mirror of
https://github.com/carbon-language/carbon-lang.git
synced 2026-09-27 18:50:09 +01:00
Jon Meow
70797e8bf8
This does a mass rename of:
- `SourceLoc()` -> `source_loc()` for property naming
- `loc` -> `source_loc_` for underscore+consistency
- Generally changing function args to `source_loc` for consistency
- `Tag()` -> `kind()` for property naming and `Kind` parity
- `tag` -> `kind_` for underscore
Also renames `Pos` and `Results` on `Action`. These are a bit of an exception in that most base classes only have `Tag` and maybe `SourceLoc`, whereas `Action` has a little more. I felt okay having `source_loc()` and `kind()` on the base class where children do `Exp()` and the like, but it felt weird to me to mix it on the same class.
The reason for doing this cross-class in one PR is so that I can do it efficiently with a global replace in the codebase, rather than e.g. changing `Expression` but having to read through compiler errors to determine where it's calling `Expression`'s `Tag` versus a different `Tag`. The end result should be equivalent.
89 lines
2.9 KiB
C++
89 lines
2.9 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 EXECUTABLE_SEMANTICS_AST_PAREN_CONTENTS_H_
|
|
#define EXECUTABLE_SEMANTICS_AST_PAREN_CONTENTS_H_
|
|
|
|
#include <optional>
|
|
#include <string>
|
|
#include <vector>
|
|
|
|
#include "executable_semantics/ast/source_location.h"
|
|
#include "executable_semantics/common/error.h"
|
|
|
|
namespace Carbon {
|
|
|
|
// Represents the syntactic contents of an expression or pattern delimited by
|
|
// parentheses. In those syntaxes, parentheses can be used either for grouping
|
|
// or for forming a tuple, depending on their context and the syntax of their
|
|
// contents; this class helps calling code resolve that ambiguity. Since that
|
|
// ambiguity is purely syntactic, this class should only be needed during
|
|
// parsing.
|
|
//
|
|
// `Term` is the type of the syntactic grouping being built, and the type of
|
|
// the individual syntactic units it's built from; typically it should be
|
|
// either `Expression` or `Pattern`.
|
|
template <typename Term>
|
|
struct ParenContents {
|
|
struct Element {
|
|
std::optional<std::string> name;
|
|
Nonnull<Term*> term;
|
|
};
|
|
|
|
// If this object represents a single term, with no name and no trailing
|
|
// comma, this method returns that term. This typically means the parentheses
|
|
// can be interpreted as grouping.
|
|
auto SingleTerm() const -> std::optional<Nonnull<Term*>>;
|
|
|
|
// Converts `elements` to std::vector<TupleElement>. TupleElement must
|
|
// have a constructor that takes a std::string and a Nonnull<Term*>.
|
|
//
|
|
// TODO: Find a way to deduce TupleElement from Term.
|
|
template <typename TupleElement>
|
|
auto TupleElements(SourceLocation source_loc) const
|
|
-> std::vector<TupleElement>;
|
|
|
|
std::vector<Element> elements;
|
|
bool has_trailing_comma;
|
|
};
|
|
|
|
// Implementation details only below here.
|
|
|
|
template <typename Term>
|
|
auto ParenContents<Term>::SingleTerm() const -> std::optional<Nonnull<Term*>> {
|
|
if (elements.size() == 1 && !elements.front().name.has_value() &&
|
|
!has_trailing_comma) {
|
|
return elements.front().term;
|
|
} else {
|
|
return std::nullopt;
|
|
}
|
|
}
|
|
|
|
template <typename Term>
|
|
template <typename TupleElement>
|
|
auto ParenContents<Term>::TupleElements(SourceLocation source_loc) const
|
|
-> std::vector<TupleElement> {
|
|
std::vector<TupleElement> result;
|
|
int i = 0;
|
|
bool seen_named_member = false;
|
|
for (auto element : elements) {
|
|
if (element.name.has_value()) {
|
|
seen_named_member = true;
|
|
result.push_back(TupleElement(*element.name, element.term));
|
|
} else {
|
|
if (seen_named_member) {
|
|
FATAL_PROGRAM_ERROR(source_loc)
|
|
<< "positional members must come before named members";
|
|
}
|
|
result.push_back(TupleElement(std::to_string(i), element.term));
|
|
}
|
|
++i;
|
|
}
|
|
return result;
|
|
}
|
|
|
|
} // namespace Carbon
|
|
|
|
#endif // EXECUTABLE_SEMANTICS_AST_PAREN_CONTENTS_H_
|