diff options
| author | Andres Noetzli <andres.noetzli@gmail.com> | 2019-01-29 10:17:06 -0800 |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2019-01-29 10:17:06 -0800 |
| commit | 1eaf6cf987fa1452528dc0598ca7235be735ba3b (patch) | |
| tree | c327198308289e343aabf576ff3e3a05637aa166 /test/unit | |
| parent | 467ef8692009f440bda74083d476131ff1e88b51 (diff) | |
Strings: Remove redundant replace rewrite (#2822)
Pulling the first constant string from a replace if there is no overlap
with the search term is subsumed by the rewrite using
`stripConstantEndpoints()`.
Diffstat (limited to 'test/unit')
| -rw-r--r-- | test/unit/theory/theory_strings_rewriter_white.h | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/test/unit/theory/theory_strings_rewriter_white.h b/test/unit/theory/theory_strings_rewriter_white.h index 59d36d9e8..5f08ce741 100644 --- a/test/unit/theory/theory_strings_rewriter_white.h +++ b/test/unit/theory/theory_strings_rewriter_white.h @@ -495,6 +495,7 @@ class TheoryStringsRewriterWhite : public CxxTest::TestSuite Node empty = d_nm->mkConst(::CVC4::String("")); Node a = d_nm->mkConst(::CVC4::String("A")); + Node ab = d_nm->mkConst(::CVC4::String("AB")); Node b = d_nm->mkConst(::CVC4::String("B")); Node c = d_nm->mkConst(::CVC4::String("C")); Node d = d_nm->mkConst(::CVC4::String("D")); @@ -625,6 +626,19 @@ class TheoryStringsRewriterWhite : public CxxTest::TestSuite b); repl = d_nm->mkNode(kind::STRING_STRREPL, b, x, b); differentNormalForms(repl_repl, repl); + + { + // Same normal form: + // + // (str.replace (str.++ "AB" x) "C" y) + // + // (str.++ "AB" (str.replace x "C" y)) + Node lhs = d_nm->mkNode( + kind::STRING_STRREPL, d_nm->mkNode(kind::STRING_CONCAT, ab, x), c, y); + Node rhs = d_nm->mkNode( + kind::STRING_CONCAT, ab, d_nm->mkNode(kind::STRING_STRREPL, x, c, y)); + sameNormalForm(lhs, rhs); + } } void testRewriteContains() |