Enum syn::ConstExpr

[+] Show declaration

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>)

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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>)

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

Unary(UnOp, Box<ConstExpr>)

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

Lit(Lit)

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

Cast(Box<ConstExpr>, Box<Ty>)

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A cast (foo as f64)

Path(Path)

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

Index(Box<ConstExpr>, Box<ConstExpr>)

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An indexing operation (foo[2])

Paren(Box<ConstExpr>)

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

Other(Other)

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

Trait Implementations

impl ToTokens for ConstExpr

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

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Write self to the given Tokens.

impl Debug for ConstExpr

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

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Formats the value using the given formatter.

impl Clone for ConstExpr

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fn clone(&self) -> ConstExpr

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Returns a copy of the value.

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

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Performs copy-assignment from source.

impl Eq for ConstExpr

impl PartialEq for ConstExpr

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

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

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

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This method tests for !=.

impl Hash for ConstExpr

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

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Feeds this value into the given [Hasher].

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

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Feeds a slice of this type into the given [Hasher].