Simplify parser.

Use 'if let' instead of 'match' where it makes sense. Use EBNF notation for the grammar rules. This simplifies repetition a lot.
2016-04-28 08:06:30 -07:00
parent f1a4b28d3f
commit 8d0311b642
2 changed files with 41 additions and 56 deletions
--- a/docs/langref.rst
+++ b/docs/langref.rst
@@ -413,11 +413,9 @@ calling convention:

 .. productionlist::
    signature : "(" [arglist] ")" ["->" retlist] [call_conv]
-    arglist   : arg
-              : arglist "," arg
+    arglist   : arg { "," arg }
    retlist   : arglist
-    arg       : type
-              : arg flag
+    arg       : type { flag }
    flag      : "uext" | "sext" | "inreg"
    callconv  : `string`