Enum Value 

pub enum Value {
    Nil,
    Bool(bool),
    Int(i64),
    Float(f64),
    Str(String),
    Symbol(String),
    Keyword(String),
    Path(PathBuf),
    List(Arc<Vec<Value>>),
    Attrs(Arc<BTreeMap<String, Value>>),
    Lambda(Arc<Lambda>),
    Builtin(Arc<Builtin>),
    Thunk(Arc<Thunk>),
    Derivation(Arc<Derivation>),
    StorePath(StorePath),
    Quoted(Arc<Sexp>),
}

Every runtime value flows through this enum. Variants match a Nix-ish ontology (atoms, lists, attrsets, functions, thunks, paths, derivations) so the Lisp surface can carry Nix’s academic semantics verbatim.

Variants

Nil

Bool(bool)

Int(i64)

Float(f64)

Str(String)

Symbol(String)

Keyword(String)

Path(PathBuf)

List(Arc<Vec<Value>>)

Attrs(Arc<BTreeMap<String, Value>>)

Lambda(Arc<Lambda>)

Builtin(Arc<Builtin>)

Thunk(Arc<Thunk>)

Derivation(Arc<Derivation>)

StorePath(StorePath)

Quoted(Arc<Sexp>)

A quoted Sexp — lets Lisp programs manipulate code-as-data.

Implementations

impl Value

pub fn type_name(&self) -> &'static str

pub fn is_truthy(&self) -> bool

pub fn as_int(&self) -> Option<i64>

pub fn as_str(&self) -> Option<&str>

pub fn as_list(&self) -> Option<&[Value]>

pub fn as_attrs(&self) -> Option<&BTreeMap<String, Value>>

pub fn as_derivation(&self) -> Option<&Derivation>

pub fn as_path(&self) -> Option<&PathBuf>

pub fn coerce_to_string(&self) -> Option<String>

Coerce this value to a plain String if that’s a meaningful operation. Matches Nix’s toString semantics: strings/numbers/paths/derivations have a canonical string form; lists/attrs/lambdas do not.

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 Display for Value

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

Formats the value using the given formatter.