Code completion
Basic code completion helps you complete names of types, interfaces, methods, and keywords within the visibility scope.
GoLand analyzes the context and suggests the choices that are reachable from the current caret position. Suggestions also include Live templates. Completion is available for a non-English keyboard layout.
Invoke basic completion
By default, GoLand displays the code completion popup automatically as you type.
Alternatively, you can press Ctrl+Space or select
from the main menu.
Code completion is available for custom file types. However, GoLand does not recognize the structure of such files and suggests options regardless of whether they are appropriate in the current context.
Accept a suggestion from the list
Press Enter or double-click the relevant list item to insert it to the left of the caret.
Press Tab to replace the characters to the right from the caret.
Use Ctrl+Shift+Enter to make the current code construct syntactically correct (balance parentheses, add missing braces and semicolons, and so on).
Use specific keys and custom characters to accept the selected completion suggestion. To enable these features, go to the Editor | General | Code Completion settings page Ctrl+Alt+S and do the following:
To use specific keys, select the Insert selected suggestion by pressing space, dot, or other context-dependent keys checkbox. These keys depend on the language, your context, and so on.
To also use custom characters, enter the characters into the Additional characters to accept the completion field.
Code completion for functions
Invoke completion for functions
To view and complete functions that are suitable for a value of a certain type, hold Ctrl and press Space twice.
For example, you have the
t
variable of the string type. When you typet.
, hold Ctrl and press Space twice, you see a list of functions that accept thestring
type as the first argument.
Type-matching completion
Invoke type-matching completion
Smart type-matching code completion filters the suggestion list and shows only the types applicable to the current context. To invoke type-matching completion, start typing your code and press Ctrl+Shift+Space. Alternatively, select from the main menu. The following animation shows the difference between basic and type-matching completion.
Statement completion
You can create syntactically correct code constructs by using statement completion. It inserts the necessary syntax elements (parentheses, braces, and semicolons) and gets you in a position where you can start typing the next statement. To invoke statement completion, start typing a code construct and press Ctrl+Shift+Enter.
Hippie completion
Hippie completion is a completion engine that analyses your text in the visible scope and generates suggestions from the current context. It helps you complete any word from any of the currently opened files.
Expand a string at caret to an existing word
Type the initial string and do one of the following:
Press Alt+/ or choose
to search for matching words before the caret.Press Alt+Shift+/ or choose
to search for matching words after the caret and in other open files.
The first suggested value appears, and the prototype is highlighted in the source code.
Accept the suggestion or hold the Alt key and keep pressing \ until you find the word you need.
Completion of tags and attributes
GoLand automatically completes names and values of tags and attributes in HTML/XHTML, XML/XSL, and JSON.
Completion of tags and attribute names is based on the DTD or Schema the file is associated with. If there is no schema association, GoLand will use the file content (tag and attribute names and their values) to complete your input.

Machine learning-assisted completion ranking
GoLand allows you to prioritize completion suggestions based on choices that other users made in similar situations.
The ML completion mechanism does not add any new elements but orders the elements retrieved from code. Data is not exposed anywhere; it is collected locally.
Enable ML completion ranking
Press Ctrl+Alt+S to open settings and select Editor | General | Code Completion.
Under Machine Learning-Assisted Completion, enable the Sort completion suggestions based on machine learning option and select the languages for which you want to use the ML completion.
Enable relevance markers
Press Ctrl+Alt+S to open settings and select Editor | General | Code Completion.
Enable the following options:
Mark position changes in the completion popup: use the
and
icons to indicate whether the relevance of a suggestion is increasing or decreasing and therefore the suggestion has moved up or down the suggestion list.
Mark the most relevant item in the completion popup: use the
icon to indicate the most suitable suggestion on the list.
Full Line code completion
Full Line code completion provides suggestions as you type code in the editor. Suggestions are displayed in gray italics. To accept the suggestion, press Tab.

The IDE formats all suggestions and adds required brackets and quotes.
Each supported language has its own set of suggested code checks. The most basic ones, like unresolved reference checks, are available for most of the languages to guarantee that the IDE does not suggest non-existent variables and methods.
Full Line completion supports auto-import and uses smart filtering to avoid showing suggestions that tend to be canceled explicitly or deleted right after they were accepted.
Check system requirements
Full Line code completion requires a computer with an x64 processor that supports AVX2, or an ARM64 processor. If the AVX2 support is missing, Full Line Code Completion will be automatically disabled.
Enable the Full Line Code Completion plugin
This functionality relies on the Full Line Code Completion plugin, which is bundled and enabled in GoLand by default. If the relevant features are not available, make sure that you did not disable the plugin.
Press Ctrl+Alt+S to open settings and then select
.Open the Installed tab, find the Full Line Code Completion plugin, and select the checkbox next to the plugin name.
Enable and configure Full Line completion
Press Ctrl+Alt+S to open settings and select Editor | General | Inline Completion.
Select the Enable local Full Line completion suggestions checkbox and select the languages that you want to use Full Line completion with.
Models for Go are bundled with GoLand.
For some languages, for example, for CSS and JavaScript / TypeScript, you need to manually download models by clicking Download to enable completion.
Configure completion options:
Use the Enable automatic completion on typing option to display completion suggestions only when you press Alt+Shift+\, rather than automatically as you type.
Use the Enable multi-line suggestions option to get multi-line completion suggestions together with single-line suggestions.
Enable Synchronize inline and popup completions to view Full Line completion suggestions alongside regular completion. In this case, Full Line suggestions are marked with
in the list of suggestions.
Full Line completion runs locally using the models that are downloaded to your computer. From the Download models list, select the way to update these models. You can update the models automatically, manually, or confirm every update in a notification.
Change the completion shortcut
Hover over the suggestion.
In the popup that appears, click
and select the key that you want to use for accepting suggestions, for example, Right.
To assign your own shortcut, select Custom.
For quick access to the Full Line completion settings, click
in the popup.
Configure code completion settings
Configure completion options
Press Ctrl+Alt+S to open settings and then select
.To automatically display the suggestion list, select the Show suggestions as you type checkbox. If the checkbox is cleared, you have to call code completion explicitly by pressing Ctrl+Space for basic completion or Ctrl+Shift+Space for type-matching completion.
You can also choose to automatically insert suggestions when there is just one option: select the completion type under Automatically insert single suggestions for.
To sort suggestions in the alphabetical order, instead of sorting them by relevance, select the Sort suggestions alphabetically checkbox.
You can also toggle these modes by clicking
or
respectively in the lower-right corner of the suggestion list.
If you want the documentation popup to be displayed automatically for each item in the suggestion list as you scroll it, select the Show documentation popup in option. In the field to the right, specify the delay (in milliseconds), after which the popup should appear.
Completion tips and tricks
Narrow down the suggestion list
Narrow down the suggestion list by typing any part of a word (even characters from somewhere in the middle) or invoking code completion after a dot separator .
GoLand displays suggestions containing the characters you've entered, regardless of their position. This makes the use of wildcards unnecessary.
In case of CamelCase or snake_case names, type the initial letters only. GoLand automatically recognizes and matches the initial letters.
View reference
You can use the Quick Definition view by pressing Ctrl+Shift+I when you select an entry in the suggestion list:
You can use the Quick Information view by pressing Ctrl+Q when you select an entry in the suggestion list:
View code hierarchy
You can view code hierarchy when you've selected an entry from the suggestion list:
Ctrl+H: view type hierarchy
Ctrl+Shift+H: view method hierarchy.
Fill struct fields
When you create a new struct, you can automatically generate field names for it. This action works for generic structs.
The IDE ignores auto-generated protocol buffer fields that start with XXX_
when you invoke the Fill all fields intention action. These fields are shown only after you invoke completion for a second time.
Start typing the struct name, select it from the completion list.
Place a caret between braces of a struct.
Press Ctrl+Space. Alternatively, press Alt+Enter.
Select between the following options:
Fill all fields: generates values for all the fields that belong to the current struct.
Fill all fields recursively: generates values for all the fields that belong to the current struct type and all the pointers to other struct types recursively.
Fill fields: displays the Select Fields dialog where you can select the fields that you want to add. Select Recursively to parse fields from all the related structs. Clear the Enforce multiline checkbox to display all fields on a single line. In the Select Fields dialog, press Ctrl and click the fields that you want to add.
Click OK.
Format date and time
The time package uses predefined layouts that you can use in
Time.Format
andtime.Parse
. The reference time used in the layouts is the specific time:Mon Jan 2 15:04:05 MST 2006
. It means that to define your own format, you need to write down what the reference time would look like formatted your way.In GoLand, when you press Ctrl+Space, you will see placeholders for time and data elements from ISO-8601. Code completion also suggests standard time layouts outside of the string literal.
Troubleshooting
If code completion doesn't work, this may be due to one of the following reasons:
The Power Save Mode is on ( ). Turning it on minimizes power consumption of your laptop by eliminating the background operations, including error highlighting, on-the-fly inspections, and code completion.
A file containing types and functions that you want to appear in the completion suggestion list is marked as a plain text file.
External libraries that contain functions that you want to appear in the completion suggestion list are not added as dependencies or global libraries.
Code completion popup might not appear automatically if it takes too long to gather the completion options. For example, if the computer is busy with another task. In this case, you may still activate the completion popup manually via Ctrl+Space.