bjoernager/rust
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Use ThinVec in various AST types.

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This commit changes the sequence parsers to produce `ThinVec`, which
triggers numerous conversions.
This commit is contained in:
Nicholas Nethercote 2022-11-23 11:55:16 +11:00
parent 6a56c3a930
commit 4143b101f9
52 changed files with 355 additions and 292 deletions
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14
compiler/rustc_builtin_macros/src/global_allocator.rs
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@ -9,7 +9,7 @@ use rustc_ast::{Fn, ItemKind, Mutability, Stmt, Ty, TyKind, Unsafe};
use rustc_expand::base::{Annotatable, ExtCtxt};
use rustc_span::symbol::{kw, sym, Ident, Symbol};
use rustc_span::Span;
use thin_vec::thin_vec;
use thin_vec::{thin_vec, ThinVec};
pub fn expand(
ecx: &mut ExtCtxt<'_>,
@ -47,7 +47,7 @@ pub fn expand(
let stmts = ALLOCATOR_METHODS.iter().map(|method| f.allocator_fn(method)).collect();
// Generate anonymous constant serving as container for the allocator methods.
let const_ty = ecx.ty(ty_span, TyKind::Tup(Vec::new()));
let const_ty = ecx.ty(ty_span, TyKind::Tup(ThinVec::new()));
let const_body = ecx.expr_block(ecx.block(span, stmts));
let const_item = ecx.item_const(span, Ident::new(kw::Underscore, span), const_ty, const_body);
let const_item = if is_stmt {
@ -70,7 +70,7 @@ struct AllocFnFactory<'a, 'b> {
impl AllocFnFactory<'_, '_> {
fn allocator_fn(&self, method: &AllocatorMethod) -> Stmt {
let mut abi_args = Vec::new();
let mut abi_args = ThinVec::new();
let mut i = 0;
let mut mk = || {
let name = Ident::from_str_and_span(&format!("arg{}", i), self.span);
@ -99,7 +99,7 @@ impl AllocFnFactory<'_, '_> {
self.cx.stmt_item(self.ty_span, item)
}
fn call_allocator(&self, method: Symbol, mut args: Vec<P<Expr>>) -> P<Expr> {
fn call_allocator(&self, method: Symbol, mut args: ThinVec<P<Expr>>) -> P<Expr> {
let method = self.cx.std_path(&[sym::alloc, sym::GlobalAlloc, method]);
let method = self.cx.expr_path(self.cx.path(self.ty_span, method));
let allocator = self.cx.path_ident(self.ty_span, self.global);
@ -117,7 +117,7 @@ impl AllocFnFactory<'_, '_> {
fn arg_ty(
&self,
ty: &AllocatorTy,
args: &mut Vec<Param>,
args: &mut ThinVec<Param>,
ident: &mut dyn FnMut() -> Ident,
) -> P<Expr> {
match *ty {
@ -134,7 +134,7 @@ impl AllocFnFactory<'_, '_> {
let layout_new = self.cx.expr_path(self.cx.path(self.span, layout_new));
let size = self.cx.expr_ident(self.span, size);
let align = self.cx.expr_ident(self.span, align);
let layout = self.cx.expr_call(self.span, layout_new, vec![size, align]);
let layout = self.cx.expr_call(self.span, layout_new, thin_vec![size, align]);
layout
}
@ -168,7 +168,7 @@ impl AllocFnFactory<'_, '_> {
(self.ptr_u8(), expr)
}
AllocatorTy::Unit => (self.cx.ty(self.span, TyKind::Tup(Vec::new())), expr),
AllocatorTy::Unit => (self.cx.ty(self.span, TyKind::Tup(ThinVec::new())), expr),
AllocatorTy::Layout | AllocatorTy::Usize | AllocatorTy::Ptr => {
panic!("can't convert `AllocatorTy` to an output")