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-rw-r--r--mteval/ns.cc2
-rw-r--r--mteval/scorer.cc2
2 files changed, 2 insertions, 2 deletions
diff --git a/mteval/ns.cc b/mteval/ns.cc
index b64d4798..c1ea238b 100644
--- a/mteval/ns.cc
+++ b/mteval/ns.cc
@@ -106,7 +106,7 @@ struct BleuSegmentEvaluator : public SegmentEvaluator {
}
struct NGramCompare {
- int operator() (const vector<WordID>& a, const vector<WordID>& b) {
+ int operator() (const vector<WordID>& a, const vector<WordID>& b) const {
const size_t as = a.size();
const size_t bs = b.size();
const size_t s = (as < bs ? as : bs);
diff --git a/mteval/scorer.cc b/mteval/scorer.cc
index 9eb9a76e..fedbca91 100644
--- a/mteval/scorer.cc
+++ b/mteval/scorer.cc
@@ -198,7 +198,7 @@ class BLEUScorerBase : public SentenceScorer {
virtual float ComputeRefLength(const vector<WordID>& hyp) const = 0;
private:
struct NGramCompare {
- int operator() (const vector<WordID>& a, const vector<WordID>& b) {
+ int operator() (const vector<WordID>& a, const vector<WordID>& b) const {
size_t as = a.size();
size_t bs = b.size();
const size_t s = (as < bs ? as : bs);