The fieldalignment analyzer, previously disabled by default, has been removed: it is redundant with the hover size/offset information displayed by v0.16.0 and its diagnostics were confusing.
The kind (identifiers) of all of gopls' code actions have changed to use more specific hierarchical names. For example, “Inline call” has changed from refactor.inline to refactor.inline.call. This allows clients to request particular code actions more precisely. The user manual now includes the identifier in the documentation for each code action.
Gopls now offers another code action, “Extract declarations to new file” (refactor.extract.toNewFile), which moves selected code sections to a newly created file within the same package. The created filename is chosen as the first {function, type, const, var} name encountered. In addition, import declarations are added or removed as needed.
The user can invoke this code action by selecting a function name, the keywords func, const, var, type, or by placing the caret on them without selecting, or by selecting a whole declaration or multiple declrations.
In order to avoid ambiguity and surprise about what to extract, some kinds of paritial selection of a declration cannot invoke this code action.
Hovering over a standard library symbol now displays information about the first Go release containing the symbol. For example, hovering over errors.As shows “Added in go1.13”.
The semantic tokens response now includes additional modifiers for the top-level constructor of the type of each symbol: interface, struct, signature, pointer, array, map, slice, chan, string, number, bool, and invalid. Editors may use this for syntax coloring.
Now, function signature help can be used on any identifier with a function signature, not just within the parentheses of a function being called.
A Definition query on a reference to a function jumps to the function's Go func declaration. If the function is implemented in C or assembly, the function has no body. Executing a second Definition query (while already at the Go declaration) will navigate you to the assembly implementation.