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fix #2316

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2019-06-02 16:37:38 -07:00
parent 1d46d5c870
commit 6fdef691e5
2 changed files with 4 additions and 3 deletions
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6
src/ast/seq_decl_plugin.h
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@ -271,14 +271,14 @@ public:
app* mk_stoi(expr* s) const { return m.mk_app(m_fid, OP_STRING_STOI, 1, &s); }
app* mk_is_empty(expr* s) const;
bool is_string(expr const * n) const { return is_app_of(n, m_fid, OP_STRING_CONST); }
bool is_nth(func_decl* f) const { return is_decl_of(f, m_fid, OP_SEQ_NTH); }
bool is_string(expr const * n) const { return is_app_of(n, m_fid, OP_STRING_CONST); }
bool is_string(expr const* n, symbol& s) const {
return is_string(n) && (s = to_app(n)->get_decl()->get_parameter(0).get_symbol(), true);
}
bool is_string(expr const* n, zstring& s) const;
bool is_empty(expr const* n) const { symbol s;
return is_app_of(n, m_fid, OP_SEQ_EMPTY) || (is_string(n, s) && !s.is_numerical() && *s.bare_str() == 0);
}