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/LangOptions.h"
31 virtual ~PrinterHelper();
32 virtual bool handledStmt(Stmt* E, llvm::raw_ostream& OS) = 0;
35 /// \brief Describes how types, statements, expressions, and
36 /// declarations should be printed.
37 struct PrintingPolicy {
38 /// \brief Create a default printing policy for C.
39 PrintingPolicy(const LangOptions &LO)
40 : Indentation(2), LangOpts(LO), SuppressSpecifiers(false),
41 SuppressTagKeyword(false), SuppressTag(false), SuppressScope(false),
42 SuppressInitializers(false),
43 Dump(false), ConstantArraySizeAsWritten(false),
44 AnonymousTagLocations(true), SuppressStrongLifetime(false) { }
46 /// \brief The number of spaces to use to indent each line.
47 unsigned Indentation : 8;
49 /// \brief What language we're printing.
50 const LangOptions LangOpts;
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 of variable initializers.
93 /// This flag is used when printing the loop variable in a for-range
94 /// statement. For example, given:
97 /// for (auto x : coll)
100 /// SuppressInitializers will be true when printing "auto x", so that the
101 /// internal initializer constructed for x will not be printed.
102 bool SuppressInitializers : 1;
104 /// \brief True when we are "dumping" rather than "pretty-printing",
105 /// where dumping involves printing the internal details of the AST
106 /// and pretty-printing involves printing something similar to
110 /// \brief Whether we should print the sizes of constant array expressions
111 /// as written in the sources.
113 /// This flag is determines whether arrays types declared as
117 /// char a[] = "A string";
120 /// will be printed as written or as follows:
124 /// char a[9] = "A string";
126 bool ConstantArraySizeAsWritten : 1;
128 /// \brief When printing an anonymous tag name, also print the location of
129 /// that entity (e.g., "enum <anonymous at t.h:10:5>"). Otherwise, just
130 /// prints "<anonymous>" for the name.
131 bool AnonymousTagLocations : 1;
133 /// \brief When true, suppress printing of the __strong lifetime qualifier in
135 unsigned SuppressStrongLifetime : 1;
138 } // end namespace clang