diff options
Diffstat (limited to 'src/expand/derive.cpp')
| -rw-r--r-- | src/expand/derive.cpp | 30 |
1 files changed, 24 insertions, 6 deletions
diff --git a/src/expand/derive.cpp b/src/expand/derive.cpp index ac9842a7..9d8169ad 100644 --- a/src/expand/derive.cpp +++ b/src/expand/derive.cpp @@ -11,6 +11,8 @@ #include "../ast/expr.hpp" #include "../ast/crate.hpp" #include <hir/hir.hpp> // ABI_RUST +#include <parse/common.hpp> // Parse_ModRoot_Items +#include "proc_macro.hpp" template<typename T> static inline ::std::vector<T> vec$(T v1) { @@ -2205,17 +2207,33 @@ static void derive_item(const Span& sp, const AST::Crate& crate, AST::Module& mo { DEBUG("- " << trait.name()); auto dp = find_impl(trait.name()); - if( !dp ) { - DEBUG("> No handler for " << trait.name()); - missing_handlers.push_back( trait.name() ); - fail = true; + if( dp ) { + mod.add_item(false, "", dp->handle_item(sp, (crate.m_load_std == ::AST::Crate::LOAD_NONE ? "" : "core"), params, type, item), {} ); continue ; } - // TODO: Support macros 1.1 custom derive + // Support custom derive + auto mac_name = FMT("deriving#" << trait.name()); // - Requires support all through the chain. + for(const auto& mac_path : mod.m_macro_imports) + { + if( mac_path.first.back() == mac_name ) + { + if( mac_path.second ) { + // macro_rules! based derive? + TODO(sp, "Custom derive using macro_rules?"); + } + else { + // proc_macro - Invoke the handler. + auto lex = ProcMacro_Invoke(sp, crate, mac_path.first, path.nodes().back().name(), item); + Parse_ModRoot_Items(*lex, mod); + } + } + } - mod.add_item(false, "", dp->handle_item(sp, (crate.m_load_std == ::AST::Crate::LOAD_NONE ? "" : "core"), params, type, item), {} ); + DEBUG("> No handler for " << trait.name()); + missing_handlers.push_back( trait.name() ); + fail = true; } if( fail ) { |