Better identifier parsing

  * '(<|>)' and '`elem`' now get parsed and rendered properly as links
  * 'DbModule'/'DbUnitId' now properly get split apart into two links
  * tuple names now get parsed properly
  * some more small niceties...

The identifier parsing code is more precise and more efficient (although to be
fair: it is also longer and in its own module). On the rendering side, we need
to pipe through information about backticks/parens/neither all the way through
from renaming to the backends.

In terms of impact: a total of 35 modules in the entirety of the bootlib + ghc
lib docs change. The only "regression" is things like '\0'. These should be
changed to @\\0@ (the path by which this previously worked seems accidental).

1 files changed, 35 insertions, 0 deletions

diff --git a/html-test/src/Identifiers.hs b/html-test/src/Identifiers.hs
new file mode 100644
index 00000000..75f12109
--- /dev/null
+++ b/html-test/src/Identifiers.hs
@@ -0,0 +1,35 @@
+{-# LANGUAGE TypeOperators #-}
+module Identifiers where
+
+import Data.List (elem, (++))
+
+data Id = Id
+data a :* b = a :* b
+
+{-|
+
+  * Unadorned:
+
+        - Unqualified: '++', 'elem'
+        - Qualified: 'Data.List.++', 'Data.Lis.elem'
+        - Namespaced: v'++', t'++', v'elem', t'elem', v'Id', t'Id', v':*', t':*'
+
+  * Parenthesized:
+
+        - Unqualified: @'(++)' [1,2,3] [4,5,6]@
+        - Qualified: @'(Data.List.++)' [1,2,3] [4,5,6]@
+        - Namespaced: v'(++)', t'++', v'(:*)', t'(:*)'
+
+  * Backticked:
+
+        - Unqualified: @1 '`elem`' [-3..3]@
+        - Qualified: @1 '`Data.List.elem`' [-3..3]@
+        - Namespaced: v'`elem`', t'`elem`', v'`Id`', t'`Id`'
+
+  * Edge cases:
+
+        - Tuples: '()', '(,,,)'
+
+-}
+foo :: ()
+foo = ()