【Poco】Poco::Format的例子

#include "../tmain.hpp"/*Following are valid type specifications and their meaning:b boolean (true = 1, false = 0)c characterd signed decimal integeri signed decimal integero unsigned octal integeru unsigned decimal integerx unsigned hexadecimal integer (lower case)X unsigned hexadecimal integer (upper case)e signed floating-point value in the form [-]d.dddde[<sign>]dd[d]E signed floating-point value in the form [-]d.ddddE[<sign>]dd[d]f signed floating-point value in the form [-]dddd.dddds std::stringz std::size_tThe following flags are supported:- left align the result within the given field width+ prefix the output value with a sign (+ or -) if the output value is of a signed type0 if width is prefixed with 0, zeros are added until the minimum width is reached# For o, x, X, the # flag prefixes any nonzero output value with 0, 0x, or 0X, respectively; for e, E, f, the # flag forces the output value to contain a decimal point in all cases.The following modifiers are supported:(none) argument is char (c), int (d, i), unsigned (o, u, x, X) double (e, E, f, g, G) or string (s)l argument is long (d, i), unsigned long (o, u, x, X) or long double (e, E, f, g, G)L argument is long long (d, i), unsigned long long (o, u, x, X)h argument is short (d, i), unsigned short (o, u, x, X) or float (e, E, f, g, G)? argument is any signed or unsigned int, short, long, or 64-bit integer (d, i, o, x, X)*/void test_FormatChar(){char c = 'a';std::string s(Poco::format("%c", c));assert (s == "a");s = Poco::format("%2c", c);assert (s == " a");s = Poco::format("%-2c", c);assert (s == "a ");s = Poco::format("%c", std::string("foo"));assert (s == "[ERRFMT]");}void test_FormatInt(){int i = 42;std::string s(Poco::format("%d", i));assert (s == "42");s = Poco::format("%4d", i);assert (s == "  42");s = Poco::format("%04d", i);assert (s == "0042");unsigned int x = 0xaa;s = Poco::format("%x", x);assert (s == "aa");s = Poco::format("%X", x);assert (s == "AA");i = 42;s = Poco::format("%+d", i);assert (s == "+42");}void test_FormatBoolean(){bool b = true;std::string s = Poco::format("%b", b);assert (s == "1");b = false;s = Poco::format("%b", b);assert (s == "0");std::vector<Poco::Any> bv;bv.push_back(false);bv.push_back(true);bv.push_back(false);bv.push_back(true);bv.push_back(false);bv.push_back(true);bv.push_back(false);bv.push_back(true);bv.push_back(false);bv.push_back(true);s.clear();Poco::format(s, "%b%b%b%b%b%b%b%b%b%b", bv);assert (s == "0101010101");}void test_FormatFloatFix(){double d = 1.5;std::string s(Poco::format("%f", d));assert (s.find("1.50") == 0);s = Poco::format("%10f", d);assert (s.find(" 1.50") != std::string::npos);s = Poco::format("%6.2f", d);assert (s == "  1.50");s = Poco::format("%-6.2f", d);assert (s == "1.50  ");float f = 1.5;s = Poco::format("%hf", f);assert (s.find("1.50") == 0);}void test_FormatFloatSci(){double d = 1.5;std::string s(Poco::format("%e", d));assert (s.find("1.50") == 0);assert (s.find("0e+0") != std::string::npos);s = Poco::format("%20e", d);assert (s.find(" 1.50") != std::string::npos);assert (s.find("0e+0") != std::string::npos);s = Poco::format("%10.2e", d);assert (s == " 1.50e+000" || s == "  1.50e+00");s = Poco::format("%-10.2e", d);assert (s == "1.50e+000 " || s == "1.50e+00  ");s = Poco::format("%-10.2E", d);assert (s == "1.50E+000 " || s == "1.50E+00  ");}void test_FormatString(){std::string foo("foo");std::string s(Poco::format("%s", foo));assert (s == "foo");s = Poco::format("%5s", foo);assert (s == "  foo");s = Poco::format("%-5s", foo);assert (s == "foo  ");s = Poco::format("%s%%a", foo);assert (s == "foo%a");s = Poco::format("'%s%%''%s%%'", foo, foo);assert (s == "'foo%''foo%'");}void test_FormateMutil(){std::string s(Poco::format("aaa%dbbb%4dccc", 1, 2));assert (s == "aaa1bbb   2ccc");s = Poco::format("%%%d%%%d%%%d", 1, 2, 3);assert (s == "%1%2%3");s = Poco::format("%d%d%d%d", 1, 2, 3, 4);assert (s == "1234");s = Poco::format("%d%d%d%d%d", 1, 2, 3, 4, 5);assert (s == "12345");s = Poco::format("%d%d%d%d%d%d", 1, 2, 3, 4, 5, 6);assert (s == "123456");}void test_FormatIndex(){std::string s(Poco::format("%[1]d%[0]d", 1, 2));assert (s == "21");s = Poco::format("%[5]d%[4]d%[3]d%[2]d%[1]d%[0]d", 1, 2, 3, 4, 5, 6);assert (s == "654321");s = Poco::format("%%%[1]d%%%[2]d%%%d", 1, 2, 3);assert (s == "%2%3%1");}