axion_data::io::csv

Enum QuoteStyle

pub enum QuoteStyle {
    Always,
    Necessary,
    Never,
    NonNumeric,
}

Expand description

CSV 引用样式

控制 CSV 写入时字段的引号使用策略。

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Always

总是为所有字段加上引号

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Necessary

仅在字段包含分隔符、引号或换行符时加上引号（默认）

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Never

从不为字段加上引号（如果字段包含特殊字符，可能导致 CSV 格式无效）

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NonNumeric

仅为非数字字段加上引号

Trait Implementations§

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impl Clone for QuoteStyle

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fn clone(&self) -> QuoteStyle

Returns a duplicate of the value. Read more

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

Performs copy-assignment from source. Read more

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impl Debug for QuoteStyle

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

Formats the value using the given formatter. Read more

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impl Default for QuoteStyle

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fn default() -> QuoteStyle

Returns the “default value” for a type. Read more

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impl PartialEq for QuoteStyle

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

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

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

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

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impl Eq for QuoteStyle

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impl StructuralPartialEq for QuoteStyle

Auto Trait Implementations§

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impl UnwindSafe for QuoteStyle

Blanket Implementations§

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impl<T> Any for T
where T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more

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impl<T> Borrow<T> for T
where T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more

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impl<T> BorrowMut<T> for T
where T: ?Sized,

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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more

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impl<T> CloneToUninit for T
where T: Clone,

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unsafe fn clone_to_uninit(&self, dest: *mut u8)

🔬This is a nightly-only experimental API. (clone_to_uninit)

Performs copy-assignment from self to dest. Read more

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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T, U> Into for T
where U: From<T>,

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fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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impl<T> IntoEither for T

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fn into_either(self, into_left: bool) -> Either<Self, Self>

Converts self into a Left variant of Either<Self, Self> if into_left is true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more

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fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>
where F: FnOnce(&Self) -> bool,

Converts self into a Left variant of Either<Self, Self> if into_left(&self) returns true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more

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