Live Template Variables
When a live template abbreviation is expanded, variables are replaced by predefined values (default or calculated using functions) and appear as input fields that the user can modify.
Variables within templates are declared in the following format:
Each variable is defined by an expression, and can accept some default value for cases when the expression fails to evaluate.
This expression may contain constructs of the following basic types:
- String constants in double quotes.
- The name of another variable defined in a live template.
- Predefined functions with possible arguments.
Template variables can be configured in the Edit Template Variables Dialog.
To configure template variables:
- On the Live Templates page of the Settings / Preferences Dialog, select the template (or create a new one) for which you want to configure variables.
- Enter the variables in the correct places in template text and click Edit variables
- In the Edit Template Variables dialog, you can do the following for each variable:
- Change its name.
- Define the expression using predefined functions.
- Specify the default value for cases when the expression fails to evaluate.
- Specify whether you want to skip the variable when prompting the user for input if the variable was defined using its expression.
Predefined template variables
IntelliJ IDEA supports the following predefined live template variables that cannot be modified:
$END$indicates the position of the cursor after the template is expanded. For example, the template
return $END$;will be expanded into
return ;with the cursor positioned right before the semicolon.
$SELECTION$is used in surround templates and denotes the code fragment to be wrapped. After the template is expanded, the selected text is wrapped as specified in the template. For example, if you select
EXAMPLEin your code and invoke the
"$SELECTION$"template via the assigned abbreviation or by pressing Ctrl+Alt+T and selecting the desired template from the list, IntelliJ IDEA will wrap the selection in double quotes as follows:
Predefined functions used in live template variables
The following functions can be used to define live template variables:
|Creates a symbol of type with an annotation that resides at the specified location. For an example, see Live Templates in the iterations group.|
|Suggests a supertype for a Kotlin object expression.|
|Suggests all array variables applicable in the current scope. For an example, see Live Templates in the iterations group.|
| ||Returns the characters that indicate the end of a block comment in the current language context.|
| ||Returns the characters that indicate the start of a block comment in the current language context.|
| Converts a string into camelCase. For example, |
|Capitalizes the first letter of the parameter.|
| Capitalizes all the letters of a CamelCase name passed as the parameter, and inserts an underscore between the parts. For example, |
|Casts the right-side expression to the left-side expression type. It is used in the iterations group to have a single template for generating both raw-type and Generics Collections.|
|Returns the name of the current class (the class where the template is expanded).|
|This expression substitutes for the class name completion at the variable position.|
|Returns the contents of the system clipboard.|
| ||Returns the characters that indicate the end of a comment in the current language context. The return value is empty if line comments are defined in the current language.|
| ||Returns the characters that indicate the start of a comment in the current language context. If line comments are defined in the current language, their start indicator is preferable.|
|Invokes code completion at the position of the variable.|
|Invokes smart type completion at the position of the variable.|
|Returns component type of an array. For an example, see live templates in the iterations group and in the other group.|
|Returns the current package name.|
Returns the current system date in the specified format.
Without a parameter, the current date is returned in the default system format.
|Replaces the first letter of the parameter with the corresponding lowercase letter.|
|Returns the children of the class specified as a string parameter.|
|Returns a list of comma-separated strings suggested for completion when the template is expanded.|
|Escapes the string specified as the parameter.|
|Returns the expected type of the expression into which the template expands. Makes sense if the template expands in the right part of an assignment, after |
|Returns the name of the current file with its extension.|
|Returns the name of the current file without its extension.|
|Returns the first word of the string passed as the parameter.|
Returns a Groovy script with the specified code.
You can use the
| Makes a guess on the type of elements stored in a |
|Returns the type of an iterable component, such as an array or a collection.|
|Returns the name of a variable that can be iterated.|
|Returns a suggested name for an index.|
|Returns the suggested name for a variable.|
| ||Returns the characters that indicate the start of a line comment in the current language context.|
|Returns the current line number.|
| Converts a camelCase string into lower case and inserts n-dashes as separators. For example, |
|Returns the name of the method in which the template is expanded.|
|Returns the list of parameters of the method in which the template is expanded.|
|Returns the type of the value returned by the current method (in which the template is expanded).|
|Returns the fully qualified name of the current class (in which the template is expanded).|
|Declares the left-side variable with a type of the right-side expression. It is used in the iterations group to have a single template for generating both raw-type and Generics Collections.|
| Converts a string into snake_case. For example, |
| Converts a string into lowercase and inserts spaces as separators. For example, |
| Removes the extension after the specified delimiter and returns only the file name. This is helpful for test file names (for example, |
|Returns the subtypes of the type passed as the parameter.|
|Doesn't suggest |
| Suggests the name of an index variable from most commonly used ones: |
| Suggests the name for a variable based on the variable type and its initializer expression, according to your code style settings that refer to the variable naming rules.|
For example, if it is a variable that holds an element within an iteration, IntelliJ IDEA makes a guess on the most reasonable name, taking into account the name of the container being iterated.
|Returns the current system time in the specified format.|
|Returns the type of the variable passed as the parameter.|
| Replaces underscores with camelCase letters in the string passed as the parameter. For example, |
| Replaces underscores with spaces in the string passed as the parameter. For example, |
|Returns the name of the current user.|
| Suggests all variables that may be assigned to the type passed as the parameter, for example, |