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Plumbing: Use variadic templates for format()

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- Use variadic templates, with a slight twist for properly supporting
  Taskwarrior's l10n strings.
- Adjust code that relied on implicit type conversion which led to
  problems with template instantiation.
- Move some functionality out of format() in order to keep it generic.
This commit is contained in:
Wilhelm Schuermann 2015-06-07 20:36:21 +02:00
parent f0fbdaf2c9
commit e95167a984
6 changed files with 73 additions and 218 deletions
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43
src/text.h
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@ -28,6 +28,7 @@
#define INCLUDED_TEXT
#include <set>
#include <sstream>
#include <string>
#include <vector>
@ -58,27 +59,39 @@ std::string::size_type find (const std::string&, const std::string&, bool sensit
std::string::size_type find (const std::string&, const std::string&, std::string::size_type, bool sensitive = true);
int strippedLength (const std::string&);
const std::string obfuscateText (const std::string&);
const std::string format (std::string&);
const std::string format (const char*);
const std::string format (char);
const std::string format (int);
const std::string format (unsigned int);
const std::string format (long);
const std::string format (unsigned long);
const std::string formatHex (int);
const std::string format (float, int, int);
const std::string format (double, int, int);
const std::string format (double);
const std::string format (const std::string&, const std::string&);
const std::string format (const std::string&, int);
const std::string format (const std::string&, const std::string&, const std::string&);
const std::string format (const std::string&, const std::string&, int);
const std::string format (const std::string&, const std::string&, double);
const std::string format (const std::string&, int, int, const std::string&);
const std::string format (const std::string&, int, const std::string&);
const std::string format (const std::string&, int, const std::string&, const std::string&);
const std::string format (const std::string&, int, const std::string&, const std::string&, const std::string&);
const std::string format (const std::string&, int, int);
const std::string format (const std::string&, int, int, int);
const std::string format (const std::string&, int, int, int, int);
const std::string format (const std::string&, int, double);
const std::string format (const std::string&, const std::string&, const std::string&, const std::string&);
const std::string format (const std::string&, const std::string&, const std::string&, const std::string&, const std::string&);
void replace_positional (std::string&, const std::string&, const std::string&);
template<typename T>
const std::string format (int fmt_num, const std::string& fmt, T arg)
{
std::string output = fmt;
replace_positional (output, "{" + std::to_string(fmt_num) + "}", format (arg));
return output;
}
template<typename T, typename... Args>
const std::string format (int fmt_num, const std::string& fmt, T arg, Args... args)
{
const std::string fmt_replaced (format (fmt_num, fmt, arg));
return format (fmt_num+1, fmt_replaced, args...);
}
template<typename... Args>
const std::string format (const std::string& fmt, Args... args)
{
return format (1, fmt, args...);
}
std::string leftJustify (const int, const int);
std::string leftJustify (const std::string&, const int);