Module as_numeric 

AsNumeric / AsNumericVec: a number argument read the way R’s as.numeric() reads it, from numbers, text, or factor labels. The reading rules are documented on AsNumericVec.

Structs

AsNumeric

A numeric scalar read like R’s as.numeric(): from a double, integer, logical, character, or factor (by its labels) of length 1. NA of any type is None.

AsNumericVec

A numeric vector read like R’s as.numeric(): from a double, integer, logical, character, or factor (by its labels) vector. NA of any type is None.

NotNumeric 🔒

A value that as.numeric() would turn into NA with a coercion warning.

Functions

check_type 🔒

Refuse every SEXPTYPE the markers do not read. REALSXP is named as the expected type because that is the storage the value ends up in.

finish 🔒

Return the values, or the one batched error naming every rejected element.

is_blank 🔒

R’s isBlankString: empty, or only blank characters.

is_blank_char 🔒

Whether c counts as blank for R’s isBlankString, which uses iswspace in a UTF-8 locale: Unicode whitespace except NEL (U+0085) and the no-break spaces U+00A0, U+2007 and U+202F, which neither glibc nor macOS classes as space.

is_na_token 🔒

The missing-value token "NA", with blanks around it at most.

level_label 🔒

The text of level k (0-based) of a factor’s levels STRSXP.

parse_charsxp 🔒

Parse one CHARSXP the way as.numeric() does.

parse_nul_terminated 🔒 ^⚠

Parse s as R’s RealFromString does, plus the "NA" token.

read_factor_labels 🔒

Read a factor by its labels: each level is parsed once, then every code looks its level up. Code NA is None; a code outside the levels is a malformed factor (R’s as.character() refuses it too).

read_numeric 🔒

Read any accepted input into Vec<Option<f64>>, collecting every non-numeric element into one error.

refused_by_no_na 🔒

Whether #[miniextendr(no_na)] refuses a value the markers read: None (every kind of NA, the text "NA", a blank string) and NaN (also read from the text "NaN"), as R’s anyNA() refuses a numeric NaN.

rest_is_blank 🔒

Whether the bytes R_strtod left unread are blank. They follow an ASCII prefix of a valid UTF-8 string, so a failed UTF-8 check only happens for a split multi-byte character, which is not blank either.

Type Aliases

Rejected 🔒

The rejected-element accumulator: 0-based index and the offending text.