# Program
Status: 🟢
Assertions: 2
```rustleaf
var z = 0;
fn add(x, y) {
z += 1;
x + y;
}
assert(is_unit(add(2, 3)));
assert(z == 1);
```
# Output
```
parse_program: starting
parse_program: parsing statement at position 0 (Var)
parse_statement: starting at position 0 (Var)
consume_token: position 0 consumed Var
consume_token: position 1 consumed Ident
consume_token: position 2 consumed Equal
parse_expression: starting at position 3 (Int(0))
consume_token: position 3 consumed Int
parse_primary: success - parsed numeric/string literal
parse_expression: success - parsed precedence expression
consume_token: position 4 consumed Semicolon
parse_statement: success - parsed var declaration
parse_program: parsing statement at position 5 (Fn)
parse_statement: starting at position 5 (Fn)
consume_token: position 5 consumed Fn
consume_token: position 6 consumed Ident
consume_token: position 7 consumed LeftParen
consume_token: position 8 consumed Ident
consume_token: position 9 consumed Comma
consume_token: position 10 consumed Ident
consume_token: position 11 consumed RightParen
consume_token: position 12 consumed LeftBrace
parse_statement: starting at position 13 (Ident(z))
consume_token: position 13 consumed Ident
consume_token: position 14 consumed PlusEqual
parse_expression: starting at position 15 (Int(1))
consume_token: position 15 consumed Int
parse_primary: success - parsed numeric/string literal
parse_expression: success - parsed precedence expression
consume_token: position 16 consumed Semicolon
parse_statement: success - parsed assignment
parse_statement: starting at position 17 (Ident(x))
consume_token: position 17 consumed Ident
parse_statement: falling back to expression statement
parse_expression: starting at position 17 (Ident(x))
consume_token: position 17 consumed Ident
parse_primary: success - parsed identifier (x)
consume_token: position 18 consumed Plus
consume_token: position 19 consumed Ident
parse_primary: success - parsed identifier (y)
parse_expression: success - parsed precedence expression
consume_token: position 20 consumed Semicolon
consume_token: position 21 consumed RightBrace
parse_statement: success - parsed function declaration
parse_program: parsing statement at position 22 (Ident(assert))
parse_statement: starting at position 22 (Ident(assert))
consume_token: position 22 consumed Ident
parse_statement: falling back to expression statement
parse_expression: starting at position 22 (Ident(assert))
consume_token: position 22 consumed Ident
parse_primary: success - parsed identifier (assert)
consume_token: position 23 consumed LeftParen
parse_expression: starting at position 24 (Ident(is_unit))
consume_token: position 24 consumed Ident
parse_primary: success - parsed identifier (is_unit)
consume_token: position 25 consumed LeftParen
parse_expression: starting at position 26 (Ident(add))
consume_token: position 26 consumed Ident
parse_primary: success - parsed identifier (add)
consume_token: position 27 consumed LeftParen
parse_expression: starting at position 28 (Int(2))
consume_token: position 28 consumed Int
parse_primary: success - parsed numeric/string literal
parse_expression: success - parsed precedence expression
consume_token: position 29 consumed Comma
parse_expression: starting at position 30 (Int(3))
consume_token: position 30 consumed Int
parse_primary: success - parsed numeric/string literal
parse_expression: success - parsed precedence expression
consume_token: position 31 consumed RightParen
parse_expression: success - parsed precedence expression
consume_token: position 32 consumed RightParen
parse_expression: success - parsed precedence expression
consume_token: position 33 consumed RightParen
parse_expression: success - parsed precedence expression
consume_token: position 34 consumed Semicolon
parse_program: parsing statement at position 35 (Ident(assert))
parse_statement: starting at position 35 (Ident(assert))
consume_token: position 35 consumed Ident
parse_statement: falling back to expression statement
parse_expression: starting at position 35 (Ident(assert))
consume_token: position 35 consumed Ident
parse_primary: success - parsed identifier (assert)
consume_token: position 36 consumed LeftParen
parse_expression: starting at position 37 (Ident(z))
consume_token: position 37 consumed Ident
parse_primary: success - parsed identifier (z)
consume_token: position 38 consumed EqualEqual
consume_token: position 39 consumed Int
parse_primary: success - parsed numeric/string literal
parse_expression: success - parsed precedence expression
consume_token: position 40 consumed RightParen
parse_expression: success - parsed precedence expression
consume_token: position 41 consumed Semicolon
parse_program: parsed 4 statements
```
# Result
```rust
Ok(
Unit,
)
```
# Lex
```rust
Ok(
[
0: Token(Var),
1: Token(Ident, "z"),
2: Token(Equal),
3: Token(Int, "0"),
4: Token(Semicolon),
5: Token(Fn),
6: Token(Ident, "add"),
7: Token(LeftParen),
8: Token(Ident, "x"),
9: Token(Comma),
10: Token(Ident, "y"),
11: Token(RightParen),
12: Token(LeftBrace),
13: Token(Ident, "z"),
14: Token(PlusEqual),
15: Token(Int, "1"),
16: Token(Semicolon),
17: Token(Ident, "x"),
18: Token(Plus),
19: Token(Ident, "y"),
20: Token(Semicolon),
21: Token(RightBrace),
22: Token(Ident, "assert"),
23: Token(LeftParen),
24: Token(Ident, "is_unit"),
25: Token(LeftParen),
26: Token(Ident, "add"),
27: Token(LeftParen),
28: Token(Int, "2"),
29: Token(Comma),
30: Token(Int, "3"),
31: Token(RightParen),
32: Token(RightParen),
33: Token(RightParen),
34: Token(Semicolon),
35: Token(Ident, "assert"),
36: Token(LeftParen),
37: Token(Ident, "z"),
38: Token(EqualEqual),
39: Token(Int, "1"),
40: Token(RightParen),
41: Token(Semicolon),
42: Token(Eof)
],
)
```
# Parse
```rust
Ok(
Program(
[
VarDecl {
pattern: Variable(
"z",
),
value: Some(
Literal(
Int(
0,
),
),
),
},
FnDecl {
name: "add",
params: [
Parameter {
name: "x",
default: None,
kind: Regular,
},
Parameter {
name: "y",
default: None,
kind: Regular,
},
],
body: Block {
statements: [
Assignment {
target: Identifier(
"z",
),
op: AddAssign,
value: Literal(
Int(
1,
),
),
},
Expression(
Add(
Identifier(
"x",
),
Identifier(
"y",
),
),
),
],
final_expr: None,
},
is_pub: false,
},
Expression(
FunctionCall(
Identifier(
"assert",
),
[
FunctionCall(
Identifier(
"is_unit",
),
[
FunctionCall(
Identifier(
"add",
),
[
Literal(
Int(
2,
),
),
Literal(
Int(
3,
),
),
],
),
],
),
],
),
),
Expression(
FunctionCall(
Identifier(
"assert",
),
[
Eq(
Identifier(
"z",
),
Literal(
Int(
1,
),
),
),
],
),
),
],
),
)
```
# Eval
```rust
Ok(
RustValue(<unknown>),
)
```