[vala/staging] genie: Fix parser's inner state when a struct is declared after a class

[Rico Tzschichholz <ricotz src gnome org>]

commit 1384dd0bac5a93721e1ca11efed51fba4cb050ed
Author: Jeremy Philippe <jeremy philippe gmail com>
Date:   Sat Dec 21 20:55:53 2019 +0100

    genie: Fix parser's inner state when a struct is declared after a class
    
    If the struct is declared after a class and has a default creation
    method, the parser will raise a "missing return type in method ..."
    error.
    
    The cause of the bug is that the global 'class_name' variable is not
    updated when the parser encounters a struct, so the previous value
    is used, and if a class has been parsed before, this value will be the
    name of the class instead of the struct.

 tests/Makefile.am                 |  1 +
 tests/genie/struct-after-class.gs | 13 +++++++++++++
 vala/valagenieparser.vala         |  2 ++
 3 files changed, 16 insertions(+)
---
diff --git a/tests/Makefile.am b/tests/Makefile.am
index 8be08ce07..ebeeed0ef 100644
--- a/tests/Makefile.am
+++ b/tests/Makefile.am
@@ -924,6 +924,7 @@ GENIE_TESTS = \
        genie/preparser-not.gs \
        genie/preparser-or-expression.gs \
        genie/struct.gs \
+       genie/struct-after-class.gs \
        $(NULL)
 
 check-TESTS: $(TESTS) $(NON_NULL_TESTS)
diff --git a/tests/genie/struct-after-class.gs b/tests/genie/struct-after-class.gs
new file mode 100644
index 000000000..353012bc3
--- /dev/null
+++ b/tests/genie/struct-after-class.gs
@@ -0,0 +1,13 @@
+init
+       var a = new TestClass()
+       var b = TestStruct()
+       assert( a.empty == b.empty )
+
+class TestClass
+       empty:string = ""
+
+struct TestStruct
+       empty:string
+
+       construct()
+               empty = ""
diff --git a/vala/valagenieparser.vala b/vala/valagenieparser.vala
index 668c40428..6e6e9cd5c 100644
--- a/vala/valagenieparser.vala
+++ b/vala/valagenieparser.vala
@@ -3290,6 +3290,8 @@ public class Vala.Genie.Parser : CodeVisitor {
 
                expect (TokenType.EOL);
 
+               class_name = st.name;
+
                parse_declarations (st);
 
                Symbol result = st;