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author | Som Snytt <som.snytt@gmail.com> | 2012-04-22 02:58:26 -0700 |
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committer | Som Snytt <som.snytt@gmail.com> | 2012-04-26 11:44:39 -0700 |
commit | 9d925a30c73ee5856c83d3caab124f7dbeaa85a8 (patch) | |
tree | d7a14c7d0466435523452ed2cc88fe3d82c9e9b6 /test/files/pos | |
parent | 3c9c18ddccc17c2b0e62195315ba2abb72d3b761 (diff) | |
download | scala-9d925a30c73ee5856c83d3caab124f7dbeaa85a8.tar.gz scala-9d925a30c73ee5856c83d3caab124f7dbeaa85a8.tar.bz2 scala-9d925a30c73ee5856c83d3caab124f7dbeaa85a8.zip |
SI-5702 Pattern parser halts on star
In patterns, the parser halts when it sees stars.
This means it does not handle infix notation for a case class
named "*". This patch uses lookahead to decide whether to parse
'_' '*' as a sequence pattern or as the start of infix.
(For both normal and error cases, the tokens are always consumed
immediately.) Error messages are improved for _* (as a help to learners)
and slightly improved recovery helps the parse continue.
The entry point for XML patterns is now distinct; otherwise,
the change is local to pattern3-simplepattern; the entry point
for simplepattern() is unchanged because it is commented
"hook for IDE."
Diffstat (limited to 'test/files/pos')
-rw-r--r-- | test/files/pos/t5702-pos-infix-star.scala | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/test/files/pos/t5702-pos-infix-star.scala b/test/files/pos/t5702-pos-infix-star.scala new file mode 100644 index 0000000000..756bcdd8de --- /dev/null +++ b/test/files/pos/t5702-pos-infix-star.scala @@ -0,0 +1,15 @@ + +object Test { + case class *(a: Int, b: Int) + type Star = * + case class P(a: Int, b: Star) // alias still required + + def main(args: Array[String]) { + val v = new *(6,7) + val x * y = v + printf("%d,%d\n",x,y) + val p = P(5, v) + val P(a, b * c) = p + printf("%d,%d,%d\n",a,b,c) + } +} |