From: Daniel Karbach <daniel.karbach@localhorst.tv>
Date: Sun, 26 Aug 2012 14:47:44 +0000 (+0200)
Subject: introduced exception type for tokenizer
X-Git-Url: http://git.localhorst.tv/?a=commitdiff_plain;h=2aba2da49a94fac57c7d2a469455102cf194957d;p=l2e.git

introduced exception type for tokenizer
---

diff --git a/src/loader/Tokenizer.cpp b/src/loader/Tokenizer.cpp
index 76a3a14..2b87d9c 100644
--- a/src/loader/Tokenizer.cpp
+++ b/src/loader/Tokenizer.cpp
@@ -8,7 +8,6 @@
 #include "Tokenizer.h"
 
 #include <istream>
-#include <stdexcept>
 
 namespace loader {
 
@@ -18,7 +17,7 @@ bool Tokenizer::HasMore() {
 
 void Tokenizer::Putback(const Token &t) {
 	if (isPutback) {
-		throw std::runtime_error("Tokenizer: double putback not supported");
+		throw LexerError("Tokenizer: double putback not supported");
 	} else {
 		putback = t;
 		isPutback = true;
@@ -65,7 +64,7 @@ Tokenizer::Token Tokenizer::ReadToken() {
 				} else if (std::islower(c)) {
 					CheckKeyword(t);
 				} else {
-					throw std::runtime_error(std::string("Tokenizer: cannot parse token: ") + c);
+					throw LexerError(std::string("Tokenizer: cannot parse token: ") + c);
 				}
 				return t;
 			}
@@ -105,7 +104,7 @@ Tokenizer::Token Tokenizer::ReadString() {
 	std::istream::char_type c;
 	in.get(c);
 	if (c != '"') {
-		throw std::runtime_error("Tokenizer: strings must begin with '\"'");
+		throw LexerError("Tokenizer: strings must begin with '\"'");
 	}
 
 	while (in.get(c)) {
diff --git a/src/loader/Tokenizer.h b/src/loader/Tokenizer.h
index 15eadf8..f2ab4aa 100644
--- a/src/loader/Tokenizer.h
+++ b/src/loader/Tokenizer.h
@@ -10,6 +10,7 @@
 
 #include <iosfwd>
 #include <ostream>
+#include <stdexcept>
 #include <string>
 
 namespace loader {
@@ -55,6 +56,11 @@ public:
 
 	};
 
+	class LexerError: public std::runtime_error {
+	public:
+		explicit LexerError(const std::string &msg) : std::runtime_error(msg) { }
+	};
+
 	bool HasMore();
 	Token GetNext();
 	void Putback(const Token &);