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-rw-r--r--rprt-engine/src/explainer.rs28
-rw-r--r--rprt-engine/src/expression.rs16
-rw-r--r--rprt-engine/src/parser.rs162
3 files changed, 203 insertions, 3 deletions
diff --git a/rprt-engine/src/explainer.rs b/rprt-engine/src/explainer.rs
index 38bd41b..b62bee4 100644
--- a/rprt-engine/src/explainer.rs
+++ b/rprt-engine/src/explainer.rs
@@ -201,9 +201,9 @@ fn build_tree_from_expr(
g_pos
}
Composite::Hook { kind, left, right } => {
- let left_offset = offset + 1; // Account for opening '('
+ let left_offset = offset + 1;
let left_pos = build_tree_from_expr(left, depth + 1, left_offset, nodes);
- let right_offset = left_offset + format_width(left) + 1; // +1 for hook operator (< or >)
+ let right_offset = left_offset + format_width(left) + 1;
let right_pos = build_tree_from_expr(right, depth + 1, right_offset, nodes);
nodes.push(TreeNode {
@@ -216,6 +216,30 @@ fn build_tree_from_expr(
});
left_pos
}
+ Composite::Group { operations } => {
+ let mut children = Vec::new();
+ let mut current_offset = offset + 1;
+
+ for (i, op) in operations.iter().enumerate() {
+ if i > 0 {
+ current_offset += 3;
+ }
+ let pos = build_tree_from_expr(op, depth + 1, current_offset, nodes);
+ children.push(pos);
+ current_offset += format_width(op);
+ }
+
+ let node_pos = children.first().copied().unwrap_or(offset);
+ nodes.push(TreeNode {
+ pos: node_pos,
+ depth,
+ children,
+ is_leaf: false,
+ hook_kind: None,
+ train_arity: None,
+ });
+ node_pos
+ }
}
}
diff --git a/rprt-engine/src/expression.rs b/rprt-engine/src/expression.rs
index ba433cf..fcb1ff1 100644
--- a/rprt-engine/src/expression.rs
+++ b/rprt-engine/src/expression.rs
@@ -29,6 +29,10 @@ pub enum Composite {
g: Box<Composite>,
h: Box<Composite>,
},
+
+ Group {
+ operations: Vec<Composite>,
+ },
}
impl Display for Composite {
@@ -54,6 +58,16 @@ impl Display for Composite {
Hook { kind, left, right } => write!(fmtr, "({left}{kind}{right})"),
Train2 { f, g } => write!(fmtr, "({f} {g})"),
Train3 { f, g, h } => write!(fmtr, "({f} {g} {h})"),
+ Group { operations } => {
+ write!(fmtr, "{{")?;
+ for (i, op) in operations.iter().enumerate() {
+ if i > 0 {
+ write!(fmtr, " , ")?;
+ }
+ write!(fmtr, "{}", op)?;
+ }
+ write!(fmtr, "}}")
+ }
}
}
}
@@ -212,6 +226,6 @@ mod tests {
let formatted = format!("{}", comp);
println!("Formatted: {}", formatted);
- assert_eq!(formatted, "(~'x/re/ (c 5) e>d)");
+ assert_eq!(formatted, "(~'x/re/ (c 5) (e>d))");
}
}
diff --git a/rprt-engine/src/parser.rs b/rprt-engine/src/parser.rs
index c17913a..9536046 100644
--- a/rprt-engine/src/parser.rs
+++ b/rprt-engine/src/parser.rs
@@ -120,6 +120,7 @@ fn can_start_composition(context: &ParseContext, offset: usize) -> bool {
| Some(Token::Complement)
| Some(Token::Conditional)
| Some(Token::LParen)
+ | Some(Token::LBrace)
| Some(Token::Dot)
| Some(Token::Change)
| Some(Token::Insert)
@@ -144,6 +145,21 @@ fn parse_base_function(context: &mut ParseContext) -> Result<Composite, ParseErr
}
context.advance(1, false)?;
Ok(func)
+ } else if matches!(context.current()?, Token::LBrace) {
+ context.advance(1, true)?;
+ let mut operations = vec![parse_composition(context)?];
+ while matches!(context.current(), Ok(Token::Comma)) {
+ context.advance(1, true)?;
+ operations.push(parse_composition(context)?);
+ }
+ if !matches!(context.current()?, Token::RBrace) {
+ return Err(ParseError::UnexpectedToken {
+ found: context.current()?,
+ expecting: "}",
+ });
+ }
+ context.advance(1, false)?;
+ Ok(Composite::Group { operations })
} else if is_function_t(context)? {
parse_builtin_function_t(context)
} else if is_function_s(context)? {
@@ -874,4 +890,150 @@ mod tests {
_ => panic!(),
}
}
+
+ #[test]
+ fn test_parse_group() {
+ let input = r#"{e, #5 -, "tr"}"#;
+ let tokens = tokenise(input).unwrap();
+ let result = parse(tokens).unwrap();
+ match result {
+ Composite::Group { operations } => {
+ assert_eq!(operations.len(), 3);
+ match &operations[0] {
+ Composite::SelectionFunction {
+ func: BuiltinSelectionFn::Empty,
+ search_mod: None,
+ result_transform: None,
+ } => {}
+ _ => panic!(),
+ }
+ match &operations[1] {
+ Composite::Train2 { f, g } => {
+ match &**f {
+ Composite::SelectionFunction {
+ func: BuiltinSelectionFn::CharOffset(5),
+ search_mod: None,
+ result_transform: None,
+ } => {}
+ _ => panic!(),
+ }
+ match &**g {
+ Composite::SelectionFunction {
+ func: BuiltinSelectionFn::Span,
+ search_mod: None,
+ result_transform: None,
+ } => {}
+ _ => panic!(),
+ }
+ }
+ _ => panic!(),
+ }
+ match &operations[2] {
+ Composite::TextFunction {
+ func: BuiltinTextFn::Literal(s),
+ swapped: false,
+ } => {
+ assert_eq!(s, "tr");
+ }
+ _ => panic!(),
+ }
+ }
+ _ => panic!(),
+ }
+ }
+
+ #[test]
+ fn test_parse_nested_groups_in_train() {
+ let input = r#"{e<#5, ;$ i} (~e<d) $"#;
+ let tokens = tokenise(input).unwrap();
+ let result = parse(tokens).unwrap();
+ match result {
+ Composite::Train3 { f, g, h } => {
+ match f.as_ref() {
+ Composite::Group { operations } => {
+ assert_eq!(operations.len(), 2);
+ match &operations[0] {
+ Composite::Hook {
+ kind: HookKind::After,
+ left,
+ right,
+ } => {
+ match left.as_ref() {
+ Composite::SelectionFunction {
+ func: BuiltinSelectionFn::Empty,
+ search_mod: None,
+ result_transform: None,
+ } => {}
+ _ => panic!(),
+ }
+ match right.as_ref() {
+ Composite::SelectionFunction {
+ func: BuiltinSelectionFn::CharOffset(5),
+ search_mod: None,
+ result_transform: None,
+ } => {}
+ _ => panic!(),
+ }
+ }
+ _ => panic!(),
+ }
+ match &operations[1] {
+ Composite::Train2 { f: f2, g: g2 } => {
+ match f2.as_ref() {
+ Composite::SelectionFunction {
+ func: BuiltinSelectionFn::EndOfBuffer,
+ search_mod: Some(SearchModifier::Sequential),
+ result_transform: None,
+ } => {}
+ _ => panic!(),
+ }
+ match g2.as_ref() {
+ Composite::TextFunction {
+ func: BuiltinTextFn::Insert,
+ swapped: false,
+ } => {}
+ _ => panic!(),
+ }
+ }
+ _ => panic!(),
+ }
+ }
+ _ => panic!(),
+ }
+ match g.as_ref() {
+ Composite::Hook {
+ kind: HookKind::After,
+ left,
+ right,
+ } => {
+ match left.as_ref() {
+ Composite::SelectionFunction {
+ func: BuiltinSelectionFn::Empty,
+ search_mod: None,
+ result_transform: Some(ResultTransform::Complement),
+ } => {}
+ _ => panic!(),
+ }
+ match right.as_ref() {
+ Composite::TextFunction {
+ func: BuiltinTextFn::Delete,
+ swapped: false,
+ } => {}
+ _ => panic!(),
+ }
+ }
+ _ => panic!(),
+ }
+ match h.as_ref() {
+ Composite::SelectionFunction {
+ func: BuiltinSelectionFn::EndOfBuffer,
+ search_mod: None,
+ result_transform: None,
+ } => {}
+ _ => panic!(),
+ }
+ }
+ _ => panic!(),
+ }
+ }
}
generated by cgit v1.2.3 (git 2.46.0) at 2026-08-28 22:20:39 +0000