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update generation of empty sequence to take sort argument, fix mk_concat substitution

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
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Nikolaj Bjorner 2026-03-13 10:00:23 -07:00
parent e384e8f3d4
commit df9df50a71
6 changed files with 146 additions and 121 deletions
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src/ast/euf/euf_sgraph.h
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@ -128,7 +128,7 @@ namespace euf {
// factory methods for creating snodes with corresponding expressions
snode* mk_var(symbol const& name);
snode* mk_char(unsigned ch);
snode* mk_empty();
snode *mk_empty_seq(sort *s);
snode* mk_concat(snode* a, snode* b);
// drop operations: remove tokens from the front/back of a concat tree