Method in macro · Expr compiler

`Expr::float`

pub fn float() -> Option<float>

Import

use macro::{Expr};

The value of a float constant (2.5, -1.0e3), or of an integer one.

Called on a Expr value as value.float(…).

Returns#

Option<float>

Expr: A function-style macro argument as written: f(1), a + b, "text".
Expr::str: The source text as written.
Expr::src: The source to splice: parenthesized unless it is a single term, so ${a} * 2 keeps a whole.
Expr::kind
Expr::is_literal
Expr::is_ident
Expr::int: The argument’s value when it is an integer constant: 3, -2, 2 * 21.
Expr::bool: The value of a true / false constant.