Double

Creates a double from PerlScalar. Throws if sv contains something that not looks like a number.

let i = try Double(PerlScalar(42.3))     // i == 42.3
let i = try Double(PerlScalar("42.3"))   // i == 42.3
let i = try Double(PerlScalar())         // throws
let i = try Double(PerlScalar(""))       // throws
let i = try Double(PerlScalar("any"))    // throws
let i = try Double(PerlScalar("50sec"))  // throws

Creates a double from PerlScalar using Perl macros SvNV. Performs no additional checks.

let i = Double(unchecked: PerlScalar(42.3))        // i == 42.3
let i = Double(unchecked: PerlScalar("42.3"))      // i == 42.3
let i = Double(unchecked: PerlScalar())            // i == 0
let i = Double(unchecked: PerlScalar(""))          // i == 0
let i = Double(unchecked: PerlScalar("any"))       // i == 0
let i = Double(unchecked: PerlScalar("50sec"))     // i == 50
let i = Double(unchecked: PerlScalar("50.3sec"))   // i == 50.3