From 04aae1e17ba336b01800345e5e62a00f21e09293 Mon Sep 17 00:00:00 2001
From: yuyi <yuyi98@163.com>
Date: Tue, 10 May 2022 19:03:18 +0800
Subject: [PATCH] cgen: fix error for printing aliases of multi fixed array
 (#14348)

---
 vlib/v/gen/c/assign.v                                      | 3 +++
 vlib/v/gen/c/cgen.v                                        | 3 +++
 .../tests/inout/printing_aliases_of_multi_fixed_array.out  | 2 ++
 .../v/tests/inout/printing_aliases_of_multi_fixed_array.vv | 7 +++++++
 4 files changed, 15 insertions(+)
 create mode 100644 vlib/v/tests/inout/printing_aliases_of_multi_fixed_array.out
 create mode 100644 vlib/v/tests/inout/printing_aliases_of_multi_fixed_array.vv

diff --git a/vlib/v/gen/c/assign.v b/vlib/v/gen/c/assign.v
index 990e89d75e..55056936f6 100644
--- a/vlib/v/gen/c/assign.v
+++ b/vlib/v/gen/c/assign.v
@@ -18,6 +18,9 @@ fn (mut g Gen) gen_assign_stmt(node_ ast.AssignStmt) {
 	mut return_type := ast.void_type
 	is_decl := node.op == .decl_assign
 	g.assign_op = node.op
+	defer {
+		g.assign_op = .unknown
+	}
 	op := if is_decl { token.Kind.assign } else { node.op }
 	right_expr := node.right[0]
 	match right_expr {
diff --git a/vlib/v/gen/c/cgen.v b/vlib/v/gen/c/cgen.v
index 1ecf33ad06..6b383ef573 100644
--- a/vlib/v/gen/c/cgen.v
+++ b/vlib/v/gen/c/cgen.v
@@ -3883,6 +3883,9 @@ fn (mut g Gen) cast_expr(node ast.CastExpr) {
 		g.expr(node.expr)
 		g.write('))')
 	} else if sym.kind == .alias && g.table.final_sym(node.typ).kind == .array_fixed {
+		if node.expr is ast.ArrayInit && g.assign_op != .decl_assign {
+			g.write('(${g.typ(node.expr.typ)})')
+		}
 		g.expr(node.expr)
 	} else if node.expr_type == ast.bool_type && node.typ.is_int() {
 		styp := g.typ(node.typ)
diff --git a/vlib/v/tests/inout/printing_aliases_of_multi_fixed_array.out b/vlib/v/tests/inout/printing_aliases_of_multi_fixed_array.out
new file mode 100644
index 0000000000..1e14fafeeb
--- /dev/null
+++ b/vlib/v/tests/inout/printing_aliases_of_multi_fixed_array.out
@@ -0,0 +1,2 @@
+Mat([[1, 2], [3, 4]])
+Mat([[1, 2], [3, 4]])
diff --git a/vlib/v/tests/inout/printing_aliases_of_multi_fixed_array.vv b/vlib/v/tests/inout/printing_aliases_of_multi_fixed_array.vv
new file mode 100644
index 0000000000..b0d11e76e5
--- /dev/null
+++ b/vlib/v/tests/inout/printing_aliases_of_multi_fixed_array.vv
@@ -0,0 +1,7 @@
+type Mat = [2][2]int
+
+fn main() {
+	a := Mat([[1, 2]!, [3, 4]!]!)
+	println(a)
+	println(Mat([[1, 2]!, [3, 4]!]!))
+}