Enum UnOp 

pub enum UnOp {
    Not,
    Neg,
    BitNot,
    Plus,
}

Variants

Not

Neg

BitNot

Bitwise NOT ~ on integers.

Plus

v7.39 (round 507) — unary +. SPG had no such operator at all: SELECT +1 parsed only because the lexer reads +1 as one signed literal, so + 1, +a, +(1) and 1 + +1 were all syntax errors while PG18 and MariaDB accept every one of them.

It is not a no-op to drop at parse time — PG refuses it on non-numeric operands (“operator does not exist: + boolean”), so the operand’s type has to be seen at eval.

Trait Implementations

impl Clone for UnOp

fn clone(&self) -> UnOp

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for UnOp

impl Debug for UnOp

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

Formats the value using the given formatter.

impl Eq for UnOp

impl PartialEq for UnOp

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for UnOp