
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/// The number of currently open expansions in \c ExpandedFrom this macro is
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/// the last token in.
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unsigned EndOfExpansion = 0;
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};
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class TokenRole;
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class AnnotatedLine;
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/// A wrapper around a \c Token storing information about the
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/// whitespace characters preceding it.
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struct FormatToken {
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FormatToken()
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: HasUnescapedNewline(false), IsMultiline(false), IsFirst(false),
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MustBreakBefore(false), IsUnterminatedLiteral(false),
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CanBreakBefore(false), ClosesTemplateDeclaration(false),
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StartsBinaryExpression(false), EndsBinaryExpression(false),
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PartOfMultiVariableDeclStmt(false), ContinuesLineCommentSection(false),
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Finalized(false), BlockKind(BK_Unknown), Decision(FD_Unformatted),
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PackingKind(PPK_Inconclusive), Type(TT_Unknown) {}
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/// The \c Token.
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Token Tok;
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/// The raw text of the token.
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///
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/// Contains the raw token text without leading whitespace and without leading
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/// escaped newlines.
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StringRef TokenText;
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/// A token can have a special role that can carry extra information
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/// about the token's formatting.
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/// FIXME: Make FormatToken for parsing and AnnotatedToken two different
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/// classes and make this a unique_ptr in the AnnotatedToken class.
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std::shared_ptr<TokenRole> Role;
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/// The range of the whitespace immediately preceding the \c Token.
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SourceRange WhitespaceRange;
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/// Whether there is at least one unescaped newline before the \c
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/// Token.
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unsigned HasUnescapedNewline : 1;
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/// Whether the token text contains newlines (escaped or not).
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unsigned IsMultiline : 1;
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/// Indicates that this is the first token of the file.
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unsigned IsFirst : 1;
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/// Whether there must be a line break before this token.
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///
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/// This happens for example when a preprocessor directive ended directly
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/// before the token.
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unsigned MustBreakBefore : 1;
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/// Set to \c true if this token is an unterminated literal.
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unsigned IsUnterminatedLiteral : 1;
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/// \c true if it is allowed to break before this token.
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unsigned CanBreakBefore : 1;
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/// \c true if this is the ">" of "template<..>".
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unsigned ClosesTemplateDeclaration : 1;
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/// \c true if this token starts a binary expression, i.e. has at least
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/// one fake l_paren with a precedence greater than prec::Unknown.
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unsigned StartsBinaryExpression : 1;
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/// \c true if this token ends a binary expression.
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unsigned EndsBinaryExpression : 1;
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/// Is this token part of a \c DeclStmt defining multiple variables?
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///
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/// Only set if \c Type == \c TT_StartOfName.
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unsigned PartOfMultiVariableDeclStmt : 1;
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/// Does this line comment continue a line comment section?
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///
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/// Only set to true if \c Type == \c TT_LineComment.
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unsigned ContinuesLineCommentSection : 1;
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/// If \c true, this token has been fully formatted (indented and
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/// potentially re-formatted inside), and we do not allow further formatting
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/// changes.
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unsigned Finalized : 1;
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private:
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/// Contains the kind of block if this token is a brace.
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unsigned BlockKind : 2;
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public:
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BraceBlockKind getBlockKind() const {
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return static_cast<BraceBlockKind>(BlockKind);
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}
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void setBlockKind(BraceBlockKind BBK) {
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BlockKind = BBK;
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assert(getBlockKind() == BBK && "BraceBlockKind overflow!");
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}
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private:
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/// Stores the formatting decision for the token once it was made.
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unsigned Decision : 2;
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public:
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FormatDecision getDecision() const {
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return static_cast<FormatDecision>(Decision);
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}
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void setDecision(FormatDecision D) {
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Decision = D;
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assert(getDecision() == D && "FormatDecision overflow!");
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}
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private:
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/// If this is an opening parenthesis, how are the parameters packed?
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unsigned PackingKind : 2;
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public:
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ParameterPackingKind getPackingKind() const {
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return static_cast<ParameterPackingKind>(PackingKind);
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}
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void setPackingKind(ParameterPackingKind K) {
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PackingKind = K;
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assert(getPackingKind() == K && "ParameterPackingKind overflow!");
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}
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private:
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TokenType Type;
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public:
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/// Returns the token's type, e.g. whether "<" is a template opener or
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/// binary operator.
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TokenType getType() const { return Type; }
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void setType(TokenType T) { Type = T; }
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/// The number of newlines immediately before the \c Token.
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///
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/// This can be used to determine what the user wrote in the original code
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/// and thereby e.g. leave an empty line between two function definitions.
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unsigned NewlinesBefore = 0;
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/// The offset just past the last '\n' in this token's leading
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/// whitespace (relative to \c WhiteSpaceStart). 0 if there is no '\n'.
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unsigned LastNewlineOffset = 0;
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/// The width of the non-whitespace parts of the token (or its first
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/// line for multi-line tokens) in columns.
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/// We need this to correctly measure number of columns a token spans.
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unsigned ColumnWidth = 0;
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/// Contains the width in columns of the last line of a multi-line
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/// token.
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unsigned LastLineColumnWidth = 0;
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/// The number of spaces that should be inserted before this token.
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unsigned SpacesRequiredBefore = 0;
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/// Number of parameters, if this is "(", "[" or "<".
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unsigned ParameterCount = 0;
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/// Number of parameters that are nested blocks,
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/// if this is "(", "[" or "<".
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unsigned BlockParameterCount = 0;
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/// If this is a bracket ("<", "(", "[" or "{"), contains the kind of
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/// the surrounding bracket.
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tok::TokenKind ParentBracket = tok::unknown;
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/// The total length of the unwrapped line up to and including this
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/// token.
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unsigned TotalLength = 0;
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/// The original 0-based column of this token, including expanded tabs.
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/// The configured TabWidth is used as tab width.
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unsigned OriginalColumn = 0;
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/// The length of following tokens until the next natural split point,
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/// or the next token that can be broken.
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unsigned UnbreakableTailLength = 0;
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// FIXME: Come up with a 'cleaner' concept.
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/// The binding strength of a token. This is a combined value of
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/// operator precedence, parenthesis nesting, etc.
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unsigned BindingStrength = 0;
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/// The nesting level of this token, i.e. the number of surrounding (),
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/// [], {} or <>.
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unsigned NestingLevel = 0;
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/// The indent level of this token. Copied from the surrounding line.
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unsigned IndentLevel = 0;
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/// Penalty for inserting a line break before this token.
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unsigned SplitPenalty = 0;
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/// If this is the first ObjC selector name in an ObjC method
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/// definition or call, this contains the length of the longest name.
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///
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/// This being set to 0 means that the selectors should not be colon-aligned,
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/// e.g. because several of them are block-type.
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unsigned LongestObjCSelectorName = 0;
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/// If this is the first ObjC selector name in an ObjC method
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/// definition or call, this contains the number of parts that the whole
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/// selector consist of.
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unsigned ObjCSelectorNameParts = 0;
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/// The 0-based index of the parameter/argument. For ObjC it is set
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/// for the selector name token.
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/// For now calculated only for ObjC.
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unsigned ParameterIndex = 0;
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/// Stores the number of required fake parentheses and the
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/// corresponding operator precedence.
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///
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/// If multiple fake parentheses start at a token, this vector stores them in
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/// reverse order, i.e. inner fake parenthesis first.
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SmallVector<prec::Level, 4> FakeLParens;
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/// Insert this many fake ) after this token for correct indentation.
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unsigned FakeRParens = 0;
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/// If this is an operator (or "."/"->") in a sequence of operators
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/// with the same precedence, contains the 0-based operator index.
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unsigned OperatorIndex = 0;
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/// If this is an operator (or "."/"->") in a sequence of operators
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/// with the same precedence, points to the next operator.
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FormatToken *NextOperator = nullptr;
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/// If this is a bracket, this points to the matching one.
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FormatToken *MatchingParen = nullptr;
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/// The previous token in the unwrapped line.
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FormatToken *Previous = nullptr;
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/// The next token in the unwrapped line.
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FormatToken *Next = nullptr;
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/// If this token starts a block, this contains all the unwrapped lines
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/// in it.
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SmallVector<AnnotatedLine *, 1> Children;
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// Contains all attributes related to how this token takes part
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// in a configured macro expansion.
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llvm::Optional<MacroExpansion> MacroCtx;
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bool is(tok::TokenKind Kind) const { return Tok.is(Kind); }
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bool is(TokenType TT) const { return getType() == TT; }
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bool is(const IdentifierInfo *II) const {
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return II && II == Tok.getIdentifierInfo();
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}
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bool is(tok::PPKeywordKind Kind) const {
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return Tok.getIdentifierInfo() &&
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Tok.getIdentifierInfo()->getPPKeywordID() == Kind;
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}
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bool is(BraceBlockKind BBK) const { return getBlockKind() == BBK; }
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bool is(ParameterPackingKind PPK) const { return getPackingKind() == PPK; }
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template <typename A, typename B> bool isOneOf(A K1, B K2) const {
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return is(K1) || is(K2);
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}
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template <typename A, typename B, typename... Ts>
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bool isOneOf(A K1, B K2, Ts... Ks) const {
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return is(K1) || isOneOf(K2, Ks...);
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}
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template <typename T> bool isNot(T Kind) const { return !is(Kind); }
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bool isIf(bool AllowConstexprMacro = true) const {
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return is(tok::kw_if) || endsSequence(tok::kw_constexpr, tok::kw_if) ||
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(endsSequence(tok::identifier, tok::kw_if) && AllowConstexprMacro);
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}
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bool closesScopeAfterBlock() const {
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if (getBlockKind() == BK_Block)
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return true;
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if (closesScope())
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return Previous->closesScopeAfterBlock();
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return false;
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}
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/// \c true if this token starts a sequence with the given tokens in order,
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/// following the ``Next`` pointers, ignoring comments.
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template <typename A, typename... Ts>
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bool startsSequence(A K1, Ts... Tokens) const {
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return startsSequenceInternal(K1, Tokens...);
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}
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/// \c true if this token ends a sequence with the given tokens in order,
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/// following the ``Previous`` pointers, ignoring comments.
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/// For example, given tokens [T1, T2, T3], the function returns true if
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/// 3 tokens ending at this (ignoring comments) are [T3, T2, T1]. In other
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/// words, the tokens passed to this function need to the reverse of the
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/// order the tokens appear in code.
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template <typename A, typename... Ts>
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bool endsSequence(A K1, Ts... Tokens) const {
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return endsSequenceInternal(K1, Tokens...);
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}
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bool isStringLiteral() const { return tok::isStringLiteral(Tok.getKind()); }
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bool isObjCAtKeyword(tok::ObjCKeywordKind Kind) const {
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return Tok.isObjCAtKeyword(Kind);
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}
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bool isAccessSpecifier(bool ColonRequired = true) const {
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return isOneOf(tok::kw_public, tok::kw_protected, tok::kw_private) &&
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(!ColonRequired || (Next && Next->is(tok::colon)));
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}
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|
bool canBePointerOrReferenceQualifier() const {
|
|
return isOneOf(tok::kw_const, tok::kw_restrict, tok::kw_volatile,
|
|
tok::kw___attribute, tok::kw__Nonnull, tok::kw__Nullable,
|
|
tok::kw__Null_unspecified, tok::kw___ptr32, tok::kw___ptr64,
|
|
TT_AttributeMacro);
|
|
}
|
|
|
|
/// Determine whether the token is a simple-type-specifier.
|
|
bool isSimpleTypeSpecifier() const;
|
|
|
|
bool isObjCAccessSpecifier() const {
|
|
return is(tok::at) && Next &&
|
|
(Next->isObjCAtKeyword(tok::objc_public) ||
|
|
Next->isObjCAtKeyword(tok::objc_protected) ||
|
|
Next->isObjCAtKeyword(tok::objc_package) ||
|
|
Next->isObjCAtKeyword(tok::objc_private));
|
|
}
|
|
|
|
/// Returns whether \p Tok is ([{ or an opening < of a template or in
|
|
/// protos.
|
|
bool opensScope() const {
|
|
if (is(TT_TemplateString) && TokenText.endswith("${"))
|
|
return true;
|
|
if (is(TT_DictLiteral) && is(tok::less))
|
|
return true;
|
|
return isOneOf(tok::l_paren, tok::l_brace, tok::l_square,
|
|
TT_TemplateOpener);
|
|
}
|
|
/// Returns whether \p Tok is )]} or a closing > of a template or in
|
|
/// protos.
|
|
bool closesScope() const {
|
|
if (is(TT_TemplateString) && TokenText.startswith("}"))
|
|
return true;
|
|
if (is(TT_DictLiteral) && is(tok::greater))
|
|
return true;
|
|
return isOneOf(tok::r_paren, tok::r_brace, tok::r_square,
|
|
TT_TemplateCloser);
|
|
}
|
|
|
|
/// Returns \c true if this is a "." or "->" accessing a member.
|
|
bool isMemberAccess() const {
|
|
return isOneOf(tok::arrow, tok::period, tok::arrowstar) &&
|
|
!isOneOf(TT_DesignatedInitializerPeriod, TT_TrailingReturnArrow,
|
|
TT_LambdaArrow, TT_LeadingJavaAnnotation);
|
|
}
|
|
|
|
bool isUnaryOperator() const {
|
|
switch (Tok.getKind()) {
|
|
case tok::plus:
|
|
case tok::plusplus:
|
|
case tok::minus:
|
|
case tok::minusminus:
|
|
case tok::exclaim:
|
|
case tok::tilde:
|
|
case tok::kw_sizeof:
|
|
case tok::kw_alignof:
|
|
return true;
|
|
default:
|
|
return false;
|
|
}
|
|
}
|
|
|
|
bool isBinaryOperator() const {
|
|
// Comma is a binary operator, but does not behave as such wrt. formatting.
|
|
return getPrecedence() > prec::Comma;
|
|
}
|
|
|
|
bool isTrailingComment() const {
|
|
return is(tok::comment) &&
|
|
(is(TT_LineComment) || !Next || Next->NewlinesBefore > 0);
|
|
}
|
|
|
|
/// Returns \c true if this is a keyword that can be used
|
|
/// like a function call (e.g. sizeof, typeid, ...).
|
|
bool isFunctionLikeKeyword() const {
|
|
switch (Tok.getKind()) {
|
|
case tok::kw_throw:
|
|
case tok::kw_typeid:
|
|
case tok::kw_return:
|
|
case tok::kw_sizeof:
|
|
case tok::kw_alignof:
|
|
case tok::kw_alignas:
|
|
case tok::kw_decltype:
|
|
case tok::kw_noexcept:
|
|
case tok::kw_static_assert:
|
|
case tok::kw__Atomic:
|
|
case tok::kw___attribute:
|
|
case tok::kw___underlying_type:
|
|
case tok::kw_requires:
|
|
return true;
|
|
default:
|
|
return false;
|
|
}
|
|
}
|
|
|
|
/// Returns \c true if this is a string literal that's like a label,
|
|
/// e.g. ends with "=" or ":".
|
|
bool isLabelString() const {
|
|
if (!is(tok::string_literal))
|
|
return false;
|
|
StringRef Content = TokenText;
|
|
if (Content.startswith("\"") || Content.startswith("'"))
|
|
Content = Content.drop_front(1);
|
|
if (Content.endswith("\"") || Content.endswith("'"))
|
|
Content = Content.drop_back(1);
|
|
Content = Content.trim();
|
|
return Content.size() > 1 &&
|
|
(Content.back() == ':' || Content.back() == '=');
|
|
}
|
|
|
|
/// Returns actual token start location without leading escaped
|
|
/// newlines and whitespace.
|
|
///
|
|
/// This can be different to Tok.getLocation(), which includes leading escaped
|
|
/// newlines.
|
|
SourceLocation getStartOfNonWhitespace() const {
|
|
return WhitespaceRange.getEnd();
|
|
}
|
|
|
|
prec::Level getPrecedence() const {
|
|
return getBinOpPrecedence(Tok.getKind(), /*GreaterThanIsOperator=*/true,
|
|
/*CPlusPlus11=*/true);
|
|
}
|
|
|
|
/// Returns the previous token ignoring comments.
|
|
FormatToken *getPreviousNonComment() const {
|
|
FormatToken *Tok = Previous;
|
|
while (Tok && Tok->is(tok::comment))
|
|
Tok = Tok->Previous;
|
|
return Tok;
|
|
}
|
|
|
|
/// Returns the next token ignoring comments.
|
|
const FormatToken *getNextNonComment() const {
|
|
const FormatToken *Tok = Next;
|
|
while (Tok && Tok->is(tok::comment))
|
|
Tok = Tok->Next;
|
|
return Tok;
|
|
}
|
|
|
|
/// Returns \c true if this tokens starts a block-type list, i.e. a
|
|
/// list that should be indented with a block indent.
|
|
bool opensBlockOrBlockTypeList(const FormatStyle &Style) const {
|
|
// C# Does not indent object initialisers as continuations.
|
|
if (is(tok::l_brace) && getBlockKind() == BK_BracedInit && Style.isCSharp())
|
|
return true;
|
|
if (is(TT_TemplateString) && opensScope())
|
|
return true;
|
|
return is(TT_ArrayInitializerLSquare) || is(TT_ProtoExtensionLSquare) ||
|
|
(is(tok::l_brace) &&
|
|
(getBlockKind() == BK_Block || is(TT_DictLiteral) ||
|
|
(!Style.Cpp11BracedListStyle && NestingLevel == 0))) ||
|
|
(is(tok::less) && (Style.Language == FormatStyle::LK_Proto ||
|
|
Style.Language == FormatStyle::LK_TextProto));
|
|
}
|
|
|
|
/// Returns whether the token is the left square bracket of a C++
|
|
/// structured binding declaration.
|
|
bool isCppStructuredBinding(const FormatStyle &Style) const {
|
|
if (!Style.isCpp() || isNot(tok::l_square))
|
|
return false;
|
|
const FormatToken *T = this;
|
|
do {
|
|
T = T->getPreviousNonComment();
|
|
} while (T && T->isOneOf(tok::kw_const, tok::kw_volatile, tok::amp,
|
|
tok::ampamp));
|
|
return T && T->is(tok::kw_auto);
|
|
}
|
|
|
|
/// Same as opensBlockOrBlockTypeList, but for the closing token.
|
|
bool closesBlockOrBlockTypeList(const FormatStyle &Style) const {
|
|
if (is(TT_TemplateString) && closesScope())
|
|
return true;
|
|
return MatchingParen && MatchingParen->opensBlockOrBlockTypeList(Style);
|
|
}
|
|
|
|
/// Return the actual namespace token, if this token starts a namespace
|
|
/// block.
|
|
const FormatToken *getNamespaceToken() const {
|
|
const FormatToken *NamespaceTok = this;
|
|
if (is(tok::comment))
|
|
NamespaceTok = NamespaceTok->getNextNonComment();
|
|
// Detect "(inline|export)? namespace" in the beginning of a line.
|
|
if (NamespaceTok && NamespaceTok->isOneOf(tok::kw_inline, tok::kw_export))
|
|
NamespaceTok = NamespaceTok->getNextNonComment();
|
|
return NamespaceTok &&
|
|
NamespaceTok->isOneOf(tok::kw_namespace, TT_NamespaceMacro)
|
|
? NamespaceTok
|
|
: nullptr;
|
|
}
|
|
|
|
void copyFrom(const FormatToken &Tok) { *this = Tok; }
|
|
|
|
private:
|
|
// Only allow copying via the explicit copyFrom method.
|
|
FormatToken(const FormatToken &) = delete;
|
|
FormatToken &operator=(const FormatToken &) = default;
|
|
|
|
template <typename A, typename... Ts>
|
|
bool startsSequenceInternal(A K1, Ts... Tokens) const {
|
|
if (is(tok::comment) && Next)
|
|
return Next->startsSequenceInternal(K1, Tokens...);
|
|
return is(K1) && Next && Next->startsSequenceInternal(Tokens...);
|
|
}
|
|
|
|
template <typename A> bool startsSequenceInternal(A K1) const {
|
|
if (is(tok::comment) && Next)
|
|
return Next->startsSequenceInternal(K1);
|
|
return is(K1);
|
|
}
|
|
|
|
template <typename A, typename... Ts> bool endsSequenceInternal(A K1) const {
|
|
if (is(tok::comment) && Previous)
|
|
return Previous->endsSequenceInternal(K1);
|
|
return is(K1);
|
|
}
|
|
|
|
template <typename A, typename... Ts>
|
|
bool endsSequenceInternal(A K1, Ts... Tokens) const {
|
|
if (is(tok::comment) && Previous)
|
|
return Previous->endsSequenceInternal(K1, Tokens...);
|
|
return is(K1) && Previous && Previous->endsSequenceInternal(Tokens...);
|
|
}
|
|
};
|
|
|
|
class ContinuationIndenter;
|
|
struct LineState;
|
|
|
|
class TokenRole {
|
|
public:
|
|
TokenRole(const FormatStyle &Style) : Style(Style) {}
|
|
virtual ~TokenRole();
|
|
|
|
/// After the \c TokenAnnotator has finished annotating all the tokens,
|
|
/// this function precomputes required information for formatting.
|
|
virtual void precomputeFormattingInfos(const FormatToken *Token);
|
|
|
|
/// Apply the special formatting that the given role demands.
|
|
///
|
|
/// Assumes that the token having this role is already formatted.
|
|
///
|
|
/// Continues formatting from \p State leaving indentation to \p Indenter and
|
|
/// returns the total penalty that this formatting incurs.
|
|
virtual unsigned formatFromToken(LineState &State,
|
|
ContinuationIndenter *Indenter,
|
|
bool DryRun) {
|
|
return 0;
|
|
}
|
|
|
|
/// Same as \c formatFromToken, but assumes that the first token has
|
|
/// already been set thereby deciding on the first line break.
|
|
virtual unsigned formatAfterToken(LineState &State,
|
|
ContinuationIndenter *Indenter,
|
|
bool DryRun) {
|
|
return 0;
|
|
}
|
|
|
|
/// Notifies the \c Role that a comma was found.
|
|
virtual void CommaFound(const FormatToken *Token) {}
|
|
|
|
virtual const FormatToken *lastComma() { return nullptr; }
|
|
|
|
protected:
|
|
const FormatStyle &Style;
|
|
};
|
|
|
|
class CommaSeparatedList : public TokenRole {
|
|
public:
|
|
CommaSeparatedList(const FormatStyle &Style)
|
|
: TokenRole(Style), HasNestedBracedList(false) {}
|
|
|
|
void precomputeFormattingInfos(const FormatToken *Token) override;
|
|
|
|
unsigned formatAfterToken(LineState &State, ContinuationIndenter *Indenter,
|
|
bool DryRun) override;
|
|
|
|
unsigned formatFromToken(LineState &State, ContinuationIndenter *Indenter,
|
|
bool DryRun) override;
|
|
|
|
/// Adds \p Token as the next comma to the \c CommaSeparated list.
|
|
void CommaFound(const FormatToken *Token) override {
|
|
Commas.push_back(Token);
|
|
}
|
|
|
|
const FormatToken *lastComma() override {
|
|
if (Commas.empty())
|
|
return nullptr;
|
|
return Commas.back();
|
|
}
|
|
|
|
private:
|
|
/// A struct that holds information on how to format a given list with
|
|
/// a specific number of columns.
|
|
struct ColumnFormat {
|
|
/// The number of columns to use.
|
|
unsigned Columns;
|
|
|
|
/// The total width in characters.
|
|
unsigned TotalWidth;
|
|
|
|
/// The number of lines required for this format.
|
|
unsigned LineCount;
|
|
|
|
/// The size of each column in characters.
|
|
SmallVector<unsigned, 8> ColumnSizes;
|
|
};
|
|
|
|
/// Calculate which \c ColumnFormat fits best into
|
|
/// \p RemainingCharacters.
|
|
const ColumnFormat *getColumnFormat(unsigned RemainingCharacters) const;
|
|
|
|
/// The ordered \c FormatTokens making up the commas of this list.
|
|
SmallVector<const FormatToken *, 8> Commas;
|
|
|
|
/// The length of each of the list's items in characters including the
|
|
/// trailing comma.
|
|
SmallVector<unsigned, 8> ItemLengths;
|
|
|
|
/// Precomputed formats that can be used for this list.
|
|
SmallVector<ColumnFormat, 4> Formats;
|
|
|
|
bool HasNestedBracedList;
|
|
};
|
|
|
|
/// Encapsulates keywords that are context sensitive or for languages not
|
|
/// properly supported by Clang's lexer.
|
|
struct AdditionalKeywords {
|
|
AdditionalKeywords(IdentifierTable &IdentTable) {
|
|
kw_final = &IdentTable.get("final");
|
|
kw_override = &IdentTable.get("override");
|
|
kw_in = &IdentTable.get("in");
|
|
kw_of = &IdentTable.get("of");
|
|
kw_CF_CLOSED_ENUM = &IdentTable.get("CF_CLOSED_ENUM");
|
|
kw_CF_ENUM = &IdentTable.get("CF_ENUM");
|
|
kw_CF_OPTIONS = &IdentTable.get("CF_OPTIONS");
|
|
kw_NS_CLOSED_ENUM = &IdentTable.get("NS_CLOSED_ENUM");
|
|
kw_NS_ENUM = &IdentTable.get("NS_ENUM");
|
|
kw_NS_OPTIONS = &IdentTable.get("NS_OPTIONS");
|
|
|
|
kw_as = &IdentTable.get("as");
|
|
kw_async = &IdentTable.get("async");
|
|
kw_await = &IdentTable.get("await");
|
|
kw_declare = &IdentTable.get("declare");
|
|
kw_finally = &IdentTable.get("finally");
|
|
kw_from = &IdentTable.get("from");
|
|
kw_function = &IdentTable.get("function");
|
|
kw_get = &IdentTable.get("get");
|
|
kw_import = &IdentTable.get("import");
|
|
kw_infer = &IdentTable.get("infer");
|
|
kw_is = &IdentTable.get("is");
|
|
kw_let = &IdentTable.get("let");
|
|
kw_module = &IdentTable.get("module");
|
|
kw_readonly = &IdentTable.get("readonly");
|
|
kw_set = &IdentTable.get("set");
|
|
kw_type = &IdentTable.get("type");
|
|
kw_typeof = &IdentTable.get("typeof");
|
|
kw_var = &IdentTable.get("var");
|
|
kw_yield = &IdentTable.get("yield");
|
|
|
|
kw_abstract = &IdentTable.get("abstract");
|
|
kw_assert = &IdentTable.get("assert");
|
|
kw_extends = &IdentTable.get("extends");
|
|
kw_implements = &IdentTable.get("implements");
|
|
kw_instanceof = &IdentTable.get("instanceof");
|
|
kw_interface = &IdentTable.get("interface");
|
|
kw_native = &IdentTable.get("native");
|
|
kw_package = &IdentTable.get("package");
|
|
kw_synchronized = &IdentTable.get("synchronized");
|
|
kw_throws = &IdentTable.get("throws");
|
|
kw___except = &IdentTable.get("__except");
|
|
kw___has_include = &IdentTable.get("__has_include");
|
|
kw___has_include_next = &IdentTable.get("__has_include_next");
|
|
|
|
kw_mark = &IdentTable.get("mark");
|
|
|
|
kw_extend = &IdentTable.get("extend");
|
|
kw_option = &IdentTable.get("option");
|
|
kw_optional = &IdentTable.get("optional");
|
|
kw_repeated = &IdentTable.get("repeated");
|
|
kw_required = &IdentTable.get("required");
|
|
kw_returns = &IdentTable.get("returns");
|
|
|
|
kw_signals = &IdentTable.get("signals");
|
|
kw_qsignals = &IdentTable.get("Q_SIGNALS");
|
|
kw_slots = &IdentTable.get("slots");
|
|
kw_qslots = &IdentTable.get("Q_SLOTS");
|
|
|
|
// C# keywords
|
|
kw_dollar = &IdentTable.get("dollar");
|
|
kw_base = &IdentTable.get("base");
|
|
kw_byte = &IdentTable.get("byte");
|
|
kw_checked = &IdentTable.get("checked");
|
|
kw_decimal = &IdentTable.get("decimal");
|
|
kw_delegate = &IdentTable.get("delegate");
|
|
kw_event = &IdentTable.get("event");
|
|
kw_fixed = &IdentTable.get("fixed");
|
|
kw_foreach = &IdentTable.get("foreach");
|
|
kw_implicit = &IdentTable.get("implicit");
|
|
kw_internal = &IdentTable.get("internal");
|
|
kw_lock = &IdentTable.get("lock");
|
|
kw_null = &IdentTable.get("null");
|
|
kw_object = &IdentTable.get("object");
|
|
kw_out = &IdentTable.get("out");
|
|
kw_params = &IdentTable.get("params");
|
|
kw_ref = &IdentTable.get("ref");
|
|
kw_string = &IdentTable.get("string");
|
|
kw_stackalloc = &IdentTable.get("stackalloc");
|
|
kw_sbyte = &IdentTable.get("sbyte");
|
|
kw_sealed = &IdentTable.get("sealed");
|
|
kw_uint = &IdentTable.get("uint");
|
|
kw_ulong = &IdentTable.get("ulong");
|
|
kw_unchecked = &IdentTable.get("unchecked");
|
|
kw_unsafe = &IdentTable.get("unsafe");
|
|
kw_ushort = &IdentTable.get("ushort");
|
|
kw_when = &IdentTable.get("when");
|
|
kw_where = &IdentTable.get("where");
|
|
|
|
// Keep this at the end of the constructor to make sure everything here
|
|
// is
|
|
// already initialized.
|
|
JsExtraKeywords = std::unordered_set<IdentifierInfo *>(
|
|
{kw_as, kw_async, kw_await, kw_declare, kw_finally, kw_from,
|
|
kw_function, kw_get, kw_import, kw_is, kw_let, kw_module, kw_readonly,
|
|
kw_set, kw_type, kw_typeof, kw_var, kw_yield,
|
|
// Keywords from the Java section.
|
|
kw_abstract, kw_extends, kw_implements, kw_instanceof, kw_interface});
|
|
|
|
CSharpExtraKeywords = std::unordered_set<IdentifierInfo *>(
|
|
{kw_base, kw_byte, kw_checked, kw_decimal, kw_delegate, kw_event,
|
|
kw_fixed, kw_foreach, kw_implicit, kw_in, kw_interface, kw_internal,
|
|
kw_is, kw_lock, kw_null, kw_object, kw_out, kw_override, kw_params,
|
|
kw_readonly, kw_ref, kw_string, kw_stackalloc, kw_sbyte, kw_sealed,
|
|
kw_uint, kw_ulong, kw_unchecked, kw_unsafe, kw_ushort, kw_when,
|
|
kw_where,
|
|
// Keywords from the JavaScript section.
|
|
kw_as, kw_async, kw_await, kw_declare, kw_finally, kw_from,
|
|
kw_function, kw_get, kw_import, kw_is, kw_let, kw_module, kw_readonly,
|
|
kw_set, kw_type, kw_typeof, kw_var, kw_yield,
|
|
// Keywords from the Java section.
|
|
kw_abstract, kw_extends, kw_implements, kw_instanceof, kw_interface});
|
|
}
|
|
|
|
// Context sensitive keywords.
|
|
IdentifierInfo *kw_final;
|
|
IdentifierInfo *kw_override;
|
|
IdentifierInfo *kw_in;
|
|
IdentifierInfo *kw_of;
|
|
IdentifierInfo *kw_CF_CLOSED_ENUM;
|
|
IdentifierInfo *kw_CF_ENUM;
|
|
IdentifierInfo *kw_CF_OPTIONS;
|
|
IdentifierInfo *kw_NS_CLOSED_ENUM;
|
|
IdentifierInfo *kw_NS_ENUM;
|
|
IdentifierInfo *kw_NS_OPTIONS;
|
|
IdentifierInfo *kw___except;
|
|
IdentifierInfo *kw___has_include;
|
|
IdentifierInfo *kw___has_include_next;
|
|
|
|
// JavaScript keywords.
|
|
IdentifierInfo *kw_as;
|
|
IdentifierInfo *kw_async;
|
|
IdentifierInfo *kw_await;
|
|
IdentifierInfo *kw_declare;
|
|
IdentifierInfo *kw_finally;
|
|
IdentifierInfo *kw_from;
|
|
IdentifierInfo *kw_function;
|
|
IdentifierInfo *kw_get;
|
|
IdentifierInfo *kw_import;
|
|
IdentifierInfo *kw_infer;
|
|
IdentifierInfo *kw_is;
|
|
IdentifierInfo *kw_let;
|
|
IdentifierInfo *kw_module;
|
|
IdentifierInfo *kw_readonly;
|
|
IdentifierInfo *kw_set;
|
|
IdentifierInfo *kw_type;
|
|
IdentifierInfo *kw_typeof;
|
|
IdentifierInfo *kw_var;
|
|
IdentifierInfo *kw_yield;
|
|
|
|
// Java keywords.
|
|
IdentifierInfo *kw_abstract;
|
|
IdentifierInfo *kw_assert;
|
|
IdentifierInfo *kw_extends;
|
|
IdentifierInfo *kw_implements;
|
|
IdentifierInfo *kw_instanceof;
|
|
IdentifierInfo *kw_interface;
|
|
IdentifierInfo *kw_native;
|
|
IdentifierInfo *kw_package;
|
|
IdentifierInfo *kw_synchronized;
|
|
IdentifierInfo *kw_throws;
|
|
|
|
// Pragma keywords.
|
|
IdentifierInfo *kw_mark;
|
|
|
|
// Proto keywords.
|
|
IdentifierInfo *kw_extend;
|
|
IdentifierInfo *kw_option;
|
|
IdentifierInfo *kw_optional;
|
|
IdentifierInfo *kw_repeated;
|
|
IdentifierInfo *kw_required;
|
|
IdentifierInfo *kw_returns;
|
|
|
|
// QT keywords.
|
|
IdentifierInfo *kw_signals;
|
|
IdentifierInfo *kw_qsignals;
|
|
IdentifierInfo *kw_slots;
|
|
IdentifierInfo *kw_qslots;
|
|
|
|
// C# keywords
|
|
IdentifierInfo *kw_dollar;
|
|
IdentifierInfo *kw_base;
|
|
IdentifierInfo *kw_byte;
|
|
IdentifierInfo *kw_checked;
|
|
IdentifierInfo *kw_decimal;
|
|
IdentifierInfo *kw_delegate;
|
|
IdentifierInfo *kw_event;
|
|
IdentifierInfo *kw_fixed;
|
|
IdentifierInfo *kw_foreach;
|
|
IdentifierInfo *kw_implicit;
|
|
IdentifierInfo *kw_internal;
|
|
|
|
IdentifierInfo *kw_lock;
|
|
IdentifierInfo *kw_null;
|
|
IdentifierInfo *kw_object;
|
|
IdentifierInfo *kw_out;
|
|
|
|
IdentifierInfo *kw_params;
|
|
|
|
IdentifierInfo *kw_ref;
|
|
IdentifierInfo *kw_string;
|
|
IdentifierInfo *kw_stackalloc;
|
|
IdentifierInfo *kw_sbyte;
|
|
IdentifierInfo *kw_sealed;
|
|
IdentifierInfo *kw_uint;
|
|
IdentifierInfo *kw_ulong;
|
|
IdentifierInfo *kw_unchecked;
|
|
IdentifierInfo *kw_unsafe;
|
|
IdentifierInfo *kw_ushort;
|
|
IdentifierInfo *kw_when;
|
|
IdentifierInfo *kw_where;
|
|
|
|
/// Returns \c true if \p Tok is a true JavaScript identifier, returns
|
|
/// \c false if it is a keyword or a pseudo keyword.
|
|
/// If \c AcceptIdentifierName is true, returns true not only for keywords,
|
|
// but also for IdentifierName tokens (aka pseudo-keywords), such as
|
|
// ``yield``.
|
|
bool IsJavaScriptIdentifier(const FormatToken &Tok,
|
|
bool AcceptIdentifierName = true) const {
|
|
// Based on the list of JavaScript & TypeScript keywords here:
|
|
// https://github.com/microsoft/TypeScript/blob/master/src/compiler/scanner.ts#L74
|
|
switch (Tok.Tok.getKind()) {
|
|
case tok::kw_break:
|
|
case tok::kw_case:
|
|
case tok::kw_catch:
|
|
case tok::kw_class:
|
|
case tok::kw_continue:
|
|
case tok::kw_const:
|
|
case tok::kw_default:
|
|
case tok::kw_delete:
|
|
case tok::kw_do:
|
|
case tok::kw_else:
|
|
case tok::kw_enum:
|
|
case tok::kw_export:
|
|
case tok::kw_false:
|
|
case tok::kw_for:
|
|
case tok::kw_if:
|
|
case tok::kw_import:
|
|
case tok::kw_module:
|
|
case tok::kw_new:
|
|
case tok::kw_private:
|
|
case tok::kw_protected:
|
|
case tok::kw_public:
|
|
case tok::kw_return:
|
|
case tok::kw_static:
|
|
case tok::kw_switch:
|
|
case tok::kw_this:
|
|
case tok::kw_throw:
|
|
case tok::kw_true:
|
|
case tok::kw_try:
|
|
case tok::kw_typeof:
|
|
case tok::kw_void:
|
|
case tok::kw_while:
|
|
// These are JS keywords that are lexed by LLVM/clang as keywords.
|
|
return false;
|
|
case tok::identifier: {
|
|
// For identifiers, make sure they are true identifiers, excluding the
|
|
// JavaScript pseudo-keywords (not lexed by LLVM/clang as keywords).
|
|
bool IsPseudoKeyword =
|
|
JsExtraKeywords.find(Tok.Tok.getIdentifierInfo()) !=
|
|
JsExtraKeywords.end();
|
|
return AcceptIdentifierName || !IsPseudoKeyword;
|
|
}
|
|
default:
|
|
// Other keywords are handled in the switch below, to avoid problems due
|
|
// to duplicate case labels when using the #include trick.
|
|
break;
|
|
}
|
|
|
|
switch (Tok.Tok.getKind()) {
|
|
// Handle C++ keywords not included above: these are all JS identifiers.
|
|
#define KEYWORD(X, Y) case tok::kw_##X:
|
|
#include "clang/Basic/TokenKinds.def"
|
|
// #undef KEYWORD is not needed -- it's #undef-ed at the end of
|
|
// TokenKinds.def
|
|
return true;
|
|
default:
|
|
// All other tokens (punctuation etc) are not JS identifiers.
|
|
return false;
|
|
}
|
|
}
|
|
|
|
/// Returns \c true if \p Tok is a C# keyword, returns
|
|
/// \c false if it is a anything else.
|
|
bool isCSharpKeyword(const FormatToken &Tok) const {
|
|
switch (Tok.Tok.getKind()) {
|
|
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_continue:
|
|
case tok::kw_default:
|
|
case tok::kw_do:
|
|
case tok::kw_double:
|
|
case tok::kw_else:
|
|
case tok::kw_enum:
|
|
case tok::kw_explicit:
|
|
case tok::kw_extern:
|
|
case tok::kw_false:
|
|
case tok::kw_float:
|
|
case tok::kw_for:
|
|
case tok::kw_goto:
|
|
case tok::kw_if:
|
|
case tok::kw_int:
|
|
case tok::kw_long:
|
|
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_return:
|
|
case tok::kw_short:
|
|
case tok::kw_sizeof:
|
|
case tok::kw_static:
|
|
case tok::kw_struct:
|
|
case tok::kw_switch:
|
|
case tok::kw_this:
|
|
case tok::kw_throw:
|
|
case tok::kw_true:
|
|
case tok::kw_try:
|
|
case tok::kw_typeof:
|
|
case tok::kw_using:
|
|
case tok::kw_virtual:
|
|
case tok::kw_void:
|
|
case tok::kw_volatile:
|
|
case tok::kw_while:
|
|
return true;
|
|
default:
|
|
return Tok.is(tok::identifier) &&
|
|
CSharpExtraKeywords.find(Tok.Tok.getIdentifierInfo()) ==
|
|
CSharpExtraKeywords.end();
|
|
}
|
|
}
|
|
|
|
private:
|
|
/// The JavaScript keywords beyond the C++ keyword set.
|
|
std::unordered_set<IdentifierInfo *> JsExtraKeywords;
|
|
|
|
/// The C# keywords beyond the C++ keyword set
|
|
std::unordered_set<IdentifierInfo *> CSharpExtraKeywords;
|
|
};
|
|
|
|
} // namespace format
|
|
} // namespace clang
|
|
|
|
#endif
|