LSP integration steps 1-4, part of 5.

lsp/Diagnostic.h

@@ -0,0 +1,37 @@
+/*
+ * Diagnostic.h - LSP diagnostic data types
+ */
+#ifndef KTE_LSP_DIAGNOSTIC_H
+#define KTE_LSP_DIAGNOSTIC_H
+
+#include <optional>
+#include <string>
+#include <vector>
+
+#include "LspTypes.h"
+
+namespace kte::lsp {
+enum class DiagnosticSeverity {
+	Error = 1,
+	Warning = 2,
+	Information = 3,
+	Hint = 4
+};
+
+struct DiagnosticRelatedInformation {
+	std::string uri; // related location URI
+	Range range; // related range
+	std::string message;
+};
+
+struct Diagnostic {
+	Range range{};
+	DiagnosticSeverity severity{DiagnosticSeverity::Information};
+	std::optional<std::string> code;
+	std::optional<std::string> source;
+	std::string message;
+	std::vector<DiagnosticRelatedInformation> relatedInfo;
+};
+} // namespace kte::lsp
+
+#endif // KTE_LSP_DIAGNOSTIC_H