Revert "More work on lexer.rs: start using keyword hashtable, handle more lexemes." due to tinderbox bustage

This reverts commit 9f0eaa65817303b8768c80454734144c176fda43.

3 files changed, 17 insertions, 150 deletions

diff --git a/src/comp/fe/lexer.rs b/src/comp/fe/lexer.rs
index 591dfd71..c94a57d1 100644
--- a/src/comp/fe/lexer.rs
+++ b/src/comp/fe/lexer.rs
@@ -2,7 +2,6 @@ import std._io.stdio_reader;
 import std._str;
 import std.map;
 import std.map.hashmap;
-import util.common;
 
 fn new_str_hash[V]() -> map.hashmap[str,V] {
     let map.hashfn[str] hasher = _str.hash;
@@ -96,80 +95,6 @@ fn new_reader(stdio_reader rdr, str filename) -> reader
     keywords.insert("ret", token.RET());
     keywords.insert("be", token.BE());
 
-    keywords.insert("fail", token.FAIL());
-    keywords.insert("drop", token.DROP());
-
-    keywords.insert("type", token.TYPE());
-    keywords.insert("check", token.CHECK());
-    keywords.insert("claim", token.CLAIM());
-    keywords.insert("prove", token.PROVE());
-
-    keywords.insert("io", token.IO());
-    keywords.insert("state", token.STATE());
-    keywords.insert("unsafe", token.UNSAFE());
-
-    keywords.insert("native", token.NATIVE());
-    keywords.insert("mutable", token.MUTABLE());
-    keywords.insert("auto", token.AUTO());
-
-    keywords.insert("fn", token.FN());
-    keywords.insert("iter", token.ITER());
-
-    keywords.insert("import", token.IMPORT());
-    keywords.insert("export", token.EXPORT());
-
-    keywords.insert("let", token.LET());
-
-    keywords.insert("log", token.LOG());
-    keywords.insert("spawn", token.SPAWN());
-    keywords.insert("thread", token.THREAD());
-    keywords.insert("yield", token.YIELD());
-    keywords.insert("join", token.JOIN());
-
-    keywords.insert("bool", token.BOOL());
-
-    keywords.insert("int", token.INT());
-    keywords.insert("uint", token.UINT());
-    keywords.insert("float", token.FLOAT());
-
-    keywords.insert("char", token.CHAR());
-    keywords.insert("str", token.STR());
-
-
-    keywords.insert("rec", token.REC());
-    keywords.insert("tup", token.TUP());
-    keywords.insert("tag", token.TAG());
-    keywords.insert("vec", token.VEC());
-    keywords.insert("any", token.ANY());
-
-    keywords.insert("obj", token.OBJ());
-
-    keywords.insert("port", token.PORT());
-    keywords.insert("chan", token.CHAN());
-
-    keywords.insert("task", token.TASK());
-
-    keywords.insert("true", token.LIT_BOOL(true));
-    keywords.insert("false", token.LIT_BOOL(false));
-
-    keywords.insert("in", token.IN());
-
-    keywords.insert("as", token.AS());
-    keywords.insert("with", token.WITH());
-
-    keywords.insert("bind", token.BIND());
-
-    keywords.insert("u8", token.MACH(common.ty_u8()));
-    keywords.insert("u16", token.MACH(common.ty_u16()));
-    keywords.insert("u32", token.MACH(common.ty_u32()));
-    keywords.insert("u64", token.MACH(common.ty_u64()));
-    keywords.insert("i8", token.MACH(common.ty_i8()));
-    keywords.insert("i16", token.MACH(common.ty_i16()));
-    keywords.insert("i32", token.MACH(common.ty_i32()));
-    keywords.insert("i64", token.MACH(common.ty_i64()));
-    keywords.insert("f32", token.MACH(common.ty_f32()));
-    keywords.insert("f64", token.MACH(common.ty_f64()));
-
     ret reader(rdr, filename, rdr.getc() as char, rdr.getc() as char,
                1u, 1u, keywords, reserved);
 }
@@ -200,31 +125,6 @@ fn is_bin_digit(char c) -> bool {
     ret c == '0' || c == '1';
 }
 
-fn dec_digit_val(char c) -> int {
-    ret (c as int) - ('0' as int);
-}
-
-fn hex_digit_val(char c) -> int {
-    if (in_range(c, '0', '9')) {
-        ret (c as int) - ('0' as int);
-    }
-
-    if (in_range(c, 'a', 'f')) {
-        ret (c as int) - ('a' as int);
-    }
-
-    if (in_range(c, 'A', 'F')) {
-        ret (c as int) - ('A' as int);
-    }
-
-    fail;
-}
-
-fn bin_digit_value(char c) -> int {
-    if (c == 0) { ret 0; }
-    ret 1;
-}
-
 fn is_whitespace(char c) -> bool {
     ret c == ' ' || c == '\t' || c == '\r' || c == '\n';
 }
@@ -259,54 +159,27 @@ fn next_token(reader rdr) -> token.token {
     auto c = rdr.curr();
 
     if (is_alpha(c)) {
-        while (is_alpha(c) || c == '_') {
+        while (is_alpha(rdr.curr())) {
+            c = rdr.curr();
             accum_str += (c as u8);
             rdr.bump();
-            c = rdr.curr();
         }
-
-        auto kwds = rdr.get_keywords();
-        if (kwds.contains_key(accum_str)) {
-            ret kwds.get(accum_str);
-        }
-
         ret token.IDENT(accum_str);
     }
 
     if (is_dec_digit(c)) {
-        auto n = rdr.next();
-        if (c == '0' && n == 'x') {
-            rdr.bump();
-            rdr.bump();
-            c = rdr.curr();
-            while (is_hex_digit(c) || c == '_') {
-                accum_int *= 16;
-                accum_int += hex_digit_val(v);
-                rdr.bump();
+        if (c == '0') {
+            log "fixme: leading zero";
+            fail;
+        } else {
+            while (is_dec_digit(c)) {
                 c = rdr.curr();
-            }
-        }
-
-        if (c == '0' && n == 'b') {
-            rdr.bump();
-            rdr.bump();
-            c = rdr.curr();
-            while (is_hex_digit(c) || c == '_') {
-                accum_int *= 2;
-                accum_int += bit_value(c);
+                accum_int *= 10;
+                accum_int += (c as int) - ('0' as int);
                 rdr.bump();
-                c = rdr.curr();
             }
+            ret token.LIT_INT(accum_int);
         }
-
-        while (is_dec_digit(c) || c == '_') {
-            accum_int *= 10;
-            accum_int += dec_digit_val(v);
-            rdr.bump();
-            c = rdr.curr();
-        }
-
-        ret token.LIT_INT(accum_int);
     }
 
 
@@ -333,7 +206,6 @@ fn next_token(reader rdr) -> token.token {
         case (']') { rdr.bump(); ret token.RBRACKET(); }
         case ('@') { rdr.bump(); ret token.AT(); }
         case ('#') { rdr.bump(); ret token.POUND(); }
-        case ('_') { rdr.bump(); ret token.UNDERSCORE(); }
 
         // Multi-byte tokens.
         case ('=') {
diff --git a/src/comp/fe/token.rs b/src/comp/fe/token.rs
index 2ec492fa..5e8171bc 100644
--- a/src/comp/fe/token.rs
+++ b/src/comp/fe/token.rs
@@ -275,9 +275,8 @@ fn to_str(token t) -> str {
         }
         case (LIT_CHAR(c)) {
             // FIXME: escape and encode.
-            auto tmp = "'";
-            tmp += c as u8;
-            tmp += '\'' as u8;
+            auto tmp = "";
+            tmp += (c as u8);
             ret tmp;
         }
 
@@ -286,7 +285,7 @@ fn to_str(token t) -> str {
         }
 
         /* Name components */
-        case (IDENT(s)) { auto si = "ident:"; si += s; ret si; }
+        case (IDENT(s)) { ret s; }
         case (IDX(i)) { ret "_" + _int.to_str(i, 10u); }
         case (UNDERSCORE()) { ret "_"; }
 
diff --git a/src/comp/util/common.rs b/src/comp/util/common.rs
index 51d843b4..3089c2c1 100644
--- a/src/comp/util/common.rs
+++ b/src/comp/util/common.rs
@@ -1,22 +1,18 @@
 
 type ty_mach = tag( ty_i8(), ty_i16(), ty_i32(), ty_i64(),
                     ty_u8(), ty_u16(), ty_u32(), ty_u64(),
-                    ty_f32(), ty_f64() );
+                    ty_f32(), ty_f16() );
 
 fn ty_mach_to_str(ty_mach tm) -> str {
     alt (tm) {
         case (ty_u8()) { ret "u8"; }
-        case (ty_u16()) { ret "u16"; }
-        case (ty_u32()) { ret "u32"; }
-        case (ty_u64()) { ret "u64"; }
-
         case (ty_i8()) { ret "i8"; }
+        case (ty_u16()) { ret "u16"; }
         case (ty_i16()) { ret "i16"; }
+        case (ty_u32()) { ret "u32"; }
         case (ty_i32()) { ret "i32"; }
+        case (ty_u64()) { ret "u64"; }
         case (ty_i64()) { ret "i64"; }
-
-        case (ty_f32()) { ret "f32"; }
-        case (ty_f64()) { ret "f64"; }
     }
 }