Enum syn::ConstExpr

pub enum ConstExpr {
    Call(Box<ConstExpr>, Vec<ConstExpr>),
    Binary(BinOp, Box<ConstExpr>, Box<ConstExpr>),
    Unary(UnOp, Box<ConstExpr>),
    Lit(Lit),
    Cast(Box<ConstExpr>, Box<Ty>),
    Path(Path),
    Index(Box<ConstExpr>, Box<ConstExpr>),
    Paren(Box<ConstExpr>),
    Other(Other),
}

Variants

Call(Box<ConstExpr>, Vec<ConstExpr>)

A function call

The first field resolves to the function itself, and the second field is the list of arguments

Binary(BinOp, Box<ConstExpr>, Box<ConstExpr>)

A binary operation (For example: a + b, a * b)

Unary(UnOp, Box<ConstExpr>)

A unary operation (For example: !x, *x)

Lit(Lit)

A literal (For example: 1, "foo")

Cast(Box<ConstExpr>, Box<Ty>)

A cast (foo as f64)

Path(Path)

Variable reference, possibly containing :: and/or type parameters, e.g. foo::bar::.

Index(Box<ConstExpr>, Box<ConstExpr>)

An indexing operation (foo[2])

Paren(Box<ConstExpr>)

No-op: used solely so we can pretty-print faithfully

Other(Other)

If compiling with full support for expression syntax, any expression is allowed

Trait Implementations

impl ToTokens for ConstExpr

fn to_tokens(&self, tokens: &mut Tokens)

Write self to the given Tokens.

impl Debug for ConstExpr

fn fmt(&self, __arg_0: &mut Formatter) -> Result

Formats the value using the given formatter.

impl Clone for ConstExpr

fn clone(&self) -> ConstExpr

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Eq for ConstExpr

impl PartialEq for ConstExpr

fn eq(&self, __arg_0: &ConstExpr) -> bool

This method tests for self and other values to be equal, and is used by ==.

fn ne(&self, __arg_0: &ConstExpr) -> bool

This method tests for !=.

impl Hash for ConstExpr

fn hash<__H: Hasher>(&self, __arg_0: &mut __H)

Feeds this value into the state given, updating the hasher as necessary.

fn hash_slice<H>(data: &[Self], state: &mut H) where H: Hasher

Feeds a slice of this type into the state provided.