107 lines
3.4 KiB
Rust
107 lines
3.4 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 middle::expr_use_visitor as euv;
|
|
use middle::infer;
|
|
use middle::mem_categorization as mc;
|
|
use middle::ty::ParameterEnvironment;
|
|
use middle::ty;
|
|
|
|
use syntax::ast;
|
|
use syntax::codemap::Span;
|
|
use syntax::visit;
|
|
|
|
pub fn check_crate(tcx: &ty::ctxt,
|
|
krate: &ast::Crate) {
|
|
let mut rvcx = RvalueContext { tcx: tcx };
|
|
visit::walk_crate(&mut rvcx, krate);
|
|
}
|
|
|
|
struct RvalueContext<'a, 'tcx: 'a> {
|
|
tcx: &'a ty::ctxt<'tcx>,
|
|
}
|
|
|
|
impl<'a, 'tcx, 'v> visit::Visitor<'v> for RvalueContext<'a, 'tcx> {
|
|
fn visit_fn(&mut self,
|
|
fk: visit::FnKind<'v>,
|
|
fd: &'v ast::FnDecl,
|
|
b: &'v ast::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);
|
|
let infcx = infer::new_infer_ctxt(self.tcx,
|
|
&self.tcx.tables,
|
|
Some(param_env.clone()),
|
|
false);
|
|
let mut delegate = RvalueContextDelegate { tcx: self.tcx, param_env: ¶m_env };
|
|
let mut euv = euv::ExprUseVisitor::new(&mut delegate, &infcx);
|
|
euv.walk_fn(fd, b);
|
|
}
|
|
visit::walk_fn(self, fk, fd, b, s)
|
|
}
|
|
}
|
|
|
|
struct RvalueContextDelegate<'a, 'tcx: 'a> {
|
|
tcx: &'a ty::ctxt<'tcx>,
|
|
param_env: &'a ty::ParameterEnvironment<'a,'tcx>,
|
|
}
|
|
|
|
impl<'a, 'tcx> euv::Delegate<'tcx> for RvalueContextDelegate<'a, 'tcx> {
|
|
fn consume(&mut self,
|
|
_: ast::NodeId,
|
|
span: Span,
|
|
cmt: mc::cmt<'tcx>,
|
|
_: euv::ConsumeMode) {
|
|
debug!("consume; cmt: {:?}; type: {:?}", *cmt, cmt.ty);
|
|
if !cmt.ty.is_sized(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",
|
|
cmt.ty);
|
|
}
|
|
}
|
|
|
|
fn matched_pat(&mut self,
|
|
_matched_pat: &ast::Pat,
|
|
_cmt: mc::cmt,
|
|
_mode: euv::MatchMode) {}
|
|
|
|
fn consume_pat(&mut self,
|
|
_consume_pat: &ast::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) {
|
|
}
|
|
}
|