Remove the error return value and instead just throw error

processor/luahelper.lua

@@ -58,12 +58,10 @@ parserDefaultOptions = { delimiter = ",", hasheader = false, hascomments = false
 
 --- Validates options against a set of valid option keys.
 --- @param options ParserOptions? The options table to validate
---- @return boolean #True if options are valid
---- @return string? #Error message if invalid, nil if valid
 function areOptionsValid(options)
-	if options == nil then return true, nil end
+	if options == nil then return end
 
-	if type(options) ~= "table" then return false, "options must be a table" end
+	if type(options) ~= "table" then error("options must be a table") end
 
 	-- Build valid options list from validOptions table
 	local validOptionsStr = ""
@@ -73,12 +71,11 @@ function areOptionsValid(options)
 
 	for k, _ in pairs(options) do
 		if parserDefaultOptions[k] == nil then
-			return false,
+			error(
 				"unknown option: " .. tostring(k) .. " (valid options: " .. validOptionsStr .. ")"
+			)
 		end
 	end
-
-	return true, nil
 end
 
 --- Parses CSV text into rows and fields using a minimal RFC 4180 state machine.
@@ -99,13 +96,11 @@ end
 --- @param csv string The CSV text to parse.
 --- @param options ParserOptions? Options for the parser
 --- @return table #A table (array) of rows; each row is a table with numeric indices and optionally header-named keys.
---- @return string? #Error message if parsing fails.
 function fromCSV(csv, options)
 	if options == nil then options = {} end
 
 	-- Validate options
-	local isValid, err = areOptionsValid(options)
-	if not isValid then return {}, err end
+	areOptionsValid(options)
 
 	local delimiter = options.delimiter or parserDefaultOptions.delimiter
 	local hasheader = options.hasheader or parserDefaultOptions.hasheader
@@ -237,7 +232,7 @@ function fromCSV(csv, options)
 				else
 					rawset(t, key, value)
 				end
-			end
+			end,
 		}
 
 		local rows = {}
@@ -251,10 +246,10 @@ function fromCSV(csv, options)
 			table.insert(rows, row)
 		end
 		rows.Headers = headers
-		return rows, nil
+		return rows
 	end
 
-	return allRows, nil
+	return allRows
 end
 
 --- Converts a table of rows back to CSV text format (RFC 4180 compliant).
@@ -269,14 +264,12 @@ end
 ---
 --- @param rows table Array of rows, where each row is an array of field values.
 --- @param options ParserOptions? Options for the parser
---- @return string? #CSV-formatted text, error string?
---- @return string? #Error message if conversion fails.
+--- @return string #CSV-formatted text
 function toCSV(rows, options)
 	if options == nil then options = {} end
 
 	-- Validate options
-	local isValid, err = areOptionsValid(options)
-	if not isValid then return nil, err end
+	areOptionsValid(options)
 
 	local delimiter = options.delimiter or parserDefaultOptions.delimiter
 	local includeHeaders = options.hasheader or parserDefaultOptions.hasheader
@@ -332,7 +325,7 @@ function toCSV(rows, options)
 		table.insert(rowStrings, table.concat(fieldStrings, delimiter))
 	end
 
-	return table.concat(rowStrings, "\n"), nil
+	return table.concat(rowStrings, "\n")
 end
 
 -- String to number conversion helper