v.eval: support unsafe expr (#16224)

vlib/v/eval/expr.v

@@ -526,12 +526,15 @@ pub fn (mut e Eval) expr(expr ast.Expr, expecting ast.Type) Object {
 
 			return res
 		}
+		ast.UnsafeExpr {
+			return e.expr(expr.expr, expecting)
+		}
 		ast.AnonFn, ast.ArrayDecompose, ast.AsCast, ast.Assoc, ast.AtExpr, ast.CTempVar,
 		ast.ChanInit, ast.Comment, ast.ComptimeCall, ast.ComptimeSelector, ast.ComptimeType,
 		ast.ConcatExpr, ast.DumpExpr, ast.EmptyExpr, ast.EnumVal, ast.GoExpr, ast.IfGuardExpr,
 		ast.IndexExpr, ast.IsRefType, ast.Likely, ast.LockExpr, ast.MapInit, ast.MatchExpr,
 		ast.Nil, ast.NodeError, ast.None, ast.OffsetOf, ast.OrExpr, ast.RangeExpr, ast.SelectExpr,
-		ast.SqlExpr, ast.TypeNode, ast.TypeOf, ast.UnsafeExpr {
+		ast.SqlExpr, ast.TypeNode, ast.TypeOf {
 			e.error('unhandled expression ${typeof(expr).name}')
 		}
 	}

vlib/v/eval/testdata/unsafe_expr.out

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

vlib/v/eval/testdata/unsafe_expr.vv

@@ -0,0 +1,3 @@
+unsafe {
+    println(true)
+}