422 lines
13 KiB
Rust
422 lines
13 KiB
Rust
use crate::gen::block::Block;
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use crate::gen::ifndef;
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use crate::gen::out::{Content, OutFile};
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#[derive(Default, PartialEq)]
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pub struct Builtins<'a> {
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pub panic: bool,
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pub rust_string: bool,
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pub rust_str: bool,
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pub rust_slice: bool,
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pub rust_box: bool,
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pub rust_vec: bool,
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pub rust_fn: bool,
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pub rust_isize: bool,
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pub opaque: bool,
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pub layout: bool,
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pub unsafe_bitcopy: bool,
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pub unsafe_bitcopy_t: bool,
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pub rust_error: bool,
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pub manually_drop: bool,
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pub maybe_uninit: bool,
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pub trycatch: bool,
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pub ptr_len: bool,
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pub repr_fat: bool,
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pub rust_str_new_unchecked: bool,
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pub rust_str_repr: bool,
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pub rust_slice_new: bool,
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pub rust_slice_repr: bool,
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pub relocatable: bool,
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pub relocatable_or_array: bool,
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pub friend_impl: bool,
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pub is_complete: bool,
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pub destroy: bool,
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pub deleter_if: bool,
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pub content: Content<'a>,
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}
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impl<'a> Builtins<'a> {
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pub fn new() -> Self {
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Builtins::default()
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}
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}
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pub(super) fn write(out: &mut OutFile) {
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if out.builtin == Default::default() {
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return;
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}
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let include = &mut out.include;
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let builtin = &mut out.builtin;
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let out = &mut builtin.content;
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if builtin.rust_string {
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include.array = true;
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include.cstdint = true;
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include.string = true;
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}
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if builtin.rust_str {
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include.array = true;
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include.cstdint = true;
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include.string = true;
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builtin.friend_impl = true;
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}
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if builtin.rust_vec {
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include.algorithm = true;
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include.array = true;
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include.cassert = true;
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include.cstddef = true;
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include.cstdint = true;
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include.initializer_list = true;
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include.iterator = true;
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include.new = true;
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include.stdexcept = true;
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include.type_traits = true;
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include.utility = true;
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builtin.panic = true;
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builtin.rust_slice = true;
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builtin.unsafe_bitcopy_t = true;
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}
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if builtin.rust_slice {
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include.array = true;
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include.cassert = true;
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include.cstddef = true;
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include.cstdint = true;
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include.iterator = true;
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include.stdexcept = true;
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include.type_traits = true;
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builtin.friend_impl = true;
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builtin.layout = true;
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builtin.panic = true;
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}
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if builtin.rust_box {
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include.new = true;
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include.type_traits = true;
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include.utility = true;
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}
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if builtin.rust_fn {
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include.utility = true;
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}
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if builtin.rust_error {
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include.exception = true;
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builtin.friend_impl = true;
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}
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if builtin.rust_isize {
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include.basetsd = true;
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include.sys_types = true;
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}
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if builtin.relocatable_or_array {
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include.cstddef = true;
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builtin.relocatable = true;
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}
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if builtin.relocatable {
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include.type_traits = true;
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}
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if builtin.layout {
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include.type_traits = true;
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include.cstddef = true;
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builtin.is_complete = true;
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}
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if builtin.is_complete {
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include.cstddef = true;
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include.type_traits = true;
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}
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if builtin.unsafe_bitcopy {
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builtin.unsafe_bitcopy_t = true;
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}
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if builtin.trycatch {
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builtin.ptr_len = true;
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}
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out.begin_block(Block::Namespace("rust"));
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out.begin_block(Block::InlineNamespace("cxxbridge1"));
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let cxx_header = include.has_cxx_header();
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if !cxx_header {
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writeln!(out, "// #include \"rust/cxx.h\"");
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ifndef::write(out, builtin.panic, "CXXBRIDGE1_PANIC");
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if builtin.rust_string {
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out.next_section();
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writeln!(out, "struct unsafe_bitcopy_t;");
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}
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if builtin.friend_impl {
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out.begin_block(Block::AnonymousNamespace);
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writeln!(out, "template <typename T>");
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writeln!(out, "class impl;");
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out.end_block(Block::AnonymousNamespace);
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}
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out.next_section();
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if builtin.rust_str && !builtin.rust_string {
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writeln!(out, "class String;");
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}
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if builtin.layout && !builtin.opaque {
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writeln!(out, "class Opaque;");
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}
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if builtin.rust_slice {
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out.next_section();
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writeln!(out, "template <typename T>");
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writeln!(out, "::std::size_t size_of();");
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writeln!(out, "template <typename T>");
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writeln!(out, "::std::size_t align_of();");
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}
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ifndef::write(out, builtin.rust_string, "CXXBRIDGE1_RUST_STRING");
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ifndef::write(out, builtin.rust_str, "CXXBRIDGE1_RUST_STR");
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ifndef::write(out, builtin.rust_slice, "CXXBRIDGE1_RUST_SLICE");
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ifndef::write(out, builtin.rust_box, "CXXBRIDGE1_RUST_BOX");
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ifndef::write(out, builtin.unsafe_bitcopy_t, "CXXBRIDGE1_RUST_BITCOPY_T");
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ifndef::write(out, builtin.unsafe_bitcopy, "CXXBRIDGE1_RUST_BITCOPY");
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ifndef::write(out, builtin.rust_vec, "CXXBRIDGE1_RUST_VEC");
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ifndef::write(out, builtin.rust_fn, "CXXBRIDGE1_RUST_FN");
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ifndef::write(out, builtin.rust_error, "CXXBRIDGE1_RUST_ERROR");
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ifndef::write(out, builtin.rust_isize, "CXXBRIDGE1_RUST_ISIZE");
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ifndef::write(out, builtin.opaque, "CXXBRIDGE1_RUST_OPAQUE");
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ifndef::write(out, builtin.is_complete, "CXXBRIDGE1_IS_COMPLETE");
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ifndef::write(out, builtin.layout, "CXXBRIDGE1_LAYOUT");
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ifndef::write(out, builtin.relocatable, "CXXBRIDGE1_RELOCATABLE");
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}
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if builtin.rust_str_new_unchecked {
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out.next_section();
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writeln!(out, "class Str::uninit {{}};");
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writeln!(out, "inline Str::Str(uninit) noexcept {{}}");
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}
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if builtin.rust_slice_new {
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out.next_section();
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writeln!(out, "template <typename T>");
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writeln!(out, "class Slice<T>::uninit {{}};");
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writeln!(out, "template <typename T>");
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writeln!(out, "inline Slice<T>::Slice(uninit) noexcept {{}}");
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}
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out.begin_block(Block::Namespace("repr"));
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if builtin.repr_fat {
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include.array = true;
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include.cstdint = true;
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out.next_section();
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writeln!(out, "using Fat = ::std::array<::std::uintptr_t, 2>;");
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}
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if builtin.ptr_len {
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include.cstddef = true;
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out.next_section();
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writeln!(out, "struct PtrLen final {{");
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writeln!(out, " void *ptr;");
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writeln!(out, " ::std::size_t len;");
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writeln!(out, "}};");
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}
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out.end_block(Block::Namespace("repr"));
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out.begin_block(Block::Namespace("detail"));
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if builtin.maybe_uninit {
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include.cstddef = true;
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include.new = true;
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out.next_section();
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writeln!(out, "template <typename T, typename = void *>");
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writeln!(out, "struct operator_new {{");
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writeln!(
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out,
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" void *operator()(::std::size_t sz) {{ return ::operator new(sz); }}",
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);
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writeln!(out, "}};");
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out.next_section();
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writeln!(out, "template <typename T>");
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writeln!(
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out,
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"struct operator_new<T, decltype(T::operator new(sizeof(T)))> {{",
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);
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writeln!(
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out,
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" void *operator()(::std::size_t sz) {{ return T::operator new(sz); }}",
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);
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writeln!(out, "}};");
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}
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if builtin.trycatch {
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include.string = true;
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out.next_section();
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writeln!(out, "class Fail final {{");
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writeln!(out, " ::rust::repr::PtrLen &throw$;");
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writeln!(out, "public:");
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writeln!(
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out,
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" Fail(::rust::repr::PtrLen &throw$) noexcept : throw$(throw$) {{}}",
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);
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writeln!(out, " void operator()(char const *) noexcept;");
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writeln!(out, " void operator()(std::string const &) noexcept;");
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writeln!(out, "}};");
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}
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out.end_block(Block::Namespace("detail"));
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if builtin.manually_drop {
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out.next_section();
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include.utility = true;
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writeln!(out, "template <typename T>");
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writeln!(out, "union ManuallyDrop {{");
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writeln!(out, " T value;");
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writeln!(
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out,
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" ManuallyDrop(T &&value) : value(::std::move(value)) {{}}",
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);
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writeln!(out, " ~ManuallyDrop() {{}}");
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writeln!(out, "}};");
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}
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if builtin.maybe_uninit {
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include.cstddef = true;
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out.next_section();
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writeln!(out, "template <typename T>");
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writeln!(out, "union MaybeUninit {{");
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writeln!(out, " T value;");
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writeln!(
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out,
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" void *operator new(::std::size_t sz) {{ return detail::operator_new<T>{{}}(sz); }}",
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);
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writeln!(out, " MaybeUninit() {{}}");
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writeln!(out, " ~MaybeUninit() {{}}");
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writeln!(out, "}};");
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}
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out.begin_block(Block::AnonymousNamespace);
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if builtin.rust_str_new_unchecked || builtin.rust_str_repr {
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out.next_section();
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writeln!(out, "template <>");
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writeln!(out, "class impl<Str> final {{");
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writeln!(out, "public:");
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if builtin.rust_str_new_unchecked {
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writeln!(
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out,
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" static Str new_unchecked(repr::Fat repr) noexcept {{",
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);
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writeln!(out, " Str str = Str::uninit{{}};");
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writeln!(out, " str.repr = repr;");
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writeln!(out, " return str;");
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writeln!(out, " }}");
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}
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if builtin.rust_str_repr {
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writeln!(out, " static repr::Fat repr(Str str) noexcept {{");
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writeln!(out, " return str.repr;");
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writeln!(out, " }}");
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}
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writeln!(out, "}};");
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}
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if builtin.rust_slice_new || builtin.rust_slice_repr {
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out.next_section();
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writeln!(out, "template <typename T>");
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writeln!(out, "class impl<Slice<T>> final {{");
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writeln!(out, "public:");
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if builtin.rust_slice_new {
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writeln!(out, " static Slice<T> slice(repr::Fat repr) noexcept {{");
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writeln!(out, " Slice<T> slice = typename Slice<T>::uninit{{}};");
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writeln!(out, " slice.repr = repr;");
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writeln!(out, " return slice;");
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writeln!(out, " }}");
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}
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if builtin.rust_slice_repr {
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writeln!(out, " static repr::Fat repr(Slice<T> slice) noexcept {{");
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writeln!(out, " return slice.repr;");
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writeln!(out, " }}");
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}
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writeln!(out, "}};");
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}
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if builtin.rust_error {
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out.next_section();
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writeln!(out, "template <>");
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writeln!(out, "class impl<Error> final {{");
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writeln!(out, "public:");
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writeln!(out, " static Error error(repr::PtrLen repr) noexcept {{");
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writeln!(out, " Error error;");
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writeln!(out, " error.msg = static_cast<char const *>(repr.ptr);");
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writeln!(out, " error.len = repr.len;");
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writeln!(out, " return error;");
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writeln!(out, " }}");
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writeln!(out, "}};");
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}
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if builtin.destroy {
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out.next_section();
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writeln!(out, "template <typename T>");
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writeln!(out, "void destroy(T *ptr) {{");
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writeln!(out, " ptr->~T();");
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writeln!(out, "}}");
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}
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if builtin.deleter_if {
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out.next_section();
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writeln!(out, "template <bool> struct deleter_if {{");
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writeln!(out, " template <typename T> void operator()(T *) {{}}");
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writeln!(out, "}};");
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out.next_section();
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writeln!(out, "template <> struct deleter_if<true> {{");
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writeln!(
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out,
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" template <typename T> void operator()(T *ptr) {{ ptr->~T(); }}",
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);
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writeln!(out, "}};");
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}
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if builtin.relocatable_or_array {
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out.next_section();
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writeln!(out, "template <typename T>");
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writeln!(out, "struct IsRelocatableOrArray : IsRelocatable<T> {{}};");
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writeln!(out, "template <typename T, ::std::size_t N>");
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writeln!(
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out,
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"struct IsRelocatableOrArray<T[N]> : IsRelocatableOrArray<T> {{}};",
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);
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}
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out.end_block(Block::AnonymousNamespace);
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out.end_block(Block::InlineNamespace("cxxbridge1"));
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if builtin.trycatch {
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out.begin_block(Block::Namespace("behavior"));
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include.exception = true;
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include.type_traits = true;
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include.utility = true;
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writeln!(out, "class missing {{}};");
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writeln!(out, "missing trycatch(...);");
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writeln!(out);
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writeln!(out, "template <typename Try, typename Fail>");
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writeln!(out, "static typename ::std::enable_if<");
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writeln!(
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out,
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" ::std::is_same<decltype(trycatch(::std::declval<Try>(), ::std::declval<Fail>())),",
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);
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writeln!(out, " missing>::value>::type");
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writeln!(out, "trycatch(Try &&func, Fail &&fail) noexcept try {{");
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writeln!(out, " func();");
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writeln!(out, "}} catch (::std::exception const &e) {{");
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writeln!(out, " fail(e.what());");
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writeln!(out, "}}");
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out.end_block(Block::Namespace("behavior"));
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}
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out.end_block(Block::Namespace("rust"));
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}
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