1 //===--- PrettyPrinter.h - Classes for aiding with AST printing -*- C++ -*-===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file defines the PrinterHelper interface.
12 //===----------------------------------------------------------------------===//
14 #ifndef LLVM_CLANG_AST_PRETTY_PRINTER_H
15 #define LLVM_CLANG_AST_PRETTY_PRINTER_H
17 #include "clang/Basic/LLVM.h"
18 #include "clang/Basic/LangOptions.h"
29 virtual ~PrinterHelper();
30 virtual bool handledStmt(Stmt* E, raw_ostream& OS) = 0;
33 /// \brief Describes how types, statements, expressions, and
34 /// declarations should be printed.
35 struct PrintingPolicy {
36 /// \brief Create a default printing policy for C.
37 PrintingPolicy(const LangOptions &LO)
38 : LangOpts(LO), Indentation(2), SuppressSpecifiers(false),
39 SuppressTagKeyword(false), SuppressTag(false), SuppressScope(false),
40 SuppressUnwrittenScope(false), SuppressInitializers(false),
41 ConstantArraySizeAsWritten(false), AnonymousTagLocations(true),
42 SuppressStrongLifetime(false), SuppressLifetimeQualifiers(false),
43 Bool(LO.Bool), TerseOutput(false), PolishForDeclaration(false),
44 MSWChar(LO.MicrosoftExt && !LO.WChar) { }
46 /// \brief What language we're printing.
49 /// \brief The number of spaces to use to indent each line.
50 unsigned Indentation : 8;
52 /// \brief Whether we should suppress printing of the actual specifiers for
53 /// the given type or declaration.
55 /// This flag is only used when we are printing declarators beyond
56 /// the first declarator within a declaration group. For example, given:
62 /// SuppressSpecifiers will be false when printing the
63 /// declaration for "x", so that we will print "int *x"; it will be
64 /// \c true when we print "y", so that we suppress printing the
65 /// "const int" type specifier and instead only print the "*y".
66 bool SuppressSpecifiers : 1;
68 /// \brief Whether type printing should skip printing the tag keyword.
70 /// This is used when printing the inner type of elaborated types,
71 /// (as the tag keyword is part of the elaborated type):
74 /// struct Geometry::Point;
76 bool SuppressTagKeyword : 1;
78 /// \brief Whether type printing should skip printing the actual tag type.
80 /// This is used when the caller needs to print a tag definition in front
81 /// of the type, as in constructs like the following:
84 /// typedef struct { int x, y; } Point;
88 /// \brief Suppresses printing of scope specifiers.
89 bool SuppressScope : 1;
91 /// \brief Suppress printing parts of scope specifiers that don't need
92 /// to be written, e.g., for inline or anonymous namespaces.
93 bool SuppressUnwrittenScope : 1;
95 /// \brief Suppress printing of variable initializers.
97 /// This flag is used when printing the loop variable in a for-range
98 /// statement. For example, given:
101 /// for (auto x : coll)
104 /// SuppressInitializers will be true when printing "auto x", so that the
105 /// internal initializer constructed for x will not be printed.
106 bool SuppressInitializers : 1;
108 /// \brief Whether we should print the sizes of constant array expressions
109 /// as written in the sources.
111 /// This flag is determines whether arrays types declared as
115 /// char a[] = "A string";
118 /// will be printed as written or as follows:
122 /// char a[9] = "A string";
124 bool ConstantArraySizeAsWritten : 1;
126 /// \brief When printing an anonymous tag name, also print the location of
127 /// that entity (e.g., "enum <anonymous at t.h:10:5>"). Otherwise, just
128 /// prints "<anonymous>" for the name.
129 bool AnonymousTagLocations : 1;
131 /// \brief When true, suppress printing of the __strong lifetime qualifier in
133 unsigned SuppressStrongLifetime : 1;
135 /// \brief When true, suppress printing of lifetime qualifier in
137 unsigned SuppressLifetimeQualifiers : 1;
139 /// \brief Whether we can use 'bool' rather than '_Bool', even if the language
140 /// doesn't actually have 'bool' (because, e.g., it is defined as a macro).
143 /// \brief Provide a 'terse' output.
145 /// For example, in this mode we don't print function bodies, class members,
146 /// declarations inside namespaces etc. Effectively, this should print
147 /// only the requested declaration.
148 unsigned TerseOutput : 1;
150 /// \brief When true, do certain refinement needed for producing proper
151 /// declaration tag; such as, do not print attributes attached to the declaration.
153 unsigned PolishForDeclaration : 1;
155 /// \brief When true, print the built-in wchar_t type as __wchar_t. For use in
156 /// Microsoft mode when wchar_t is not available.
157 unsigned MSWChar : 1;
160 } // end namespace clang