ItemExpression.From

Syntax

ItemExpression.From(function as function) as record

About

Returns the abstract syntax tree (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

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

This function is identical to RowExpression.From.

Example

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

Usage

ItemExpression.From(each _ <> null)

Output

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