auto merge of #14554 : kmcallister/rust/plugin_registrar, r=cmr

This implements the design in rust-lang/rfcs#86.  It shouldn't be merged until that RFC is accepted, but it would be great if somebody has time to review the code before then.

Author: bors

mk/crates.mk

@@ -83,16 +83,16 @@ DEPS_uuid := std serialize
 DEPS_sync := std alloc
 DEPS_getopts := std
 DEPS_collections := core alloc
-DEPS_fourcc := syntax std
-DEPS_hexfloat := syntax std
+DEPS_fourcc := rustc syntax std
+DEPS_hexfloat := rustc syntax std
 DEPS_num := std
 DEPS_test := std getopts serialize term time regex native:rust_test_helpers
 DEPS_time := std serialize sync
 DEPS_rand := core
 DEPS_url := std
 DEPS_log := std sync
 DEPS_regex := std
-DEPS_regex_macros = syntax std regex
+DEPS_regex_macros = rustc syntax std regex
 DEPS_fmt_macros = std
 
 TOOL_DEPS_compiletest := test green rustuv getopts

src/compiletest/compiletest.rs

@@ -18,11 +18,17 @@
 
 extern crate test;
 extern crate getopts;
-#[phase(link, syntax)]
-extern crate log;
 extern crate green;
 extern crate rustuv;
 
+#[cfg(stage0)]
+#[phase(syntax, link)]
+extern crate log;
+
+#[cfg(not(stage0))]
+#[phase(plugin, link)]
+extern crate log;
+
 extern crate regex;
 
 use std::os;

src/doc/rust.md

@@ -1819,9 +1819,8 @@ type int8_t = i8;
 
 ### Function-only attributes
 
-- `macro_registrar` - when using loadable syntax extensions, mark this
-  function as the registration point for the current crate's syntax
-  extensions.
+- `plugin_registrar` - mark this function as the registration point for
+  compiler plugins, such as loadable syntax extensions.
 - `main` - indicates that this function should be passed to the entry point,
   rather than the function in the crate root named `main`.
 - `start` - indicates that this function should be used as the entry point,
@@ -4098,7 +4097,7 @@ that demonstrates all four of them:
 
 ~~~~
 #![feature(phase)]
-#[phase(syntax, link)] extern crate log;
+#[phase(plugin, link)] extern crate log;
 
 fn main() {
     error!("This is an error log")

src/liballoc/lib.rs

@@ -70,8 +70,14 @@
 #![no_std]
 #![feature(phase)]
 
+#[cfg(stage0)]
 #[phase(syntax, link)]
 extern crate core;
+
+#[cfg(not(stage0))]
+#[phase(plugin, link)]
+extern crate core;
+
 extern crate libc;
 
 
@@ -80,8 +86,10 @@ extern crate libc;
 #[cfg(test)] extern crate debug;
 #[cfg(test)] extern crate sync;
 #[cfg(test)] extern crate native;
-#[cfg(test)] #[phase(syntax, link)] extern crate std;
-#[cfg(test)] #[phase(syntax, link)] extern crate log;
+#[cfg(test, stage0)] #[phase(syntax, link)] extern crate std;
+#[cfg(test, stage0)] #[phase(syntax, link)] extern crate log;
+#[cfg(test, not(stage0))] #[phase(plugin, link)] extern crate std;
+#[cfg(test, not(stage0))] #[phase(plugin, link)] extern crate log;
 
 // Heaps provided for low-level allocation strategies
 

src/libcollections/lib.rs

@@ -23,14 +23,24 @@
 #![feature(macro_rules, managed_boxes, default_type_params, phase, globs)]
 #![no_std]
 
-#[phase(syntax, link)] extern crate core;
 extern crate alloc;
 
+#[cfg(stage0)]
+#[phase(syntax, link)]
+extern crate core;
+
+#[cfg(not(stage0))]
+#[phase(plugin, link)]
+extern crate core;
+
 #[cfg(test)] extern crate native;
 #[cfg(test)] extern crate test;
 #[cfg(test)] extern crate debug;
-#[cfg(test)] #[phase(syntax, link)] extern crate std;
-#[cfg(test)] #[phase(syntax, link)] extern crate log;
+
+#[cfg(test, stage0)] #[phase(syntax, link)] extern crate std;
+#[cfg(test, stage0)] #[phase(syntax, link)] extern crate log;
+#[cfg(test, not(stage0))] #[phase(plugin, link)] extern crate std;
+#[cfg(test, not(stage0))] #[phase(plugin, link)] extern crate log;
 
 use core::prelude::*;
 

src/libflate/lib.rs

@@ -28,7 +28,8 @@ Simple [DEFLATE][def]-based compression. This is a wrapper around the
 #![feature(phase)]
 #![deny(deprecated_owned_vector)]
 
-#[cfg(test)] #[phase(syntax, link)] extern crate log;
+#[cfg(test, stage0)] #[phase(syntax, link)] extern crate log;
+#[cfg(test, not(stage0))] #[phase(plugin, link)] extern crate log;
 
 extern crate libc;
 

src/libfourcc/lib.rs

@@ -22,7 +22,7 @@ to be `big`, i.e. left-to-right order. It returns a u32.
 To load the extension and use it:
 
 ```rust,ignore
-#[phase(syntax)]
+#[phase(plugin)]
 extern crate fourcc;
 
 fn main() {
@@ -48,29 +48,25 @@ fn main() {
        html_root_url = "http://doc.rust-lang.org/")]
 
 #![deny(deprecated_owned_vector)]
-#![feature(macro_registrar, managed_boxes)]
+#![feature(plugin_registrar, managed_boxes)]
 
 extern crate syntax;
+extern crate rustc;
 
 use syntax::ast;
-use syntax::ast::Name;
 use syntax::attr::contains;
 use syntax::codemap::{Span, mk_sp};
 use syntax::ext::base;
-use syntax::ext::base::{SyntaxExtension, BasicMacroExpander, NormalTT, ExtCtxt, MacExpr};
+use syntax::ext::base::{ExtCtxt, MacExpr};
 use syntax::ext::build::AstBuilder;
 use syntax::parse;
 use syntax::parse::token;
 use syntax::parse::token::InternedString;
+use rustc::plugin::Registry;
 
-#[macro_registrar]
-pub fn macro_registrar(register: |Name, SyntaxExtension|) {
-    register(token::intern("fourcc"),
-        NormalTT(box BasicMacroExpander {
-            expander: expand_syntax_ext,
-            span: None,
-        },
-        None));
+#[plugin_registrar]
+pub fn plugin_registrar(reg: &mut Registry) {
+    reg.register_macro("fourcc", expand_syntax_ext);
 }
 
 pub fn expand_syntax_ext(cx: &mut ExtCtxt, sp: Span, tts: &[ast::TokenTree])

src/libgetopts/lib.rs

@@ -91,7 +91,8 @@
 #![deny(deprecated_owned_vector)]
 
 #[cfg(test)] extern crate debug;
-#[cfg(test)] #[phase(syntax, link)] extern crate log;
+#[cfg(test, stage0)] #[phase(syntax, link)] extern crate log;
+#[cfg(test, not(stage0))] #[phase(plugin, link)] extern crate log;
 
 use std::cmp::PartialEq;
 use std::result::{Err, Ok};

src/libgreen/lib.rs

@@ -148,7 +148,7 @@
 //!
 //! ```
 //! #![feature(phase)]
-//! #[phase(syntax)] extern crate green;
+//! #[phase(plugin)] extern crate green;
 //!
 //! green_start!(main)
 //!
@@ -211,7 +211,7 @@
 #![allow(visible_private_types)]
 #![deny(deprecated_owned_vector)]
 
-#[cfg(test)] #[phase(syntax, link)] extern crate log;
+#[cfg(test)] #[phase(plugin, link)] extern crate log;
 #[cfg(test)] extern crate rustuv;
 extern crate libc;
 extern crate alloc;
@@ -249,7 +249,7 @@ pub mod task;
 ///
 /// ```
 /// #![feature(phase)]
-/// #[phase(syntax)] extern crate green;
+/// #[phase(plugin)] extern crate green;
 ///
 /// green_start!(main)
 ///

src/libhexfloat/lib.rs

@@ -21,7 +21,7 @@ literal.
 To load the extension and use it:
 
 ```rust,ignore
-#[phase(syntax)]
+#[phase(plugin)]
 extern crate hexfloat;
 
 fn main() {
@@ -45,27 +45,23 @@ fn main() {
        html_root_url = "http://doc.rust-lang.org/")]
 
 #![deny(deprecated_owned_vector)]
-#![feature(macro_registrar, managed_boxes)]
+#![feature(plugin_registrar, managed_boxes)]
 
 extern crate syntax;
+extern crate rustc;
 
 use syntax::ast;
-use syntax::ast::Name;
 use syntax::codemap::{Span, mk_sp};
 use syntax::ext::base;
-use syntax::ext::base::{SyntaxExtension, BasicMacroExpander, NormalTT, ExtCtxt, MacExpr};
+use syntax::ext::base::{ExtCtxt, MacExpr};
 use syntax::ext::build::AstBuilder;
 use syntax::parse;
 use syntax::parse::token;
+use rustc::plugin::Registry;
 
-#[macro_registrar]
-pub fn macro_registrar(register: |Name, SyntaxExtension|) {
-    register(token::intern("hexfloat"),
-        NormalTT(box BasicMacroExpander {
-            expander: expand_syntax_ext,
-            span: None,
-        },
-        None));
+#[plugin_registrar]
+pub fn plugin_registrar(reg: &mut Registry) {
+    reg.register_macro("hexfloat", expand_syntax_ext);
 }
 
 //Check if the literal is valid (as LLVM expects),