reflect: implement ArrayOf
This change exposes reflect.ArrayOf to create new reflect.Type array
types at runtime, when given a reflect.Type element.
- reflect: implement ArrayOf
- reflect: tests for ArrayOf
- runtime: document that typeAlg is used by reflect and must be kept in
synchronized
Fixes #5996.
Change-Id: I5d07213364ca915c25612deea390507c19461758
Reviewed-on: https://go-review.googlesource.com/4111
Reviewed-by: Keith Randall <khr@golang.org>
diff --git a/src/reflect/value.go b/src/reflect/value.go
index 0b22efb..1ea2608 100644
--- a/src/reflect/value.go
+++ b/src/reflect/value.go
@@ -1767,6 +1767,12 @@
}
}
+// arrayAt returns the i-th element of p, a C-array whose elements are
+// eltSize wide (in bytes).
+func arrayAt(p unsafe.Pointer, i int, eltSize uintptr) unsafe.Pointer {
+ return unsafe.Pointer(uintptr(p) + uintptr(i)*eltSize)
+}
+
// grow grows the slice s so that it can hold extra more values, allocating
// more capacity if needed. It also returns the old and new slice lengths.
func grow(s Value, extra int) (Value, int, int) {
