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// Copyright (C) 2020-2023 Free Software Foundation, Inc.
// This file is part of GCC.
// GCC is free software; you can redistribute it and/or modify it under
// the terms of the GNU General Public License as published by the Free
// Software Foundation; either version 3, or (at your option) any later
// version.
// GCC 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 General Public License
// for more details.
// You should have received a copy of the GNU General Public License
// along with GCC; see the file COPYING3. If not see
// <http://www.gnu.org/licenses/>.
#include "rust-ast-fragment.h"
namespace Rust {
namespace AST {
Fragment::Fragment (FragmentKind kind, std::vector<SingleASTNode> nodes,
std::vector<std::unique_ptr<AST::Token>> tokens)
: kind (kind), nodes (std::move (nodes)), tokens (std::move (tokens))
{}
Fragment::Fragment (Fragment const &other) : kind (other.get_kind ())
{
*this = other;
}
Fragment &
Fragment::operator= (Fragment const &other)
{
kind = other.get_kind ();
nodes.clear ();
nodes.reserve (other.nodes.size ());
for (auto &n : other.nodes)
nodes.push_back (n);
tokens.clear ();
tokens.reserve (other.tokens.size ());
for (auto &t : other.tokens)
tokens.emplace_back (t->clone_token ());
return *this;
}
Fragment
Fragment::create_error ()
{
return Fragment (FragmentKind::Error, {}, {});
}
Fragment::Fragment (std::vector<AST::SingleASTNode> nodes,
std::vector<std::unique_ptr<AST::Token>> tokens)
: kind (FragmentKind::Complete), nodes (std::move (nodes)),
tokens (std::move (tokens))
{}
Fragment::Fragment (std::vector<AST::SingleASTNode> nodes,
std::unique_ptr<AST::Token> token)
: kind (FragmentKind::Complete), nodes (std::move (nodes))
{
tokens.emplace_back (std::move (token));
}
std::vector<SingleASTNode> &
Fragment::get_nodes ()
{
return nodes;
}
std::vector<std::unique_ptr<AST::Token>> &
Fragment::get_tokens ()
{
return tokens;
}
FragmentKind
Fragment::get_kind () const
{
return kind;
}
bool
Fragment::is_error () const
{
return get_kind () == FragmentKind::Error;
}
bool
Fragment::should_expand () const
{
return !is_error ();
}
bool
Fragment::is_expression_fragment () const
{
return is_single_fragment_of_kind (SingleASTNode::NodeType::EXPRESSION);
}
bool
Fragment::is_type_fragment () const
{
return is_single_fragment_of_kind (SingleASTNode::NodeType::TYPE);
}
std::unique_ptr<Expr>
Fragment::take_expression_fragment ()
{
assert_single_fragment (SingleASTNode::NodeType::EXPRESSION);
return nodes[0].take_expr ();
}
std::unique_ptr<Type>
Fragment::take_type_fragment ()
{
assert_single_fragment (SingleASTNode::NodeType::TYPE);
return nodes[0].take_type ();
}
void
Fragment::accept_vis (ASTVisitor &vis)
{
for (auto &node : nodes)
node.accept_vis (vis);
}
bool
Fragment::is_single_fragment () const
{
return nodes.size () == 1;
}
bool
Fragment::is_single_fragment_of_kind (SingleASTNode::NodeType expected) const
{
return is_single_fragment () && nodes[0].get_kind () == expected;
}
void
Fragment::assert_single_fragment (SingleASTNode::NodeType expected) const
{
static const std::map<SingleASTNode::NodeType, const char *> str_map = {
{SingleASTNode::NodeType::IMPL, "impl"},
{SingleASTNode::NodeType::ITEM, "item"},
{SingleASTNode::NodeType::TYPE, "type"},
{SingleASTNode::NodeType::EXPRESSION, "expr"},
{SingleASTNode::NodeType::STMT, "stmt"},
{SingleASTNode::NodeType::EXTERN, "extern"},
{SingleASTNode::NodeType::TRAIT, "trait"},
{SingleASTNode::NodeType::TRAIT_IMPL, "trait impl"},
};
auto actual = nodes[0].get_kind ();
auto fail = false;
if (!is_single_fragment ())
{
rust_error_at (Location (), "fragment is not single");
fail = true;
}
if (actual != expected)
{
rust_error_at (
Location (),
"invalid fragment operation: expected %qs node, got %qs node",
str_map.find (expected)->second,
str_map.find (nodes[0].get_kind ())->second);
fail = true;
}
rust_assert (!fail);
}
} // namespace AST
} // namespace Rust
|
