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Factor out build_environment's code to find a variable in a function context.

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This commit is contained in:
Michael Sullivan 2011-06-23 15:06:04 -07:00
parent 759317ca8b
commit 53c4cb6a2f
1 changed files with 24 additions and 18 deletions
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42
src/comp/middle/trans.rs
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@ -4556,6 +4556,29 @@ fn collect_upvars(&@block_ctxt cx, &ast::block bloc,
ret result;
}
// Finds the ValueRef associated with a variable in a function
// context. It checks locals, upvars, and args.
fn find_variable(&@fn_ctxt fcx, ast::node_id nid) -> ValueRef {
ret
alt (fcx.lllocals.find(nid)) {
case (none) {
alt (fcx.llupvars.find(nid)) {
case (none) {
alt (fcx.llargs.find(nid)) {
case (some(?llval)) { llval }
case (_) {
fcx.lcx.ccx.sess.bug("unbound var \
in build_environment " + int::str(nid))
}
}
}
case (some(?llval)) { llval }
}
}
case (some(?llval)) { llval }
}
}
// Given a block context and a list of upvars, construct a closure that
// contains pointers to all of the upvars and all of the tydescs in
// scope. Return the ValueRef and TypeRef corresponding to the closure.
@ -4575,24 +4598,7 @@ fn build_environment(&@block_ctxt cx, &ast::node_id[] upvars) ->
llbindingtys += ~[val_ty(llbindings.(0))];
}
for (ast::node_id nid in upvars) {
auto llbinding;
alt (cx.fcx.lllocals.find(nid)) {
case (none) {
alt (cx.fcx.llupvars.find(nid)) {
case (none) {
alt (cx.fcx.llargs.find(nid)) {
case (some(?x)) { llbinding = x; }
case (_) {
cx.fcx.lcx.ccx.sess.bug("unbound var \
in build_environment " + int::str(nid));
}
}
}
case (some(?llval)) { llbinding = llval; }
}
}
case (some(?llval)) { llbinding = llval; }
}
auto llbinding = find_variable(cx.fcx, nid);
llbindings += ~[llbinding];
llbindingtys += ~[val_ty(llbinding)];
}