X-Git-Url: http://git.tdb.fi/?a=blobdiff_plain;f=source%2Fprogramparser.cpp;h=58649ec0d77cfb189aa352b003f65e6637109231;hb=961715848c111907b5f443c5b545a429b40583e6;hp=c6cdfd06246f1c14683919fcfec637b8adf85058;hpb=a36992487d018d8801ead6980b362b00a2f5f5c5;p=libs%2Fgl.git

diff --git a/source/programparser.cpp b/source/programparser.cpp
index c6cdfd06..58649ec0 100644
--- a/source/programparser.cpp
+++ b/source/programparser.cpp
@@ -81,14 +81,15 @@ Module &ProgramParser::parse(IO::Base &io)
 void ProgramParser::parse_source(Module &module)
 {
 	cur_module = &module;
+	cur_context = &module.global_context;
 	iter = source.begin();
-	Context *cur_context = &module.global_context;
 	while(1)
 	{
 		while(Node *statement = parse_global_declaration())
 			cur_context->content.body.push_back(statement);
 		cur_context->present = !cur_context->content.body.empty();
 
+		Context *prev_context = cur_context;
 		parse_token();
 		string token = parse_token();
 		if(token.empty())
@@ -103,6 +104,7 @@ void ProgramParser::parse_source(Module &module)
 			cur_context = &module.fragment_context;
 		else
 			throw runtime_error(format("Parse error at '%s': expected context identifier", token));
+		cur_context->previous = prev_context;
 
 		for(; (iter!=source.end() && *iter!='\n'); ++iter) ;
 	}
@@ -355,6 +357,8 @@ Node *ProgramParser::parse_statement()
 		return parse_conditional();
 	else if(token=="for")
 		return parse_iteration();
+	else if(token=="passthrough")
+		return parse_passthrough();
 	else if(token=="return")
 		return parse_return();
 	else if(is_qualifier(token) || is_type(token))
@@ -693,6 +697,20 @@ Iteration *ProgramParser::parse_iteration()
 	return loop.release();
 }
 
+Passthrough *ProgramParser::parse_passthrough()
+{
+	expect("passthrough");
+	RefPtr<Passthrough> pass = new Passthrough;
+	if(cur_context->type==GEOMETRY)
+	{
+		expect("[");
+		pass->subscript = parse_expression();
+		expect("]");
+	}
+	expect(";");
+	return pass.release();
+}
+
 Return *ProgramParser::parse_return()
 {
 	expect("return");