Don't match garbage characters at the end of date strings

Addresses #15.

1 files changed, 28 insertions, 26 deletions

diff --git a/src/isodate/isodates.py b/src/isodate/isodates.py
index 6660245..a58a2c0 100644
--- a/src/isodate/isodates.py
+++ b/src/isodate/isodates.py
@@ -67,50 +67,52 @@ def build_date_regexps(yeardigits=4, expanded=False):
             sign = 1
         else:
             sign = 0
+        def add_re(regex_text):
+            cache_entry.append(re.compile('\A' + regex_text + '\Z'))
         # 1. complete dates:
         #    YYYY-MM-DD or +- YYYYYY-MM-DD... extended date format
-        cache_entry.append(re.compile(r"(?P<sign>[+-]){%d}(?P<year>[0-9]{%d})"
-                                      r"-(?P<month>[0-9]{2})-(?P<day>[0-9]{2})"
-                                      % (sign, yeardigits)))
+        add_re(r"(?P<sign>[+-]){%d}(?P<year>[0-9]{%d})"
+               r"-(?P<month>[0-9]{2})-(?P<day>[0-9]{2})"
+               % (sign, yeardigits))
         #    YYYYMMDD or +- YYYYYYMMDD... basic date format
-        cache_entry.append(re.compile(r"(?P<sign>[+-]){%d}(?P<year>[0-9]{%d})"
-                                      r"(?P<month>[0-9]{2})(?P<day>[0-9]{2})"
-                                      % (sign, yeardigits)))
+        add_re(r"(?P<sign>[+-]){%d}(?P<year>[0-9]{%d})"
+               r"(?P<month>[0-9]{2})(?P<day>[0-9]{2})"
+               % (sign, yeardigits))
         # 2. complete week dates:
         #    YYYY-Www-D or +-YYYYYY-Www-D ... extended week date
-        cache_entry.append(re.compile(r"(?P<sign>[+-]){%d}(?P<year>[0-9]{%d})"
-                                      r"-W(?P<week>[0-9]{2})-(?P<day>[0-9]{1})"
-                                      % (sign, yeardigits)))
+        add_re(r"(?P<sign>[+-]){%d}(?P<year>[0-9]{%d})"
+               r"-W(?P<week>[0-9]{2})-(?P<day>[0-9]{1})"
+               % (sign, yeardigits))
         #    YYYYWwwD or +-YYYYYYWwwD ... basic week date
-        cache_entry.append(re.compile(r"(?P<sign>[+-]){%d}(?P<year>[0-9]{%d})W"
-                                      r"(?P<week>[0-9]{2})(?P<day>[0-9]{1})"
-                                      % (sign, yeardigits)))
+        add_re(r"(?P<sign>[+-]){%d}(?P<year>[0-9]{%d})W"
+               r"(?P<week>[0-9]{2})(?P<day>[0-9]{1})"
+               % (sign, yeardigits))
         # 3. ordinal dates:
         #    YYYY-DDD or +-YYYYYY-DDD ... extended format
         #    YYYYDDD or +-YYYYYYDDD ... basic format
-        cache_entry.append(re.compile(r"(?P<sign>[+-]){%d}(?P<year>[0-9]{%d})"
-                                      r"-?(?P<day>[0-9]{3})"
-                                      % (sign, yeardigits)))
+        add_re(r"(?P<sign>[+-]){%d}(?P<year>[0-9]{%d})"
+               r"-?(?P<day>[0-9]{3})"
+               % (sign, yeardigits))
         # 4. week dates:
         #    YYYY-Www or +-YYYYYY-Www ... extended reduced accuracy week date
         #    YYYYWww or +-YYYYYYWww ... basic reduced accuracy week date
-        cache_entry.append(re.compile(r"(?P<sign>[+-]){%d}(?P<year>[0-9]{%d})"
-                                      r"-?W(?P<week>[0-9]{2})"
-                                      % (sign, yeardigits)))
+        add_re(r"(?P<sign>[+-]){%d}(?P<year>[0-9]{%d})"
+               r"-?W(?P<week>[0-9]{2})"
+               % (sign, yeardigits))
         # 5. month dates:
         #    YYY-MM or +-YYYYYY-MM ... reduced accuracy specific month
-        cache_entry.append(re.compile(r"(?P<sign>[+-]){%d}(?P<year>[0-9]{%d})"
-                                      r"-(?P<month>[0-9]{2})"
-                                      % (sign, yeardigits)))
+        add_re(r"(?P<sign>[+-]){%d}(?P<year>[0-9]{%d})"
+               r"-(?P<month>[0-9]{2})"
+               % (sign, yeardigits))
         # 6. year dates:
         #    YYYY or +-YYYYYY ... reduced accuracy specific year
-        cache_entry.append(re.compile(r"(?P<sign>[+-]){%d}(?P<year>[0-9]{%d})"
-                                      % (sign, yeardigits)))
+        add_re(r"(?P<sign>[+-]){%d}(?P<year>[0-9]{%d})"
+               % (sign, yeardigits))
         # 7. century dates:
         #    YY or +-YYYY ... reduced accuracy specific century
-        cache_entry.append(re.compile(r"(?P<sign>[+-]){%d}"
-                                      r"(?P<century>[0-9]{%d})"
-                                      % (sign, yeardigits - 2)))
+        add_re(r"(?P<sign>[+-]){%d}"
+               r"(?P<century>[0-9]{%d})"
+               % (sign, yeardigits - 2))
 
         DATE_REGEX_CACHE[(yeardigits, expanded)] = cache_entry
     return DATE_REGEX_CACHE[(yeardigits, expanded)]