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fix: add Char pattern matching and Char comparison operators

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- Parser: support Char literals in match patterns (e.g., 'x' => ...)
- Interpreter: add Char comparison for <, <=, >, >= operators
  Previously only Int, Float, and String supported ordering comparisons.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
This commit is contained in:
Brandon Lucas
2026-02-17 08:25:15 -05:00
parent d26fd975d1
commit e3b6f4322a
2 changed files with 12 additions and 0 deletions
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4
src/interpreter.rs
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@@ -1610,6 +1610,7 @@ impl Interpreter {
(Value::Int(a), Value::Int(b)) => Ok(Value::Bool(a < b)),
(Value::Float(a), Value::Float(b)) => Ok(Value::Bool(a < b)),
(Value::String(a), Value::String(b)) => Ok(Value::Bool(a < b)),
(Value::Char(a), Value::Char(b)) => Ok(Value::Bool(a < b)),
(l, r) => Err(RuntimeError {
message: format!("Cannot compare {} and {}", l.type_name(), r.type_name()),
span: Some(span),
@@ -1619,6 +1620,7 @@ impl Interpreter {
(Value::Int(a), Value::Int(b)) => Ok(Value::Bool(a <= b)),
(Value::Float(a), Value::Float(b)) => Ok(Value::Bool(a <= b)),
(Value::String(a), Value::String(b)) => Ok(Value::Bool(a <= b)),
(Value::Char(a), Value::Char(b)) => Ok(Value::Bool(a <= b)),
(l, r) => Err(RuntimeError {
message: format!("Cannot compare {} and {}", l.type_name(), r.type_name()),
span: Some(span),
@@ -1628,6 +1630,7 @@ impl Interpreter {
(Value::Int(a), Value::Int(b)) => Ok(Value::Bool(a > b)),
(Value::Float(a), Value::Float(b)) => Ok(Value::Bool(a > b)),
(Value::String(a), Value::String(b)) => Ok(Value::Bool(a > b)),
(Value::Char(a), Value::Char(b)) => Ok(Value::Bool(a > b)),
(l, r) => Err(RuntimeError {
message: format!("Cannot compare {} and {}", l.type_name(), r.type_name()),
span: Some(span),
@@ -1637,6 +1640,7 @@ impl Interpreter {
(Value::Int(a), Value::Int(b)) => Ok(Value::Bool(a >= b)),
(Value::Float(a), Value::Float(b)) => Ok(Value::Bool(a >= b)),
(Value::String(a), Value::String(b)) => Ok(Value::Bool(a >= b)),
(Value::Char(a), Value::Char(b)) => Ok(Value::Bool(a >= b)),
(l, r) => Err(RuntimeError {
message: format!("Cannot compare {} and {}", l.type_name(), r.type_name()),
span: Some(span),