Struct MacEager 

pub struct MacEager {
    pub expr: Option<Box<Expr>>,
    pub items: Option<SmallVec<[Box<Item>; 1]>>,
    pub ty: Option<Box<Ty>>,
}

MacResult implementation for the common case where you’ve already built each form of AST that you might return.

Fields

expr: Option<Box<Expr>>

items: Option<SmallVec<[Box<Item>; 1]>>

ty: Option<Box<Ty>>

Implementations

impl MacEager

pub fn expr(v: Box<Expr>) -> Box<dyn MacResult>

pub fn items(v: SmallVec<[Box<Item>; 1]>) -> Box<dyn MacResult>

pub fn ty(v: Box<Ty>) -> Box<dyn MacResult>

Trait Implementations

impl Default for MacEager

fn default() -> MacEager

Returns the “default value” for a type.

impl MacResult for MacEager

fn make_expr(self: Box<Self>) -> Option<Box<Expr>>

Creates an expression.

fn make_items(self: Box<Self>) -> Option<SmallVec<[Box<Item>; 1]>>

Creates zero or more items.

fn make_pat(self: Box<Self>) -> Option<Box<Pat>>

Creates a pattern.

fn make_ty(self: Box<Self>) -> Option<Box<Ty>>

fn make_impl_items(self: Box<Self>) -> Option<SmallVec<[Box<AssocItem>; 1]>>

Creates zero or more impl items.

fn make_trait_impl_items( self: Box<Self>, ) -> Option<SmallVec<[Box<AssocItem>; 1]>>

Creates zero or more impl items.

fn make_trait_items(self: Box<Self>) -> Option<SmallVec<[Box<AssocItem>; 1]>>

Creates zero or more trait items.

fn make_foreign_items( self: Box<Self>, ) -> Option<SmallVec<[Box<ForeignItem>; 1]>>

Creates zero or more items in an extern {} block

fn make_stmts(self: Box<Self>) -> Option<SmallVec<[Stmt; 1]>>

Creates zero or more statements.

fn make_arms(self: Box<Self>) -> Option<SmallVec<[Arm; 1]>>

fn make_expr_fields(self: Box<Self>) -> Option<SmallVec<[ExprField; 1]>>

fn make_pat_fields(self: Box<Self>) -> Option<SmallVec<[PatField; 1]>>

fn make_generic_params(self: Box<Self>) -> Option<SmallVec<[GenericParam; 1]>>

fn make_params(self: Box<Self>) -> Option<SmallVec<[Param; 1]>>

fn make_field_defs(self: Box<Self>) -> Option<SmallVec<[FieldDef; 1]>>

fn make_variants(self: Box<Self>) -> Option<SmallVec<[Variant; 1]>>

fn make_where_predicates( self: Box<Self>, ) -> Option<SmallVec<[WherePredicate; 1]>>

fn make_crate(self: Box<Self>) -> Option<Crate>

Layout

Note: Most layout information is completely unstable and may even differ between compilations. The only exception is types with certain repr(...) attributes. Please see the Rust Reference's “Type Layout” chapter for details on type layout guarantees.

Size: 48 bytes