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add basic rewriting to strings

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2015-12-05 12:02:33 -08:00
parent c04f75cdbb
commit 75359c580e
10 changed files with 323 additions and 8 deletions
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5
src/ast/seq_decl_plugin.h
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@ -134,7 +134,7 @@ public:
virtual ~seq_decl_plugin() {}
virtual void finalize();
virtual decl_plugin * mk_fresh() { return alloc(seq_decl_plugin); }
virtual sort * mk_sort(decl_kind k, unsigned num_parameters, parameter const * parameters);
@ -159,6 +159,8 @@ class seq_util {
family_id m_fid;
public:
ast_manager& get_manager() const { return m; }
class str {
seq_util& u;
ast_manager& m;
@ -168,6 +170,7 @@ public:
app* mk_string(symbol const& s);
app* mk_string(char const* s) { return mk_string(symbol(s)); }
app* mk_string(std::string const& s) { return mk_string(symbol(s.c_str())); }
app* mk_concat(expr* a, expr* b) { expr* es[2] = { a, b }; return m.mk_app(m_fid, OP_STRING_CONCAT, 2, es); }
app* mk_length(expr* a) { return m.mk_app(m_fid, OP_STRING_LENGTH, 1, &a); }
app* mk_substr(expr* a, expr* b, expr* c) { expr* es[3] = { a, b, c }; return m.mk_app(m_fid, OP_STRING_SUBSTR, 3, es); }