This document describes the syntax of the scriban language in a templating context (within {{
and }}
).
The language rules are the same in a pure scripting context.
NOTE: This document does not describe the
liquid
language. Check theliquid website
directly.
- Table of Contents
- 1. Blocks
- 2 Comments
- 3 Literals
- 4 Variables
- 5 Objects
- 6 Arrays
- 7 Functions
- 8 Expressions
- 9 Statements
- 9.1 Single expression
- 9.2 Compound Assignment
- 9.3
if <expression>
,else
,else if <expression>
- 9.4
case
andwhen
- 9.5 Loops
- 9.6
capture <variable> ... end
- 9.7
readonly <variable>
- 9.8
import <variable_path>
- 9.9
with <variable> ... end
- 9.10
wrap <function> <arg1...argn> ... end
- 9.11
include <name> arg1?...argn?
- 9.12
ret <expression>?
There are 3 types of block of text in a template:
- Code block: contains scriban template statements
- Text block: a plain block to output as is
- Escape block: a text block that can escape code blocks
A text enclosed by {{
and }}
is a scriban code block that will be evaluated by the scriban templating engine.
A scriban code block may contain:
- a single line expression statement:
{{ name }}
- or a multiline statements:
{{ if !name name = "default" end name }}
- or statements separated by a semi-colon
;
to allow compact forms in some use cases:{{if !name; name = "default"; end; name }}
Inside a code block, except for the EOL after each statement, white spaces characters are not affecting the parsing. There is only one case where whitespace is used to disambiguate between an array indexer and an array initializer.
Also, if a statement is an expression (but not an assignment expression), the result of the expression will be output to the rendering output of the template:
input
{{
x = "5" # This assignment will not output anything
x # This expression will print 5
x 1 # This expression will print 6
}}
output
56
Note that in the previous example, there is no EOL between 5
and 6
because we are inside a code block.
You can still use a plain string with an EOL inside a code block "\n"
or you could use mixed code and text blocks:
input
{{ x = "5" }}
{{ x }}
{{ x 1 }}
output
5
6
Otherwise, any text is considered as a text block and simply output as is
Hello this is {{ name }}, welcome to scriban!
______________ _____________________
^ text block ^ text block
Any code and text block can be escaped to produce a text block by enclosing it with {%{
and }%}
For example the following escape:
input:
{%{Hello this is {{ name }}}%}
output:Hello this is {{ name }}
Any escape block can be also escaped by increasing the number of %
in the starting and ending block:
input:
{%%{This is an escaped block: }%} here}%%}
output:This is an escaped block: }%} here
This allow effectively to nest escape blocks and still be able to escape them.
Hence a starting escape block {%%%%{
will required an ending }%%%%}
By default, any whitespace (including new lines) before or after a code/escape block are copied as-is to the output.
Scriban provides two modes for controlling whitespace:
-
The greedy mode using the character
-
(e.g{{-
or-}}
), removes any whitespace, including newlines Examples with the variablename = "foo"
:-
Strip whitespace on the left:
input
This is a < {{- name}}> text
output
This is a <foo> text
-
Strip on the right:
input
This is a <{{ name -}} > text:
output
This is a <foo> text
-
Strip on both left and right:
input
This is a < {{- name -}} > text:
output
This is a <foo> text
-
-
The non greedy mode using the character
~
- Using a
{{~
will remove any whitespace before but will stop on the first newline without including it - Using a
~}}
will remove any whitespace after including the first newline but will stop after
This mode is very convenient when you want to use only a scriban statement on a line, but want that line to be completely removed from the output, but to keep spaces before and after this line intact.
In the following example, we want to remove entirely the lines
{{~ for product in products ~}}
and{{~ end ~}}
, but we want for example to keep the indentation of the opening<li>
.Using the greedy mode
{{-
or-}}
would have removed all whitespace and lines and would have put the results on a single line.input
<ul> {{~ for product in products ~}} <li>{{ product.name }}</li> {{~ end ~}} </ul>
output
<ul> <li>Orange</li> <li>Banana</li> <li>Apple</li> </ul>
- Using a
Both mode ~
and '-' can also be used with escape blocks {%%{~
or ~}%%}
or {%%{-
or -}%%}
By default, when a code enter is without a left strip (e.g {{-
or {{~
) and is preceded by only whitespace on the same line, the content of the block will be indented accordingly to the number of whitespace before the code enter.
input
{{ a_multi_line_value = "test1\ntest2\ntest3\n" ~}}
{{ a_multi_line_value }}Hello
Notice the 3 whitespace characters
before the expression {{ a_multi_line_value }}
.
output
test1
test2
test3
Hello
The output is auto-indented. This feature can be turned off on by setting TemplateContext.AutoIndent = false
.
Note that if the previous line contains a greedy right strip -}}
, the indent will be skipped on the next code enter of the next line.
input
{{ a_multi_line_value = "test1\ntest2\ntest3\n" -}}
{{ a_multi_line_value }}Hello
output
test1
test2
test3
Hello
Within a code block, scriban supports single line comments #
and multi-line comments ##
:
{{ name # this is a single line comment }}
input
{{ ## This
is a multi
line
comment ## }}
output
As you can notice, both single line and multi-line comments can be closed by the presence of a code block exit tag }}
Scriban supports two types of strings:
-
regular strings enclosed by double quotes
"..."
or simple quotes'...'
. Regular strings supports multiline and will interpret the following escape sequences:\'
single quote\"
double quote\\
backslash\n
new line\r
carriage return\t
tab\b
backspace\f
form feed\uxxxx
where xxxx is a unicode hexa code number0000
toffff
\x00-\xFF
a hexadecimal ranging from0x00
to0xFF
-
verbatim strings enclosed by backstick quotes
`...`
. They are, for example, useful to use with for regex patterns :input
{{ "this is a text" | regex.split `\s ` }}
output
[this, is, a, text]
A number in scriban {{ 100 }}
is similar to a javascript number:
- Integers:
100
,1e3
- Hexadecimal integers:
0x1ef
and unsigned0x80000000u
- Hexadecimal integers:
- Floats:
100.0
,1.0e3
,1.0e-3
- 32-bit floats:
100.0f
- 64-bit floats:
100.0d
- 128-bit decimals:
100.0m
- 32-bit floats:
The boolean value {{ true }}
or {{ false }}
input
{{ true }}
{{ false }}
output
true
false
The null value {{ null }}
When resolving to a string output, the null value will output an empty string:
input
{{ null }}
output
Scriban supports the concept of global and local variables
A global/property variable like {{ name }}
is a liquid like handle, starting by a letter or underscore _
and following by a letter A-Z a-z
, a digit 0-9
, an underscore _
The following text are valid variable names:
var
var9
_var
NOTE: In liquid, the character
-
is allowed in a variable name, but when translating it to a scriban, you will have to enclose it into a quoted string
A local variable like {{ $name }}
is an identifier starting with $
. A local variable is only accessible within the same include page or function body.
The special local variable $
alone is an array containing the arguments passed to the current function or include page.
The special local variables $0
$1
... $n
is a shorthand of $[0]
, $[1]
... $[n]
. e.g Using $0
returns the first argument of the current function or including page.
The this
variable gives you access to the current object bound where you have access to all local variables for the current scope.
Thus the following variable access are equivalent:
input
{{
a = 5
a # output 5
this.a = 6
a # output 6
this["a"] = 7
a # output 7
}}
output
567
In the case of the with
statement, the this operator refers to the object passed to with
:
input
{{
a = {x: 1, y: 2}
with a
b = this
end
b.x
}}
output
1
The empty
variable represents simply an empty object. It is mainly relevant to be compatible with liquid, by providing a way to compare an object with the empty
object to check if it is empty or not:
input
{{
a = {}
b = [1, 2]~}}
{{a == empty}}
{{b == empty}}
output
true
false
Scriban supports javascript like objects {...}
An object can be initialized empty :
{{ myobject = {} }}
An object can be initialized with some members:
{{ myobject = { member1: "yes", member2: "no" } }}
or use a json syntax:
{{ myobject = { "member1": "yes", "member2": "no" } }}
An object can be initialized with some members over multiple lines:
{{
myobject = {
member1: "yes",
member2: "no"
}
}}
Members of an object can be accessed:
{{ myobject.member1 }}
also equivalent to {{ myobject["member1"] }}
You can access optional members in chain via the optional member operator ?.
(instead of the regular member operator: .
) (New in 3.0)
{{ myobject.member1?.submember1?.submember2 ?? "nothing" }}
will return "nothing"
as member1
doesn't contain a submember1
/submember2
.
If the object is a "pure" scriban objects (created with a {...}
or instantiated by the runtime as a ScriptObject
), you can also add members to it with a simple assignment:
input
{{
myobject = {}
myobject.member3 = "may be"
myobject.member3
}}
output
may be
NOTICE
By default, Properties and methods of .NET objects are automatically exposed with lowercase and
_
names. It means that a property likeMyMethodIsNice
will be exposed asmy_method_is_nice
. This is the default convention, originally to match the behavior of liquid templates. If you want to change this behavior, you need to use aMemberRenamer
delegate
Any object can respond the the property .empty?
to check if it is empty or not:
input
{{
a = {}
b = [1, 2]~}}
{{a.empty?}}
{{b.empty?}}
output
true
false
An array can be initialized empty :
{{ myarray = [] }}
An array can be initialized with some items:
{{ myarray = [1, 2, 3, 4] }}
An array can be initialized with some items over multiple lines:
{{
myarray = [
1,
2,
3,
4,
]
}}
Items of an array can be zero-based indexed:
{{ myarray[0] }}
If the array is a "pure" scriban array (created with a [...]
or instantiated by the runtime as a ScriptArray
), you can also add items to it with a simple assignment that will expand automatically the array depending on the index:
{{
myarray = []
myarray[0] = 1
myarray[1] = 2
myarray[2] = 3
myarray[3] = 4
}}
You can also manipulate arrays with the array
builtin object.
Important notice
While whitespace characters are mostly not relevant while parsing in scriban, there is a case where a whitespace helps to disambiguate between an array indexer and an array initializer.
For instance, if a whitespace is found before a
[
and the previous expression was a variable path expressions (see later), the following expression[...]
will be considered as an array initializer instead of an array indexer:{{ myfunction [1] # There is a whitespace after myfunction. # It will result in a call to myfunction passing an array as an argument myvariable[1] # Without a whitespace, this is accessing # an element in the array provided by myvariable }}
An array can also contains attached properties:
input
{{
a = [5, 6, 7]
a.x = "yes"
a.x a[0]
}}
output
yes5
Arrays have a size
property that can be used to query the number of elements in the array:
input
{{
a = [1, 2, 3]
a.size
}}
output
3
Scriban allows to define 4 kind of functions:
- Simple functions
- Anonymous functions
- Parametric functions (New in 3.0)
- Inline functions (New in 3.0)
The following declares a function sub
that uses its first argument and subtract from it the second argument:
{{func sub
ret $0 - $1
end}}
All argument are passed to the special variable $
that will contain the list of direct arguments
and named arguments:
$0
or$[0]
will access the first argument$1
or$[1]
will access the second argument$[-1]
will access the last argument$.named
will access the named argumentnamed
This function can then be used:
input
{{sub 5 1}}
{{5 | sub 1}}
output
4
4
As you can notice from the example above, when using the pipe, the result of the pipe is pushed as the first argument of the pipe receiver.
Note that a function can have mixed text statements as well:
{{func inc}}
This is a text with the following argument {{ $0 1 }}
{{end}}
NOTE: Setting a non-local variable (e.g
a = 10
) in a simple function will be set at the global level and not at the function level.Parametric functions are solving this behavior by introducing a new variable scope inside the function that includes parameters.
Anonymous functions are like simple functions but can be used in expressions (e.g as the last argument of function call)
input
{{ sub = do; ret $0 - $1; end; 1 | sub 3 }}
output
-2
They are very convenient to build custom block functions:
input
{{ func launch; ret $0 1 2; end
launch do
ret $0 $1
end
}}
output
3
They are similar to simple functions but they are declared with parenthesis, while also supporting declaration of different kind of parameters (normal, optional, variable).
Another difference with simple functions is that they require function calls and arguments to match the expected function parameters.
- A function with normal parameters:
{{func sub(x,y)
ret x - y
end}}
input
{{sub 5 1}}
{{5 | sub 1}}
output
4
4
- A function with normal parameters and optional parameters with default values:
{{func sub_opt(x, y, z = 1, w = 2)
ret x - y - z - w
end}}
input
{{sub_opt 5 1}}
{{5 | sub_opt 1}}
output
1
1
Here we override the value of z
and set it to 0
instead of default 1
:
input
{{sub_opt 5 1 0 }}
{{5 | sub_opt 1 0}}
output
2
2
- A function with normal parameters and optional parameters with default values:
{{func sub_variable(x, y...)
ret x - (y[0] ?? 0) - (y[1] ?? 0)
end}}
input
{{sub_variable 5 1 -1}
{{5 | sub_variable 1 -1}}
output
5
5
NOTE: The special variable
$
is still accessible in parametric functions and represent the direct list of arguments. In the example above,$ = [5, [1, -1]]
For simple functions, it is convenient to define simple functions like mathematical functions:
{{ sub(x,y) = x - y }}
Inline functions are similar to parametric functions but they only support normal parameters. They don't support optional or variable parameters.
Because functions are object, they can be stored into a property of an object by using the alias @
operator:
{{
myobject.myinc = @inc # Use the @ alias operator to allow to
# use a function without evaluating it
x = 1 | myobject.myinc # x = x 1
}}
The function aliasing operator @
allows to pass a function as a parameter to another function, enabling powerful function compositions.
Scriban supports conventional unary and binary expressions.
A variable path expression contains the path to a variable:
- A simple variable access:
{{ name }}
e.g resolve to the top level variablename
- An array access:
{{ myarray[1] }}
e.g resolve to the top level variablemyarray
and an indexer to the array - A member access:
{{ myobject.member1.myarray[2] }}
e.g resolve to the top level variablemyobject
, then the propertymember1
this object, the propertymyarray
and an indexer to the array returned bymyarray
Note that a variable path can either point to a simple variable or can result into calling a parameter less function.
A value can be assigned to a top level variable or to the member of an object/array:
-
{{ name = "foo" }}
e.g Assign the string"foo"
the variablename
-
{{ myobject.member1.myarray[0] = "foo" }}
An assign expression must be a top level expression statement and cannot be used within a sub-expression.
An expression enclosed by (
and )
{{ name = ('foo' 'bar') }}
The following binary operators are supported for numbers:
Operator | Description |
---|---|
<left> <right> |
add left to right number |
<left> - <right> |
subtract right number from left |
<left> * <right> |
multiply left by right number |
<left> / <right> |
divide left by right number |
<left> // <right> |
divide left by right number and round to an integer |
<left> % <right> |
calculates the modulus of left by right |
If left or right is a float and the other is an integer, the result of the operation will be a float.
The following binary operators are supported for strings:
Operator | Description |
---|---|
'left' <right> |
concatenates left to right string: "ab" "c" -> "abc" |
'left' * <right> |
concatenates the left string right times: 'a' * 5 -> aaaaa . left and right and be swapped as long as there is one string and one number. |
As long as there is a string in a binary operation, the other part will be automatically converted to a string.
The following literals are converted to plain strings:
null -> ""
. e.g:"aaaa" null -> "aaaa"
0 -> "0"
1.0 -> "1.0"
true -> "true"
false -> "false"
A boolean expression produces a boolean by comparing a left and right value.
Operator | Description |
---|---|
<left> == <right> |
Is left equal to right? |
<left> != <right> |
Is left not equal to right? |
<left> > <right> |
Is left greater than right? |
<left> >= <right> |
Is left greater or equal to right? |
<left> < <right> |
Is left less than right? |
<left> <= <right> |
Is left less or equal to right? |
They work with both numbers
, strings
and datetimes.
You can combine conditional expressions with &&
(and operator) and ||
(or operator).
Unlike in javascript
it always returns boolean
and never <left>
or <right>
.
Operator | Description |
---|---|
<left> && <right> |
Is left true and right true? |
<left> || <right> |
Is left true or right true? |
The conditional expression cond ? left : right
allow to return left
if cond
is true
otherwise right
. (New in 3.0)
Operator | Description |
---|---|
! <expression> |
Boolean negate an expression. e.g if !page |
<expression> |
Arithmetic positive an expression. e.g 1.5 |
- <expression> |
Arithmetic negate an expression |
^ <expression> |
Expand an array passed to arguments of a function call (see function call) |
@ <expression> |
Alias the result of an expression that would be evaluated if it was a function call |
<variable> |
Increments the variable. Expression is evaluated to the value after it is incremented. |
-- <variable> |
Decrements the variable. Expression is evaluated to the value after it is decremented. |
<variable> |
Increments the variable. Expression is evaluated to the value before it is incremented. |
<variable> -- |
Decrements the variable. Expression is evaluated to the value before it is decremented. |
Note: For the increment an decrement operators, the operand must be a variable, property or indexer
They are special binary expressions that provides an iterator (used usually with the for
statement)
The evaluated left
and right
expressions must resolve to an integer at runtime.
Operator | Description |
---|---|
left..right |
Returns an iterator between left and right with a step of 1, including right . e.g: 1..5 iterates from 1 to 5 |
left..<right |
Returns an iterator between left and right with a step of 1, excluding right . e.g: 1..<5 iterates from 1 to 4 |
The operator left ?? right
can be used to return the right
value if left
is null.
The operator left ?! right
can be used to return the right
value if left
is not null.
A function can be called by passing parameters separated by a whitespace:
{{ myfunction arg1 "arg2" (1 5) }}
The pipe operator |
can also be used to pipe the result of an expression to a function:
{{ date.parse '2016/01/05' | date.to_string '%g' }}
will output 06 Jan 2016
Notice that when a function receives the result of a pipe call (e.g
date.to_string
in the example above), it is passed as the first argument of the call. This is valid for both .NET custom functions as well as for Scriban integrated functions.
Pipes are greedy with respect to whitespace. This allow them to be chained across multiple lines:
{{-
"text" |
string.append "END" |
string.prepend "START"
-}}
will output STARTtextEND
When passing multiple arguments to an existing .NET function, you may want to use named arguments.
Suppose you have declared a .NET function like this:
public static string MyProcessor(string left, string right, int count, string options = null)
{
// ...
}
You can call this function from scriban with the following syntax:
{{ my_processor "Hello" "World" count: 15 options: "optimized" }}
with a pipe we could rewrite this to:
{{ "Hello" | my_processor "World" count: 15 options: "optimized" }}
Note that once arguments are named, the following arguments must be all named.
In a custom function declared with func
named arguments are accessible through the variable arguments variable $
, but as properties (and not as part of the default array arguments):
input
{{
func my_processor
"Argument count:" $.count
"Argument options:" $["options"]
for $x in $
"arg[" $x "]: " $x
end
end
my_processor "Hello" "World" count: 15 options: "optimized"
}}
output
Argument count: 15
Argument options: optimized
arg[0]: Hello
arg[1]: World
Each statement must be terminated by a code block }}
or an EOL within a code block, or a semicolon to separate multiple statements on a single line within a code block.
An expression statement:
{{ value 1 }}
e.g Evaluates value 1
and output the result
{{
value 1 # This is a single line expression statement followed by this comment
}}
The following compound assignment operators are supported for numbers:
Operator | Description |
---|---|
<left> = <right> |
add left to right number, and assigns the result to left |
<left> -= <right> |
subtract right number from left, and assigns the result to left |
<left> *= <right> |
multiply left by right number, and assigns the result to left |
<left> /= <right> |
divide left by right number, and assigns the result to left |
<left> //= <right> |
divide left by right number and round to an integer, and assigns the result to left |
<left> %= <right> |
calculates the modulus of left by right, and assigns the result to left |
If left or right is a float and the other is an integer, the result of the operation will be a float.
Note: The left-hand side of the assignment statement must be a variable, property or indexer
The general syntax is:
{{
if <expression>
...
else if <expression>
...
else
...
end
}}
An if
statement must be closed by an end
or followed by a else
or else if
statement. An else
or else if
statement must be followed by a else
, else if
or closed by an end
statement.
An expression evaluated for a if
or else if
will be converted to a boolean.
By default, only the null
and boolean false
are considered as false
when evaluated as booleans.
The following values are used for converting literals to boolean:
0 -> true
1 -> true
or any non zero valuenull -> false
false -> false
non_null_object -> true
"" -> true
An empty string returns true"foo" -> true
Example testing a page object:
{{ if page }}Page is not null{{ else }}Page is null!{{ end }}
This is the equivalent of switch
statement in C#, a selection statement that chooses a single switch section to execute from a list of candidates based on a value matching.
case <expression>
opens a switch with an expressionwhen <match>
allows to match with the specified expression and the case expressionwhen
can also be used with multiple values separated by,
or||
- A final
else
can be used to as a default handler in case nothing matched.
input
{{
x = 5
case x
when 1, 2, 3
"Value is 1 or 2 or 3"
when 5
"Value is 5"
else
"Value is " x
end
}}
output
Value is 5
{{for <variable> in <expression>}}
...
{{end}}
The expression can be an array or a range iterator:
-
Loop on an array:
{{ for page in pages }}This is the page {{ page.title }}{{ end }}
-
Loop on a range:
{{ for x in 1..n }}This is the loop step [{{x}}]{{ end }}
The for loop (along with the tablerow
statement below) supports additional parameters, offset
, limit
and reversed
that can also be used togethers:
Allows to start the iteration of the loop at the specified zero-based index:
input
{{~ for $i in 4..9 offset:2 ~}}
{{ $i }}
{{~ end ~}}
output
6
7
8
9
Allows to limit the iteration of the loop for the specified count
input
{{~ for $i in 4..9 limit:2 ~}}
{{ $i }}
{{~ end ~}}
output
4
5
Allows to reverse the iteration on the elements
input
{{~ for $i in 1..3 reversed ~}}
{{ $i }}
{{~ end ~}}
output
3
2
1
{{while <expression>}}
...
{{end}}
Like the if
statement, the expression
is evaluated to a boolean.
This function generates HTML rows compatible with an HTML table. Must be wrapped in an opening <table>
and closing </table>
HTML tags.
This statement is mainly for compatibility reason with the liquid tablerow
tag.
It has overall the same syntax as a for
statement (supporting the same parameters).
{{tablerow <variable> in <expression>}}
...
{{end}}
input
<table>
{{~ tablerow $p in products | array.sort "title" -}}
{{ $p.title -}}
{{ end ~}}
</table>
output
<table>
<tr class="row1"><td class="col1">Apple</td></tr>
<tr class="row2"><td class="col1">Banana</td></tr>
<tr class="row3"><td class="col1">Computer</td></tr>
<tr class="row4"><td class="col1">Mobile Phone</td></tr>
<tr class="row5"><td class="col1">Orange</td></tr>
<tr class="row6"><td class="col1">Sofa</td></tr>
<tr class="row7"><td class="col1">Table</td></tr>
</table>
Defines the number of columns to output:
input
<table>
{{~ tablerow $p in (products | array.sort "title") limit: 4 cols: 2 -}}
{{ $p.title -}}
{{ end ~}}
</table>
output
<table>
<tr class="row1"><td class="col1">Apple</td><td class="col2">Banana</td></tr>
<tr class="row2"><td class="col1">Computer</td><td class="col2">Mobile Phone</td></tr>
</table>
The following variables are accessible within a for
block:
Name | Description |
---|---|
{{for.index}} |
The current index of the for loop |
{{for.rindex}} |
The current index of the for loop starting from the end of the list |
{{for.first}} |
A boolean indicating whether this is the first step in the loop |
{{for.last}} |
A boolean indicating whether this is the last step in the loop |
{{for.even}} |
A boolean indicating whether this is an even row in the loop |
{{for.odd}} |
A boolean indicating whether this is an odd row in the loop |
{{for.changed}} |
A boolean indicating whether a current value of this iteration changed from previous step |
Within a while
statement, the following variables can be used:
Name | Description |
---|---|
{{while.index}} |
The current index of the while loop |
{{while.first}} |
A boolean indicating whether this is the first step in the loop |
{{while.even}} |
A boolean indicating whether this is an even row in the loop |
{{while.odd}} |
A boolean indicating whether this is an odd row in the loop |
The break
statement allows to early exit a loop
{{ for i in 1..5
if i > 2
break
end
end }}
The continue
statement allows to skip the rest of a loop and continue on the next step
{{ for i in 1..5
if i == 2
continue
end
}}
[{{i}}]] step
{{ end }}
Will output:
[1] step
[3] step
[4] step
[5] step
The capture <variable> ... end
statement allows to capture the template output to a variable:
For example the following code:
{{ capture myvariable }}
This is the result of a capture {{ date.now }}
{{ end }}
will set myvariable = "This is the result of a capture 06 Jan 2016\n"
The readonly
statement prevents a variable for subsequent assignments:
{{ x = 1 }}
{{ readonly x }}
{{ x = 2 }} <- this will result in a runtime error
The import <variable_path>
statement allows to import the members of an object as variables of the current bound:
{{
myobject = { member1: "yes" }
import myobject
member1 # will print the "yes" string to the output
}}
Note that readonly
variables won't be override.
The with <variable> ... end
statement will open a new object context with the passed variable, all assignment will result in setting the members of the passed object.
myobject = {}
with myobject
member1 = "yes"
end
Pass a block of statements to a function that will be able to evaluate it using the special variable $$
{{
func wrapped
for $i in 1..<$0
$$ # This special variable evaluates the block pass
# to the wrap statement
end
end
wrap wrapped 5
$i " -> This is inside the wrap!\r\n"
end
}}
will output:
1 -> This is inside the wrap!
2 -> This is inside the wrap!
3 -> This is inside the wrap!
4 -> This is inside the wrap!
Note that variables declared outside the with
block are accessible within.
The include is not a statement but actually a function that allows to parse and render the specified template name. In order to use this function, a delegate to an template loader must be setup on the TemplateOptions.TemplateLoader
property passed to the Template.Parse
method.
include 'myinclude.html'
x = include 'myinclude.html'
x " modified"
assuming that myinclude.html
is
{{ y = y 1 ~}}
This is a string with the value {{ y }}
will output:
This is a string with the value 1
This is a string with the value 2 modified
The return statement is used to early exit from a top-level/include page or a function.
This is a text
{{~ ret ~}}
This text will not appear
will output:
This is a text