### High-Level API: Context Type Narrowing Example

Source: https://www.npmjs.com/package/z3-solver/index_activetab=readme

Illustrates TypeScript's type narrowing feature to prevent mixing Z3 objects from different contexts. Attempting to mix them will result in a compile-time error.

```typescript
const { init } = require('z3-solver');
const { Context } = await init();
const { Int: Int1 } = new Context('context1');
const { Int: Int2 } = new Context('context2');

const x = Int1.const('x');
const y = Int2.const('y');

// The below will fail to compile in Typescript
x.ge(y);
```

--------------------------------

### TypeScript Context Type Safety Example (TypeScript)

Source: https://www.npmjs.com/package/z3-solver/index_activetab=code

Illustrates TypeScript's compile-time error checking for mixing Z3 contexts. Variables and functions associated with one context will not compile if used with another, preventing type-related errors at runtime.

```typescript
const { Int: Int1 } = new Context('context1');
const { Int: Int2 } = new Context('context2');

const x = Int1.const('x');
const y = Int2.const('y');

// The below will fail to compile in Typescript
x.ge(y);
```

--------------------------------

### Initialize Z3 Bindings (Node.js/Browser)

Source: https://www.npmjs.com/package/z3-solver/index_activetab=readme

Initializes the z3-solver package to access both low-level C-like API (Z3) and high-level Z3Py-like API (Context). This is the first step to using the library.

```javascript
const { init } = require('z3-solver');
const { Z3, Context } = await init();
```

--------------------------------

### High-Level API: Basic Solver Usage

Source: https://www.npmjs.com/package/z3-solver/index_activetab=readme

Demonstrates how to use the high-level API to create a solver, define an integer variable, add constraints, and check for satisfiability. Requires initializing a Context first.

```javascript
const { init } = require('z3-solver');
const { Context } = await init();
const { Solver, Int, And } = new Context('main');

const x = Int.const('x');

const solver = new Solver();
solver.add(And(x.ge(0), x.le(9)));
console.log(await solver.check());
// sat
```

--------------------------------

### Initialize Z3 Solver Bindings (JavaScript)

Source: https://www.npmjs.com/package/z3-solver/index_activetab=dependents

Initializes the z3-solver package to access both low-level C-like and high-level Z3Py-like APIs. This is an asynchronous operation and returns an object containing Z3 bindings.

```javascript
const { init } = require('z3-solver');
const { 
  Z3, // Low-level C-like API
  Context, // High-level Z3Py-like API
} = await init();
```

--------------------------------

### Low-Level Z3 API Initialization (JavaScript)

Source: https://www.npmjs.com/package/z3-solver/index_activetab=code

Initializes the low-level Z3 bindings, returning the Emscripten module (`em`) and the Z3 bindings object. The `em` object provides access to Emscripten's runtime, useful for tasks like thread management.

```javascript
const { init } = require('z3-solver');
const { em, Z3 } = await init();
```

--------------------------------

### Initialize Z3 Solver for Browser (JavaScript)

Source: https://www.npmjs.com/package/z3-solver/index_activetab=code

Manually imports the initialization function specifically for browser environments. This is necessary when not using a bundler or when explicit control over the environment is needed. It returns an object containing Z3 and Context.

```javascript
const { init } = require('z3-solver/browser');
const { Z3, Context } = await init();
```

--------------------------------

### Initialize Z3 Solver for Node.js (JavaScript)

Source: https://www.npmjs.com/package/z3-solver/index_activetab=code

Manually imports the initialization function specifically for Node.js environments. This can be useful if your bundler does not automatically select the correct version. It returns an object containing Z3 and Context.

```javascript
const { init } = require('z3-solver/node');
const { Z3, Context } = await init();
```

--------------------------------

### TypeScript: Handling C Out Parameters in z3-solver

Source: https://www.npmjs.com/package/z3-solver/index_activetab=dependents

Demonstrates how C functions with 'out parameters' for returning multiple values are mapped to TypeScript records in the z3-solver bindings. It shows the conversion from C's pointer-based output to a structured object return type.

```typescript
function rcf_get_numerator_denominator(c: Z3_context, a: Z3_rcf_num): { n: Z3_rcf_num; d: Z3_rcf_num } {
  // ... implementation details ...
}
```

--------------------------------

### C to TS: Handling Multiple Return Values (Out Parameters)

Source: https://www.npmjs.com/package/z3-solver/index_activetab=readme

Demonstrates the translation of C functions with out parameters to TypeScript, where multiple return values are grouped into a record. This approach simplifies handling functions that return multiple values in JavaScript/TypeScript.

```C
void Z3_rcf_get_numerator_denominator(Z3_context c, Z3_rcf_num a, Z3_rcf_num * n, Z3_rcf_num * d);
```

```TypeScript
function rcf_get_numerator_denominator(c: Z3_context, a: Z3_rcf_num): { n: Z3_rcf_num; d: Z3_rcf_num } {
  // ...
}
```

--------------------------------

### C to TS: Handling Out Parameters in z3-solver

Source: https://www.npmjs.com/package/z3-solver/index_activetab=dependencies

Demonstrates how C functions with out parameters are represented in the TypeScript bindings of z3-solver. It shows the translation of C's address-based multi-value return to JS records, and how single out parameters with non-interesting return values are simplified.

```c
void Z3_rcf_get_numerator_denominator(Z3_context c, Z3_rcf_num a, Z3_rcf_num * n, Z3_rcf_num * d);
```

```typescript
function rcf_get_numerator_denominator(c: Z3_context, a: Z3_rcf_num): { n: Z3_rcf_num; d: Z3_rcf_num } {
  // ...
}
```

```c
bool Z3_model_eval(Z3_context c, Z3_model m, Z3_ast t, bool model_completion, Z3_ast * v);
```

```typescript
function model_eval(c: Z3_context, m: Z3_model, t: Z3_ast, model_completion: boolean): Z3_ast | null {
  // ...
}
```

--------------------------------

### Handle C Out Parameters in TypeScript Bindings

Source: https://www.npmjs.com/package/z3-solver/index

Demonstrates how C functions with out parameters are translated into TypeScript functions that return records. This includes handling single and multiple out parameters, and how boolean return values are mapped to nullable types.

```typescript
function rcf_get_numerator_denominator(c: Z3_context, a: Z3_rcf_num): { n: Z3_rcf_num; d: Z3_rcf_num } {
  // ...
}

function model_eval(c: Z3_context, m: Z3_model, t: Z3_ast, model_completion: boolean): Z3_ast | null {
  // ...
}
```

--------------------------------

### C to TS: Handling Nullable Pointers

Source: https://www.npmjs.com/package/z3-solver/index_activetab=readme

Shows how C APIs that accept or return null pointers (often indicated by `_opt` suffix) are represented in TypeScript bindings. These are translated to nullable types (e.g., `Type | null`) in TypeScript, providing a more idiomatic way to handle optional values.

```C
Z3_ast_opt Z3_model_get_const_interp(Z3_context c, Z3_model m, Z3_func_decl a);
```

```TypeScript
function model_get_const_interp(c: Z3_context, m: Z3_model, a: Z3_func_decl): Z3_ast | null {
  // ...
}
```

--------------------------------

### Async Functions in z3-solver TypeScript Bindings

Source: https://www.npmjs.com/package/z3-solver/index_activetab=dependencies

Details the use of `async` functions in z3-solver's TypeScript bindings for long-running operations to prevent blocking the main thread. It lists the specific Z3 APIs that are marked as async and notes their single-threaded execution.

```typescript
// Example of an async function usage (conceptual):
async function checkSatisfiability(solver) {
  const result = await solver.check();
  console.log(result);
}
```

--------------------------------

### High-Level API: Templated Function for Type Propagation

Source: https://www.npmjs.com/package/z3-solver/index_activetab=readme

Shows how to use templated functions to correctly propagate narrowed types when working with Z3 objects from specific contexts, ensuring type safety.

```typescript
function add<Name extends string>(a: Arith<Name>, b: Arith<Name>): Arith<Name> {
  return a.add(b).add(5);
}
```

--------------------------------

### Represent C Null Pointers in TypeScript

Source: https://www.npmjs.com/package/z3-solver/index_activetab=code

Illustrates how C APIs that accept or return null pointers (indicated by '_opt' suffix) are represented in TypeScript using the `| null` union type.

```typescript
function model_get_const_interp(c: Z3_context, m: Z3_model, a: Z3_func_decl): Z3_ast | null {
  // ... implementation details ...
}
```

--------------------------------

### Handle C Out Parameters in TypeScript

Source: https://www.npmjs.com/package/z3-solver/index_activetab=code

Demonstrates how C functions with out parameters are mapped to TypeScript, returning objects containing the out parameters. If a function has a single out parameter and no significant return value, it's directly mapped. The boolean return value from C is mapped to a nullable return type in TypeScript.

```typescript
function rcf_get_numerator_denominator(c: Z3_context, a: Z3_rcf_num): { n: Z3_rcf_num; d: Z3_rcf_num } {
  // ... implementation details ...
}
```

```typescript
function model_eval(c: Z3_context, m: Z3_model, t: Z3_ast, model_completion: boolean): Z3_ast | null {
  // ... implementation details ...
}
```

--------------------------------

### C to TS: Handling Array Arguments and Return Values

Source: https://www.npmjs.com/package/z3-solver/index_activetab=readme

Explains the conversion of C functions that accept arrays. In C, array length must be passed separately, but in TypeScript, this is inferred. The function signature in TS reflects this by directly accepting an array and returning inferred array lengths or results.

```C
unsigned Z3_rcf_mk_roots(Z3_context c, unsigned n, Z3_rcf_num const a[], Z3_rcf_num roots[]);
```

```TypeScript
function rcf_mk_roots(c: Z3_context, a: Z3_rcf_num[]): { rv: number; roots: Z3_rcf_num[] } {
  // ...
}
```

--------------------------------

### Templated Function for Type Propagation

Source: https://www.npmjs.com/package/z3-solver/index_activetab=versions

Shows how to use templated functions in TypeScript to propagate narrowed types across function calls, ensuring type safety when working with Z3 objects from specific contexts.

```typescript
// Use templated functions to propagate narrowed types
function add<Name extends string>(a: Arith<Name>, b: Arith<Name>): Arith<Name> {
  return a.add(b).add(5);
}
```

--------------------------------

### C to TS: Handling Single Out Parameter and Ignoring Return Value

Source: https://www.npmjs.com/package/z3-solver/index_activetab=readme

Illustrates how C functions with a single out parameter and a return value (like boolean for success) are mapped to TypeScript. The boolean return is often translated to a nullable return type in TS, and the out parameter becomes the primary return value.

```C
bool Z3_model_eval(Z3_context c, Z3_model m, Z3_ast t, bool model_completion, Z3_ast * v);
```

```TypeScript
function model_eval(c: Z3_context, m: Z3_model, t: Z3_ast, model_completion: boolean): Z3_ast | null {
  // ...
}
```

--------------------------------

### TypeScript: Mapping C Boolean Return with Out Parameter in z3-solver

Source: https://www.npmjs.com/package/z3-solver/index_activetab=dependents

Illustrates the mapping of a C function that returns a boolean success status and has a single 'out parameter' to a TypeScript function. The C boolean return is converted to a nullable return type in TypeScript, indicating success or failure.

```typescript
function model_eval(c: Z3_context, m: Z3_model, t: Z3_ast, model_completion: boolean): Z3_ast | null {
  // ... implementation details ...
}
```

--------------------------------

### Manage C Arrays in TypeScript Bindings

Source: https://www.npmjs.com/package/z3-solver/index_activetab=code

Explains how C APIs accepting arrays and their lengths are handled in TypeScript. The length parameter is inferred, and arrays are passed directly. When multiple arrays are expected to be of the same length in C, the TypeScript bindings enforce this constraint.

```typescript
function rcf_mk_roots(c: Z3_context, a: Z3_rcf_num[]): { rv: number; roots: Z3_rcf_num[] } {
  // ... implementation details ...
}
```

--------------------------------

### Handle C Null Pointers in TypeScript Bindings

Source: https://www.npmjs.com/package/z3-solver/index

Illustrates how C types ending in '_opt', which represent nullable pointers, are mapped to TypeScript's union types with 'null'. This allows for explicit handling of potential null return values or parameters.

```typescript
function model_get_const_interp(c: Z3_context, m: Z3_model, a: Z3_func_decl): Z3_ast | null {
  // ...
}
```

--------------------------------

### Implement Async Functions for Long-Running Z3 Operations

Source: https://www.npmjs.com/package/z3-solver/index_activetab=code

Details specific Z3 APIs that are marked as `async` in the TypeScript bindings to prevent blocking the main thread. These operations are executed on a separate thread and are not thread-safe, meaning only one call can be active at a time.

```typescript
// Example of an async function declaration (actual implementation not shown)
async function Z3_simplify(c: Z3_context, t: Z3_ast): Promise<Z3_ast> {
  // ... performs a long-running simplification operation ...
}
```

```typescript
// Example of an async function declaration (actual implementation not shown)
async function Z3_solver_check(c: Z3_context, s: Z3_solver): Promise<Z3_lbool> {
  // ... performs a long-running check operation ...
}
```

--------------------------------

### Handle C Arrays in TypeScript Bindings

Source: https://www.npmjs.com/package/z3-solver/index

Explains how C functions accepting arrays, which require explicit length parameters, are represented in TypeScript. The bindings automatically infer array lengths and enforce consistency for multiple arrays of the same expected length.

```typescript
function rcf_mk_roots(c: Z3_context, a: Z3_rcf_num[]): { rv: number; roots: Z3_rcf_num[] } {
  // ...
}
```

--------------------------------

### Async Functions for Long-Running Z3 Operations

Source: https://www.npmjs.com/package/z3-solver/index

Identifies Z3 APIs that are marked as 'async' in the TypeScript bindings. These functions are automatically executed on a separate thread to prevent main thread blocking and are not thread-safe, allowing only one call at a time.

```typescript
// Examples of async functions:
// Z3_simplify
// Z3_solver_check
// Z3_tactic_apply
// Z3_optimize_check
// Z3_algebraic_roots
// Z3_fixedpoint_query
```

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