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Add creating reals from any numeral and getting f64 from reals #287

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Add creating reals from any numeral and getting f64 from reals #287

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9daa93a
feat: creating reals from numeral strings
lucascool12 Mar 28, 2024
7d2698a
feat: Real ast as f64
lucascool12 Mar 28, 2024
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15 changes: 13 additions & 2 deletions z3/src/ast.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -583,10 +583,17 @@ impl<'ctx> Real<'ctx> {
}

pub fn from_real_str(ctx: &'ctx Context, num: &str, den: &str) -> Option<Real<'ctx>> {
let fraction_string = format!("{num:} / {den:}");
Self::from_str(ctx, &fraction_string)
}

/// The string may be of the form \[num\]*\[.\[num\]*\]\[E\[+|-\]\[num\]...+\].
/// Or a rational, that is, a string of the form \[num\]* / \[num\]*
pub fn from_str(ctx: &'ctx Context, numeral: &str) -> Option<Real<'ctx>> {
let sort = Sort::real(ctx);
let ast = unsafe {
let fraction_cstring = CString::new(format!("{num:} / {den:}")).unwrap();
let numeral_ptr = Z3_mk_numeral(ctx.z3_ctx, fraction_cstring.as_ptr(), sort.z3_sort);
let c_numeral = CString::new(numeral).unwrap();
let numeral_ptr = Z3_mk_numeral(ctx.z3_ctx, c_numeral.as_ptr(), sort.z3_sort);
if numeral_ptr.is_null() {
return None;
}
Expand Down Expand Up @@ -930,6 +937,10 @@ impl<'ctx> Real<'ctx> {
}
}

pub fn as_f64(&self) -> f64 {
unsafe { Z3_get_numeral_double(self.ctx.z3_ctx, self.z3_ast) }
}

pub fn from_int(ast: &Int<'ctx>) -> Real<'ctx> {
unsafe { Self::wrap(ast.ctx, Z3_mk_int2real(ast.ctx.z3_ctx, ast.z3_ast)) }
}
Expand Down
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