mirror of
https://github.com/carbon-language/carbon-lang.git
synced 2026-09-24 22:00:12 +01:00
98 lines
3.4 KiB
C++
98 lines
3.4 KiB
C++
// Part of the Carbon Language project, under the Apache License v2.0 with LLVM
|
|
// Exceptions. See /LICENSE for license information.
|
|
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
|
|
|
|
#ifndef CARBON_TOOLCHAIN_PARSE_TREE_NODE_DIAGNOSTIC_CONVERTER_H_
|
|
#define CARBON_TOOLCHAIN_PARSE_TREE_NODE_DIAGNOSTIC_CONVERTER_H_
|
|
|
|
#include "toolchain/diagnostics/diagnostic_emitter.h"
|
|
#include "toolchain/lex/tokenized_buffer.h"
|
|
#include "toolchain/parse/tree.h"
|
|
|
|
namespace Carbon::Parse {
|
|
|
|
class NodeLoc {
|
|
public:
|
|
// NOLINTNEXTLINE(google-explicit-constructor)
|
|
NodeLoc(NodeId node_id) : NodeLoc(node_id, false) {}
|
|
NodeLoc(NodeId node_id, bool token_only)
|
|
: node_id_(node_id), token_only_(token_only) {}
|
|
// TODO: Have some other way of representing diagnostic that applies to a file
|
|
// as a whole.
|
|
// NOLINTNEXTLINE(google-explicit-constructor)
|
|
NodeLoc(InvalidNodeId node_id) : NodeLoc(node_id, false) {}
|
|
|
|
auto node_id() const -> NodeId { return node_id_; }
|
|
auto token_only() const -> bool { return token_only_; }
|
|
|
|
private:
|
|
NodeId node_id_;
|
|
bool token_only_;
|
|
};
|
|
|
|
class NodeLocConverter : public DiagnosticConverter<NodeLoc> {
|
|
public:
|
|
explicit NodeLocConverter(const Lex::TokenizedBuffer* tokens,
|
|
llvm::StringRef filename, const Tree* parse_tree)
|
|
: token_converter_(tokens),
|
|
filename_(filename),
|
|
parse_tree_(parse_tree) {}
|
|
|
|
// Map the given token into a diagnostic location.
|
|
auto ConvertLoc(NodeLoc node_loc, ContextFnT context_fn) const
|
|
-> DiagnosticLoc override {
|
|
// Support the invalid token as a way to emit only the filename, when there
|
|
// is no line association.
|
|
if (!node_loc.node_id().is_valid()) {
|
|
return {.filename = filename_};
|
|
}
|
|
|
|
if (node_loc.token_only()) {
|
|
return token_converter_.ConvertLoc(
|
|
parse_tree_->node_token(node_loc.node_id()), context_fn);
|
|
}
|
|
|
|
// Construct a location that encompasses all tokens that descend from this
|
|
// node (including the root).
|
|
Lex::TokenIndex start_token = parse_tree_->node_token(node_loc.node_id());
|
|
Lex::TokenIndex end_token = start_token;
|
|
for (NodeId desc : parse_tree_->postorder(node_loc.node_id())) {
|
|
Lex::TokenIndex desc_token = parse_tree_->node_token(desc);
|
|
if (!desc_token.is_valid()) {
|
|
continue;
|
|
}
|
|
if (desc_token < start_token) {
|
|
start_token = desc_token;
|
|
} else if (desc_token > end_token) {
|
|
end_token = desc_token;
|
|
}
|
|
}
|
|
DiagnosticLoc start_loc =
|
|
token_converter_.ConvertLoc(start_token, context_fn);
|
|
if (start_token == end_token) {
|
|
return start_loc;
|
|
}
|
|
DiagnosticLoc end_loc = token_converter_.ConvertLoc(end_token, context_fn);
|
|
// For multiline locations we simply return the rest of the line for now
|
|
// since true multiline locations are not yet supported.
|
|
if (start_loc.line_number != end_loc.line_number) {
|
|
start_loc.length = start_loc.line.size() - start_loc.column_number + 1;
|
|
} else {
|
|
if (start_loc.column_number != end_loc.column_number) {
|
|
start_loc.length =
|
|
end_loc.column_number + end_loc.length - start_loc.column_number;
|
|
}
|
|
}
|
|
return start_loc;
|
|
}
|
|
|
|
private:
|
|
Lex::TokenDiagnosticConverter token_converter_;
|
|
llvm::StringRef filename_;
|
|
const Tree* parse_tree_;
|
|
};
|
|
|
|
} // namespace Carbon::Parse
|
|
|
|
#endif // CARBON_TOOLCHAIN_PARSE_TREE_NODE_DIAGNOSTIC_CONVERTER_H_
|