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Parse enums

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This commit is contained in:
Jonathan Müller 2017-02-23 17:52:11 +01:00
commit a47e66e2c4
16 changed files with 262 additions and 109 deletions
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82
src/libclang/enum_parser.cpp Normal file
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@ -0,0 +1,82 @@
// Copyright (C) 2017 Jonathan Müller <jonathanmueller.dev@gmail.com>
// This file is subject to the license terms in the LICENSE file
// found in the top-level directory of this distribution.
#include <cppast/cpp_enum.hpp>
#include "parse_functions.hpp"
#include "libclang_visitor.hpp"
using namespace cppast;
namespace
{
std::unique_ptr<cpp_enum_value> parse_enum_value(const detail::parse_context& context,
const CXCursor& cur)
{
DEBUG_ASSERT(cur.kind == CXCursor_EnumConstantDecl, detail::parse_error_handler{}, cur,
"unexpected child cursor of enum");
detail::tokenizer tokenizer(context.tu, context.file, cur);
detail::token_stream stream(tokenizer, cur);
// <identifier>,
// or: <identifier> = <expression>,
auto& name = stream.get().value();
std::unique_ptr<cpp_expression> value;
if (detail::skip_if(stream, "="))
{
detail::visit_children(cur, [&](const CXCursor& child) {
DEBUG_ASSERT(clang_isExpression(child.kind) && !value,
detail::parse_error_handler{}, cur,
"unexpected child cursor of enum value");
value = detail::parse_expression(context, child);
});
}
return cpp_enum_value::build(*context.idx, detail::get_entity_id(cur), name.c_str(),
std::move(value));
}
cpp_enum::builder make_enum_builder(const detail::parse_context& context, const CXCursor& cur)
{
detail::tokenizer tokenizer(context.tu, context.file, cur);
detail::token_stream stream(tokenizer, cur);
// enum [class] name [: type] {
detail::skip(stream, "enum");
auto scoped = detail::skip_if(stream, "class");
auto& name = stream.get().value();
std::unique_ptr<cpp_type> type;
if (detail::skip_if(stream, ":"))
// parse type, explictly given one
type = detail::parse_type(context, clang_getEnumDeclIntegerType(cur));
return cpp_enum::builder(name.c_str(), scoped, std::move(type));
}
}
std::unique_ptr<cpp_entity> detail::parse_cpp_enum(const detail::parse_context& context,
const CXCursor& cur)
{
DEBUG_ASSERT(cur.kind == CXCursor_EnumDecl, detail::assert_handler{});
if (!clang_isCursorDefinition(cur))
return nullptr;
auto builder = make_enum_builder(context, cur);
detail::visit_children(cur, [&](const CXCursor& child) {
try
{
auto entity = parse_enum_value(context, child);
builder.add_value(std::move(entity));
}
catch (parse_error& ex)
{
context.logger->log("libclang parser", ex.get_diagnostic());
}
});
return builder.finish(*context.idx, get_entity_id(cur));
}

34
src/libclang/expression_parser.cpp Normal file
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@ -0,0 +1,34 @@
// Copyright (C) 2017 Jonathan Müller <jonathanmueller.dev@gmail.com>
// This file is subject to the license terms in the LICENSE file
// found in the top-level directory of this distribution.
#include <cppast/cpp_expression.hpp>
#include "parse_functions.hpp"
using namespace cppast;
std::unique_ptr<cpp_expression> detail::parse_expression(const detail::parse_context& context,
const CXCursor& cur)
{
auto kind = clang_getCursorKind(cur);
DEBUG_ASSERT(clang_isExpression(kind), detail::assert_handler{});
detail::tokenizer tokenizer(context.tu, context.file, cur);
detail::token_stream stream(tokenizer, cur);
// just concat everything
std::string expr;
while (!stream.done())
expr += stream.get().c_str();
auto type = parse_type(context, clang_getCursorType(cur));
if (kind == CXCursor_CharacterLiteral || kind == CXCursor_CompoundLiteralExpr
|| kind == CXCursor_FloatingLiteral || kind == CXCursor_ImaginaryLiteral
|| kind == CXCursor_IntegerLiteral || kind == CXCursor_StringLiteral
|| kind == CXCursor_CXXBoolLiteralExpr || kind == CXCursor_CXXNullPtrLiteralExpr)
return cpp_literal_expression::build(std::move(type), std::move(expr));
else
return cpp_unexposed_expression::build(std::move(type), std::move(expr));
}

3
src/libclang/parse_functions.cpp
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@ -38,6 +38,9 @@ std::unique_ptr<cpp_entity> detail::parse_entity(const detail::parse_context& co
case CXCursor_TypedefDecl:
return parse_cpp_type_alias(context, cur);
case CXCursor_EnumDecl:
return parse_cpp_enum(context, cur);
default:
break;
}

7
src/libclang/parse_functions.hpp
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@ -14,6 +14,7 @@
namespace cppast
{
class cpp_expression;
class cpp_type;
namespace detail
@ -30,6 +31,9 @@ namespace cppast
std::unique_ptr<cpp_type> parse_type(const parse_context& context, const CXType& type);
std::unique_ptr<cpp_expression> parse_expression(const parse_context& context,
const CXCursor& cur);
// parse_entity() dispatches on the cursor type
// it calls one of the other parse functions defined elsewhere
// try_parse_XXX are not exposed entities
@ -50,6 +54,9 @@ namespace cppast
std::unique_ptr<cpp_entity> parse_cpp_type_alias(const parse_context& context,
const CXCursor& cur);
std::unique_ptr<cpp_entity> parse_cpp_enum(const parse_context& context,
const CXCursor& cur);
std::unique_ptr<cpp_entity> parse_entity(const parse_context& context, const CXCursor& cur);
}
} // namespace cppast::detail

3
src/libclang/tokenizer.cpp
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@ -152,6 +152,9 @@ namespace
} while (!token_after_is(tu, file, cur, end, ";"));
end = get_next_location(tu, file, end);
}
else if (clang_isExpression(clang_getCursorKind(cur)))
// need to shrink range by one
end = get_next_location(tu, file, end, -1);
return clang_getRange(begin, end);
}

9
src/libclang/type_parser.cpp
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@ -399,17 +399,12 @@ namespace
}
std::unique_ptr<cpp_type> detail::parse_type(const detail::parse_context& context,
const CXType& type) try
const CXType& type)
{
auto result = parse_type_impl(context, type);
DEBUG_ASSERT(result && is_valid(*result), detail::parse_error_handler{}, type, "invalid type");
return std::move(result);
}
catch (parse_error& ex)
{
context.logger->log("libclang parser", ex.get_diagnostic());
return nullptr;
}
std::unique_ptr<cpp_entity> detail::parse_cpp_type_alias(const detail::parse_context& context,
const CXCursor& cur)
@ -419,7 +414,5 @@ std::unique_ptr<cpp_entity> detail::parse_cpp_type_alias(const detail::parse_con
auto name = cxstring(clang_getCursorSpelling(cur));
auto type = parse_type(context, clang_getTypedefDeclUnderlyingType(cur));
if (!type)
return nullptr;
return cpp_type_alias::build(*context.idx, get_entity_id(cur), name.c_str(), std::move(type));
}