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@safe pure unittest
{
import std.format.read;
import std.format.spec : singleSpec;
auto str = "false";
auto spec = singleSpec("%s");
assert(str.unformatValue!bool(spec) == false);
str = "1";
spec = singleSpec("%d");
assert(str.unformatValue!bool(spec) == true);
}
@safe pure unittest
{
import std.format.read;
import std.format.spec : singleSpec;
auto str = "null";
auto spec = singleSpec("%s");
assert(str.unformatValue!(typeof(null))(spec) == null);
}
@safe pure unittest
{
import std.format.read;
import std.format.spec : singleSpec;
// signed decimal values
auto str = "123";
auto spec = singleSpec("%s");
assert(str.unformatValue!int(spec) == 123);
// hexadecimal values
str = "ABC";
spec = singleSpec("%X");
assert(str.unformatValue!int(spec) == 2748);
// octal values
str = "11610";
spec = singleSpec("%o");
assert(str.unformatValue!int(spec) == 5000);
// raw read, depends on endianess
str = "\x75\x01";
spec = singleSpec("%r");
auto result = str.unformatValue!short(spec);
assert(result == 373 /* little endian */ || result == 29953 /* big endian */ );
}
@safe pure unittest
{
import std.format.read;
import std.format.spec : singleSpec;
import std.math.operations : isClose;
// natural notation
auto str = "123.456";
auto spec = singleSpec("%s");
assert(str.unformatValue!double(spec).isClose(123.456));
// scientific notation
str = "1e17";
spec = singleSpec("%e");
assert(str.unformatValue!double(spec).isClose(1e17));
// raw read, depends on endianess
str = "\x40\x00\x00\xBF";
spec = singleSpec("%r");
auto result = str.unformatValue!float(spec);
assert(isClose(result, -0.5) /* little endian */ || isClose(result, 2.0) /* big endian */ );
}
@safe pure unittest
{
import std.format.read;
import std.format.spec : singleSpec;
// only the first character is read
auto str = "abc";
auto spec = singleSpec("%s");
assert(str.unformatValue!char(spec) == 'a');
// using a numerical format character treats the read number as unicode code point
str = "65";
spec = singleSpec("%d");
assert(str.unformatValue!char(spec) == 'A');
str = "41";
spec = singleSpec("%x");
assert(str.unformatValue!char(spec) == 'A');
str = "10003";
spec = singleSpec("%d");
assert(str.unformatValue!dchar(spec) == '✓');
}
@safe pure unittest
{
import std.format.read;
import std.format.spec : singleSpec;
// string value
string str = "aaa";
auto spec = singleSpec("%s");
assert(str.unformatValue!(dchar[])(spec) == "aaa"d);
// fixed size array with characters
str = "aaa";
spec = singleSpec("%s");
dchar[3] ret = ['a', 'a', 'a'];
assert(str.unformatValue!(dchar[3])(spec) == ret);
// dynamic array
str = "[1, 2, 3, 4]";
spec = singleSpec("%s");
assert(str.unformatValue!(int[])(spec) == [1, 2, 3, 4]);
// fixed size array with integers
str = "[1, 2, 3, 4]";
spec = singleSpec("%s");
int[4] ret2 = [1, 2, 3, 4];
assert(str.unformatValue!(int[4])(spec) == ret2);
// compound specifiers can be used for more control
str = "1,2,3";
spec = singleSpec("%(%s,%)");
assert(str.unformatValue!(int[])(spec) == [1, 2, 3]);
str = "cool";
spec = singleSpec("%(%c%)");
assert(str.unformatValue!(char[])(spec) == ['c', 'o', 'o', 'l']);
}
@safe pure unittest
{
import std.format.read;
import std.format.spec : singleSpec;
// as single value
auto str = `["one": 1, "two": 2]`;
auto spec = singleSpec("%s");
assert(str.unformatValue!(int[string])(spec) == ["one": 1, "two": 2]);
// with compound specifier for more control
str = "1/1, 2/4, 3/9";
spec = singleSpec("%(%d/%d%|, %)");
assert(str.unformatValue!(int[int])(spec) == [1: 1, 2: 4, 3: 9]);
}
@safe pure unittest
{
import std.format.read;
string object;
char cmp;
int value;
assert(formattedRead("angle < 36", "%s %c %d", object, cmp, value) == 3);
assert(object == "angle");
assert(cmp == '<');
assert(value == 36);
// reading may end early:
assert(formattedRead("length >", "%s %c %d", object, cmp, value) == 2);
assert(object == "length");
assert(cmp == '>');
// value is not changed:
assert(value == 36);
}
@safe pure unittest
{
import std.format.read;
string a;
int b;
double c;
assert("hello!124:34.5".formattedRead!"%s!%s:%s"(a, b, c) == 3);
assert(a == "hello");
assert(b == 124);
assert(c == 34.5);
}
@safe pure unittest
{
import std.format.read;
string item;
double amount;
assert("orange: (12%) 15.25".formattedRead("%s: (%*d%%) %f", item, amount) == 2);
assert(item == "orange");
assert(amount == 15.25);
// can also be used with tuples
import std.typecons : Tuple;
Tuple!(int, float) t;
char[] line = "1 7643 2.125".dup;
formattedRead(line, "%s %*u %s", t);
assert(t[0] == 1 && t[1] == 2.125);
}
@safe pure unittest
{
import std.format.read;
import std.exception : assertThrown;
import std.format : FormatException;
import std.typecons : tuple;
auto complete = "hello!34.5:124".formattedRead!(string, double, int)("%s!%s:%s");
assert(complete == tuple("hello", 34.5, 124));
// reading ends early
assertThrown!FormatException("hello!34.5:".formattedRead!(string, double, int)("%s!%s:%s"));
}
@safe pure unittest
{
import std.format.read;
import std.format : FormatException;
import std.typecons : tuple;
auto result = "orange: (12%) 15.25".formattedRead!(string, double)("%s: (%*d%%) %f");
assert(result == tuple("orange", 15.25));
}
@safe pure unittest
{
import std.format.read;
import std.exception : assertThrown;
import std.format : FormatException;
import std.typecons : tuple;
auto expected = tuple("hello", 124, 34.5);
auto result = "hello!124:34.5".formattedRead!("%s!%s:%s", string, int, double);
assert(result == expected);
assertThrown!FormatException("hello!34.5:".formattedRead!("%s!%s:%s", string, double, int));
}
@safe pure unittest
{
import std.format.read;
import std.format : FormatException;
import std.typecons : tuple;
static assert(!__traits(compiles, "orange: (12%) 15.25".formattedRead!("%s: (%*d%%) %f", string, double)));
}
@safe pure unittest
{
import std.format.read;
import std.format.spec : singleSpec;
string s = "42";
auto spec = singleSpec("%s");
assert(unformatValue!int(s, spec) == 42);
}
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