fix: struct types (#16)

Fixes #13

.github/workflows/ci.yaml

@@ -40,7 +40,7 @@ jobs:
           - nerves-hub/nerves_hub_web
           - nerves-hub/nerves_hub_link
           - mishka-group/mishka_developer_tools
-          # - absinthe-graphql/absinthe
+          - absinthe-graphql/absinthe
           - elixir-wallaby/wallaby
           - livebook-dev/livebook
           - livebook-dev/kino

lib/spitfire.ex

@@ -1352,6 +1352,9 @@ defmodule Spitfire do
   defp parse_struct_type(parser) do
     # structs can only have certain expressions to denote the type,
     # so we special case them here rather than parse an arbitrary expression
+
+    {associativity, precedence} = @lowest
+
     prefix =
       case current_token_type(parser) do
         :identifier -> &parse_lone_identifier/1
@@ -1379,7 +1382,43 @@ defmodule Spitfire do
 
       {{:__error__, meta, ["unknown token: #{ctype}"]}, parser}
     else
-      prefix.(parser)
+      {left, parser} = prefix.(parser)
+
+      calc_prec = fn parser ->
+        {_associativity, power} = peek_precedence(parser)
+
+        precedence =
+          case associativity do
+            :left -> precedence
+            :right -> precedence - 1
+          end
+
+        precedence < power
+      end
+
+      terminals = [:eol, :eof, :"}", :")", :"]", :">>"]
+
+      {parser, is_valid} = validate_peek(parser, current_token_type(parser))
+
+      if is_valid do
+        while peek_token(parser) not in terminals && calc_prec.(parser) <- {left, parser} do
+          infix =
+            case peek_token_type(parser) do
+              :. -> &parse_dot_expression/2
+              _ -> nil
+            end
+
+          case infix do
+            nil ->
+              {left, parser}
+
+            _ ->
+              infix.(next_token(parser), left)
+          end
+        end
+      else
+        {left, parser}
+      end
     end
   end
 
@@ -2304,6 +2343,10 @@ defmodule Spitfire do
     true
   end
 
+  defp valid_peek?(:")", :"{") do
+    true
+  end
+
   defp valid_peek?(:"}", ptype) do
     ptype in (@operators ++ [:"[", :";", :eol, :eof, :",", :")", :do, :., :"}", :"]", :">>", :end])
   end

test/spitfire_test.exs

@@ -645,7 +645,14 @@ defmodule SpitfireTest do
           b: b,
         }
         ''',
-        "%^resource{}"
+        "%^resource{}",
+        ~S'%__MODULE__.Foo{bar: "foo"}',
+        ~S'%Bar.__MODULE__.Foo{bar: "foo"}',
+        ~S'''
+        %Bar.__MODULE__.Foo{
+          bar: "foo"
+        }
+        '''
       ]
 
       for code <- codes do
@@ -1760,7 +1767,8 @@ defmodule SpitfireTest do
       codes = [
         "__MODULE__",
         "__MODULE__.foo()",
-        "__MODULE__.Foo"
+        "__MODULE__.Foo",
+        "Foo.__MODULE__.Bar"
       ]
 
       for code <- codes do