lib: Use Mu:Error exception

Where applicable.

lib/parser/parser.cc

@@ -19,6 +19,7 @@
 #include "parser.hh"
 #include "tokenizer.hh"
 #include "utils/mu-utils.hh"
+#include "utils/mu-error.hh"
 
 using namespace Mu;
 
@@ -36,7 +37,7 @@ using namespace Mu;
 // <regex>      ->      [field:]/regex/
 
 
-#define BUG(...) std::runtime_error (format("%u: BUG: ",__LINE__)	\
+#define BUG(...) Mu::Error (Error::Code::Internal, format("%u: BUG: ",__LINE__)	\
 				     + format(__VA_ARGS__))
 
 static Token

lib/parser/tree.hh

@@ -25,6 +25,7 @@
 #include <iostream>
 
 #include <parser/data.hh>
+#include <utils/mu-error.hh>
 
 namespace Mu {
 
@@ -62,7 +63,7 @@ struct Node {
 		case Type::Range:    return "range"; break;
 		case Type::Invalid:  return "<invalid>"; break;
 		default:
-			throw std::runtime_error ("bug");
+			throw Mu::Error(Error::Code::Internal, "unexpected type");
 		}
 	}
 

lib/parser/xapian.cc

@@ -23,6 +23,7 @@
 
 #include <xapian.h>
 #include "parser/xapian.hh"
+#include <utils/mu-error.hh>
 
 using namespace Mu;
 
@@ -42,7 +43,7 @@ xapian_query_op (const Mu::Tree& tree)
 	case Node::Type::OpOr:  op    = Xapian::Query::OP_OR; break;
 	case Node::Type::OpXor: op    = Xapian::Query::OP_XOR; break;
 	case Node::Type::OpAndNot: op = Xapian::Query::OP_AND_NOT; break;
-	default: throw std::runtime_error ("invalid op");	// bug
+	default: throw Mu::Error (Error::Code::Internal, "invalid op");	// bug
 	}
 
 	std::vector<Xapian::Query> childvec;
@@ -114,6 +115,6 @@ Mu::xapian_query (const Mu::Tree& tree)
 	case Node::Type::Range:
 		return xapian_query_range (tree);
 	default:
-		throw std::runtime_error ("invalid query"); // bug
+                throw Mu::Error (Error::Code::Internal, "invalid query");	// bug
 	}
 }