From 80d6c4f64ad4d293cc23e845f7013d6d45c309c5 Mon Sep 17 00:00:00 2001
From: Mikko Rasa <tdb@tdb.fi>
Date: Sat, 30 Sep 2006 19:56:06 +0000
Subject: [PATCH] Support ignoring statements Allow numbers to begin with a
 plus sign Support exponents in floating point numbers

---
 source/loader.h   |  6 +++++-
 source/parser.cpp | 37 +++++++++++++++++++++++++++++++++----
 2 files changed, 38 insertions(+), 5 deletions(-)

diff --git a/source/loader.h b/source/loader.h
index 2fe0292..6e9c4f8 100644
--- a/source/loader.h
+++ b/source/loader.h
@@ -172,6 +172,9 @@ protected:
 	void add(const std::string &k, T L::*p)
 	{ actions.insert(typename ActionMap::value_type(k, new LoadValue<L, T>(p))); }
 
+	void add(const std::string &k)
+	{ actions.insert(ActionMap::value_type(k, 0)); }
+
 	template<typename S>
 	void load_sub(S &s)
 	{ load_sub<S, typename S::Loader>(s); }
@@ -196,7 +199,8 @@ private:
 		ActionMap::iterator j=actions.find(st.keyword);
 		if(j==actions.end())
 			throw Exception(st.get_location()+": Unknown keyword '"+st.keyword+"'");
-		j->second->execute(*this, st);
+		if(j->second)
+			j->second->execute(*this, st);
 		cur_st=0;
 	}
 };
diff --git a/source/parser.cpp b/source/parser.cpp
index 7b9af11..f74be86 100644
--- a/source/parser.cpp
+++ b/source/parser.cpp
@@ -143,7 +143,9 @@ Token Parser::parse_token()
 	enum ParseState
 	{
 		INIT,
-		NEGATIVE,
+		SIGN,
+		FLOATEXPINIT,
+		FLOATEXPSIGN,
 		STRING,
 		ACCEPT,
 		ZERO,
@@ -151,11 +153,14 @@ Token Parser::parse_token()
 		HEXADECIMAL,
 		OCTAL,
 		FLOAT,
+		FLOATEXP,
 		IDENTIFIER
 	};
 
 	static Token::Type token_type[]=
 	{
+		Token::SPECIAL,
+		Token::SPECIAL,
 		Token::SPECIAL,
 		Token::SPECIAL,
 		Token::STRING,
@@ -165,6 +170,7 @@ Token Parser::parse_token()
 		Token::INTEGER,
 		Token::INTEGER,
 		Token::FLOAT,
+		Token::FLOAT,
 		Token::IDENTIFIER
 	};
 
@@ -185,8 +191,8 @@ Token Parser::parse_token()
 		case INIT:
 			if(c=='0')
 				state=ZERO;
-			else if(c=='-')
-				state=NEGATIVE;
+			else if(c=='-' || c=='+')
+				state=SIGN;
 			else if(c=='.')
 				state=FLOAT;
 			else if(c=='"')
@@ -201,7 +207,7 @@ Token Parser::parse_token()
 				parse_error(c, state);
 			break;
 		
-		case NEGATIVE:
+		case SIGN:
 			if(c=='0')
 				state=ZERO;
 			else if(isdigit(c))
@@ -241,6 +247,29 @@ Token Parser::parse_token()
 			break;
 
 		case FLOAT:
+			if(c=='e' || c=='E')
+				state=FLOATEXPINIT;
+			else if(!isdigit(c))
+				parse_error(c, state);
+			break;
+
+		case FLOATEXPINIT:
+			if(c=='+' || c=='-')
+				state=FLOATEXPSIGN;
+			else if(isdigit(c))
+				state=FLOATEXP;
+			else
+				parse_error(c, state);
+			break;
+
+		case FLOATEXPSIGN:
+			if(isdigit(c))
+				state=FLOATEXP;
+			else
+				parse_error(c, state);
+			break;
+
+		case FLOATEXP:
 			if(!isdigit(c))
 				parse_error(c, state);
 			break;
-- 
2.45.2