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# Description Old code was comparing remaining positional arguments with total number of arguments, where it should've compared remaining positional with with remaining arguments of any kind. This means that if a function was given too few arguments, `calculate_end_span` would believe that it actually had too many arguments, since after parsing the first few arguments, the number of remaining arguments needed were fewer than the *total* number of arguments, of which we had used several. Fixes #9072 Fixes: https://github.com/nushell/nushell/issues/13930 Fixes: https://github.com/nushell/nushell/issues/12069 Fixes: https://github.com/nushell/nushell/issues/8385 Extracted from #10381 ## Bonus It also improves the error handling on missing positional arguments before keywords (no longer crashing since #9851). Instead of just giving the keyword to the parser for the missing positional, we give an explicit error about a missing positional argument. I would like better descriptions than "missing var_name" though, but I'm not sure if that's available without Old error ``` Error: nu::parser::parse_mismatch × Parse mismatch during operation. ╭─[entry #1:1:1] 1 │ let = if foo · ┬ · ╰── expected valid variable name ╰──── ``` New error ``` Error: nu::parser::missing_positional × Missing required positional argument. ╭─[entry #18:1:1] 1 │ let = foo · ┬ · ╰── missing var_name ╰──── help: Usage: let <var_name> = <initial_value> ``` # User-Facing Changes The program `alias = = =` is no longer accepted by the parser
Nushell core libraries and plugins
These sub-crates form both the foundation for Nu and a set of plugins which extend Nu with additional functionality.
Foundational libraries are split into two kinds of crates:
- Core crates - those crates that work together to build the Nushell language engine
- Support crates - a set of crates that support the engine with additional features like JSON support, ANSI support, and more.
Plugins are likewise also split into two types:
- Core plugins - plugins that provide part of the default experience of Nu, including access to the system properties, processes, and web-connectivity features.
- Extra plugins - these plugins run a wide range of different capabilities like working with different file types, charting, viewing binary data, and more.