From 6572d597f976b5c4b0dc766c47a50a40b6475548 Mon Sep 17 00:00:00 2001
From: Delyan Angelov <delian66@gmail.com>
Date: Thu, 2 Feb 2023 10:49:15 +0200
Subject: [PATCH] Revert "cgen: fix sumtype as cast with calling twice (fix
 #17156) (#17183)"

This reverts commit 90ae3c82c97b507534840db8781571be706f910d.
---
 cmd/tools/vtest-self.v              |  1 -
 vlib/v/gen/c/cgen.v                 | 72 +++++++----------------------
 vlib/v/tests/sumtype_as_cast_test.v | 18 --------
 3 files changed, 16 insertions(+), 75 deletions(-)
 delete mode 100644 vlib/v/tests/sumtype_as_cast_test.v

diff --git a/cmd/tools/vtest-self.v b/cmd/tools/vtest-self.v
index 7d00689650..b4c680837f 100644
--- a/cmd/tools/vtest-self.v
+++ b/cmd/tools/vtest-self.v
@@ -230,7 +230,6 @@ const (
 		'do_not_remove',
 		'vlib/v/tests/const_fixed_array_containing_references_to_itself_test.v', // error C2099: initializer is not a constant
 		'vlib/v/tests/const_and_global_with_same_name_test.v', // error C2099: initializer is not a constant
-		'vlib/v/tests/sumtype_as_cast_test.v', // error: Compound statement expression cannot support
 	]
 	skip_on_windows               = [
 		'do_not_remove',
diff --git a/vlib/v/gen/c/cgen.v b/vlib/v/gen/c/cgen.v
index 4e877ae5d0..ed1dcb59cb 100644
--- a/vlib/v/gen/c/cgen.v
+++ b/vlib/v/gen/c/cgen.v
@@ -6088,63 +6088,23 @@ fn (mut g Gen) as_cast(node ast.AsCast) {
 	mut expr_type_sym := g.table.sym(g.unwrap_generic(node.expr_type))
 	if mut expr_type_sym.info is ast.SumType {
 		dot := if node.expr_type.is_ptr() { '->' } else { '.' }
-		$if !msvc {
-			if node.expr is ast.CallExpr {
-				tmp_var := g.new_tmp_var()
-				expr_styp := g.typ(node.expr_type)
-				g.write('({ ${expr_styp} ${tmp_var} = ')
-				g.expr(node.expr)
-				g.write('; ')
-				if sym.info is ast.FnType {
-					g.write('/* as */ (${styp})__as_cast(')
-				} else {
-					g.write('/* as */ *(${styp}*)__as_cast(')
-				}
-				g.write(tmp_var)
-				g.write(dot)
-				g.write('_${sym.cname},')
-				g.write(tmp_var)
-				g.write(dot)
-				sidx := g.type_sidx(unwrapped_node_typ)
-				g.write('_typ, ${sidx}); }) /*expected idx: ${sidx}, name: ${sym.name} */ ')
-			} else {
-				if sym.info is ast.FnType {
-					g.write('/* as */ (${styp})__as_cast(')
-				} else {
-					g.write('/* as */ *(${styp}*)__as_cast(')
-				}
-				g.write('(')
-				g.expr(node.expr)
-				g.write(')')
-				g.write(dot)
-				g.write('_${sym.cname},')
-				g.write('(')
-				g.expr(node.expr)
-				g.write(')')
-				g.write(dot)
-				// g.write('typ, /*expected:*/$node.typ)')
-				sidx := g.type_sidx(unwrapped_node_typ)
-				g.write('_typ, ${sidx}) /*expected idx: ${sidx}, name: ${sym.name} */ ')
-			}
-		} $else {
-			if sym.info is ast.FnType {
-				g.write('/* as */ (${styp})__as_cast(')
-			} else {
-				g.write('/* as */ *(${styp}*)__as_cast(')
-			}
-			g.write('(')
-			g.expr(node.expr)
-			g.write(')')
-			g.write(dot)
-			g.write('_${sym.cname},')
-			g.write('(')
-			g.expr(node.expr)
-			g.write(')')
-			g.write(dot)
-			// g.write('typ, /*expected:*/$node.typ)')
-			sidx := g.type_sidx(unwrapped_node_typ)
-			g.write('_typ, ${sidx}) /*expected idx: ${sidx}, name: ${sym.name} */ ')
+		if sym.info is ast.FnType {
+			g.write('/* as */ (${styp})__as_cast(')
+		} else {
+			g.write('/* as */ *(${styp}*)__as_cast(')
 		}
+		g.write('(')
+		g.expr(node.expr)
+		g.write(')')
+		g.write(dot)
+		g.write('_${sym.cname},')
+		g.write('(')
+		g.expr(node.expr)
+		g.write(')')
+		g.write(dot)
+		// g.write('typ, /*expected:*/$node.typ)')
+		sidx := g.type_sidx(unwrapped_node_typ)
+		g.write('_typ, ${sidx}) /*expected idx: ${sidx}, name: ${sym.name} */ ')
 
 		// fill as cast name table
 		for variant in expr_type_sym.info.variants {
diff --git a/vlib/v/tests/sumtype_as_cast_test.v b/vlib/v/tests/sumtype_as_cast_test.v
deleted file mode 100644
index a0a7569111..0000000000
--- a/vlib/v/tests/sumtype_as_cast_test.v
+++ /dev/null
@@ -1,18 +0,0 @@
-type Sum = int | string
-
-struct Count {
-mut:
-	count int
-}
-
-fn (mut c Count) ret_sum() Sum {
-	c.count++
-	return c.count
-}
-
-fn test_sumtype_as_cast() {
-	mut cnt := Count{22}
-	_ := cnt.ret_sum() as int
-	println(cnt)
-	assert cnt.count == 23
-}