Enum NArgs 

#[non_exhaustive]
pub enum NArgs {
    Fixed(usize),
    ZeroOrMore,
    OneOrMore,
    Optional,
    AtLeast(usize),
}

How many arguments a positional slot or keyword takes.

In TOML this can be written as:

• integer nargs = 1 → Fixed(1)
• "*" → ZeroOrMore
• "+" → OneOrMore
• "?" → Optional
• "N+" e.g. "2+" → AtLeast(2)

Variants (Non-exhaustive)

Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.

Fixed(usize)

Exactly n positional arguments. Fixed(0) means a keyword-only marker (no values of its own).

ZeroOrMore

Zero or more positional arguments — the keyword may appear alone or be followed by any number of values until the next sibling keyword. The default.

OneOrMore

One or more positional arguments. CMake requires at least one value; the splitter force-consumes the first value regardless of token classification so a value that spells a sibling keyword name is still captured.

Optional

Either zero or one positional argument.

AtLeast(usize)

At least n positional arguments; additional values are consumed until the next sibling keyword.

Trait Implementations

impl Clone for NArgs

fn clone(&self) -> NArgs

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for NArgs

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

Formats the value using the given formatter.

impl Default for NArgs

fn default() -> NArgs

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for NArgs

fn deserialize<D: Deserializer<'de>>(d: D) -> Result<Self, D::Error>

Deserialize this value from the given Serde deserializer.

impl Eq for NArgs

impl PartialEq for NArgs

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

Tests for self and other values to be equal, and is used by ==.

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Serialize for NArgs

fn serialize<S: Serializer>(&self, serializer: S) -> Result<S::Ok, S::Error>

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for NArgs