Enum gumdrop::ParsingStyle
source · [−]pub enum ParsingStyle {
AllOptions,
StopAtFirstFree,
}
Expand description
Controls behavior of free arguments in Parser
The parse_args_default
and parse_args_default_or_exit
functions will use the
default parsing style, AllOptions
.
Examples
use gumdrop::{Options, ParsingStyle};
#[derive(Options)]
struct MyOptions {
// If the "-o" is parsed as an option, this will be `true`.
option: bool,
// All free (non-option) arguments will be collected into this Vec.
#[options(free)]
free: Vec<String>,
}
// Command line arguments.
let args = &["foo", "-o", "bar"];
// Using the `AllOptions` parsing style, the "-o" argument in the middle of args
// will be parsed as an option.
let opts = MyOptions::parse_args(args, ParsingStyle::AllOptions).unwrap();
assert_eq!(opts.option, true);
assert_eq!(opts.free, vec!["foo", "bar"]);
// Using the `StopAtFirstFree` option, the first non-option argument will terminate
// option parsing. That means "-o" is treated as a free argument.
let opts = MyOptions::parse_args(args, ParsingStyle::StopAtFirstFree).unwrap();
assert_eq!(opts.option, false);
assert_eq!(opts.free, vec!["foo", "-o", "bar"]);
Variants
AllOptions
Process all option arguments that appear
StopAtFirstFree
After the first “free” argument is encountered, all remaining arguments will be considered “free” arguments.
Trait Implementations
sourceimpl Clone for ParsingStyle
impl Clone for ParsingStyle
sourcefn clone(&self) -> ParsingStyle
fn clone(&self) -> ParsingStyle
Returns a copy of the value. Read more
1.0.0 · sourcefn clone_from(&mut self, source: &Self)
fn clone_from(&mut self, source: &Self)
Performs copy-assignment from source
. Read more
sourceimpl Debug for ParsingStyle
impl Debug for ParsingStyle
sourceimpl Default for ParsingStyle
impl Default for ParsingStyle
sourcefn default() -> ParsingStyle
fn default() -> ParsingStyle
Returns the default parsing style, AllOptions
.
sourceimpl PartialEq<ParsingStyle> for ParsingStyle
impl PartialEq<ParsingStyle> for ParsingStyle
impl Copy for ParsingStyle
impl Eq for ParsingStyle
impl StructuralEq for ParsingStyle
impl StructuralPartialEq for ParsingStyle
Auto Trait Implementations
impl RefUnwindSafe for ParsingStyle
impl Send for ParsingStyle
impl Sync for ParsingStyle
impl Unpin for ParsingStyle
impl UnwindSafe for ParsingStyle
Blanket Implementations
sourceimpl<T> BorrowMut<T> for T where
T: ?Sized,
impl<T> BorrowMut<T> for T where
T: ?Sized,
const: unstable · sourcefn borrow_mut(&mut self) -> &mut T
fn borrow_mut(&mut self) -> &mut T
Mutably borrows from an owned value. Read more
sourceimpl<T> ToOwned for T where
T: Clone,
impl<T> ToOwned for T where
T: Clone,
type Owned = T
type Owned = T
The resulting type after obtaining ownership.
sourcefn clone_into(&self, target: &mut T)
fn clone_into(&self, target: &mut T)
🔬 This is a nightly-only experimental API. (
toowned_clone_into
)Uses borrowed data to replace owned data, usually by cloning. Read more