108 lines
3.6 KiB
Rust
108 lines
3.6 KiB
Rust
// Copyright 2014 The Rust Project Developers. See the COPYRIGHT
|
|
// file at the top-level directory of this distribution and at
|
|
// http://rust-lang.org/COPYRIGHT.
|
|
//
|
|
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
|
|
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
|
|
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
|
|
// option. This file may not be copied, modified, or distributed
|
|
// except according to those terms.
|
|
|
|
// Checks that all rvalues in a crate have statically known size. check_crate
|
|
// is the public starting point.
|
|
|
|
use rustc::dep_graph::DepNode;
|
|
use rustc::middle::expr_use_visitor as euv;
|
|
use rustc::middle::mem_categorization as mc;
|
|
use rustc::ty::{self, TyCtxt, ParameterEnvironment};
|
|
use rustc::traits::ProjectionMode;
|
|
|
|
use rustc::hir;
|
|
use rustc::hir::intravisit;
|
|
use syntax::ast;
|
|
use syntax_pos::Span;
|
|
|
|
pub fn check_crate<'a, 'tcx>(tcx: TyCtxt<'a, 'tcx, 'tcx>) {
|
|
let mut rvcx = RvalueContext { tcx: tcx };
|
|
tcx.visit_all_items_in_krate(DepNode::RvalueCheck, &mut rvcx);
|
|
}
|
|
|
|
struct RvalueContext<'a, 'tcx: 'a> {
|
|
tcx: TyCtxt<'a, 'tcx, 'tcx>,
|
|
}
|
|
|
|
impl<'a, 'tcx, 'v> intravisit::Visitor<'v> for RvalueContext<'a, 'tcx> {
|
|
fn visit_fn(&mut self,
|
|
fk: intravisit::FnKind<'v>,
|
|
fd: &'v hir::FnDecl,
|
|
b: &'v hir::Block,
|
|
s: Span,
|
|
fn_id: ast::NodeId) {
|
|
// FIXME (@jroesch) change this to be an inference context
|
|
let param_env = ParameterEnvironment::for_item(self.tcx, fn_id);
|
|
self.tcx.infer_ctxt(None, Some(param_env.clone()),
|
|
ProjectionMode::AnyFinal).enter(|infcx| {
|
|
let mut delegate = RvalueContextDelegate {
|
|
tcx: infcx.tcx,
|
|
param_env: ¶m_env
|
|
};
|
|
let mut euv = euv::ExprUseVisitor::new(&mut delegate, &infcx);
|
|
euv.walk_fn(fd, b);
|
|
});
|
|
intravisit::walk_fn(self, fk, fd, b, s)
|
|
}
|
|
}
|
|
|
|
struct RvalueContextDelegate<'a, 'gcx: 'a+'tcx, 'tcx: 'a> {
|
|
tcx: TyCtxt<'a, 'gcx, 'tcx>,
|
|
param_env: &'a ty::ParameterEnvironment<'gcx>,
|
|
}
|
|
|
|
impl<'a, 'gcx, 'tcx> euv::Delegate<'tcx> for RvalueContextDelegate<'a, 'gcx, 'tcx> {
|
|
fn consume(&mut self,
|
|
_: ast::NodeId,
|
|
span: Span,
|
|
cmt: mc::cmt<'tcx>,
|
|
_: euv::ConsumeMode) {
|
|
debug!("consume; cmt: {:?}; type: {:?}", *cmt, cmt.ty);
|
|
let ty = self.tcx.lift_to_global(&cmt.ty).unwrap();
|
|
if !ty.is_sized(self.tcx.global_tcx(), self.param_env, span) {
|
|
span_err!(self.tcx.sess, span, E0161,
|
|
"cannot move a value of type {0}: the size of {0} cannot be statically determined",
|
|
ty);
|
|
}
|
|
}
|
|
|
|
fn matched_pat(&mut self,
|
|
_matched_pat: &hir::Pat,
|
|
_cmt: mc::cmt,
|
|
_mode: euv::MatchMode) {}
|
|
|
|
fn consume_pat(&mut self,
|
|
_consume_pat: &hir::Pat,
|
|
_cmt: mc::cmt,
|
|
_mode: euv::ConsumeMode) {
|
|
}
|
|
|
|
fn borrow(&mut self,
|
|
_borrow_id: ast::NodeId,
|
|
_borrow_span: Span,
|
|
_cmt: mc::cmt,
|
|
_loan_region: ty::Region,
|
|
_bk: ty::BorrowKind,
|
|
_loan_cause: euv::LoanCause) {
|
|
}
|
|
|
|
fn decl_without_init(&mut self,
|
|
_id: ast::NodeId,
|
|
_span: Span) {
|
|
}
|
|
|
|
fn mutate(&mut self,
|
|
_assignment_id: ast::NodeId,
|
|
_assignment_span: Span,
|
|
_assignee_cmt: mc::cmt,
|
|
_mode: euv::MutateMode) {
|
|
}
|
|
}
|