Move extfmt parsing into standard library

1 files changed, 1 insertions, 210 deletions

diff --git a/src/comp/front/extfmt.rs b/src/comp/front/extfmt.rs
index 22c43bc9..aecd7934 100644
--- a/src/comp/front/extfmt.rs
+++ b/src/comp/front/extfmt.rs
@@ -50,6 +50,7 @@ import std.ExtFmt.conv;
 import std.ExtFmt.piece;
 import std.ExtFmt.piece_string;
 import std.ExtFmt.piece_conv;
+import std.ExtFmt.parse_fmt_string;
 
 export expand_syntax_ext;
 
@@ -87,216 +88,6 @@ fn expr_to_str(@ast.expr expr) -> str {
     fail;
 }
 
-fn parse_fmt_string(str s) -> vec[piece] {
-    let vec[piece] pieces = vec();
-    auto lim = _str.byte_len(s);
-    auto buf = "";
-
-    fn flush_buf(str buf, &vec[piece] pieces) -> str {
-        if (_str.byte_len(buf) > 0u) {
-            auto piece = piece_string(buf);
-            pieces += vec(piece);
-        }
-        ret "";
-    }
-
-    auto i = 0u;
-    while (i < lim) {
-        auto curr = _str.substr(s, i, 1u);
-        if (_str.eq(curr, "%")) {
-            i += 1u;
-            if (i >= lim) {
-                log "unterminated conversion at end of string";
-                fail;
-            }
-            auto curr2 = _str.substr(s, i, 1u);
-            if (_str.eq(curr2, "%")) {
-                i += 1u;
-            } else {
-                buf = flush_buf(buf, pieces);
-                auto res = parse_conversion(s, i, lim);
-                pieces += vec(res._0);
-                i = res._1;
-            }
-        } else {
-            buf += curr;
-            i += 1u;
-        }
-    }
-    buf = flush_buf(buf, pieces);
-    ret pieces;
-}
-
-fn peek_num(str s, uint i, uint lim) -> option.t[tup(uint, uint)] {
-    if (i >= lim) {
-        ret none[tup(uint, uint)];
-    }
-
-    auto c = s.(i);
-    if (!('0' as u8 <= c && c <= '9' as u8)) {
-        ret option.none[tup(uint, uint)];
-    }
-
-    auto n = (c - ('0' as u8)) as uint;
-    alt (peek_num(s, i + 1u, lim)) {
-        case (none[tup(uint, uint)]) {
-            ret some[tup(uint, uint)](tup(n, i + 1u));
-        }
-        case (some[tup(uint, uint)](?next)) {
-            auto m = next._0;
-            auto j = next._1;
-            ret some[tup(uint, uint)](tup(n * 10u + m, j));
-        }
-    }
-
-}
-
-fn parse_conversion(str s, uint i, uint lim) -> tup(piece, uint) {
-    auto parm = parse_parameter(s, i, lim);
-    auto flags = parse_flags(s, parm._1, lim);
-    auto width = parse_count(s, flags._1, lim);
-    auto prec = parse_precision(s, width._1, lim);
-    auto ty = parse_type(s, prec._1, lim);
-    ret tup(piece_conv(rec(param = parm._0,
-                           flags = flags._0,
-                           width = width._0,
-                           precision = prec._0,
-                           ty = ty._0)),
-            ty._1);
-}
-
-fn parse_parameter(str s, uint i, uint lim) -> tup(option.t[int], uint) {
-    if (i >= lim) {
-        ret tup(none[int], i);
-    }
-
-    auto num = peek_num(s, i, lim);
-    alt (num) {
-        case (none[tup(uint, uint)]) {
-            ret tup(none[int], i);
-        }
-        case (some[tup(uint, uint)](?t)) {
-            auto n = t._0;
-            auto j = t._1;
-            if (j < lim && s.(j) == '$' as u8) {
-                ret tup(some[int](n as int), j + 1u);
-            }
-            else {
-                ret tup(none[int], i);
-            }
-        }
-    }
-}
-
-fn parse_flags(str s, uint i, uint lim) -> tup(vec[flag], uint) {
-    let vec[flag] noflags = vec();
-
-    if (i >= lim) {
-        ret tup(noflags, i);
-    }
-
-    fn more_(flag f, str s, uint i, uint lim) -> tup(vec[flag], uint) {
-        auto next = parse_flags(s, i + 1u, lim);
-        auto rest = next._0;
-        auto j = next._1;
-        let vec[flag] curr = vec(f);
-        ret tup(curr + rest, j);
-    }
-
-    auto more = bind more_(_, s, i, lim);
-
-    auto f = s.(i);
-    if (f == ('-' as u8)) {
-        ret more(flag_left_justify);
-    } else if (f == ('0' as u8)) {
-        ret more(flag_left_zero_pad);
-    } else if (f == (' ' as u8)) {
-        ret more(flag_left_space_pad);
-    } else if (f == ('+' as u8)) {
-        ret more(flag_plus_if_positive);
-    } else if (f == ('#' as u8)) {
-        ret more(flag_alternate);
-    } else {
-        ret tup(noflags, i);
-    }
-}
-
-fn parse_count(str s, uint i, uint lim) -> tup(count, uint) {
-    if (i >= lim) {
-        ret tup(count_implied, i);
-    }
-
-    if (s.(i) == ('*' as u8)) {
-        auto param = parse_parameter(s, i + 1u, lim);
-        auto j = param._1;
-        alt (param._0) {
-            case (none[int]) {
-                ret tup(count_is_next_param, j);
-            }
-            case (some[int](?n)) {
-                ret tup(count_is_param(n), j);
-            }
-        }
-    } else {
-        auto num = peek_num(s, i, lim);
-        alt (num) {
-            case (none[tup(uint, uint)]) {
-                ret tup(count_implied, i);
-            }
-            case (some[tup(uint, uint)](?num)) {
-                ret tup(count_is(num._0 as int), num._1);
-            }
-        }
-    }
-}
-
-fn parse_precision(str s, uint i, uint lim) -> tup(count, uint) {
-    if (i >= lim) {
-        ret tup(count_implied, i);
-    }
-
-    if (s.(i) == '.' as u8) {
-        ret parse_count(s, i + 1u, lim);
-    } else {
-        ret tup(count_implied, i);
-    }
-}
-
-fn parse_type(str s, uint i, uint lim) -> tup(ty, uint) {
-    if (i >= lim) {
-        log "missing type in conversion";
-        fail;
-    }
-
-    auto t;
-    auto tstr = _str.substr(s, i, 1u);
-    if (_str.eq(tstr, "b")) {
-        t = ty_bool;
-    } else if (_str.eq(tstr, "s")) {
-        t = ty_str;
-    } else if (_str.eq(tstr, "c")) {
-        t = ty_char;
-    } else if (_str.eq(tstr, "d")
-               || _str.eq(tstr, "i")) {
-        // TODO: Do we really want two signed types here?
-        // How important is it to be printf compatible?
-        t = ty_int(signed);
-    } else if (_str.eq(tstr, "u")) {
-        t = ty_int(unsigned);
-    } else if (_str.eq(tstr, "x")) {
-        t = ty_hex(case_lower);
-    } else if (_str.eq(tstr, "X")) {
-        t = ty_hex(case_upper);
-    } else if (_str.eq(tstr, "t")) {
-        t = ty_bits;
-    } else {
-        log "unknown type in conversion";
-        fail;
-    }
-
-    ret tup(t, i + 1u);
-}
-
 fn pieces_to_expr(vec[piece] pieces, vec[@ast.expr] args) -> @ast.expr {
 
     fn make_new_lit(common.span sp, ast.lit_ lit) -> @ast.expr {