rebel-parse: add support for different path roots

Distinguish relative (unprefixed), absolute (`::` prefix) and
section-specific (`recipe::`, `task::`) paths.

4 files changed, 23 insertions, 1 deletions

diff --git a/crates/rebel-parse/src/ast/mod.rs b/crates/rebel-parse/src/ast/mod.rs
index 4fa8e63..eb6a7bd 100644
--- a/crates/rebel-parse/src/ast/mod.rs
+++ b/crates/rebel-parse/src/ast/mod.rs
@@ -131,8 +131,17 @@ pub struct FuncParam<'a> {
 	pub typ: Type<'a>,
 }
 
+#[derive(Debug, Clone, Copy, PartialEq, Eq)]
+pub enum PathRoot {
+	Absolute,
+	Relative,
+	Recipe,
+	Task,
+}
+
 #[derive(Debug, Clone, PartialEq, Eq)]
 pub struct Path<'a> {
+	pub root: PathRoot,
 	pub components: Vec<Ident<'a>>,
 }
 
diff --git a/crates/rebel-parse/src/grammar/recipe.rs b/crates/rebel-parse/src/grammar/recipe.rs
index b1ac32f..50a0694 100644
--- a/crates/rebel-parse/src/grammar/recipe.rs
+++ b/crates/rebel-parse/src/grammar/recipe.rs
@@ -164,7 +164,18 @@ peg::parser! {
 			}
 
 		rule path() -> ast::Path<'a>
-			= components:ident() ++ p2(':', ':') { ast::Path { components } }
+			= components:(ident() ++ p2(':', ':')) {
+				ast::Path { root: ast::PathRoot::Relative, components }
+			}
+			/ components:(p2(':', ':') ident:ident() { ident })+ {
+				ast::Path { root: ast::PathRoot::Absolute, components }
+			}
+			/ [Token::Keyword(Keyword::Recipe)] components:(p2(':', ':') ident:ident() { ident })* {
+				ast::Path { root: ast::PathRoot::Recipe, components }
+			}
+			/ [Token::Keyword(Keyword::Task)] components:(p2(':', ':') ident:ident() { ident })* {
+				ast::Path { root: ast::PathRoot::Task, components }
+			}
 
 		rule field() -> ast::Ident<'a>
 			= ident()
diff --git a/crates/rebel-parse/src/grammar/tokenize.rs b/crates/rebel-parse/src/grammar/tokenize.rs
index 8696a89..70df2c3 100644
--- a/crates/rebel-parse/src/grammar/tokenize.rs
+++ b/crates/rebel-parse/src/grammar/tokenize.rs
@@ -8,6 +8,7 @@ static KEYWORDS: phf::Map<&'static str, Keyword> = phf::phf_map! {
 	"let" => Keyword::Let,
 	"map" => Keyword::Map,
 	"mut" => Keyword::Mut,
+	"recipe" => Keyword::Recipe,
 	"set" =>  Keyword::Set,
 	"struct" => Keyword::Struct,
 	"task" => Keyword::Task,
diff --git a/crates/rebel-parse/src/token.rs b/crates/rebel-parse/src/token.rs
index cbdd932..2f86dbd 100644
--- a/crates/rebel-parse/src/token.rs
+++ b/crates/rebel-parse/src/token.rs
@@ -14,6 +14,7 @@ pub enum Keyword {
 	Let,
 	Map,
 	Mut,
+	Recipe,
 	Set,
 	Struct,
 	Task,