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* [gcc/devel/rust/master] macros: add include! macro
@ 2022-06-08 12:32 Thomas Schwinge
0 siblings, 0 replies; only message in thread
From: Thomas Schwinge @ 2022-06-08 12:32 UTC (permalink / raw)
To: gcc-cvs
https://gcc.gnu.org/g:e753fa4e3633c6e6158ca26d930f0d1aaca15a6a
commit e753fa4e3633c6e6158ca26d930f0d1aaca15a6a
Author: liushuyu <liushuyu011@gmail.com>
Date: Sat Apr 9 02:23:16 2022 -0600
macros: add include! macro
Diff:
---
gcc/rust/expand/rust-macro-builtins.cc | 54 ++++++++++++++++++++++++++++++++++
gcc/rust/expand/rust-macro-builtins.h | 3 ++
gcc/rust/util/rust-hir-map.cc | 1 +
3 files changed, 58 insertions(+)
diff --git a/gcc/rust/expand/rust-macro-builtins.cc b/gcc/rust/expand/rust-macro-builtins.cc
index 8c68a7d41ca..e4beb953b5f 100644
--- a/gcc/rust/expand/rust-macro-builtins.cc
+++ b/gcc/rust/expand/rust-macro-builtins.cc
@@ -412,4 +412,58 @@ MacroBuiltin::cfg (Location invoc_locus, AST::MacroInvocData &invoc)
return AST::ASTFragment ({literal_exp});
}
+/* Expand builtin macro include!(), which includes a source file at the current
+ scope compile time. */
+
+AST::ASTFragment
+MacroBuiltin::include (Location invoc_locus, AST::MacroInvocData &invoc)
+{
+ /* Get target filename from the macro invocation, which is treated as a path
+ relative to the include!-ing file (currently being compiled). */
+ auto lit_expr
+ = parse_single_string_literal (invoc.get_delim_tok_tree (), invoc_locus);
+ if (lit_expr == nullptr)
+ return AST::ASTFragment::create_error ();
+
+ std::string target_filename
+ = source_relative_path (lit_expr->as_string (), invoc_locus);
+
+ RAIIFile target_file (target_filename.c_str ());
+ Linemap *linemap = Session::get_instance ().linemap;
+
+ if (target_file.get_raw () == nullptr)
+ {
+ rust_error_at (lit_expr->get_locus (), "cannot open included file %s: %m",
+ target_filename.c_str ());
+ return AST::ASTFragment::create_error ();
+ }
+
+ rust_debug ("Attempting to parse included file %s", target_filename.c_str ());
+
+ Lexer lex (target_filename.c_str (), std::move (target_file), linemap);
+ Parser<Lexer> parser (std::move (lex));
+
+ auto parsed_items = parser.parse_items ();
+ bool has_error = !parser.get_errors ().empty ();
+
+ for (const auto &error : parser.get_errors ())
+ error.emit_error ();
+
+ if (has_error)
+ {
+ // inform the user that the errors above are from a included file
+ rust_inform (invoc_locus, "included from here");
+ return AST::ASTFragment::create_error ();
+ }
+
+ std::vector<AST::SingleASTNode> nodes{};
+ for (auto &item : parsed_items)
+ {
+ AST::SingleASTNode node (std::move (item));
+ nodes.push_back (node);
+ }
+
+ return AST::ASTFragment (nodes);
+}
+
} // namespace Rust
diff --git a/gcc/rust/expand/rust-macro-builtins.h b/gcc/rust/expand/rust-macro-builtins.h
index e284c032e1d..f1d10df1ba2 100644
--- a/gcc/rust/expand/rust-macro-builtins.h
+++ b/gcc/rust/expand/rust-macro-builtins.h
@@ -95,6 +95,9 @@ public:
static AST::ASTFragment cfg (Location invoc_locus,
AST::MacroInvocData &invoc);
+
+ static AST::ASTFragment include (Location invoc_locus,
+ AST::MacroInvocData &invoc);
};
} // namespace Rust
diff --git a/gcc/rust/util/rust-hir-map.cc b/gcc/rust/util/rust-hir-map.cc
index e9ad87c5560..b08258c269c 100644
--- a/gcc/rust/util/rust-hir-map.cc
+++ b/gcc/rust/util/rust-hir-map.cc
@@ -757,6 +757,7 @@ Mappings::insert_macro_def (AST::MacroRulesDefinition *macro)
{"concat", MacroBuiltin::concat},
{"env", MacroBuiltin::env},
{"cfg", MacroBuiltin::cfg},
+ {"include", MacroBuiltin::include},
};
auto builtin = builtin_macros.find (macro->get_rule_name ());
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