The Dyvil Property Format

The Dyvil Property Format

The Dyvil Property Format is a JSON-like text-based configuration file format mainly designed for the Dyvil Window Toolkit. The format is based on two fundamental concepts: Nodes and Properties. Nodes allow you to change the properties of an existing value, while properties let you assign a value to a key.

Values

Values provide the atomic building parts of the Dyvil Property Format. There are seven types of values in the format, all of which behave exactly the same as in Dyvil itself.
  • Identifiers
name = dyvil
package = test
// including booleans
visible = true
enabled = false
  • Integers
int10 = 123
int16 = 0xCAFEBABE
int2 = 0b1010
int8 = 0o7712
  • Floats
float = 0.123
float = 0.123F
float = 0.123D
float = 2e10F
  • Strings
string = "Hello World"
string = 'c'
string = "\n\n"
  • Lists
list = [ 1, 2, 3 ]
list = [ "a", [ "nested, "list" ] ]
  • Maps
map = { "a" : "A", "b" : "B" }
map = { name : "map", type : map, size : 3 }

Nodes

Nodes represent existing values, and the block in a node expression contains more nodes and properties which are meant to be applied to the node head.
gui { // <- node head
window {
width = 500
height = 300
}
}
The window property is retrieved from the gui root property, and the width and height properties of the window property is assigned in the nested block. Putting this example in the Dyvil perspective, it is equivalent to the following code:
GUI gui = ...
Window window = gui.window
window.width = 500
window.height = 300

Properties

Properties are simple assignments of values to keys. They can only be used within nodes or builder blocks and are dependant on the context in which they occur. In the above example, width = 500 and height = 300 represent the properties width and height with their corresponding values.

Node Access

Node Access Expressions allow flattening the node structure. For example,
gui {
window {
width = 500
height = 300
}
}
Can be simplified to
gui.window {
width = 500
height = 300
}
Or even
gui.window.width = 500
gui.window.height = 300
Analogously, any Node Access Expression can be converted to a slightly more verbose Node:
library.version = "1.0.0"
library { version = "1.0.0" }

Builders

Builders are a special form of values. They could be described as constructors in Dyvil terms, but have a much more elegant syntax.
button = Button {
text = "Click Me"
}
In the above example, Button represents a builder for the Button type. All properties in the block are applied to the newly created Button object. The code is the Dyvil Property Format equivalent of the Dyvil code
button = new Button
button.text = "Click Me"
Builders can also use parenthesis to shorten the constructor. As with method calls in Dyvil, the parameter names may also be stated explicitly:
color = Color(255, 255, 255)
color = Color(r: 255, g: 127, b: 127)
Furthermore, it is possible to mix parenthesis with blocks:
button = Button(text: "Click Me") {
visible = false
}
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The Dyvil Property Format
Values
Nodes
Properties
Node Access
Builders