lang: inline for element form over packs — multi-iterable parity

examples/expected/0536-packs-pack-as-value.stderr

@@ -37,7 +37,7 @@ error: pack 'xs' has no runtime value — a pack is comptime-only and can't be u
 17 | iter    :: (..xs: Show) -> void { for xs  (x) { _ = x; } }  // D: runtime iterate
    |                                       ^^
 
-help: to iterate at comptime use `inline for 0..xs.len (i)`; for a runtime loop declare it as `..xs: []P` (a protocol slice) instead of a pack
+help: to iterate at comptime use `inline for xs (x)` (or `inline for 0..xs.len (i)` for the index); for a runtime loop declare it as `..xs: []P` (a protocol slice) instead of a pack
    |
 17 | iter    :: (..xs: Show) -> void { for xs  (x) { _ = x; } }  // D: runtime iterate
    |                                       ^^

examples/expected/0545-packs-inline-for-element.exit

@@ -0,0 +1 @@
+0

examples/expected/0545-packs-inline-for-element.stderr

@@ -0,0 +1 @@
+

examples/expected/0545-packs-inline-for-element.stdout

@@ -0,0 +1,11 @@
+bare: 7
+bare: hi
+0: 7
+1: hi
+r0: 1
+r1: two
+10 -> x
+11 -> y
+ran 3
+val: IntBox{v: 42}
+empty ok

examples/expected/1164-diagnostics-inline-for-pack-rejections.exit

@@ -0,0 +1 @@
+1

examples/expected/1164-diagnostics-inline-for-pack-rejections.stderr

@@ -0,0 +1,23 @@
+error: 'v' is not part of protocol 'Show' — a pack element exposes only the protocol's interface
+  --> examples/1164-diagnostics-inline-for-pack-rejections.sx:15:23
+   |
+15 |         print("{}\n", x.v);
+   |                       ^^^
+
+error: a pack element cannot be captured by reference
+  --> examples/1164-diagnostics-inline-for-pack-rejections.sx:19:21
+   |
+19 |     inline for xs (*x) { }
+   |                     ^
+
+error: inline for: pack 'xs' has 2 elements but the unroll is 5 iterations
+  --> examples/1164-diagnostics-inline-for-pack-rejections.sx:22:22
+   |
+22 |     inline for 0..5, xs (i, x) { }
+   |                      ^^
+
+error: inline for: each iterable must be a comptime range or a pack — `inline for 0..N (i) { }` / `inline for xs (x) { }`
+  --> examples/1164-diagnostics-inline-for-pack-rejections.sx:30:16
+   |
+30 |     inline for arr (x) { }
+   |                ^^^

examples/expected/1164-diagnostics-inline-for-pack-rejections.stdout

@@ -0,0 +1 @@
+