lang.md

Language

Templating language used in ytt is a slightly modified version of Starlark. Following modifications were made:

• requires end keyword for block closing
  • hence no longer whitespace sensitive (except new line breaks)
• does not allow use of pass keyword

Reference

Types

• NoneType: None (equivalent to null in other languages)
• Bool: True or False
• Integer: 1
• Float: 1.1
• String: "string" Reference
• Dictionary: {"a": 1, "b": "b"} Reference
• List: [1, 2, {"a":3}] Reference
• Tuple: (1, 2, "a")
• Struct: struct.make(field1=123, field2="val2") Reference
• TODO Set?
• TODO YAMLFragment?
• Annotation: @name arg1,arg2,keyword_arg3=123 Reference

Control flow

• If conditional
• For loop
• Function

Libraries

• @ytt Library
  • @ytt:overlay module
  • @ytt:library module