compiler: multiple returns - add test & fix use with array/map

compiler/fn.v

@@ -293,7 +293,7 @@ fn (p mut Parser) fn_decl() {
 				name: typ,
 				mod: p.mod
 			})
-			for i, t in typ.replace('MultiReturn_', '').replace('0ptr0', '*').split('_') {
+			for i, t in typ.replace('MultiReturn_', '').replace('_ZptrZ_', '*').split('_Z_') {
 				p.table.add_field(typ, 'var_$i', t, false, '', .public)
 			}
 			p.cgen.typedefs << 'typedef struct $typ $typ;'

compiler/parser.v

@@ -835,14 +835,12 @@ fn (p mut Parser) get_type() string {
 	mut typ := ''
 	// multiple returns
 	if p.tok == .lpar {
-		// if p.inside_tuple {
-		// 	p.error('unexpected (') 
-		// } 
+		// if p.inside_tuple {p.error('unexpected (')}
 		// p.inside_tuple = true 
 		p.check(.lpar) 
 		mut types := []string 
 		for {
-			types << p.get_type() 
+			types << p.get_type()
 			if p.tok != .comma {
 				break 
 			} 
@@ -850,7 +848,7 @@ fn (p mut Parser) get_type() string {
 		}
 		p.check(.rpar) 
 		// p.inside_tuple = false 
-		return 'MultiReturn_' + types.join('_').replace('*', '0ptr0')
+		return 'MultiReturn_' + types.join('_Z_').replace('*', '_ZptrZ_')
 	}
 	// fn type
 	if p.tok == .func {
@@ -1361,7 +1359,7 @@ fn (p mut Parser) var_decl() {
 	// multiple returns
 	if names.len > 1 {
 		// should we register __ret var?
-		types = t.replace('MultiReturn_', '').replace('0ptr0', '*').split('_')
+		types = t.replace('MultiReturn_', '').replace('_ZptrZ_', '*').split('_Z_')
 	}
 	for i, name in names {
 		typ := types[i]
@@ -3588,7 +3586,7 @@ fn (p mut Parser) return_st() {
 			}
 			// multiple returns
 			if types.len > 1 {
-				expr_type = 'MultiReturn_' + types.join('_').replace('*', '0ptr0')
+				expr_type = 'MultiReturn_' + types.join('_Z_').replace('*', '_ZptrZ_')
 				ret_vals := p.cgen.cur_line.right(ph)
 				mut ret_fields := ''
 				for ret_val_idx, ret_val in ret_vals.split(' ') {

compiler/tests/fn_multiple_returns_test.v

@@ -0,0 +1,19 @@
+struct UserData {
+	test string
+}
+
+fn test_fn_multiple_returns() {
+	name, age, groups, data := fn_mr_get_user()
+	assert name == 'joe'
+	assert age == 34
+	assert groups[0] == 'admins' 
+	assert groups[1] == 'users'
+	assert data.test == 'Test Data'
+	println('name: $name | age: $age | groups: ' + groups.join(',') + ' | data: $data.test')
+}
+
+fn fn_mr_get_user() (string, int, []string, UserData) {
+	groups := ['admins', 'users']
+	data := UserData{test: 'Test Data'}
+	return 'joe',34,groups,data
+}