src/lexer-{proto,impl}.lisp, src/pset-parse.lisp: Other C operators.

[sod] / src / lexer-proto.lisp

diff --git a/src/lexer-proto.lisp b/src/lexer-proto.lisp
index 22d61c0..a237a92 100644 (file)
--- a/src/lexer-proto.lisp
+++ b/src/lexer-proto.lisp
@@ -65,6 +65,14 @@
                              (:char "<character-literal>")
                              (:eof "<end-of-file>")
                              (:ellipsis "`...'")
+                             (:shl "`<<'")
+                             (:shr "`>>'")
+                             (:eq "`=='")
+                             (:ne "`!='")
+                             (:le "`<='")
+                             (:ge "`>='")
+                             (:and "`&&'")
+                             (:or "`||'")
                              (t (format nil "<? ~S~@[ ~S~]>" type value)))))
                      (show-expected (thing)
                        (acond ((gethash thing *indicator-map*) it)
@@ -112,6 +120,11 @@
                      &rest token-types)
   "Discard tokens until we find one listed in TOKEN-TYPES.
 
+   Each of the TOKEN-TYPES is an expression which evaluates to either a
+   two-item list (TYPE VALUE), or a singleton TYPE; the latter is equivalent
+   to a list (TYPE t).  Such a pair matches a token with the corresponding
+   TYPE and VALUE, except that a VALUE of `t' matches any token value.
+
    If KEEP-END is true then retain the found token for later; otherwise
    discard it.  KEEP-END defaults to true if multiple TOKEN-TYPES are given;
    otherwise false.  If end-of-file is encountered then the indicator list is
@@ -124,7 +137,7 @@
 (export 'error)
 (defparse error (:context (context token-scanner-context)
                 (&key ignore-unconsumed force-progress)
-                sub &optional (recover t))
+                sub &optional (recover t) &body body)
   "Try to parse SUB; if it fails then report an error, and parse RECOVER.
 
    This is the main way to recover from errors and continue parsing.  Even
@@ -143,7 +156,8 @@
                        (parser () ,sub)
                        (parser () ,recover)
                        :ignore-unconsumed ,ignore-unconsumed
-                       :force-progress ,force-progress))
+                       :force-progress ,force-progress
+                       :action ,(and body `(lambda () ,@body))))
 
 (export 'must)
 (defparse must (:context (context token-scanner-context)