Enum Value 

pub enum Value {
    Uninitialized,
    Number(f64),
    String(String),
    NumericString(String, f64),
}

AWK value type with dynamic typing and automatic coercion

AWK has a unique type system where values can be strings, numbers, or “numeric strings” (strings that look like numbers). This enum captures all three cases.

Examples

use awk_rs::Value;

// Numbers
let num = Value::Number(42.0);
assert_eq!(num.to_number(), 42.0);
assert_eq!(num.to_string_val(), "42");

// Strings
let s = Value::from_string("hello".to_string());
assert_eq!(s.to_string_val(), "hello");
assert_eq!(s.to_number(), 0.0);  // Non-numeric string coerces to 0

// Numeric strings
let ns = Value::from_string("123".to_string());
assert_eq!(ns.to_number(), 123.0);
assert_eq!(ns.to_string_val(), "123");

// Truthiness
assert!(Value::Number(1.0).is_truthy());
assert!(!Value::Number(0.0).is_truthy());
assert!(Value::from_string("hello".to_string()).is_truthy());
assert!(!Value::from_string("".to_string()).is_truthy());

Variants

Uninitialized

Uninitialized value - coerces to “” or 0 depending on context

Number(f64)

Numeric value

String(String)

String value

NumericString(String, f64)

Numeric string - a string that looks like a number (used for comparison semantics)

Implementations

impl Value

pub fn from_string(s: String) -> Self

Create a new string value, detecting if it’s a numeric string

pub fn from_number(n: f64) -> Self

Create a numeric value

pub fn is_truthy(&self) -> bool

Check if this value is “true” in boolean context

• Uninitialized is false
• Number 0 is false
• Empty string is false
• Everything else is true

pub fn to_number(&self) -> f64

Coerce to numeric value

pub fn to_string_val(&self) -> String

Coerce to string value

pub fn as_str(&self) -> Cow<'_, str>

Get string as Cow to avoid allocation when possible

pub fn to_string_with_format(&self, format: &str) -> String

Coerce to string with specific format (for OFMT/CONVFMT)

pub fn is_numeric(&self) -> bool

Check if this value is definitely numeric

pub fn is_numeric_string(&self) -> bool

Check if this value is a numeric string

pub fn compares_as_number(&self) -> bool

Check if this value should compare as a number

Trait Implementations

impl Clone for Value

fn clone(&self) -> Value

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for Value

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for Value

fn default() -> Value

Returns the “default value” for a type.

impl Display for Value

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.