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/*
*/
#include <ast/ast.hpp>
#include <ast/crate.hpp>
#include <main_bindings.hpp>
#include <synext.hpp>
#include <map>
#include "macro_rules.hpp"
#include "../parse/common.hpp" // For reparse from macros
::std::map< ::std::string, ::std::unique_ptr<ExpandDecorator> > g_decorators;
::std::map< ::std::string, ::std::unique_ptr<ExpandProcMacro> > g_macros;
void Register_Synext_Decorator(::std::string name, ::std::unique_ptr<ExpandDecorator> handler) {
g_decorators[name] = mv$(handler);
}
void Register_Synext_Macro(::std::string name, ::std::unique_ptr<ExpandProcMacro> handler) {
g_macros[name] = mv$(handler);
}
void Expand_Attrs(const ::AST::MetaItems& attrs, AttrStage stage, ::AST::Crate& crate, const ::AST::Path& path, ::AST::Module& mod, ::AST::Item& item)
{
for( auto& a : attrs.m_items )
{
for( auto& d : g_decorators ) {
if( d.first == a.name() ) {
DEBUG("#[" << d.first << "] " << (int)d.second->stage() << "-" << (int)stage);
if( d.second->stage() == stage ) {
d.second->handle(a, crate, path, mod, item);
}
}
}
}
}
::std::unique_ptr<TokenStream> Expand_Macro(bool is_early, LList<const AST::Module*> modstack, ::AST::Module& mod, ::AST::MacroInvocation& mi)
{
for( const auto& m : g_macros )
{
if( mi.name() == m.first && m.second->expand_early() == is_early )
{
auto e = m.second->expand(mi.input_ident(), mi.input_tt(), mod);
mi.clear();
return e;
}
}
// Iterate up the module tree, using the first located macro
for(const auto* ll = &modstack; ll; ll = ll->m_prev)
{
const auto& mac_mod = *ll->m_item;
for( const auto& mr : mac_mod.macros() )
{
//DEBUG("- " << mr.name);
if( mr.name == mi.name() )
{
if( mi.input_ident() != "" )
; // TODO: ERROR - macro_rules! macros can't take an ident
auto e = Macro_Invoke(mr.name.c_str(), mr.data, mi.input_tt(), mod);
mi.clear();
return e;
}
}
for( const auto& mri : mac_mod.macro_imports_res() )
{
//DEBUG("- " << mri.name);
if( mri.name == mi.name() )
{
if( mi.input_ident() != "" )
; // TODO: ERROR - macro_rules! macros can't take an ident
auto e = Macro_Invoke(mi.name().c_str(), *mri.data, mi.input_tt(), mod);
mi.clear();
return e;
}
}
}
if( ! is_early ) {
// Error - Unknown macro name
ERROR(mi.span(), E0000, "Unknown macro '" << mi.name() << "'");
}
// Leave valid and return an empty expression
return ::std::unique_ptr<TokenStream>();
}
void Expand_Mod(bool is_early, ::AST::Crate& crate, LList<const AST::Module*> modstack, ::AST::Path modpath, ::AST::Module& mod)
{
TRACE_FUNCTION_F("is_early = " << is_early << ", modpath = " << modpath);
for( const auto& mi: mod.macro_imports_res() )
DEBUG("- Imports '" << mi.name << "'");
// TODO: Have the AST representation of a module include the definition order,
// mixing macro invocations, general items, use statements, and `impl`s
// 1. Macros first
//for( auto& mi : mod.macro_invs() )
for(unsigned int i = 0; i < mod.macro_invs().size(); i ++ )
{
auto& mi = mod.macro_invs()[i];
DEBUG("> Macro invoke '"<<mi.name()<<"'");
if( mi.name() != "" )
{
// Move out of the module to avoid invalidation if a new macro invocation is added
auto mi_owned = mv$(mi);
auto ttl = Expand_Macro(is_early, modstack, mod, mi_owned);
if( mi_owned.name() != "" )
{
mod.macro_invs()[i] = mv$(mi_owned);
}
else
{
// Re-parse tt
assert(ttl.get());
Parse_ModRoot_Items(*ttl, mod, false, "-");
}
}
}
// 2. General items
DEBUG("Items");
for( auto& i : mod.items() )
{
DEBUG("- " << i.name << " :: " << i.data.attrs);
::AST::Path path = modpath + i.name;
Expand_Attrs(i.data.attrs, (is_early ? AttrStage::EarlyPre : AttrStage::LatePre), crate, path, mod, i.data);
TU_MATCH(::AST::Item, (i.data), (e),
(None,
// Skip, nothing
),
(Module,
LList<const AST::Module*> sub_modstack(&modstack, &e.e);
Expand_Mod(is_early, crate, sub_modstack, path, e.e);
),
(Crate,
// Skip, no recursion
),
(Struct,
// TODO: Struct items
),
(Enum,
// TODO: Enum variants
),
(Trait,
// TODO: Trait definition
),
(Type,
// TODO: Do type aliases require recursion?
),
(Function,
// TODO: Recurse into function code (and types)
),
(Static,
// TODO: Recurse into static values
)
)
Expand_Attrs(i.data.attrs, (is_early ? AttrStage::EarlyPost : AttrStage::LatePost), crate, path, mod, i.data);
}
DEBUG("Impls");
for( auto& i : mod.impls() )
{
DEBUG("- " << i);
}
for( const auto& mi: mod.macro_imports_res() )
DEBUG("- Imports '" << mi.name << "'");
// 3. Post-recurse macros (everything else)
}
void Expand(::AST::Crate& crate)
{
// 1. Crate attributes
for( auto& a : crate.m_attrs.m_items )
{
for( auto& d : g_decorators ) {
if( d.first == a.name() && d.second->stage() == AttrStage::EarlyPre ) {
d.second->handle(a, crate);
}
}
}
// 2. Module attributes
for( auto& a : crate.m_attrs.m_items )
{
for( auto& d : g_decorators ) {
if( d.first == a.name() && d.second->stage() == AttrStage::EarlyPre ) {
//d.second->handle(a, crate, ::AST::Path(), crate.m_root_module, crate.m_root_module);
}
}
}
// 3. Module tree
Expand_Mod(true , crate, LList<const ::AST::Module*>(nullptr, &crate.m_root_module), ::AST::Path(), crate.m_root_module);
Expand_Mod(false, crate, LList<const ::AST::Module*>(nullptr, &crate.m_root_module), ::AST::Path(), crate.m_root_module);
// Post-process
#if 0
for( auto& a : crate.m_attrs.m_items )
{
for( auto& d : g_decorators ) {
if( d.first == a.name() && d.second->expand_before_macros() == false ) {
//d.second->handle(a, crate, ::AST::Path(), crate.m_root_module, crate.m_root_module);
}
}
}
for( auto& a : crate.m_attrs.m_items )
{
for( auto& d : g_decorators ) {
if( d.first == a.name() && d.second->expand_before_macros() == false ) {
d.second->handle(a, crate);
}
}
}
#endif
}
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