#ifndef LLVM_SUPPORT_FORMAT_H
#define LLVM_SUPPORT_FORMAT_H
+#include "llvm/ADT/STLExtras.h"
#include "llvm/ADT/StringRef.h"
#include "llvm/Support/DataTypes.h"
#include <cassert>
#include <cstdio>
-#ifdef _MSC_VER
-// FIXME: This define is wrong:
-// - _snprintf does not guarantee that trailing null is always added - if
-// there is no space for null, it does not report any error.
-// - According to C++ standard, snprintf should be visible in the 'std'
-// namespace - this define makes this impossible.
-#define snprintf _snprintf
-#endif
+#include <tuple>
namespace llvm {
/// printed, this synthesizes the string into a temporary buffer provided and
/// returns whether or not it is big enough.
-template <typename T>
-class format_object1 final : public format_object_base {
- T Val;
-public:
- format_object1(const char *fmt, const T &val)
- : format_object_base(fmt), Val(val) {
- }
-
- int snprint(char *Buffer, unsigned BufferSize) const override {
- return snprintf(Buffer, BufferSize, Fmt, Val);
- }
-};
-
-template <typename T1, typename T2>
-class format_object2 final : public format_object_base {
- T1 Val1;
- T2 Val2;
-public:
- format_object2(const char *fmt, const T1 &val1, const T2 &val2)
- : format_object_base(fmt), Val1(val1), Val2(val2) {
- }
-
- int snprint(char *Buffer, unsigned BufferSize) const override {
- return snprintf(Buffer, BufferSize, Fmt, Val1, Val2);
- }
-};
-
-template <typename T1, typename T2, typename T3>
-class format_object3 final : public format_object_base {
- T1 Val1;
- T2 Val2;
- T3 Val3;
-public:
- format_object3(const char *fmt, const T1 &val1, const T2 &val2,const T3 &val3)
- : format_object_base(fmt), Val1(val1), Val2(val2), Val3(val3) {
- }
-
- int snprint(char *Buffer, unsigned BufferSize) const override {
- return snprintf(Buffer, BufferSize, Fmt, Val1, Val2, Val3);
- }
-};
-
-template <typename T1, typename T2, typename T3, typename T4>
-class format_object4 final : public format_object_base {
- T1 Val1;
- T2 Val2;
- T3 Val3;
- T4 Val4;
-public:
- format_object4(const char *fmt, const T1 &val1, const T2 &val2,
- const T3 &val3, const T4 &val4)
- : format_object_base(fmt), Val1(val1), Val2(val2), Val3(val3), Val4(val4) {
- }
+template <typename... Ts>
+class format_object final : public format_object_base {
+ std::tuple<Ts...> Vals;
- int snprint(char *Buffer, unsigned BufferSize) const override {
- return snprintf(Buffer, BufferSize, Fmt, Val1, Val2, Val3, Val4);
+ template <std::size_t... Is>
+ int snprint_tuple(char *Buffer, unsigned BufferSize,
+ index_sequence<Is...>) const {
+#ifdef _MSC_VER
+ return _snprintf(Buffer, BufferSize, Fmt, std::get<Is>(Vals)...);
+#else
+ return std::snprintf(Buffer, BufferSize, Fmt, std::get<Is>(Vals)...);
+#endif
}
-};
-template <typename T1, typename T2, typename T3, typename T4, typename T5>
-class format_object5 final : public format_object_base {
- T1 Val1;
- T2 Val2;
- T3 Val3;
- T4 Val4;
- T5 Val5;
public:
- format_object5(const char *fmt, const T1 &val1, const T2 &val2,
- const T3 &val3, const T4 &val4, const T5 &val5)
- : format_object_base(fmt), Val1(val1), Val2(val2), Val3(val3), Val4(val4),
- Val5(val5) {
- }
+ format_object(const char *fmt, const Ts &... vals)
+ : format_object_base(fmt), Vals(vals...) {}
int snprint(char *Buffer, unsigned BufferSize) const override {
- return snprintf(Buffer, BufferSize, Fmt, Val1, Val2, Val3, Val4, Val5);
- }
-};
-
-template <typename T1, typename T2, typename T3, typename T4, typename T5,
- typename T6>
-class format_object6 final : public format_object_base {
- T1 Val1;
- T2 Val2;
- T3 Val3;
- T4 Val4;
- T5 Val5;
- T6 Val6;
-public:
- format_object6(const char *Fmt, const T1 &Val1, const T2 &Val2,
- const T3 &Val3, const T4 &Val4, const T5 &Val5, const T6 &Val6)
- : format_object_base(Fmt), Val1(Val1), Val2(Val2), Val3(Val3), Val4(Val4),
- Val5(Val5), Val6(Val6) { }
-
- int snprint(char *Buffer, unsigned BufferSize) const override {
- return snprintf(Buffer, BufferSize, Fmt, Val1, Val2, Val3, Val4, Val5, Val6);
+ return snprint_tuple(Buffer, BufferSize, index_sequence_for<Ts...>());
}
};
/// OS << format("%0.4f", myfloat) << '\n';
/// \endcode
-template <typename T>
-inline format_object1<T> format(const char *Fmt, const T &Val) {
- return format_object1<T>(Fmt, Val);
-}
-
-template <typename T1, typename T2>
-inline format_object2<T1, T2> format(const char *Fmt, const T1 &Val1,
- const T2 &Val2) {
- return format_object2<T1, T2>(Fmt, Val1, Val2);
-}
-
-template <typename T1, typename T2, typename T3>
- inline format_object3<T1, T2, T3> format(const char *Fmt, const T1 &Val1,
- const T2 &Val2, const T3 &Val3) {
- return format_object3<T1, T2, T3>(Fmt, Val1, Val2, Val3);
-}
-
-template <typename T1, typename T2, typename T3, typename T4>
-inline format_object4<T1, T2, T3, T4> format(const char *Fmt, const T1 &Val1,
- const T2 &Val2, const T3 &Val3,
- const T4 &Val4) {
- return format_object4<T1, T2, T3, T4>(Fmt, Val1, Val2, Val3, Val4);
-}
-
-template <typename T1, typename T2, typename T3, typename T4, typename T5>
-inline format_object5<T1, T2, T3, T4, T5> format(const char *Fmt,const T1 &Val1,
- const T2 &Val2, const T3 &Val3,
- const T4 &Val4, const T5 &Val5) {
- return format_object5<T1, T2, T3, T4, T5>(Fmt, Val1, Val2, Val3, Val4, Val5);
-}
-
-template <typename T1, typename T2, typename T3, typename T4, typename T5,
- typename T6>
-inline format_object6<T1, T2, T3, T4, T5, T6>
-format(const char *Fmt, const T1 &Val1, const T2 &Val2, const T3 &Val3,
- const T4 &Val4, const T5 &Val5, const T6 &Val6) {
- return format_object6<T1, T2, T3, T4, T5, T6>(Fmt, Val1, Val2, Val3, Val4,
- Val5, Val6);
+template <typename... Ts>
+inline format_object<Ts...> format(const char *Fmt, const Ts &... Vals) {
+ return format_object<Ts...>(Fmt, Vals...);
}
/// This is a helper class used for left_justify() and right_justify().
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