aethershell 0.3.1

The world's first multi-agent shell with typed functional pipelines and multi-modal AI
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181

// tests/zero_param_lambda.rs
//! Tests for zero-parameter lambda support

use aethershell::env::Env;
use aethershell::eval::eval_program;
use aethershell::parser::parse_program;
use aethershell::value::Value;

fn run(code: &str) -> Value {
    let stmts = parse_program(code).expect("parse failed");
    let mut env = Env::new();
    eval_program(&stmts, &mut env).expect(&format!("eval failed for: {}", code))
}

// ============================================================================
// Basic zero-parameter lambda tests
// ============================================================================

#[test]
fn test_zero_param_simple() {
    let result = run("f = fn() => 42; f()");
    assert_eq!(result, Value::Int(42));
}

#[test]
fn test_zero_param_string() {
    let result = run(r#"f = fn() => "hello"; f()"#);
    assert_eq!(result, Value::Str("hello".to_string()));
}

#[test]
fn test_zero_param_array() {
    let result = run("f = fn() => [1,2,3]; f()");
    match result {
        Value::Array(arr) => {
            assert_eq!(arr.len(), 3);
            assert_eq!(arr[0], Value::Int(1));
        }
        _ => panic!("Expected Array"),
    }
}

#[test]
fn test_zero_param_record() {
    let result = run("f = fn() => { a: 1, b: 2 }; f()");
    match result {
        Value::Record(rec) => {
            assert_eq!(rec.get("a"), Some(&Value::Int(1)));
            assert_eq!(rec.get("b"), Some(&Value::Int(2)));
        }
        _ => panic!("Expected Record"),
    }
}

// ============================================================================
// Closure tests (capturing environment)
// ============================================================================

#[test]
fn test_zero_param_closure_capture() {
    let result = run("x = 10; f = fn() => x; f()");
    assert_eq!(result, Value::Int(10));
}

#[test]
fn test_zero_param_closure_capture_expression() {
    let result = run("x = 5; y = 3; f = fn() => x + y; f()");
    assert_eq!(result, Value::Int(8));
}

#[test]
fn test_zero_param_multiple_closures() {
    let result = run(r#"
        a = fn() => 1;
        b = fn() => 2;
        c = fn() => 3;
        a() + b() + c()
    "#);
    assert_eq!(result, Value::Int(6));
}

// ============================================================================
// Thunk pattern (deferred evaluation)
// ============================================================================

#[test]
fn test_zero_param_thunk_pattern() {
    let result = run(r#"
        expensive = fn() => 100 * 100;
        expensive()
    "#);
    assert_eq!(result, Value::Int(10000));
}

#[test]
fn test_zero_param_factory_pattern() {
    let result = run(r#"
        make_counter = fn() => 0;
        c1 = make_counter();
        c2 = make_counter();
        c1 + c2
    "#);
    assert_eq!(result, Value::Int(0));
}

// ============================================================================
// With expressions in body
// ============================================================================

#[test]
fn test_zero_param_with_pipeline() {
    let result = run(r#"
        get_data = fn() => [1,2,3] | map(fn(x) => x * 2);
        get_data() | sum
    "#);
    assert_eq!(result, Value::Int(12));
}

#[test]
fn test_zero_param_with_match() {
    let result = run(r#"
        toggle = fn() => match true { true => "on", _ => "off" };
        toggle()
    "#);
    assert_eq!(result, Value::Str("on".to_string()));
}

// ============================================================================
// Composition with other features
// ============================================================================

#[test]
fn test_zero_param_in_array() {
    let result = run(r#"
        fns = [fn() => 1, fn() => 2, fn() => 3];
        fns | map(fn(f) => f()) | sum
    "#);
    assert_eq!(result, Value::Int(6));
}

#[test]
fn test_zero_param_immediate_call() {
    // IIFE - Immediately Invoked Function Expression
    let result = run("(fn() => 42)()");
    assert_eq!(result, Value::Int(42));
}

#[test]
fn test_zero_param_as_value() {
    let result = run(r#"
        get_fn = fn() => fn() => "inner";
        inner = get_fn();
        inner()
    "#);
    assert_eq!(result, Value::Str("inner".to_string()));
}

// ============================================================================
// Edge cases
// ============================================================================

#[test]
fn test_zero_param_called_multiple_times() {
    let result = run(r#"
        f = fn() => 1;
        f() + f() + f()
    "#);
    assert_eq!(result, Value::Int(3));
}

#[test]
fn test_zero_param_with_null() {
    let result = run("f = fn() => null; f()");
    assert_eq!(result, Value::Null);
}

#[test]
fn test_zero_param_with_bool() {
    let result = run("f = fn() => true; f()");
    assert_eq!(result, Value::Bool(true));
}