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Mutate an NA or NULL literal

na_literal.Rd

Replaces NA, NULL, or a typed NA constant (NA_real_, NA_integer_, NA_complex_, NA_character_) with another value.

Usage

na_literal(from, to)

Arguments

from

The literal to replace. One of "NA", "NULL", "NA_real_", "NA_integer_", "NA_complex_", "NA_character_".

to

The replacement literal.

Value

A Mutator object.

Details

In tree-sitter-r, NA and all typed NA variants share the same na node type, while NULL has its own null node type. match_fn distinguishes between them by comparing the literal text.

Examples

na_literal("NULL", "NA")
#> Mutator: NULL → NA
#> Query: (null) @value
na_literal("NA", "NULL")
#> Mutator: NA → NULL
#> Query: (na) @value
na_literal("NA", "NA_real_")
#> Mutator: NA → NA_real_
#> Query: (na) @value
na_literal("NA_real_", "NA")
#> Mutator: NA_real_ → NA
#> Query: (na) @value