- Better error messages when slicing a pointer to a slice or vector. #2681

test/test_suite/slices/slice_error_improvement.c3

@@ -0,0 +1,34 @@
+import std;
+
+
+macro transpose4x4_mat(a, b, c, d)
+{
+    Matrix4x4{float} mat;
+
+    mat.m[0..3] = *a[..]; // #error: Omitting the end index is not allowed for pointers, did you perhaps forget to dereference the pointer before slicing wih []?
+    mat.m[4..7] = *b[..];
+    mat.m[8..11] = *c[..];
+    mat.m[12..15] = *d[..];
+
+    mat = mat.transpose();
+
+    *a = mat.m[0..3];
+    *b = mat.m[4..7];
+    *c = mat.m[8..11];
+    *d = mat.m[12..15];
+}
+
+fn void main()
+{
+    float[<4>] a = { 0,1,2,3 };
+    float[<4>] b = { 4,5,6,7 };
+    float[<4>] c = { 8,9,10,11 };
+    float[<4>] d = { 12,13,14,15 };
+
+    transpose4x4_mat(&a, &b, &c, &d);
+
+    io::printn(a);
+    io::printn(b);
+    io::printn(c);
+    io::printn(d);
+}