ItemExpression.From

Επιστρέφει το αφηρημένο δέντρο σύνταξης (AST) για το σώμα μιας συνάρτησης.

Syntax

ItemExpression.From(
    function as function
) as record

Remarks

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.

Examples

Example #1

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

ItemExpression.From(each _ <> null)

Result:

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

Category

Table.Table construction