blob: cd9165a6f1086422c00bacf7af6b74c5ca1ae322 (
plain)
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
72
73
74
75
76
77
78
79
80
81
82
83
84
85
|
// Copyright (C) 2020-2022 Free Software Foundation, Inc.
// This file is part of GCC.
// GCC is free software; you can redistribute it and/or modify it under
// the terms of the GNU General Public License as published by the Free
// Software Foundation; either version 3, or (at your option) any later
// version.
// GCC is distributed in the hope that it will be useful, but WITHOUT ANY
// WARRANTY; without even the implied warranty of MERCHANTABILITY or
// FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
// for more details.
// You should have received a copy of the GNU General Public License
// along with GCC; see the file COPYING3. If not see
// <http://www.gnu.org/licenses/>.
#ifndef RUST_MACRO_EXPAND_H
#define RUST_MACRO_EXPAND_H
#include "rust-ast.h"
#include "rust-macro.h"
// Provides objects and method prototypes for macro expansion
namespace Rust {
// forward decls for AST
namespace AST {
class MacroInvocation;
}
// Object used to store configuration data for macro expansion.
// NOTE: Keep all these items complying with the latest rustc.
struct ExpansionCfg
{
// features?
// TODO: Add `features' when we have it.
unsigned int recursion_limit = 1024;
bool trace_mac = false; // trace macro
bool should_test = false; // strip #[test] nodes if false
bool keep_macs = false; // keep macro definitions
std::string crate_name = "";
};
// Object used to store shared data (between functions) for macro expansion.
struct MacroExpander
{
ExpansionCfg cfg;
unsigned int expansion_depth = 0;
MacroExpander (AST::Crate &crate, ExpansionCfg cfg, Session &session)
: cfg (cfg), crate (crate), session (session)
{}
~MacroExpander () = default;
// Expands all macros in the crate passed in.
void expand_crate ();
/* Expands a macro invocation (not macro invocation semi) - possibly make both
* have similar duck-typed interface and use templates?*/
// should this be public or private?
void expand_invoc (std::unique_ptr<AST::MacroInvocation> &invoc);
// Expands a single declarative macro.
AST::ASTFragment expand_decl_macro (AST::MacroInvocData &invoc,
AST::MacroRulesDefinition &rules_def);
void expand_cfg_attrs (AST::AttrVec &attrs);
bool fails_cfg (const AST::AttrVec &attr) const;
bool fails_cfg_with_expand (AST::AttrVec &attrs) const;
// Expand the data of a cfg! macro.
void parse_macro_to_meta_item (AST::MacroInvocData &invoc);
// Get the literal representation of a cfg! macro.
AST::Literal expand_cfg_macro (AST::MacroInvocData &invoc);
private:
AST::Crate &crate;
Session &session;
};
} // namespace Rust
#endif
|
