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Introduction

This is a small library of C++11 extensions that are predominantly compatible with the STL.

Featured extensions:

Feature Type Description
bit_mask class Bit mask/ flags/ options class.
command_line class Command line parser and data model for command line arguments and options.
cstring_view class Alternative to std::string_view from C++17, but with null terminated strings.
grid_vector wrapper Simple wrapper of std::vector for 2-dimensional element access.
join_string function Joins a string with fixed and optional values (e.g. for localization).
local_vector class Container that only occupies the stack but with compatible interface to std::vector.
member_function class Alternative to std::function to get access to the function pointer address.
multi_array class Multi dimensional array, similar to std::array.
path class Path string manager, iterator, and beautifier.
range_iterator class Iterator which keeps track of its range.

Examples

Example for ext::multi_array

// Classic C array
int classicArray[4][10][2];
classicArray[2][5][0] = 4;

// boost::multi_array
boost::multi_array<int, 3> boostArray(boost::extents[4][10][2]);
boostArray[2][5][0] = 4;

// ext::multi_array
ext::multi_array<int, 4, 10, 2> multiArray;
multiArray[2] = 3; // Set a value for an entire 'slice' (i.e. multiArray[2][x][y] = 3 for all 0 <= x < 10 and 0 <= y < 2)
multiArray[2][5][0] = 4; // Zero overhead in memory and speed compared to 'classicArray' when compiled in release mode (i.e. optimizations enabled)

Example for ext::join_string

// output is "undeclared identifier foo_bar"
std::cout << ext::join_string("undeclared identifier {0}", { "foo_bar" }) << std::endl;

// output is "always first, sometimes second"
std::cout << ext::join_string("always {0}[, sometimes {1}]", { "first", "second" }) << std::endl;

// output is "always first"
std::cout << ext::join_string("always {0}[, sometimes {1}]", { "first", "" }) << std::endl;

// output is "always first"
std::cout << ext::join_string("always {0}[, sometimes {1}]", { "first" }) << std::endl;

// output is "one 1, two 2, three 3"
std::cout << ext::join_string("one {0}[, two {1}[, three {2}]]", { "1", "2", "3" }) << std::endl;

// output is "one 1"
std::cout << ext::join_string("one {0}[, two {1}[, three {2}]]", { "1", "", "3" }) << std::endl;

// output is "one 1, three 3"
std::cout << ext::join_string("one {0}[, two {1}][, three {2}]", { "1", "", "3" }) << std::endl;

Example for ext::member_function

class Widget {
    int x_;
private:
    void set(int x) { x_ = x; }
    int get() const { return x_; }
    void print() { std::cout << x_ << std::endl; }
};

/* ... */

ext::member_function<Widget, void(int)>   setter  = &Widget::set;
ext::member_function<Widget, int() const> getter  = &Widget::get;
ext::member_function<Widget, void()>      printer = &Widget::print;

// Call member functions
Widget w;
setter(w, 42); // alternative to "w.set(42)"
printer(w, getter(w)); // alternative to "w.print(w.get())"

// Print raw function pointer addresses
std::cout << "Widget::set   = " << setter.ptr() << std::endl;
std::cout << "Widget::get   = " << getter.ptr() << std::endl;
std::cout << "Widget::print = " << petter.ptr() << std::endl;

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Small library of STL-like C++11 extensions

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