Remove the log keyword (by renaming it to __log)

We can't quite remove logging from the language, but this hides the
keyword.

Author: brson

src/libsyntax/ext/expand.rs

@@ -411,34 +411,34 @@ pub fn core_macros() -> ~str {
 
     macro_rules! error (
         ($arg:expr) => (
-            log(1u32, fmt!( \"%?\", $arg ))
+            __log(1u32, fmt!( \"%?\", $arg ))
         );
         ($( $arg:expr ),+) => (
-            log(1u32, fmt!( $($arg),+ ))
+            __log(1u32, fmt!( $($arg),+ ))
         )
     )
     macro_rules! warn (
         ($arg:expr) => (
-            log(2u32, fmt!( \"%?\", $arg ))
+            __log(2u32, fmt!( \"%?\", $arg ))
         );
         ($( $arg:expr ),+) => (
-            log(2u32, fmt!( $($arg),+ ))
+            __log(2u32, fmt!( $($arg),+ ))
         )
     )
     macro_rules! info (
         ($arg:expr) => (
-            log(3u32, fmt!( \"%?\", $arg ))
+            __log(3u32, fmt!( \"%?\", $arg ))
         );
         ($( $arg:expr ),+) => (
-            log(3u32, fmt!( $($arg),+ ))
+            __log(3u32, fmt!( $($arg),+ ))
         )
     )
     macro_rules! debug (
         ($arg:expr) => (
-            log(4u32, fmt!( \"%?\", $arg ))
+            __log(4u32, fmt!( \"%?\", $arg ))
         );
         ($( $arg:expr ),+) => (
-            log(4u32, fmt!( $($arg),+ ))
+            __log(4u32, fmt!( $($arg),+ ))
         )
     )
 

src/libsyntax/parse/parser.rs

@@ -1184,7 +1184,7 @@ pub impl Parser {
                 }
             }
             hi = self.span.hi;
-        } else if self.eat_keyword(&~"log") {
+        } else if self.eat_keyword(&~"__log") {
             self.expect(&token::LPAREN);
             let lvl = self.parse_expr();
             self.expect(&token::COMMA);

src/libsyntax/parse/token.rs

@@ -495,7 +495,7 @@ pub fn strict_keyword_table() -> HashMap<~str, ()> {
         ~"else", ~"enum", ~"extern",
         ~"false", ~"fn", ~"for",
         ~"if", ~"impl",
-        ~"let", ~"log", ~"loop",
+        ~"let", ~"__log", ~"loop",
         ~"match", ~"mod", ~"mut",
         ~"once",
         ~"priv", ~"pub", ~"pure",