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/* valaunusedattr.vala
*
* Copyright (C) 2014-2015 Jürg Billeter
* Copyright (C) 2014-2015 Luca Bruno
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
* Author:
* Luca Bruno <lucabru@src.gnome.org>
*/
using GLib;
/**
* Code visitor to warn about unused attributes
*/
public class Vala.UsedAttr : CodeVisitor {
public Vala.Map<string,Vala.Set<string>> marked = new HashMap<string,Vala.Set<string>> (str_hash, str_equal);
const string[] valac_default_attrs = {
"CCode", "type_signature", "default_value", "set_value_function", "type_id", "cprefix", "cheader_filename",
"marshaller_type_name", "get_value_function", "cname", "destroy_function", "lvalue_access",
"has_type_id", "instance_pos", "const_cname", "take_value_function", "copy_function", "free_function",
"param_spec_function", "has_target", "has_typedef", "type_cname", "ref_function", "ref_function_void", "unref_function", "type",
"has_construct_function", "returns_floating_reference", "gir_namespace", "gir_version", "construct_function",
"lower_case_cprefix", "simple_generics", "sentinel", "scope", "has_destroy_function", "ordering", "type_check_function", "type_get_function",
"has_copy_function", "lower_case_csuffix", "ref_sink_function", "dup_function", "finish_function", "generic_type_pos",
"array_length_type", "array_length", "array_length_cname", "array_length_cexpr", "array_null_terminated",
"vfunc_name", "finish_vfunc_name", "finish_name", "free_function_address_of", "pos", "delegate_target", "delegate_target_cname",
"array_length_pos", "delegate_target_pos", "destroy_notify_pos", "ctype", "has_new_function", "notify", "finish_instance",
"use_inplace", "feature_test_macro", "default_value_on_error", "async_result_pos", "error_pos", "destroy_notify_cname", "",
"Immutable", "",
"SingleInstance", "",
"Compact", "opaque", "",
"NoWrapper", "",
"NoThrow", "",
"DestroysInstance", "",
"Flags", "",
"Experimental", "", // deprecated
"NoReturn", "",
"NoArrayLength", "", // deprecated
"Assert", "",
"ErrorBase", "",
"GenericAccessors", "",
"Diagnostics", "",
"NoAccessorMethod", "",
"ConcreteAccessor", "",
"HasEmitter", "",
"ReturnsModifiedPointer", "",
"Deprecated", "since", "replacement", "", // deprecated
"Version", "since", "replacement", "deprecated", "deprecated_since", "experimental", "experimental_until", "",
"Signal", "detailed", "run", "no_recurse", "action", "no_hooks", "",
"Description", "nick", "blurb", "",
"IntegerType", "rank", "min", "max", "signed", "width", "",
"FloatingType", "rank", "decimal", "width", "",
"BooleanType", "",
"SimpleType", "",
"PointerType", "",
"Print", "",
"PrintfFormat", "",
"ScanfFormat", "",
"FormatArg", "",
"Source", "filename", "line", "column", "",
"GtkChild", "name", "internal", "",
"GtkTemplate", "ui", "",
"GtkCallback", "name", "",
"ModuleInit", "",
"Profile", "",
"DBus", "name", "no_reply", "result", "use_string_marshalling", "value", "signature", "visible", "timeout", "",
"GIR", "fullname", "name", "visible", ""
};
public UsedAttr () {
// mark default valac attrs
var curattr = "";
foreach (unowned string val in valac_default_attrs) {
if (val == "") {
curattr = "";
} else {
if (curattr == "") {
curattr = val;
mark (curattr, null);
} else {
mark (curattr, val);
}
}
}
}
/**
* Mark the attribute or attribute argument as used by the compiler
*/
public void mark (string attribute, string? argument) {
var set = marked.get (attribute);
if (set == null) {
set = new HashSet<string> (str_hash, str_equal);
marked.set (attribute, set);
}
if (argument != null) {
set.add (argument);
}
}
/**
* Traverse the code tree and warn about unused attributes.
*
* @param context a code context
*/
public void check_unused (CodeContext context) {
context.root.accept (this);
}
void check_unused_attr (Symbol sym) {
foreach (unowned Attribute attr in sym.attributes) {
var set = marked.get (attr.name);
if (set == null) {
Report.warning (attr.source_reference, "Attribute `%s' never used", attr.name);
} else {
foreach (var arg in attr.args.get_keys()) {
if (!set.contains (arg)) {
Report.warning (attr.source_reference, "Argument `%s' never used", arg);
}
}
}
}
}
public override void visit_namespace (Namespace ns) {
check_unused_attr (ns);
ns.accept_children (this);
}
public override void visit_class (Class cl) {
check_unused_attr (cl);
cl.accept_children (this);
}
public override void visit_struct (Struct st) {
check_unused_attr (st);
st.accept_children (this);
}
public override void visit_interface (Interface iface) {
check_unused_attr (iface);
iface.accept_children (this);
}
public override void visit_enum (Enum en) {
check_unused_attr (en);
en.accept_children (this);
}
public override void visit_error_domain (ErrorDomain ed) {
check_unused_attr (ed);
ed.accept_children (this);
}
public override void visit_delegate (Delegate cb) {
check_unused_attr (cb);
cb.accept_children (this);
}
public override void visit_constant (Constant c) {
check_unused_attr (c);
}
public override void visit_field (Field f) {
check_unused_attr (f);
}
public override void visit_method (Method m) {
check_unused_attr (m);
m.accept_children (this);
}
public override void visit_creation_method (CreationMethod m) {
check_unused_attr (m);
m.accept_children (this);
}
public override void visit_formal_parameter (Parameter p) {
check_unused_attr (p);
}
public override void visit_property (Property prop) {
check_unused_attr (prop);
}
public override void visit_signal (Signal sig) {
check_unused_attr (sig);
sig.accept_children (this);
}
}
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