c9375fed8d
This required changing almost all users of hashmaps to import the hashmap interface first. The `size` member in the hashmap structure was renamed to `count` to work around a name conflict.
96 lines
2.6 KiB
Rust
96 lines
2.6 KiB
Rust
import std::map::hashmap;
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import syntax::ast;
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import syntax::visit;
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import syntax::print::pprust::expr_to_str;
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import driver::session::session;
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export check_crate_fn_usage;
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type fn_usage_ctx = {
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tcx: ty::ctxt,
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unsafe_fn_legal: bool,
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generic_bare_fn_legal: bool
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};
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fn fn_usage_expr(expr: @ast::expr,
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ctx: fn_usage_ctx,
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v: visit::vt<fn_usage_ctx>) {
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alt expr.node {
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ast::expr_path(path) {
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if !ctx.unsafe_fn_legal {
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alt ctx.tcx.def_map.find(expr.id) {
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some(ast::def_fn(_, ast::unsafe_fn)) {
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log(error, ("expr=", expr_to_str(expr)));
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ctx.tcx.sess.span_fatal(
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expr.span,
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"unsafe functions can only be called");
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}
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_ {}
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}
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}
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if !ctx.generic_bare_fn_legal
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&& ty::expr_has_ty_params(ctx.tcx, expr) {
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alt ty::get(ty::expr_ty(ctx.tcx, expr)).struct {
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ty::ty_fn({proto: ast::proto_bare, _}) {
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ctx.tcx.sess.span_fatal(
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expr.span,
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"generic bare functions can only be called or bound");
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}
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_ { }
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}
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}
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}
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ast::expr_call(f, args, _) {
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let f_ctx = {unsafe_fn_legal: true,
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generic_bare_fn_legal: true with ctx};
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v.visit_expr(f, f_ctx, v);
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let args_ctx = {unsafe_fn_legal: false,
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generic_bare_fn_legal: false with ctx};
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visit::visit_exprs(args, args_ctx, v);
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}
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ast::expr_bind(f, args) {
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let f_ctx = {unsafe_fn_legal: false,
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generic_bare_fn_legal: true with ctx};
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v.visit_expr(f, f_ctx, v);
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let args_ctx = {unsafe_fn_legal: false,
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generic_bare_fn_legal: false with ctx};
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for arg in args {
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visit::visit_expr_opt(arg, args_ctx, v);
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}
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}
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_ {
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let subctx = {unsafe_fn_legal: false,
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generic_bare_fn_legal: false with ctx};
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visit::visit_expr(expr, subctx, v);
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}
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}
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}
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fn check_crate_fn_usage(tcx: ty::ctxt, crate: @ast::crate) {
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let visit =
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visit::mk_vt(
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@{visit_expr: fn_usage_expr
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with *visit::default_visitor()});
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let ctx = {
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tcx: tcx,
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unsafe_fn_legal: false,
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generic_bare_fn_legal: false
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};
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visit::visit_crate(*crate, ctx, visit);
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}
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// Local Variables:
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// mode: rust
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// fill-column: 78;
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// indent-tabs-mode: nil
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// c-basic-offset: 4
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// buffer-file-coding-system: utf-8-unix
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// End:
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