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LibCpp: Introduce DummyASTNode

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This allows us to use pase_* methods inside match_* methods,
without adding any actual AST nodes to the m_nodes list.
This commit is contained in:
Itamar 2021-04-02 13:57:52 +03:00 • committed by Andreas Kling
parent aa717e6a62
commit e16036b9cc
3 changed files with 38 additions and 16 deletions
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16
Userland/Libraries/LibCpp/Parser.h
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@ -155,6 +155,7 @@ private:
struct State {
size_t token_index { 0 };
Vector<String> errors;
NonnullRefPtrVector<ASTNode> nodes;
};
void error(StringView message = {});
@ -164,7 +165,9 @@ private:
create_ast_node(ASTNode& parent, const Position& start, Optional<Position> end, Args&&... args)
{
auto node = adopt(*new T(&parent, start, end, m_filename, forward<Args>(args)...));
m_nodes.append(node);
if(!parent.is_dummy_node()) {
m_state.nodes.append(node);
}
return node;
}
@ -172,11 +175,19 @@ private:
create_root_ast_node(const Position& start, Position end)
{
auto node = adopt(*new TranslationUnit(nullptr, start, end, m_filename));
m_nodes.append(node);
m_state.nodes.append(node);
m_root_node = node;
return node;
}
DummyAstNode& get_dummy_node()
{
static NonnullRefPtr<DummyAstNode> dummy = adopt(*new DummyAstNode(nullptr, {}, {}, {}));
return dummy;
}
bool match_attribute_specification();
void consume_attribute_specification();
bool match_ellipsis();
@ -191,7 +202,6 @@ private:
State m_state;
Vector<State> m_saved_states;
RefPtr<TranslationUnit> m_root_node;
NonnullRefPtrVector<ASTNode> m_nodes;
Vector<TokenAndPreprocessorDefinition> m_replaced_preprocessor_tokens;
};