allison avatar allison committed ce8e5a9

Throw an exception on unsuccessful match, for compatibility with
HLLCompiler.

Comments (0)

Files changed (1)

     .param pmc source 
     .param pmc adverbs         :slurpy :named 
     $P0 = new ['Spix';'PEG';'Parser']
-    .tailcall $P0.'parse'(source, adverbs :flat :named) 
+    $P1 = $P0.'parse'(source, adverbs :flat :named) 
+    if null $P1 goto err_unmatched
+    .return($P1)
+  err_unmatched:
+    $P2 = new ['Exception']
+    $P2 = "Unable to parse source file"
+    throw $P2
 .end
 
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