src/awesomewmdtl/ast.tl

@@ -55,6 +55,14 @@ local basic_nodes <total>: { Node.Token : function(name: string, ...: any): Node
          return_types = {},
       }
    end,
+   type = function(name: string, types: { string }, global: boolean): Node
+      return {
+         token = "type",
+         global = global,
+         name = name,
+         types = types,
+      }
+   end
 }
 
 local function create_node(token: Node.Token, name: string, ...: any): Node

src/awesomewmdtl/init.tl

@@ -148,6 +148,11 @@ for _, node in dag.iter_global_nodes(module_dag) do
    table.insert(global_nodes_by_record_kind[record_kind], node)
 end
 local global_module_ast <const> = ast.create_node("module", "global_env_def", "global_env_def", true)
+-- Declare global types
+table.insert(global_module_ast.children, ast.create_node("type", "Color", { "any" }, true))
+table.insert(global_module_ast.children, ast.create_node("type", "Surface", { "any" }, true))
+table.insert(global_module_ast.children, ast.create_node("type", "Cairo_Context", { "any" }, true))
+table.insert(global_module_ast.children, ast.create_node("type", "Image", { "any" }, true))
 for record_kind, nodes in pairs(global_nodes_by_record_kind) do
    local record_kind_node = ast.create_node("record", record_kind, true)
    for _, node in ipairs(nodes) do

src/awesomewmdtl/printer/teal_type_definition.tl

@@ -6,11 +6,14 @@ local utils = require("awesomewmdtl.utils")
 
 local log = logger.log("scraper")
 
-local function render_types(types: { string }): string
+local function render_types(types: { string }, no_colon: boolean): string
    if not types or #types == 0 then
       return ""
    end
-   return ": " .. table.concat(types, " | ")
+   return string.format(
+      "%s%s",
+      no_colon and "" or ": ",
+      table.concat(types, " | "))
 end
 
 local function dedent(str: string): string
@@ -142,7 +145,18 @@ local node_printer <total>: { Node.Token : Node_Printer_Function } = {
       on_node = function(): string, integer
          log:warn("Metamethods are not supported yet")
       end,
-   }
+   },
+   ["type"] = {
+      on_node = function(node: Node, indent_level: integer): string, integer
+         return render_code(
+            string.format(
+               "%stype %s = %s",
+               node.global and "\nglobal " or "",
+               node.name,
+               render_types(node.types, true)),
+            indent_level), indent_level
+      end,
+   },
 }
 
 function print_teal(node: Node, indent_level: integer | nil): string

src/awesomewmdtl/types/Node.tl

@@ -7,6 +7,7 @@ local record Node
       "variable"
       "function"
       "metamethod"
+      "type"
    end
    token: Token
    name: string
@@ -14,7 +15,7 @@ local record Node
    -- for "module", "record", "enum"
    children: { Node }
 
-   -- for "variable"
+   -- for "variable" and "type"
    types: { string }
 
    -- for "function" and "metamethod"
@@ -25,7 +26,7 @@ local record Node
    module_path: string
    dependencies: { string : string } -- module_name -> module_path
 
-   -- for "module" and "record"
+   -- for "module", "record", "type"
    global: boolean
 end