fix std hover, full capture terminator, bare static calls, void main in run-only images

- hover: a symbol from an embedded library source (tinyvm:std.zc, tinyvm:icon.zc) was
  looked up only in the document; look it up by its qualified name in the library source
  (hover_embedded_sym), and render a method found that way by its line (bs_hover).
- std.capture: allocate one word more than the 256 it holds, so end() terminates inside the buffer.
- a bare call to a static function of the enclosing struct resolves like a bare struct constant
  (mstruct is set for every non-generic struct's methods); the struct's own wins over a global.
- run.zc declares main untyped (fn main();), so a run-only image accepts int, void or untyped main
  with both compilers.

1 files changed, 31 insertions, 0 deletions

diff --git a/tests/programs/struct_static_call.zc b/tests/programs/struct_static_call.zc
new file mode 100644
index 0000000..73fc0fc
--- /dev/null
+++ b/tests/programs/struct_static_call.zc
@@ -0,0 +1,31 @@
+namespace;
+include rt;
+
+// a static function of a struct can be called by its bare name inside the struct's
+// methods and static functions, as a struct constant can. the struct's own function
+// wins over a top-level one of the same name; outside the struct only S.name reaches it.
+int lim() { return 100; }
+int base() { return 7; }
+
+struct S {
+	int v;
+	static int lim() { return 3; }
+	static int twice(int x) { return x * 2; }
+	static int both() { return lim() + twice(4); }
+	int get() { return lim() + this.v; }
+	int scaled() { return twice(this.v) + later(); }
+	int top() { return base(); }
+	static int later() { return 1000; }
+}
+
+int main() {
+	S s;
+	s.v = 5;
+	rt.put_n(S.lim()); rt.put_c(32);	// 3
+	rt.put_n(lim()); rt.put_c(32);		// 100, the global one
+	rt.put_n(S.both()); rt.put_c(32);	// 3 + 8
+	rt.put_n(s.get()); rt.put_c(32);	// 3 + 5
+	rt.put_n(s.scaled()); rt.put_c(32);	// 10 + 1000, a static function declared later
+	rt.put_n(s.top()); rt.put_c(10);	// 7, a global that the struct has no member of
+	return 0;
+}