Unary (Unary Operation)

Definition

Unary { op :: Text, arg :: Expr }

Field	Type	Description
`op`	`Text`	Operator symbol (`-` or `!`)
`arg`	`Expr`	Operand expression

See Operators for the full list of unary operators.

# Nix
-x

# AST
{
  "tag": "Unary",
  "op": "-",
  "arg": { "tag": "Sym", "contents": "x" }
}

# Nix
!cond

# AST
{
  "tag": "Unary",
  "op": "!",
  "arg": { "tag": "Sym", "contents": "cond" }
}

syntax.mkUnary "-" (syntax.mkSym "x")
syntax.mkUnary "!" (syntax.mkSym "cond")