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annotate gen/logger.h @ 1635:601d3eea4a68

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Make -nodefaultlib override -de{fault,bug}lib=foo instead of vice versa.
author Matti Niemenmaa <matti.niemenmaa+hg@iki.fi>
date Fri, 05 Mar 2010 21:40:51 +0200
parents 2292878925f4
children 40bd4a0d4870
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1 #ifndef _llvmd_gen_logger_h_
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2 #define _llvmd_gen_logger_h_
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4 #include <iosfwd>
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5
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6 namespace llvm {
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7 class Type;
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8 class Value;
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9 }
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11 #ifndef IS_PRINTF
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12 # ifdef __GNUC__
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13 # define IS_PRINTF(FMTARG) __attribute((__format__ (__printf__, (FMTARG), (FMTARG)+1) ))
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14 # else
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15 # define IS_PRINTF(FMTARG)
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16 # endif
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17 #endif
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19 struct Loc;
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21 class Stream {
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22 std::ostream* OS;
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23
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24 public:
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25 Stream() : OS(0) {}
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26 Stream(std::ostream* S) : OS(S) {}
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27 Stream(std::ostream& S) : OS(&S) {}
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28
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29 Stream operator << (std::ios_base &(*Func)(std::ios_base&)) {
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30 if (OS) *OS << Func;
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31 return *this;
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32 }
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33
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34 Stream operator << (std::ostream &(*Func)(std::ostream&)) {
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35 if (OS) *OS << Func;
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36 return *this;
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37 }
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38
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39 template<typename Ty>
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40 Stream& operator << (const Ty& Thing) {
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41 if (OS)
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42 Writer<Ty, sizeof(sfinae_bait(Thing))>::write(*OS, Thing);
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43 return *this;
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44 }
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45
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46 private:
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47 // Implementation details to treat llvm::Value, llvm::Type and their
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48 // subclasses specially (to pretty-print types).
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49
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50 static void writeType(std::ostream& OS, const llvm::Type& Ty);
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51 static void writeValue(std::ostream& OS, const llvm::Value& Ty);
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52
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53 template<typename Ty, int N> friend struct Writer;
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54 // error: function template partial specialization is not allowed
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55 // So I guess type partial specialization + member function will have to do...
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56 template<typename Ty, int N>
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57 struct Writer {
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58 static void write(std::ostream& OS, const Ty& Thing) {
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59 OS << Thing;
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60 }
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61 };
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62
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63 template<typename Ty>
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64 struct Writer<Ty, 1> {
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65 static void write(std::ostream& OS, const llvm::Type& Thing) {
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66 Stream::writeType(OS, Thing);
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67 }
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68 static void write(std::ostream& OS, const llvm::Value& Thing) {
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69 Stream::writeValue(OS, Thing);
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70 }
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71 };
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72
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73 // NOT IMPLEMENTED
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74 char sfinae_bait(const llvm::Type&);
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75 char sfinae_bait(const llvm::Value&);
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76 short sfinae_bait(...);
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77 };
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78
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79 namespace Logger
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80 {
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81 void indent();
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82 void undent();
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83 Stream cout();
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84 void println(const char* fmt, ...) IS_PRINTF(1);
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85 void print(const char* fmt, ...) IS_PRINTF(1);
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86 void enable();
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87 void disable();
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88 bool enabled();
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89
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90 void attention(Loc loc, const char* fmt, ...) IS_PRINTF(2);
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91
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92 struct LoggerScope
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93 {
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94 LoggerScope()
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95 {
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96 Logger::indent();
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97 }
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98 ~LoggerScope()
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99 {
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100 Logger::undent();
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101 }
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102 };
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103 }
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104
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105 #define LOG_SCOPE Logger::LoggerScope _logscope;
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106
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107 #define IF_LOG if (Logger::enabled())
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108
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109 #endif
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110