Indicate if this expression is a basic (non-regex) unaliased column

Description

Indicate if this expression is a basic (non-regex) unaliased column

Usage

<Expr>$meta$is_column()

Value

A logical value.

Examples

library("polars")

e <- pl$col("foo")
e$meta$is_column()

#> [1] TRUE

e <- pl$col("foo") * pl$col("bar")
e$meta$is_column()

#> [1] FALSE

e <- pl$col("^col\\.*\\d+$")
e$meta$is_column()

#> [1] FALSE