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master ec870f8: Add support for Rust in etags
From: |
Lars Ingebrigtsen |
Subject: |
master ec870f8: Add support for Rust in etags |
Date: |
Mon, 17 May 2021 11:24:10 -0400 (EDT) |
branch: master
commit ec870f8986aa28b6c09c78095bbd84912471be4d
Author: Pierre-Antoine Rouby <contact@parouby.fr>
Commit: Lars Ingebrigtsen <larsi@gnus.org>
Add support for Rust in etags
* lib-src/etags.c (Rust_functions): New function to make tags for rust
files.
(Rust_help, Rust_suffixes): New constant.
* doc/emacs/maintaining.texi (Tag Syntax): Add Rust item.
* doc/man/etags.1: Add Rust (bug#46055).
---
doc/emacs/maintaining.texi | 4 ++++
doc/man/etags.1 | 2 +-
lib-src/etags.c | 51 ++++++++++++++++++++++++++++++++++++++++++++++
3 files changed, 56 insertions(+), 1 deletion(-)
diff --git a/doc/emacs/maintaining.texi b/doc/emacs/maintaining.texi
index 880829a..0065098 100644
--- a/doc/emacs/maintaining.texi
+++ b/doc/emacs/maintaining.texi
@@ -2657,6 +2657,10 @@ generate a tag.
@item
In Ruby code, @code{def} or @code{class} or @code{module} at the
beginning of a line generate a tag. Constants also generate tags.
+
+@item
+In Rust code, tags anything defined with @code{fn}, @code{enum},
+@code{struct} or @code{macro_rules!}.
@end itemize
You can also generate tags based on regexp matching (@pxref{Etags
diff --git a/doc/man/etags.1 b/doc/man/etags.1
index c5c15fb..354f6ca 100644
--- a/doc/man/etags.1
+++ b/doc/man/etags.1
@@ -51,7 +51,7 @@ format understood by
\&. Both forms of the program understand
the syntax of C, Objective C, C++, Java, Fortran, Ada, Cobol, Erlang,
Forth, Go, HTML, LaTeX, Emacs Lisp/Common Lisp, Lua, Makefile, Pascal, Perl,
-Ruby, PHP, PostScript, Python, Prolog, Scheme and
+Ruby, Rust, PHP, PostScript, Python, Prolog, Scheme and
most assembler\-like syntaxes.
Both forms read the files specified on the command line, and write a tag
table (defaults: \fBTAGS\fP for \fBetags\fP, \fBtags\fP for
diff --git a/lib-src/etags.c b/lib-src/etags.c
index b5c18e0..d703183 100644
--- a/lib-src/etags.c
+++ b/lib-src/etags.c
@@ -366,6 +366,7 @@ static void PS_functions (FILE *);
static void Prolog_functions (FILE *);
static void Python_functions (FILE *);
static void Ruby_functions (FILE *);
+static void Rust_entries (FILE *);
static void Scheme_functions (FILE *);
static void TeX_commands (FILE *);
static void Texinfo_nodes (FILE *);
@@ -752,6 +753,12 @@ a line generate a tag. Constants also generate a tag.";
static const char *Ruby_interpreters [] =
{ "ruby", NULL };
+static const char *Rust_suffixes [] =
+ { "rs", NULL };
+static const char Rust_help [] =
+ "In Rust code, tags anything defined with 'fn', 'enum', \n\
+'struct' or 'macro_rules!'.";
+
/* Can't do the `SCM' or `scm' prefix with a version number. */
static const char *Scheme_suffixes [] =
{ "oak", "sch", "scheme", "SCM", "scm", "SM", "sm", "ss", "t", NULL };
@@ -836,6 +843,7 @@ static language lang_names [] =
NULL, Python_interpreters },
{ "ruby", Ruby_help, Ruby_functions, Ruby_suffixes,
Ruby_filenames, Ruby_interpreters },
+ { "rust", Rust_help, Rust_entries, Rust_suffixes },
{ "scheme", Scheme_help, Scheme_functions, Scheme_suffixes },
{ "tex", TeX_help, TeX_commands, TeX_suffixes },
{ "texinfo", Texinfo_help, Texinfo_nodes, Texinfo_suffixes },
@@ -5021,6 +5029,49 @@ Ruby_functions (FILE *inf)
/*
+ * Rust support
+ * Look for:
+ * - fn: Function
+ * - struct: Structure
+ * - enum: Enumeration
+ * - macro_rules!: Macro
+ */
+static void
+Rust_entries (FILE *inf)
+{
+ char *cp, *name;
+ bool is_func = false;
+
+ LOOP_ON_INPUT_LINES(inf, lb, cp)
+ {
+ cp = skip_spaces(cp);
+ name = cp;
+
+ // Skip 'pub' keyworld
+ (void)LOOKING_AT (cp, "pub");
+
+ // Look for define
+ if ((is_func = LOOKING_AT (cp, "fn"))
+ || LOOKING_AT (cp, "enum")
+ || LOOKING_AT (cp, "struct")
+ || (is_func = LOOKING_AT (cp, "macro_rules!")))
+ {
+ cp = skip_spaces (cp);
+ name = cp;
+
+ while (!notinname (*cp))
+ cp++;
+
+ make_tag (name, cp - name, is_func,
+ lb.buffer, cp - lb.buffer + 1,
+ lineno, linecharno);
+ is_func = false;
+ }
+ }
+}
+
+
+/*
* PHP support
* Look for:
* - /^[ \t]*function[ \t\n]+[^ \t\n(]+/
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