Args

Struct Args 

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pub struct Args {
    pub flavor: Flavor,
    /* private fields */
}
Expand description

Args 存储 SQL 相关参数。

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§flavor: Flavor

默认 flavor,用于 compile

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impl Args

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pub fn add(&mut self, arg: impl Into<Arg>) -> String

Add:追加一个参数并返回内部占位符($0/$1/...)。

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pub fn replace(&mut self, placeholder: &str, arg: impl Into<Arg>)

Replace:用新参数替换某个 $n 占位符对应的值(对齐 go-sqlbuilder Args.Replace)。

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pub fn value(&self, placeholder: &str) -> Option<&Arg>

Value:按 $<n> 前缀解析参数值(对齐 go-sqlbuilder Args.Value 的“宽松匹配”)。

  • placeholder 可以带后缀(如 "$0xxx"),只要以 $<digits> 开头就会解析。
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pub fn compile(&self, format: &str, initial_value: &[Arg]) -> (String, Vec<Arg>)

Compile:按默认 flavor 编译 format。

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pub fn compile_with_flavor( &self, format: &str, flavor: Flavor, initial_value: &[Arg], ) -> (String, Vec<Arg>)

CompileWithFlavor:编译 format,并用 flavor 输出最终占位符。

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impl Clone for Args

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fn clone(&self) -> Args

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 Args

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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 Args

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fn default() -> Self

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

Auto Trait Implementations§

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impl Freeze for Args

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impl !RefUnwindSafe for Args

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impl !Send for Args

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impl !Sync for Args

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impl Unpin for Args

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impl !UnwindSafe for Args

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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> DynClone for T
where T: Clone,

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fn __clone_box(&self, _: Private) -> *mut ()

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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<U> 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> ToOwned for T
where T: Clone,

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type Owned = T

The resulting type after obtaining ownership.
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fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more
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fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more
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impl<T, U> TryFrom<U> for T
where U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.