Implement usage generation

Also migrate the CLI compiler usage handling to the auto-generated version.

1 files changed, 14 insertions, 0 deletions

diff --git a/cli/context.hxx b/cli/context.hxx
index 1f2facb..194c008 100644
--- a/cli/context.hxx
+++ b/cli/context.hxx
@@ -20,6 +20,8 @@
 
 using std::endl;
 
+class generation_failed {};
+
 class context
 {
 public:
@@ -36,6 +38,8 @@ public:
   semantics::cli_unit& unit;
   options_type const& options;
 
+  bool usage;
+
   string const& inl;
   string const& opt_prefix;
   string const& opt_sep;
@@ -59,6 +63,16 @@ public:
   string
   escape (string const&) const;
 
+  // Format the documentation string.
+  //
+  enum output_type
+  {
+    ot_plain
+  };
+
+  static string
+  format (string const&, output_type);
+
 public:
   static string const&
   ename (semantics::nameable& n)