ItemExpression.From

Syntax

ItemExpression.From(function as function) as record

About

Returns the AST for the body of function, normalized into an item expression:

  • The function must be a 1-argument lambda.
  • All references to the function parameter are replaced with ItemExpression.Item.
  • The AST will be simplified to contain only nodes of the kinds:
    • Constant
    • Invocation
    • Unary
    • Binary
    • If
    • FieldAccess
    • NotImplemented

An error is raised if an item expression AST cannot be returned for the body of function.

Example 1

Returns the AST for the body of the function each _ <> null

ItemExpression.From(each _ <> null)

[ Kind = "Binary", Operator = "NotEquals", Left = ItemExpression.Item, Right = [ Kind = "Constant", Value = null ] ]