isInputRangeErrorFormatter

struct Foo {}
enum msg = isInputRangeErrorFormatter!(Foo);
enum exp =`Foo is not an InputRange because:
the property 'empty' does not exist
and the property 'front' does not exist
and the function 'popFront' does not exist`;
static assert(msg == exp, msg ~ "\n" ~ exp);
string msg2 = isInputRangeErrorFormatter!(Foo);
assert(msg2 == exp, msg ~ "\n" ~ exp);

struct Foo {
	int empty;
}
enum msg = isInputRangeErrorFormatter!(Foo);
enum exp =`Foo is not an InputRange because:
the property 'empty' is not of type 'bool' but 'int'
and the property 'front' does not exist
and the function 'popFront' does not exist`;
static assert(msg == exp, msg ~ "\n" ~ exp);
string msg2 = isInputRangeErrorFormatter!(Foo);
assert(msg2 == exp, msg ~ "\n" ~ exp);

struct Foo {
	bool empty;
	void front();
}
enum msg = isInputRangeErrorFormatter!(Foo);
enum exp =`Foo is not an InputRange because:
the property 'front' does not return a non 'void' value
and the function 'popFront' does not exist`;
static assert(msg == exp, msg ~ "\n" ~ exp);
string msg2 = isInputRangeErrorFormatter!(Foo);
assert(msg2 == exp, msg ~ "\n" ~ exp);

struct Foo {
	bool empty;
	int front();
}
enum msg = isInputRangeErrorFormatter!(Foo);
enum exp =`Foo is not an InputRange because:
the function 'popFront' does not exist`;
static assert(msg == exp, msg ~ "\n" ~ exp);
string msg2 = isInputRangeErrorFormatter!(Foo);
assert(msg2 == exp, msg ~ "\n" ~ exp);

struct Foo {
	bool empty;
	int front();
	void popFront();
}
enum msg = isInputRangeErrorFormatter!(Foo);
enum exp =`Foo is an InputRange`;
static assert(msg == exp, msg ~ "\n" ~ exp);
string msg2 = isInputRangeErrorFormatter!(Foo);
assert(msg2 == exp, msg ~ "\n" ~ exp);