Support + flag in #fmt

1 files changed, 27 insertions, 3 deletions

diff --git a/src/comp/front/extfmt.rs b/src/comp/front/extfmt.rs
index 3aa24a90..c05c74d1 100644
--- a/src/comp/front/extfmt.rs
+++ b/src/comp/front/extfmt.rs
@@ -29,7 +29,7 @@ import std.ExtFmt.CT.flag;
 import std.ExtFmt.CT.flag_left_justify;
 import std.ExtFmt.CT.flag_left_zero_pad;
 import std.ExtFmt.CT.flag_left_space_pad;
-import std.ExtFmt.CT.flag_plus_if_positive;
+import std.ExtFmt.CT.flag_sign_always;
 import std.ExtFmt.CT.flag_alternate;
 import std.ExtFmt.CT.count;
 import std.ExtFmt.CT.count_is;
@@ -176,6 +176,10 @@ fn pieces_to_expr(vec[piece] pieces, vec[@ast.expr] args) -> @ast.expr {
                         auto fstr = "flag_left_justify";
                         flagexprs += vec(make_rt_path_expr(sp, fstr));
                     }
+                    case (flag_sign_always) {
+                        auto fstr = "flag_sign_always";
+                        flagexprs += vec(make_rt_path_expr(sp, fstr));
+                    }
                 }
             }
 
@@ -279,6 +283,26 @@ fn pieces_to_expr(vec[piece] pieces, vec[@ast.expr] args) -> @ast.expr {
             alt (f) {
                 case (flag_left_justify) {
                 }
+                case (flag_sign_always) {
+                    auto err = "+ flag only valid in signed #fmt conversions";
+                    alt (cnv.ty) {
+                        case (ty_int(?s)) {
+                            alt (s) {
+                                case (signed) {
+                                    // Valid
+                                }
+                                case (unsigned) {
+                                    log err;
+                                    fail;
+                                }
+                            }
+                        }
+                        case (_) {
+                            log err;
+                            fail;
+                        }
+                    }
+                }
                 case (_) {
                     log unsupported;
                     fail;
@@ -361,8 +385,8 @@ fn pieces_to_expr(vec[piece] pieces, vec[@ast.expr] args) -> @ast.expr {
                 case (flag_left_space_pad) {
                     log "flag: left space pad";
                 }
-                case (flag_plus_if_positive) {
-                    log "flag: plus if positive";
+                case (flag_sign_always) {
+                    log "flag: sign always";
                 }
                 case (flag_alternate) {
                     log "flag: alternate";