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protect imported predicates from being overwritten (re: issue #28)

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Mark Thom
2018-04-23 15:55:53 -06:00
parent b87d599b14
commit a891b9327c
2 changed files with 3 additions and 5 deletions
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src/prolog/io.rs
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@@ -267,7 +267,7 @@ impl fmt::Display for EvalError {
&EvalError::ModuleDoesNotContainExport => write!(f, "module does not contain claimed export."),
&EvalError::QueryFailure => write!(f, "false."),
&EvalError::QueryFailureWithException(ref e) => write!(f, "{}", error_string(e)),
&EvalError::ImpermissibleEntry(ref msg) => write!(f, "cannot overwrite builtin {}.", msg),
&EvalError::ImpermissibleEntry(ref msg) => write!(f, "cannot overwrite {}.", msg),
&EvalError::OpIsInfixAndPostFix =>
write!(f, "cannot define an op to be both postfix and infix."),
&EvalError::NamelessEntry => write!(f, "the predicate head is not an atom or clause."),