fmt.h File Reference

(v2.0)

Utilities for formatting strings. More...

#include <cstdio>
#include <cstdarg>
#include <chrono>
#include <string>
#include <sstream>
#include <iostream>
#include <utility>
#include <tomographer2/tools/cxxutil.h>

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Classes
class	Tomographer::Tools::BadFmtsFormat
	Exception for bad printf format. More...
struct	Tomographer::Tools::hasOStreamOp< T >
	Traits class to see whether an object exposes a "<<" operator overload for std::ostream. More...

Namespaces
	Tomographer
	Base namespace for the Tomographer project.
	Tomographer::Tools
	Various useful tools.

Macros
#define	streamstr(tokens)
	Utility macro to format stream tokens to a std::string. More...
#define	streamcstr(tokens)   streamstr(tokens).c_str()
	Utility macro to format stream tokens to a C string. More...

Functions
std::string	Tomographer::Tools::vfmts (const char *fmt, va_list vl)
	printf- formatting to a std::string, with va_list pointer More...
std::string	Tomographer::Tools::fmts (const char *fmt,...)
	printf- format to a std::string More...
template<typename T >
_Unspecified	Tomographer::Tools::streamIfPossible (const T &obj)
	Utility to stream an object, but only if "<<" overload exists. More...
template<typename T >
_Unspecified	Tomographer::Tools::streamIfPossible (const T &obj, std::string before, std::string after=std::string(), std::string alternative="<"+std::string(typeid(T).name())+">")
	A slightly more sophisticated alternative to streamIfPossible() More...
std::string	Tomographer::Tools::fmtDuration (double seconds)
	Format a number of seconds into a human-readable string. More...
template<typename Rep , typename Period >
std::string	Tomographer::Tools::fmtDuration (std::chrono::duration< Rep, Period > dt)
	Format a std::chrono::duration into a human-readable string. More...

Detailed Description

Utilities for formatting strings.

Definition in file fmt.h.

Macro Definition Documentation

#define streamcstr

(

tokens

)

streamstr(tokens).c_str()

Utility macro to format stream tokens to a C string.

Shorthand for:

streamstr( tokens ).c_str()

Definition at line 157 of file fmt.h.

#define streamstr

(

tokens

)

Value:

dynamic_cast<std::ostringstream&>(            \
      std::ostringstream().seekp(0) << tokens   \
      ).str()                                   \

Utility macro to format stream tokens to a std::string.

Usage example:

Eigen::VectorXd x = ...;
std::string s = streamstr("x is = " << x.transpose());

This is typically useful if you want to feed in C++ objects to a printf()-like function.

Definition at line 145 of file fmt.h.