compiler/lang: add variadic function args support

compiler/table.v

@@ -20,9 +20,15 @@ mut:
 	cflags       []CFlag  // ['-framework Cocoa', '-lglfw3']
 	fn_cnt       int //atomic
 	obfuscate    bool
+	varg_access  []VargAccess
 	//names        []Name
 }
 
+struct VargAccess {
+	fn_name string
+	tok_idx int
+	index   int
+}
 
 /*
 enum NameCategory {
@@ -331,6 +337,10 @@ fn (t mut Table) register_fn(new_fn Fn) {
 
 fn (table &Table) known_type(typ_ string) bool {
 	mut typ := typ_
+	// vararg
+	if typ.starts_with('...') && typ.len > 3 {
+		typ = typ.right(3)
+	}
 	// 'byte*' => look up 'byte', but don't mess up fns
 	if typ.ends_with('*') && !typ.contains(' ') {
 		typ = typ.left(typ.len - 1)
@@ -558,6 +568,13 @@ fn (p mut Parser) _check_types(got_, expected_ string, throw bool) bool {
 	if p.pref.translated {
 		return true
 	}
+	// variadic
+	if expected.starts_with('...') {
+		expected = expected.right(3)
+	}
+	if got.starts_with('...') {
+		got = got.right(3)
+	}
 	// Allow ints to be used as floats
 	if got == 'int' && expected == 'f32' {
 		return true