grammar for the grammar and lexing and parsing of a new language lbp

1 files changed, 42 insertions, 0 deletions

diff --git a/demos/sample-files/gram.g b/demos/sample-files/gram.g
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+-terminal
+  TERMINAL NONTERM LEFT RIGHT COLON NOPREC
+  PIPE SEMICOL DOT
+  IDEN NUM ACTION;
+-nonterminal
+  S A B C
+  Type Prec Prod Preclist Prodlist
+  Actionlist Idenlist IorNlist.
+
+-noprec.
+
+S: A B C {};
+
+A: TERMINAL Idenlist SEMICOL NONTERM Idenlist DOT { handle_type(A(1), A(4)) };
+
+
+B: Preclist { handle_prec(A(0)); }
+ | NOPREC DOT { handle_prec(NULL); };
+
+Preclist: Prec SEMICOL Preclist { v = list_new_head(A(2), A(0)); }
+        | Prec DOT              { v = A(0); };
+
+Prec: LEFT  IorNlist { v = prec_new(A(1), PRECEDENCE_LEFT_ASSOC); }
+    | RIGHT IorNlist { v = prec_new(A(1), PRECEDENCE_RIGHT_ASSOC); };
+
+
+C: Prodlist { handle_prod(A(0)); };
+
+Prodlist: Prod SEMICOL Prodlist { v = list_new_head(A(2), A(0)); }
+        | Prod DOT              { v = A(0); };
+
+Prod: IDEN COLON Actionlist     { v = prod_new(A(0), A(2)); };
+
+Actionlist: Idenlist ACTION PIPE Actionlist { v = list_new_head(A(3), action_new(A(0), A(1))); }
+          | Idenlist ACTION                 { v = action_new(A(0), A(1)); };
+
+Idenlist: IDEN Idenlist { v = list_new_head(A(1), ptr_new(A(0))); }
+        | IDEN          { v = ptr_new(A(0)); };
+IorNlist: IDEN IorNlist { v = list_new_head(A(1), ptr_new(A(0))); }
+        | IDEN          { v = ptr_new(A(0)); }
+        | NUM IorNlist  { v = list_new_head(A(1), num_new(A(0))); }
+        | NUM           { v = num_new(A(0)); }.