1 files changed, 46 insertions, 8 deletions

diff --git a/modules/gdscript/gd_parser.cpp b/modules/gdscript/gd_parser.cpp
index 34c39c802..5147ccd63 100644
--- a/modules/gdscript/gd_parser.cpp
+++ b/modules/gdscript/gd_parser.cpp
@@ -375,6 +375,22 @@ GDParser::Node* GDParser::_parse_expression(Node *p_parent,bool p_static,bool p_
 			constant->value=Math_PI;
 			tokenizer->advance();
 			expr=constant;
+		}
+		else if (tokenizer->get_token() == GDTokenizer::TK_CONST_INF) {
+
+			//constant defined by tokenizer
+			ConstantNode *constant = alloc_node<ConstantNode>();
+			constant->value = Math_INF;
+			tokenizer->advance();
+			expr = constant;
+		}
+		else if (tokenizer->get_token() == GDTokenizer::TK_CONST_NAN) {
+
+			//constant defined by tokenizer
+			ConstantNode *constant = alloc_node<ConstantNode>();
+			constant->value = Math_NAN;
+			tokenizer->advance();
+			expr = constant;
 		} else if (tokenizer->get_token()==GDTokenizer::TK_PR_PRELOAD) {
 
 			//constant defined by tokenizer
@@ -386,21 +402,42 @@ GDParser::Node* GDParser::_parse_expression(Node *p_parent,bool p_static,bool p_
 			tokenizer->advance();
 
 			String path;
+			bool found_constant = false;
 			bool valid = false;
+			ConstantNode *cn;
+
 			Node *subexpr = _parse_and_reduce_expression(p_parent, p_static);
 			if (subexpr) {
 				if (subexpr->type == Node::TYPE_CONSTANT) {
-					ConstantNode *cn = static_cast<ConstantNode*>(subexpr);
-					if (cn->value.get_type() == Variant::STRING) {
-						valid = true;
-						path = (String) cn->value;
+					cn = static_cast<ConstantNode*>(subexpr);
+					found_constant = true;
+				}
+				if (subexpr->type == Node::TYPE_IDENTIFIER) {
+					IdentifierNode *in = static_cast<IdentifierNode*>(subexpr);
+					Vector<ClassNode::Constant> ce = current_class->constant_expressions;
+
+					// Try to find the constant expression by the identifier
+					for(int i=0; i < ce.size(); ++i){
+						if(ce[i].identifier == in->name) {
+							if(ce[i].expression->type == Node::TYPE_CONSTANT) {
+								cn = static_cast<ConstantNode*>(ce[i].expression);
+								found_constant = true;
+							}
+						}
 					}
 				}
+
+				if (found_constant && cn->value.get_type() == Variant::STRING) {
+					valid = true;
+					path = (String) cn->value;
+				}
 			}
+
 			if (!valid) {
 				_set_error("expected string constant as 'preload' argument.");
 				return NULL;
 			}
+
 			if (!path.is_abs_path() && base_path!="")
 				path=base_path+"/"+path;
 			path = path.replace("///","//").simplify_path();
@@ -2577,7 +2614,7 @@ void GDParser::_parse_block(BlockNode *p_block,bool p_static) {
 						Vector<Node*> args;
 						Vector<double> constants;
 
-						bool constant=true;
+						bool constant=false;
 
 						for(int i=1;i<op->arguments.size();i++) {
 							args.push_back(op->arguments[i]);
@@ -2585,13 +2622,14 @@ void GDParser::_parse_block(BlockNode *p_block,bool p_static) {
 								ConstantNode *c = static_cast<ConstantNode*>(op->arguments[i]);
 								if (c->value.get_type()==Variant::REAL || c->value.get_type()==Variant::INT) {
 									constants.push_back(c->value);
-								} else {
-									constant=false;
+									constant=true;
 								}
+							} else {
+								constant=false;
 							}
 						}
 
-						if (args.size()>0 || args.size()<4) {
+						if (args.size()>0 && args.size()<4) {
 
 							if (constant) {