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overhaul stoi and itos to fix #1957 and related

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2018-11-23 18:50:20 -08:00
parent 801026937d
commit 88fb826a03
3 changed files with 106 additions and 97 deletions
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2
src/smt/theory_seq.h
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@ -552,6 +552,8 @@ namespace smt {
void add_stoi_axiom(expr* n);
bool add_stoi_val_axiom(expr* n);
bool add_itos_val_axiom(expr* n);
void add_si_axiom(expr* s, expr* i, unsigned sz);
void ensure_digit_axiom();
literal is_digit(expr* ch);
expr_ref digit2int(expr* ch);
void add_itos_length_axiom(expr* n);