Add missing API methods: dimacs, translate, proof, addSimplifier, getLower/getUpper, etc.

Co-authored-by: NikolajBjorner <3085284+NikolajBjorner@users.noreply.github.com>

src/api/go/simplifier.go

@@ -0,0 +1,54 @@
+package z3
+
+/*
+#include "z3.h"
+#include <stdlib.h>
+*/
+import "C"
+import (
+	"runtime"
+	"unsafe"
+)
+
+// Simplifier represents a Z3 simplifier for pre-processing solver assertions.
+type Simplifier struct {
+	ctx *Context
+	ptr C.Z3_simplifier
+}
+
+// newSimplifier creates a new Simplifier and manages its reference count.
+func newSimplifier(ctx *Context, ptr C.Z3_simplifier) *Simplifier {
+	s := &Simplifier{ctx: ctx, ptr: ptr}
+	C.Z3_simplifier_inc_ref(ctx.ptr, ptr)
+	runtime.SetFinalizer(s, func(simp *Simplifier) {
+		C.Z3_simplifier_dec_ref(simp.ctx.ptr, simp.ptr)
+	})
+	return s
+}
+
+// MkSimplifier creates a simplifier with the given name.
+func (c *Context) MkSimplifier(name string) *Simplifier {
+	cName := C.CString(name)
+	defer C.free(unsafe.Pointer(cName))
+	return newSimplifier(c, C.Z3_mk_simplifier(c.ptr, cName))
+}
+
+// AndThen creates a simplifier that applies s followed by s2.
+func (s *Simplifier) AndThen(s2 *Simplifier) *Simplifier {
+	return newSimplifier(s.ctx, C.Z3_simplifier_and_then(s.ctx.ptr, s.ptr, s2.ptr))
+}
+
+// UsingParams creates a simplifier that uses the given parameters.
+func (s *Simplifier) UsingParams(params *Params) *Simplifier {
+	return newSimplifier(s.ctx, C.Z3_simplifier_using_params(s.ctx.ptr, s.ptr, params.ptr))
+}
+
+// GetHelp returns help information for the simplifier.
+func (s *Simplifier) GetHelp() string {
+	return C.GoString(C.Z3_simplifier_get_help(s.ctx.ptr, s.ptr))
+}
+
+// GetParamDescrs returns parameter descriptions for the simplifier.
+func (s *Simplifier) GetParamDescrs() *ParamDescrs {
+	return newParamDescrs(s.ctx, C.Z3_simplifier_get_param_descrs(s.ctx.ptr, s.ptr))
+}