util: Add Teal interface definition files Enables writing code in Teal that is aware of the interfaces and function prototypes in these other utils. Could also be used to do type checks on Lua sources, but this tends to have a lot of noise.

author: Kim Alvefur <zash@zash.se>
date: Tue, 09 Mar 2021 14:36:46 +0100
child: 12614:d498e7e7853a
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/teal-src/util/dataforms.d.tl	Tue Mar 09 14:36:46 2021 +0100
@@ -0,0 +1,52 @@
+local stanza_t = require "util.stanza".stanza_t
+
+local enum form_type
+	"form"
+	"submit"
+	"cancel"
+	"result"
+end
+
+local enum field_type
+	"boolean"
+	"fixed"
+	"hidden"
+	"jid-multi"
+	"jid-single"
+	"list-multi"
+	"list-single"
+	"text-multi"
+	"text-private"
+	"text-single"
+end
+
+local record form_field
+
+	type : field_type
+	var : string -- protocol name
+	name :  string -- internal name
+
+	label : string
+	desc : string
+
+	datatype : string
+	range_min : number
+	range_max : number
+
+	value : any -- depends on field_type
+	options : table
+end
+
+local record dataform
+	title : string
+	instructions : string
+	{ form_field } -- XXX https://github.com/teal-language/tl/pull/415
+
+	form : function ( dataform, table, form_type ) : stanza_t
+end
+
+local record lib
+	new : function ( dataform ) : dataform
+end
+
+return lib