1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
|
#include <synext.hpp>
#include "../ast/expr.hpp"
#include "../ast/ast.hpp"
#include "../parse/common.hpp"
#include "macro_rules.hpp"
class CMacroRulesExpander:
public ExpandProcMacro
{
bool expand_early() const override { return true; }
::std::unique_ptr<TokenStream> expand(const ::std::string& ident, const TokenTree& tt, AST::Module& mod) override
{
if( ident == "" ) {
throw ::std::runtime_error( "ERROR: macro_rules! requires an identifier" );
}
TTStream lex(tt);
auto mac = Parse_MacroRules(lex);
// TODO: Place into current module using `ident` as the name
mod.add_macro( false, ident, mac );
static TokenTree empty_tt;
return box$( TTStream(empty_tt) );
}
};
class CMacroUseHandler:
public ExpandDecorator
{
AttrStage stage() const override { return AttrStage::EarlyPost; }
void handle(const AST::MetaItem& mi, AST::Crate& crate, const AST::Path& path, AST::Module& mod, AST::Item& i) const override
{
TRACE_FUNCTION_F("path=" << path);
if( !i.is_Module() )
throw ::std::runtime_error("ERROR: Use of #[macro_use] on non-module");
const auto& submod = i.as_Module().e;
if( mi.has_sub_items() )
{
throw ::std::runtime_error("TODO: #[macro_use]");
}
else
{
for( const auto& mr : submod.macros() )
{
DEBUG("Imported " << mr.name);
mod.add_macro_import( mr.name, mr.data );
}
for( const auto& mri : submod.macro_imports_res() )
{
DEBUG("Imported " << mri.name << " (propagate)");
mod.add_macro_import( mri.name, *mri.data );
}
}
}
};
::std::unique_ptr<TokenStream> Macro_Invoke(const char* name, const MacroRules& rules, const TokenTree& tt, AST::Module& mod)
{
return Macro_InvokeRules(name, rules, tt);
}
STATIC_MACRO("macro_rules", CMacroRulesExpander);
STATIC_DECORATOR("macro_use", CMacroUseHandler);
|
