# Program
Status: 🟢
Assertions: 3
```rustleaf
var greeting = "hello";
var empty = "";
assert(greeting == "hello");
assert(empty == "");
assert(greeting + " world" == "hello world");
```
# 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 (String(hello))
consume_token: position 3 consumed String
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 (Var)
parse_statement: starting at position 5 (Var)
consume_token: position 5 consumed Var
consume_token: position 6 consumed Ident
consume_token: position 7 consumed Equal
parse_expression: starting at position 8 (String())
consume_token: position 8 consumed String
parse_primary: success - parsed numeric/string literal
parse_expression: success - parsed precedence expression
consume_token: position 9 consumed Semicolon
parse_statement: success - parsed var declaration
parse_program: parsing statement at position 10 (Ident(assert))
parse_statement: starting at position 10 (Ident(assert))
consume_token: position 10 consumed Ident
parse_statement: falling back to expression statement
parse_expression: starting at position 10 (Ident(assert))
consume_token: position 10 consumed Ident
parse_primary: success - parsed identifier (assert)
consume_token: position 11 consumed LeftParen
parse_expression: starting at position 12 (Ident(greeting))
consume_token: position 12 consumed Ident
parse_primary: success - parsed identifier (greeting)
consume_token: position 13 consumed EqualEqual
consume_token: position 14 consumed String
parse_primary: success - parsed numeric/string literal
parse_expression: success - parsed precedence expression
consume_token: position 15 consumed RightParen
parse_expression: success - parsed precedence expression
consume_token: position 16 consumed Semicolon
parse_program: parsing statement at position 17 (Ident(assert))
parse_statement: starting at position 17 (Ident(assert))
consume_token: position 17 consumed Ident
parse_statement: falling back to expression statement
parse_expression: starting at position 17 (Ident(assert))
consume_token: position 17 consumed Ident
parse_primary: success - parsed identifier (assert)
consume_token: position 18 consumed LeftParen
parse_expression: starting at position 19 (Ident(empty))
consume_token: position 19 consumed Ident
parse_primary: success - parsed identifier (empty)
consume_token: position 20 consumed EqualEqual
consume_token: position 21 consumed String
parse_primary: success - parsed numeric/string literal
parse_expression: success - parsed precedence expression
consume_token: position 22 consumed RightParen
parse_expression: success - parsed precedence expression
consume_token: position 23 consumed Semicolon
parse_program: parsing statement at position 24 (Ident(assert))
parse_statement: starting at position 24 (Ident(assert))
consume_token: position 24 consumed Ident
parse_statement: falling back to expression statement
parse_expression: starting at position 24 (Ident(assert))
consume_token: position 24 consumed Ident
parse_primary: success - parsed identifier (assert)
consume_token: position 25 consumed LeftParen
parse_expression: starting at position 26 (Ident(greeting))
consume_token: position 26 consumed Ident
parse_primary: success - parsed identifier (greeting)
consume_token: position 27 consumed Plus
consume_token: position 28 consumed String
parse_primary: success - parsed numeric/string literal
consume_token: position 29 consumed EqualEqual
consume_token: position 30 consumed String
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 Semicolon
parse_program: parsed 5 statements
```
# Result
```rust
Ok(
Unit,
)
```
# Lex
```rust
Ok(
[
0: Token(Var),
1: Token(Ident, "greeting"),
2: Token(Equal),
3: Token(String, "hello"),
4: Token(Semicolon),
5: Token(Var),
6: Token(Ident, "empty"),
7: Token(Equal),
8: Token(String, ""),
9: Token(Semicolon),
10: Token(Ident, "assert"),
11: Token(LeftParen),
12: Token(Ident, "greeting"),
13: Token(EqualEqual),
14: Token(String, "hello"),
15: Token(RightParen),
16: Token(Semicolon),
17: Token(Ident, "assert"),
18: Token(LeftParen),
19: Token(Ident, "empty"),
20: Token(EqualEqual),
21: Token(String, ""),
22: Token(RightParen),
23: Token(Semicolon),
24: Token(Ident, "assert"),
25: Token(LeftParen),
26: Token(Ident, "greeting"),
27: Token(Plus),
28: Token(String, " world"),
29: Token(EqualEqual),
30: Token(String, "hello world"),
31: Token(RightParen),
32: Token(Semicolon),
33: Token(Eof)
],
)
```
# Parse
```rust
Ok(
Program(
[
VarDecl {
pattern: Variable(
"greeting",
),
value: Some(
Literal(
String(
"hello",
),
),
),
},
VarDecl {
pattern: Variable(
"empty",
),
value: Some(
Literal(
String(
"",
),
),
),
},
Expression(
FunctionCall(
Identifier(
"assert",
),
[
Eq(
Identifier(
"greeting",
),
Literal(
String(
"hello",
),
),
),
],
),
),
Expression(
FunctionCall(
Identifier(
"assert",
),
[
Eq(
Identifier(
"empty",
),
Literal(
String(
"",
),
),
),
],
),
),
Expression(
FunctionCall(
Identifier(
"assert",
),
[
Eq(
Add(
Identifier(
"greeting",
),
Literal(
String(
" world",
),
),
),
Literal(
String(
"hello world",
),
),
),
],
),
),
],
),
)
```
# Eval
```rust
Ok(
RustValue(<unknown>),
)
```