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, 3 insertions, 1 deletions

diff --git a/src/compiler/expr.zc b/src/compiler/expr.zc
index c6d29c6..40de6ef 100644
--- a/src/compiler/expr.zc
+++ b/src/compiler/expr.zc
@@ -1014,7 +1014,9 @@ int primary() {
 		return C_PLAIN;
 	}
 	s = source_lookup(n);
-	if (mstruct && !ginst) { ms = lookup(methname(mstruct, n)); if (ms >= 0 && skind[ms] == K_CONST) s = ms; }
+	// in a method of a struct a bare name is that struct's own constant or static function first, so it
+	// wins over a global (a top-level function or constant) of the same name
+	if (mstruct && !ginst) { ms = lookup(methname(mstruct, n)); if (ms >= 0 && (skind[ms] == K_CONST || (skind[ms] == K_FN && (sflag[ms] & F_STATIC)))) s = ms; }
 	if (s < 0 && rt.eq_w(n, "new")) s = source_lookup(s_new);
 	if (s >= 0) rs_put(toff, RS_SYM, rs_sym(s), s);
 	if (s >= 0 && skind[s] == K_KW) {