devalang 0.2.0

Write music with code. Devalang is a domain-specific language (DSL) for sound designers and music hackers. Compose, automate, and control sound — in plain text.
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
182
183
184
185

use super::*;

#[test]
fn test_register_and_get_handler() {
    let mut registry = EventRegistry::new();

    let handler = EventHandler {
        event_name: "test".to_string(),
        body: vec![],
        once: false,
        args: None,
    };

    registry.register_handler(handler);

    let handlers = registry.get_handlers("test");
    assert_eq!(handlers.len(), 1);
    assert_eq!(handlers[0].event_name, "test");
}

#[test]
fn test_emit_and_get_events() {
    let mut registry = EventRegistry::new();

    let mut data = HashMap::new();
    data.insert("value".to_string(), Value::Number(42.0));

    registry.emit("test".to_string(), data, 0.0);

    let events = registry.get_events_by_name("test");
    assert_eq!(events.len(), 1);
    assert_eq!(events[0].event_name, "test");
}

#[test]
fn test_pattern_matches() {
    assert!(pattern_matches("*", "anything"));
    assert!(pattern_matches("test", "test"));
    assert!(!pattern_matches("test", "other"));
    assert!(pattern_matches("test*", "test123"));
    assert!(pattern_matches("*test", "mytest"));
    assert!(pattern_matches("te?t", "test"));
    assert!(!pattern_matches("te?t", "teast"));
}

#[test]
fn test_once_handler() {
    let mut registry = EventRegistry::new();

    // First execution should return true
    assert!(registry.should_execute_once("test", 0));

    // Second execution should return false
    assert!(!registry.should_execute_once("test", 0));
}

#[test]
fn test_wildcard_handlers() {
    let mut registry = EventRegistry::new();

    registry.register_handler(EventHandler {
        event_name: "note.on".to_string(),
        body: vec![],
        once: false,
        args: None,
    });

    registry.register_handler(EventHandler {
        event_name: "note.off".to_string(),
        body: vec![],
        once: false,
        args: None,
    });

    let handlers = registry.get_handlers_matching("note.*");
    assert_eq!(handlers.len(), 2);
}

#[test]
fn test_clear_events() {
    let mut registry = EventRegistry::new();

    registry.emit("test".to_string(), HashMap::new(), 0.0);
    assert_eq!(registry.get_emitted_events().len(), 1);

    registry.clear_events();
    assert_eq!(registry.get_emitted_events().len(), 0);
}

#[test]
fn test_on_beat_interval_executes_every_n() {
    use crate::engine::audio::interpreter::driver::AudioInterpreter;
    use crate::language::syntax::ast::{Statement, StatementKind, Value};

    let mut interp = AudioInterpreter::new(44100);

    // Handler body emits 'fired'
    let emit_stmt = Statement {
        kind: StatementKind::Emit {
            event: "fired".to_string(),
            payload: None,
        },
        value: Value::Null,
        indent: 0,
        line: 0,
        column: 0,
    };

    let handler = EventHandler {
        event_name: "beat".to_string(),
        body: vec![emit_stmt],
        once: false,
        args: Some(vec![Value::Number(2.0)]),
    };

    interp.event_registry.register_handler(handler);

    // At beat 0 -> should execute
    interp.special_vars.current_beat = 0.0;
    interp.event_registry.clear_events();
    interp.suppress_beat_emit = true;
    let _ = crate::engine::audio::interpreter::driver::handler::execute_event_handlers(
        &mut interp,
        "beat",
    );
    assert_eq!(interp.event_registry.get_emitted_events().len(), 1);

    // At beat 1 -> should not execute
    interp.event_registry.clear_events();
    interp.special_vars.current_beat = 1.0;
    interp.suppress_beat_emit = true;
    let _ = crate::engine::audio::interpreter::driver::handler::execute_event_handlers(
        &mut interp,
        "beat",
    );
    assert_eq!(interp.event_registry.get_emitted_events().len(), 0);
}

#[test]
fn test_on_bar_interval_executes_every_n() {
    use crate::engine::audio::interpreter::driver::AudioInterpreter;
    use crate::language::syntax::ast::{Statement, StatementKind, Value};

    let mut interp = AudioInterpreter::new(44100);

    let emit_stmt = Statement {
        kind: StatementKind::Emit {
            event: "barred".to_string(),
            payload: None,
        },
        value: Value::Null,
        indent: 0,
        line: 0,
        column: 0,
    };

    let handler = EventHandler {
        event_name: "bar".to_string(),
        body: vec![emit_stmt],
        once: false,
        args: Some(vec![Value::Number(2.0)]),
    };

    interp.event_registry.register_handler(handler);

    // bar 0 -> executes
    interp.special_vars.current_bar = 0.0;
    interp.event_registry.clear_events();
    interp.suppress_beat_emit = true;
    let _ = crate::engine::audio::interpreter::driver::handler::execute_event_handlers(
        &mut interp,
        "bar",
    );
    assert_eq!(interp.event_registry.get_emitted_events().len(), 1);

    // bar 1 -> does not execute
    interp.event_registry.clear_events();
    interp.special_vars.current_bar = 1.0;
    interp.suppress_beat_emit = true;
    let _ = crate::engine::audio::interpreter::driver::handler::execute_event_handlers(
        &mut interp,
        "bar",
    );
    assert_eq!(interp.event_registry.get_emitted_events().len(), 0);
}