vbscript: Parse decimal literals between -1 and 1 without 0 in front.

dlls/vbscript/lex.c

@@ -393,11 +393,18 @@ static int parse_next_token(void *lval, unsigned *loc, parser_ctx_t *ctx)
         /*
          * We need to distinguish between '.' used as part of a member expression and
          * a beginning of a dot expression (a member expression accessing with statement
-         * expression).
+         * expression) and a floating point number like ".2" .
          */
         c = ctx->ptr > ctx->code ? ctx->ptr[-1] : '\n';
+        if (is_identifier_char(c) || c == ')') {
+            ctx->ptr++;
+            return '.';
+        }
+        c = ctx->ptr[1];
+        if('0' <= c && c <= '9')
+            return parse_numeric_literal(ctx, lval);
         ctx->ptr++;
-        return is_identifier_char(c) || c == ')' ? '.' : tDOT;
+        return tDOT;
     case '-':
         if(ctx->is_html && ctx->ptr[1] == '-' && ctx->ptr[2] == '>')
             return comment_line(ctx);

dlls/vbscript/tests/lang.vbs

@@ -47,6 +47,8 @@ Call ok(56.789e-2 = 0.56789, "56.789e-2 <> 0.56789")
 Call ok(1e-94938484 = 0, "1e-... <> 0")
 Call ok(34e0 = 34, "34e0 <> 34")
 Call ok(34E1 = 340, "34E0 <> 340")
+Call ok(.5 = 0.5, ".5 <> 0.5")
+Call ok(.5e1 = 5, ".5e1 <> 5")
 Call ok(--1 = 1, "--1 = " & --1)
 Call ok(-empty = 0, "-empty = " & (-empty))
 Call ok(true = -1, "! true = -1")
@@ -86,6 +88,7 @@ Call ok(getVT(null) = "VT_NULL", "getVT(null) is not VT_NULL")
 Call ok(getVT(0) = "VT_I2", "getVT(0) is not VT_I2")
 Call ok(getVT(1) = "VT_I2", "getVT(1) is not VT_I2")
 Call ok(getVT(0.5) = "VT_R8", "getVT(0.5) is not VT_R8")
+Call ok(getVT(.5) = "VT_R8", "getVT(.5) is not VT_R8")
 Call ok(getVT(0.0) = "VT_R8", "getVT(0.0) is not VT_R8")
 Call ok(getVT(2147483647) = "VT_I4", "getVT(2147483647) is not VT_I4")
 Call ok(getVT(2147483648) = "VT_R8", "getVT(2147483648) is not VT_R8")