Z3 C API中Z3_mk_config与Z3_mk_context已弃用，求替代函数

Great question! Those old Z3_mk_config() and Z3_mk_context(Z3_config) functions were indeed deprecated in newer Z3 versions (starting around 4.8.x), and the replacement uses a more streamlined parameter system. Here's exactly what you should use instead:

Basic Context Creation (No Parameters) #

If you don't need to set any configuration parameters, you can create a context in one simple step with:

Z3_context ctx = Z3_mk_context_u32(0);

The 0 here is a placeholder for legacy flags (which are no longer used), so you can safely pass this value.

Context Creation with Custom Parameters #

If you need to set parameters (like enabling model generation, which was your original use case), use the Z3_context_params API instead of the old Z3_config:

Z3_context_params params;
Z3_context ctx;

// Create a parameter object to hold your settings
params = Z3_context_params_create();

// Enable model generation (equivalent to your old "model=true" setting)
Z3_context_params_set_bool(params, "model", Z3_TRUE);

// Optional: Set other parameters if needed (example: set a timeout in milliseconds)
// Z3_context_params_set_uint(params, "timeout", 5000);

// Create the context with your configured parameters
ctx = Z3_mk_context(params);

// Clean up the parameter object (it's no longer needed after context creation)
Z3_context_params_destroy(params);

Key Notes: #

• All the parameters you could set with the old Z3_config are still supported via Z3_context_params—use the appropriate setter function for each parameter type:
  • Boolean values: Z3_context_params_set_bool
  • Numeric values: Z3_context_params_set_uint (for unsigned integers) or Z3_context_params_set_int
  • String values: Z3_context_params_set_string
• Don't forget to clean up resources when you're done: call Z3_del_context(ctx) to destroy the context, just like you did with the deprecated API.

内容的提问来源于stack exchange，提问作者German Vidal