feat: initial and partial support of composite expressions (#9)

A new `Composite` token is created. Literal composite expressions
are recognized and partially handled by the parser but not yet
by the code generator.

Other cosmetic changes are present.

1 files changed, 8 insertions, 0 deletions

diff --git a/parser/interpreter_test.go b/parser/interpreter_test.go
index a459359..a6ad246 100644
--- a/parser/interpreter_test.go
+++ b/parser/interpreter_test.go
@@ -255,3 +255,11 @@ func TestImport(t *testing.T) {
 		{src: `import . "fmt"; Println(4)`, res: "<nil>"},
 	})
 }
+
+func TestComposite(t *testing.T) {
+	run(t, []etest{
+		{src: "type T struct{}; t := T{}; t", res: "{}"},
+		{src: "t := struct{}{}; t", res: "{}"},
+		//		{src: "type T struct{N int}; t := T{2}; t", res: "{2}"},
+	})
+}