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fix #2837 - expose test function that determines whether an AST is a string literal

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2020-01-06 11:43:16 -08:00
parent ebc9b7fb4e
commit 2920ee56e9
1 changed files with 11 additions and 1 deletions
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12
src/api/c++/z3++.h
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@ -745,6 +745,7 @@ namespace z3 {
bool is_numeral(std::string& s) const { if (!is_numeral()) return false; s = Z3_get_numeral_string(ctx(), m_ast); check_error(); return true; } bool is_numeral(std::string& s) const { if (!is_numeral()) return false; s = Z3_get_numeral_string(ctx(), m_ast); check_error(); return true; }
bool is_numeral(std::string& s, unsigned precision) const { if (!is_numeral()) return false; s = Z3_get_numeral_decimal_string(ctx(), m_ast, precision); check_error(); return true; } bool is_numeral(std::string& s, unsigned precision) const { if (!is_numeral()) return false; s = Z3_get_numeral_decimal_string(ctx(), m_ast, precision); check_error(); return true; }
bool is_numeral(double& d) const { if (!is_numeral()) return false; d = Z3_get_numeral_double(ctx(), m_ast); check_error(); return true; } bool is_numeral(double& d) const { if (!is_numeral()) return false; d = Z3_get_numeral_double(ctx(), m_ast); check_error(); return true; }
/** /**
\brief Return true if this expression is an application. \brief Return true if this expression is an application.
*/ */
@ -895,18 +896,27 @@ namespace z3 {
return expr(ctx(),r); return expr(ctx(),r);
} }
/**
\brief Return true if this expression is a string literal.
The string can be accessed using \c get_string() and \c get_escaped_string()
*/
bool is_string_value() const { return Z3_is_string(ctx(), m_ast); }
/** /**
\brief for a string value expression return an escaped or unescaped string value. \brief for a string value expression return an escaped or unescaped string value.
\pre expression is for a string value. \pre expression is for a string value.
*/ */
std::string get_escaped_string() const { std::string get_escaped_string() const {
assert(is_string_value());
char const* s = Z3_get_string(ctx(), m_ast); char const* s = Z3_get_string(ctx(), m_ast);
check_error(); check_error();
return std::string(s); return std::string(s);
} }
std::string get_string() const { std::string get_string() const {
assert(is_string_value());
unsigned n; unsigned n;
char const* s = Z3_get_lstring(ctx(), m_ast, &n); char const* s = Z3_get_lstring(ctx(), m_ast, &n);
check_error(); check_error();