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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);
}

1
src/smt/theory_seq.h
View file

@ -397,6 +397,7 @@ namespace smt {
void add_theory_assumptions(expr_ref_vector & assumptions) override;
theory* mk_fresh(context* new_ctx) override { return alloc(theory_seq, new_ctx->get_manager(), m_params); }
char const * get_name() const override { return "seq"; }
bool include_func_interp(func_decl* f) override { return m_util.str.is_nth(f); }
theory_var mk_var(enode* n) override;
void apply_sort_cnstr(enode* n, sort* s) override;
void display(std::ostream & out) const override;