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LanguageServers/Cpp: Make find_declaration_of() more flexible

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Previously, find_declaration_of() only worked for AST nodes of type
Identifier. It now also works for declaration node, member variables
and function parameters.
This commit is contained in:
Itamar 2022-02-06 22:31:27 +02:00 • committed by Andreas Kling
parent a54d0cc805
commit 76000e9137
2 changed files with 28 additions and 14 deletions
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41
Userland/DevTools/HackStudio/LanguageServers/Cpp/CppComprehensionEngine.cpp
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@ -401,16 +401,22 @@ Optional<GUI::AutocompleteProvider::ProjectLocation> CppComprehensionEngine::fin
return {};
const auto& document = *document_ptr;
auto decl = find_declaration_of(document, identifier_position);
if (decl) {
return GUI::AutocompleteProvider::ProjectLocation { decl->filename(), decl->start().line, decl->start().column };
}
return find_preprocessor_definition(document, identifier_position);
}
RefPtr<Declaration> CppComprehensionEngine::find_declaration_of(const DocumentData& document, const GUI::TextPosition& identifier_position)
{
auto node = document.parser().node_at(Cpp::Position { identifier_position.line(), identifier_position.column() });
if (!node) {
dbgln_if(CPP_LANGUAGE_SERVER_DEBUG, "no node at position {}:{}", identifier_position.line(), identifier_position.column());
return {};
}
auto decl = find_declaration_of(document, *node);
if (decl)
return GUI::AutocompleteProvider::ProjectLocation { decl->filename(), decl->start().line, decl->start().column };
return find_preprocessor_definition(document, identifier_position);
return find_declaration_of(document, *node);
}
Optional<GUI::AutocompleteProvider::ProjectLocation> CppComprehensionEngine::find_preprocessor_definition(const DocumentData& document, const GUI::TextPosition& text_position)
@ -439,15 +445,27 @@ struct TargetDeclaration {
String name;
};
static Optional<TargetDeclaration> get_target_declaration(const ASTNode& node, String name);
static Optional<TargetDeclaration> get_target_declaration(const ASTNode& node)
{
if (!node.is_identifier()) {
dbgln_if(CPP_LANGUAGE_SERVER_DEBUG, "node is not an identifier");
return {};
if (node.is_identifier()) {
return get_target_declaration(node, static_cast<const Identifier&>(node).name());
}
String name = static_cast<const Identifier&>(node).name();
if (node.is_declaration()) {
return get_target_declaration(node, verify_cast<Declaration>(node).name());
}
if (node.is_type() && node.parent() && node.parent()->is_declaration()) {
return get_target_declaration(*node.parent(), verify_cast<Declaration>(node.parent())->name());
}
dbgln("get_target_declaration: Invalid argument node of type: {}", node.class_name());
return {};
}
static Optional<TargetDeclaration> get_target_declaration(const ASTNode& node, String name)
{
if ((node.parent() && node.parent()->is_function_call()) || (node.parent()->is_name() && node.parent()->parent() && node.parent()->parent()->is_function_call())) {
return TargetDeclaration { TargetDeclaration::Type::Function, name };
}
@ -460,14 +478,9 @@ static Optional<TargetDeclaration> get_target_declaration(const ASTNode& node)
return TargetDeclaration { TargetDeclaration::Type::Variable, name };
}
RefPtr<Declaration> CppComprehensionEngine::find_declaration_of(const DocumentData& document_data, const ASTNode& node) const
{
dbgln_if(CPP_LANGUAGE_SERVER_DEBUG, "find_declaration_of: {} ({})", document_data.parser().text_of_node(node), node.class_name());
if (!node.is_identifier()) {
dbgln("node is not an identifier, can't find declaration");
return {};
}
auto target_decl = get_target_declaration(node);
if (!target_decl.has_value())