add first bits of a (custom) config parser

parser-specs/config.spec

@@ -0,0 +1,60 @@
+# vim:ts=2:sw=2:expandtab
+#
+# i3 - an improved dynamic tiling window manager
+# © 2009-2012 Michael Stapelberg and contributors (see also: LICENSE)
+#
+# parser-specs/config.spec: Specification file for generate-command-parser.pl
+# which will generate the appropriate header files for our C parser.
+#
+# Use :source highlighting.vim in vim to get syntax highlighting
+# for this file.
+
+# TODO: get it to parse the default config :)
+# TODO: comment handling (on their own line, at the end of a line)
+
+state INITIAL:
+  # We have an end token here for all the commands which just call some
+  # function without using an explicit 'end' token.
+  end ->
+  #'[' -> call cmd_criteria_init(); CRITERIA
+  'font' -> FONT
+  'mode' -> MODENAME
+  exectype = 'exec_always', 'exec'
+      -> EXEC
+
+# <exec|exec_always> [--no-startup-id] command
+state EXEC:
+  no_startup_id = '--no-startup-id'
+      ->
+  command = string
+      -> call cfg_exec($exectype, $no_startup_id, $command)
+
+state MODENAME:
+  modename = word
+      -> call cfg_enter_mode($modename); MODEBRACE
+
+state MODEBRACE:
+  '{'
+      -> MODE
+
+state MODE:
+  bindtype = 'bindsym', 'bindcode'
+      -> MODE_BINDING
+  '}'
+      -> INITIAL
+
+state MODE_BINDING:
+  modifiers = 'Mod1', 'Mod2', 'Mod3', 'Mod4', 'Mod5', 'Shift', 'Control'
+      ->
+  '+'
+      ->
+  key = word
+      -> MODE_BINDCOMMAND
+
+state MODE_BINDCOMMAND:
+  command = string
+      -> call cfg_mode_binding($bindtype, $modifiers, $key, $command); MODE
+
+state FONT:
+  font = string
+      -> call cfg_font($font)