Added connection display

comdel/parser/astnode.h

@@ -2,6 +2,7 @@
 #define AST_NODE_H
 
 #include "token.h"
+#include "sourceerror.h"
 #include <optional>
 #include <vector>
 
@@ -173,6 +174,52 @@ struct DisplayItemNode: public AstNode
 {
     IdentifierNode type;
     std::vector<PropertyNode> values;
+
+    long long int asInt(std::vector<SourceError>* errors, const std::string& property, long long int _default = 0) {
+        for(auto& prop: values) {
+            if(prop.key.value == property) {
+                if(prop.value.is(ValueNode::INT)) {
+                    return prop.value.asInt();
+                } else {
+                    if(errors != nullptr) {
+                        errors->emplace_back(prop.value.span, "expected number");
+                    }
+                }
+            }
+        }
+        return _default;
+    }
+
+    std::string asIdentifier(std::vector<SourceError>* errors, const std::string& property, std::string _default = "") {
+        for(auto& prop: values) {
+            if(prop.key.value == property) {
+                if(prop.value.is(ValueNode::IDENTIFIER)) {
+                    return prop.value.asIdentifier();
+                } else {
+                    if(errors != nullptr) {
+                        errors->emplace_back(prop.value.span, "expected identifier");
+                    }
+                }
+            }
+        }
+        return _default;
+    }
+
+
+    std::string asString(std::vector<SourceError>* errors, const std::string& property, std::string _default = "") {
+        for(auto& prop: values) {
+            if(prop.key.value == property) {
+                if(prop.value.is(ValueNode::STRING)) {
+                    return prop.value.asString();
+                } else {
+                    if(errors != nullptr) {
+                        errors->emplace_back(prop.value.span, "expected string");
+                    }
+                }
+            }
+        }
+        return _default;
+    }
 };
 
 struct DisplayNode: public AstNode