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Better std.algorithm.iteration.filter error messages

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Robert burner Schadek 2023-02-15 22:01:03 +01:00
parent 2deea50438
commit 8546da5b04
2 changed files with 25 additions and 3 deletions
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20
std/algorithm/iteration.d
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@ -2969,10 +2969,24 @@ iterated from the back to the front, the separator will still be consumed from
front to back, even if it is a bidirectional range too.
*/
auto joiner(RoR, Separator)(RoR r, Separator sep)
if (isInputRange!RoR && isInputRange!(ElementType!RoR)
&& isForwardRange!Separator
&& is(ElementType!Separator : ElementType!(ElementType!RoR)))
{
static assert(isInputRange!RoR, "The type of RoR '", RoR.stringof
, " must be an InputRange (isInputRange!", RoR.stringof, ").");
static assert(isInputRange!(ElementType!RoR), "The ElementyType of RoR '"
, ElementType!(RoR).stringof, "' must be an InputRange "
, "(isInputRange!(ElementType!(", RoR.stringof , "))).");
static assert(isForwardRange!Separator, "The type of the Seperator '"
, Seperator.stringof, "' must be a ForwardRange (isForwardRange!("
, Seperator.stringof, ")).");
static assert(is(ElementType!Separator : ElementType!(ElementType!RoR))
, "The type of the elements of the separator range does not match "
, "the type of the elements that are joined. Separator type '"
, ElementType!(Separator).stringof, "' is not implicitly"
, "convertible to range element type '"
, ElementType!(ElementType!RoR).stringof, "' (is(ElementType!"
, Separator.stringof, " : ElementType!(ElementType!", RoR.stringof
, "))).");
static struct Result
{
private RoR _items;