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), Bool(LO.Bool),
43 TerseOutput(false), PolishForDeclaration(false) { }
45 /// \brief What language we're printing.
48 /// \brief The number of spaces to use to indent each line.
49 unsigned Indentation : 8;
51 /// \brief Whether we should suppress printing of the actual specifiers for
52 /// the given type or declaration.
54 /// This flag is only used when we are printing declarators beyond
55 /// the first declarator within a declaration group. For example, given:
61 /// SuppressSpecifiers will be false when printing the
62 /// declaration for "x", so that we will print "int *x"; it will be
63 /// \c true when we print "y", so that we suppress printing the
64 /// "const int" type specifier and instead only print the "*y".
65 bool SuppressSpecifiers : 1;
67 /// \brief Whether type printing should skip printing the tag keyword.
69 /// This is used when printing the inner type of elaborated types,
70 /// (as the tag keyword is part of the elaborated type):
73 /// struct Geometry::Point;
75 bool SuppressTagKeyword : 1;
77 /// \brief Whether type printing should skip printing the actual tag type.
79 /// This is used when the caller needs to print a tag definition in front
80 /// of the type, as in constructs like the following:
83 /// typedef struct { int x, y; } Point;
87 /// \brief Suppresses printing of scope specifiers.
88 bool SuppressScope : 1;
90 /// \brief Suppress printing parts of scope specifiers that don't need
91 /// to be written, e.g., for inline or anonymous namespaces.
92 bool SuppressUnwrittenScope : 1;
94 /// \brief Suppress printing of variable initializers.
96 /// This flag is used when printing the loop variable in a for-range
97 /// statement. For example, given:
100 /// for (auto x : coll)
103 /// SuppressInitializers will be true when printing "auto x", so that the
104 /// internal initializer constructed for x will not be printed.
105 bool SuppressInitializers : 1;
107 /// \brief Whether we should print the sizes of constant array expressions
108 /// as written in the sources.
110 /// This flag is determines whether arrays types declared as
114 /// char a[] = "A string";
117 /// will be printed as written or as follows:
121 /// char a[9] = "A string";
123 bool ConstantArraySizeAsWritten : 1;
125 /// \brief When printing an anonymous tag name, also print the location of
126 /// that entity (e.g., "enum <anonymous at t.h:10:5>"). Otherwise, just
127 /// prints "<anonymous>" for the name.
128 bool AnonymousTagLocations : 1;
130 /// \brief When true, suppress printing of the __strong lifetime qualifier in
132 unsigned SuppressStrongLifetime : 1;
134 /// \brief Whether we can use 'bool' rather than '_Bool', even if the language
135 /// doesn't actually have 'bool' (because, e.g., it is defined as a macro).
138 /// \brief Provide a 'terse' output.
140 /// For example, in this mode we don't print function bodies, class members,
141 /// declarations inside namespaces etc. Effectively, this should print
142 /// only the requested declaration.
143 unsigned TerseOutput : 1;
145 /// \brief When true, do certain refinement needed for producing proper
146 /// declaration tag; such as, do not print attributes attached to the declaration.
148 unsigned PolishForDeclaration : 1;
151 } // end namespace clang