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Improved unexposed template parameter tokenization

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This commit is contained in:
Bartek Kryza
2023-04-23 19:29:02 +02:00
parent 7f9d698afc
commit 0aa4eb732d
11 changed files with 530 additions and 155 deletions
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322
src/class_diagram/visitor/template_builder.cc
View File

@@ -17,6 +17,7 @@
*/
#include "template_builder.h"
#include "common/clang_utils.h"
#include "translation_unit_visitor.h"
namespace clanguml::class_diagram::visitor {
@@ -241,12 +242,18 @@ std::unique_ptr<class_> template_builder::build(const clang::NamedDecl *cls,
destination = best_match_full_name;
template_instantiation.add_relationship(
{relationship_t::kInstantiation, best_match_id});
template_instantiation.template_specialization_found(true);
}
// If we can't find optimal match for parent template specialization,
// just use whatever clang suggests
else if (diagram().has_element(templated_decl_local_id)) {
template_instantiation.add_relationship(
{relationship_t::kInstantiation, templated_decl_local_id});
template_instantiation.template_specialization_found(true);
}
else if (diagram().should_include(full_template_specialization_name)) {
LOG_DBG("Skipping instantiation relationship from {} to {}",
template_instantiation_ptr->full_name(false), templated_decl_id);
}
else {
LOG_DBG("== Cannot determine global id for specialization template {} "
@@ -333,12 +340,14 @@ template_builder::build_from_class_template_specialization(
destination = best_match_full_name;
template_instantiation.add_relationship(
{relationship_t::kInstantiation, best_match_id});
template_instantiation.template_specialization_found(true);
}
// If we can't find optimal match for parent template specialization,
// just use whatever clang suggests
else if (diagram().has_element(templated_decl_local_id)) {
// If we can't find optimal match for parent template specialization,
// just use whatever clang suggests
template_instantiation.add_relationship(
{relationship_t::kInstantiation, templated_decl_local_id});
template_instantiation.template_specialization_found(true);
}
else if (diagram().should_include(qualified_name)) {
LOG_DBG("Skipping instantiation relationship from {} to {}",
@@ -727,165 +736,192 @@ bool template_builder::find_relationships_in_unexposed_template_params(
return found;
}
std::optional<template_parameter>
template_builder::get_template_argument_from_type_parameter_string(
const clang::Decl *decl, const std::string &type_name) const
using token_it = std::vector<std::string>::const_iterator;
namespace detail {
std::string map_type_parameter_to_template_parameter(
const clang::ClassTemplateSpecializationDecl *decl, const std::string &tp)
{
const auto [depth0, index0, qualifier0] =
common::extract_template_parameter_index(tp);
for (auto i = 0U; i < decl->getDescribedTemplateParams()->size(); i++) {
const auto *param = decl->getDescribedTemplateParams()->getParam(i);
if (i == index0) {
return param->getNameAsString();
}
}
return tp;
}
std::string map_type_parameter_to_template_parameter(
const clang::TypeAliasTemplateDecl *decl, const std::string &tp)
{
const auto [depth0, index0, qualifier0] =
common::extract_template_parameter_index(tp);
for (auto i = 0U; i < decl->getTemplateParameters()->size(); i++) {
const auto *param = decl->getTemplateParameters()->getParam(i);
if (i == index0) {
return param->getNameAsString();
}
}
return tp;
}
}
template_parameter map_type_parameter_to_template_parameter(
const clang::Decl *decl, const std::string &tp)
{
if (const auto *template_decl =
llvm::dyn_cast<clang::ClassTemplateSpecializationDecl>(decl);
template_decl != nullptr && type_name.find("type-parameter-") == 0) {
if (type_name.rfind("type-parameter-") > 0 &&
type_name.find("::*") != std::string::npos) {
if (type_name.find("::*)") == std::string::npos) {
// This is a method invocation template, e.g.
// template <typename M, typename C>
// struct invocable<type-parameter-0-0 type-parameter-0-1::*>
// {};
const auto [depth0, index0, qualifier0] =
common::extract_template_parameter_index(
type_name.substr(0, type_name.find(' ')));
const auto [depth1, index1, qualifier1] =
common::extract_template_parameter_index(type_name.substr(
type_name.find(' ') + 1, type_name.find(':')));
auto template_param =
template_parameter::make_template_type({});
template_param.set_method_template(true);
std::string param_name = type_name;
for (auto i = 0U;
i < template_decl->getDescribedTemplateParams()->size();
i++) {
const auto *param =
template_decl->getDescribedTemplateParams()->getParam(
i);
if (i == index0) {
param_name = param->getNameAsString();
template_param.add_template_param(
template_parameter::make_template_type(param_name));
}
if (i == index1) {
param_name = param->getNameAsString();
template_param.add_template_param(
template_parameter::make_template_type(param_name));
}
}
template_param.set_method_qualifier(
type_name.substr(type_name.find("::*") + 3));
return template_param;
}
else {
// Here we're dealing with method type with args, e.g.:
// type-parameter-0-0
// (type-parameter-0-1::*)(type-parameter-0-2)
const auto [depth0, index0, qualifier0] =
common::extract_template_parameter_index(
type_name.substr(0, type_name.find(' ')));
const auto [depth1, index1, qualifier1] =
common::extract_template_parameter_index(type_name.substr(
type_name.find(" (") + 2, type_name.find(':')));
auto template_param =
template_parameter::make_template_type({});
template_param.set_method_template(true);
// TODO: Handle args
for (auto i = 0U;
i < template_decl->getDescribedTemplateParams()->size();
i++) {
const auto *param =
template_decl->getDescribedTemplateParams()->getParam(
i);
if (i == index0) {
template_param.add_template_param(
template_parameter::make_template_type(
param->getNameAsString()));
}
if (i == index1) {
template_param.add_template_param(
template_parameter::make_template_type(
param->getNameAsString()));
}
}
return template_param;
}
}
else {
const auto [depth, index, qualifier] =
common::extract_template_parameter_index(type_name);
std::string param_name = type_name;
clang::ClassTemplateSpecializationDecl *template_decl_at_depth =
const_cast<clang::ClassTemplateSpecializationDecl *>(
template_decl);
for (auto i = 0U; i <
template_decl_at_depth->getDescribedTemplateParams()->size();
i++) {
const auto *param =
template_decl_at_depth->getDescribedTemplateParams()
->getParam(i);
if (i == index) {
param_name = param->getNameAsString();
auto template_param =
template_parameter::make_template_type(param_name);
template_param.is_variadic(param->isParameterPack());
return template_param;
}
}
}
template_decl != nullptr && tp.find("type-parameter-") == 0) {
return template_parameter::make_template_type(
detail::map_type_parameter_to_template_parameter(
template_decl, tp));
}
else if (const auto *alias_decl =
llvm::dyn_cast<clang::TypeAliasTemplateDecl>(decl);
alias_decl != nullptr && type_name.find("type-parameter-") == 0) {
const auto [depth, index, qualifier] =
common::extract_template_parameter_index(type_name);
std::string param_name = type_name;
if (const auto *alias_decl =
llvm::dyn_cast<clang::TypeAliasTemplateDecl>(decl);
alias_decl != nullptr &&
(tp.find("type-parameter-") != std::string::npos)) {
return template_parameter::make_template_type(
detail::map_type_parameter_to_template_parameter(alias_decl, tp));
}
const auto *template_decl_at_depth = alias_decl;
return template_parameter::make_argument(tp);
}
template_decl_at_depth->dump();
std::optional<template_parameter> build_template_parameter(
const clang::Decl *decl, token_it begin, token_it end)
{
if (decl == nullptr)
return {};
for (auto i = 0U;
i < template_decl_at_depth->getTemplateParameters()->size(); i++) {
const auto *param =
template_decl_at_depth->getTemplateParameters()->getParam(i);
auto res = template_parameter::make_template_type({});
if (i == index) {
param_name = param->getNameAsString();
std::string param_qualifier{}; // e.g. const& or &&
auto template_param =
template_parameter::make_template_type(param_name);
auto it = begin;
auto it_next = it;
it_next++;
template_param.is_variadic(param->isParameterPack());
if (*it == "const") {
param_qualifier = "const";
it++;
it_next++;
}
return template_param;
}
if (it == end)
return {};
// simple template param without qualifiers
if (common::is_type_token(*it) && it_next == end) {
res = map_type_parameter_to_template_parameter(decl, *it);
return res;
}
// template parameter with qualifier at the end
else if (common::is_type_token(*it) && common::is_qualifier(*it_next)) {
res = map_type_parameter_to_template_parameter(decl, *it);
res.set_qualifier(*it_next);
return res;
}
// method template parameter
else if (common::is_type_token(*it) && common::is_type_token(*it_next)) {
res.add_template_param(
map_type_parameter_to_template_parameter(decl, *it));
res.add_template_param(
map_type_parameter_to_template_parameter(decl, *it_next));
it = it_next;
it++;
if (it != end && *it == "::") {
res.set_method_template(true);
it++;
it++;
}
if (it != end && common::is_qualifier(*it)) {
res.set_qualifier(*it);
}
return res;
}
else if (common::is_type_token(*it) && *it_next == "(") {
res.add_template_param(
map_type_parameter_to_template_parameter(decl, *it));
it_next++;
res.add_template_param(
map_type_parameter_to_template_parameter(decl, *it_next));
it = it_next;
it++;
if (*it == "::") {
res.set_method_template(true);
it++;
it++;
it++;
}
if (it != end) {
// handle args
if (*it == "(") {
it++;
while (true) {
auto arg_separator = std::find(it, end, ",");
if (arg_separator == end) {
// just one arg
auto args_end = std::find(it, end, ")");
auto arg = build_template_parameter(decl, it, args_end);
if (arg)
res.add_template_param(*arg);
it++;
break;
}
else {
auto arg =
build_template_parameter(decl, it, arg_separator);
if (arg)
res.add_template_param(*arg);
it = arg_separator;
it++;
}
}
assert(*it == ")");
it++;
if (it != end && common::is_qualifier(*it)) {
res.set_qualifier(*it);
}
}
return res;
}
else
return res;
}
return {};
}
std::optional<template_parameter>
template_builder::get_template_argument_from_type_parameter_string(
const clang::Decl *decl, std::string type_name) const
{
type_name = util::trim(type_name);
auto toks = common::tokenize_unexposed_template_parameter(type_name);
return build_template_parameter(decl, toks.begin(), toks.end());
}
template_parameter template_builder::process_integral_argument(
const clang::TemplateArgument &arg)
{

2
src/class_diagram/visitor/template_builder.h
View File

@@ -122,7 +122,7 @@ public:
std::optional<template_parameter>
get_template_argument_from_type_parameter_string(
const clang::Decl *decl, const std::string &type_name) const;
const clang::Decl *decl, std::string type_name) const;
common::visitor::ast_id_mapper &id_mapper();

14
src/class_diagram/visitor/translation_unit_visitor.cc
View File

@@ -210,11 +210,15 @@ bool translation_unit_visitor::VisitClassTemplateSpecializationDecl(
// Process template specialization bases
process_class_bases(cls, template_specialization);
const auto maybe_id =
id_mapper().get_global_id(cls->getSpecializedTemplate()->getID());
if (maybe_id.has_value())
template_specialization.add_relationship(
{relationship_t::kInstantiation, maybe_id.value()});
if (!template_specialization.template_specialization_found()) {
// Only do this if we haven't found a bettern specialization during
// construction of the template specialization
const auto maybe_id =
id_mapper().get_global_id(cls->getSpecializedTemplate()->getID());
if (maybe_id.has_value())
template_specialization.add_relationship(
{relationship_t::kInstantiation, maybe_id.value()});
}
if (diagram_.should_include(template_specialization)) {
const auto full_name = template_specialization.full_name(false);