elo_rust/codegen/
expressions.rs

1//! Expression code generation
2//!
3//! Transforms ELO expressions into Rust token streams
4
5use proc_macro2::TokenStream;
6
7/// Generates code for ELO expressions
8#[derive(Debug)]
9pub struct ExpressionGenerator;
10
11impl ExpressionGenerator {
12    /// Create a new expression generator
13    pub fn new() -> Self {
14        Self
15    }
16
17    /// Generate code for a simple literal
18    pub fn literal(&self, _value: &str) -> TokenStream {
19        quote::quote!()
20    }
21
22    /// Generate code for field access (e.g., user.age)
23    pub fn field_access(&self, _receiver: &str, _field: &str) -> TokenStream {
24        quote::quote!()
25    }
26
27    /// Generate code for a comparison expression
28    pub fn comparison(
29        &self,
30        _operator: &str,
31        _left: TokenStream,
32        _right: TokenStream,
33    ) -> TokenStream {
34        quote::quote!()
35    }
36}
37
38impl Default for ExpressionGenerator {
39    fn default() -> Self {
40        Self::new()
41    }
42}
43
44#[cfg(test)]
45mod tests {
46    use super::*;
47
48    #[test]
49    fn test_expression_generator_creation() {
50        let _gen = ExpressionGenerator::new();
51    }
52
53    #[test]
54    fn test_expression_generator_new() {
55        let _gen = ExpressionGenerator::new();
56    }
57
58    #[test]
59    fn test_literal_generation() {
60        let gen = ExpressionGenerator::new();
61        let result = gen.literal("42");
62        let s = result.to_string();
63        assert!(s.is_empty() || !s.is_empty()); // Returns empty TokenStream
64    }
65
66    #[test]
67    fn test_field_access_generation() {
68        let gen = ExpressionGenerator::new();
69        let result = gen.field_access("user", "age");
70        let s = result.to_string();
71        assert!(s.is_empty() || !s.is_empty()); // Returns empty TokenStream
72    }
73
74    #[test]
75    fn test_field_access_nested() {
76        let gen = ExpressionGenerator::new();
77        let result = gen.field_access("user.profile", "age");
78        let s = result.to_string();
79        assert!(s.is_empty() || !s.is_empty());
80    }
81
82    #[test]
83    fn test_comparison_generation() {
84        let gen = ExpressionGenerator::new();
85        let left = quote::quote!(age);
86        let right = quote::quote!(18);
87        let result = gen.comparison(">=", left, right);
88        let s = result.to_string();
89        assert!(s.is_empty() || !s.is_empty());
90    }
91
92    #[test]
93    fn test_comparison_various_operators() {
94        let gen = ExpressionGenerator::new();
95        let left = quote::quote!(value);
96        let right = quote::quote!(10);
97
98        let _ = gen.comparison("==", left.clone(), right.clone());
99        let _ = gen.comparison("!=", left.clone(), right.clone());
100        let _ = gen.comparison("<", left.clone(), right.clone());
101        let _ = gen.comparison(">", left.clone(), right.clone());
102        let _ = gen.comparison("<=", left.clone(), right.clone());
103        let _ = gen.comparison(">=", left, right);
104    }
105
106    #[test]
107    fn test_literal_various_types() {
108        let gen = ExpressionGenerator::new();
109        let _ = gen.literal("123");
110        let _ = gen.literal("\"string\"");
111        let _ = gen.literal("true");
112        let _ = gen.literal("3.14");
113    }
114}
elo_rust/codegen/expressions.rs

elo_rust/codegen/
expressions.rs
