diff options
Diffstat (limited to 'tvix/eval/src/compiler/bindings.rs')
| -rw-r--r-- | tvix/eval/src/compiler/bindings.rs | 41 |
1 files changed, 29 insertions, 12 deletions
diff --git a/tvix/eval/src/compiler/bindings.rs b/tvix/eval/src/compiler/bindings.rs index 659dce299a1a..4f384484a973 100644 --- a/tvix/eval/src/compiler/bindings.rs +++ b/tvix/eval/src/compiler/bindings.rs @@ -53,19 +53,23 @@ impl BindingsKind { /// AST-traversing functions related to bindings. impl Compiler<'_> { - fn compile_inherits<N>( + /// Compile all inherits of a node with entries that do *not* have a + /// namespace to inherit from, and return the remaining ones that do. + fn compile_plain_inherits<N>( &mut self, slot: LocalIdx, - count: &mut usize, - bindings: &mut Vec<TrackedBinding>, kind: BindingsKind, + count: &mut usize, node: &N, - ) where + ) -> Vec<(ast::Expr, String, Span)> + where N: ToSpan + ast::HasEntry, { - // First pass over all inherits resolves only those without - // namespaces. Since they always resolve to a higher scope, we - // can just compile and declare them immediately. + // Pass over all inherits, resolving only those without namespaces. + // Since they always resolve in a higher scope, we can just compile and + // declare them immediately. + // + // Inherits with namespaces are returned to the caller. let mut inherit_froms: Vec<(ast::Expr, String, Span)> = vec![]; for inherit in node.inherits() { @@ -145,9 +149,21 @@ impl Compiler<'_> { } } - // Second pass over the inherits that have a namespace, to declare them - // in the tracked bindings. Compiling the values into their slots is the - // job of the caller. + inherit_froms + } + + /// Declare all namespaced inherits, that is inherits which are inheriting + /// values from an attribute set. + /// + /// This only ensures that the locals stack is aware of the inherits, it + /// does not yet emit bytecode that places them on the stack. This is up to + /// the owner of the `bindings` vector, which this function will populate. + fn declare_namespaced_inherits( + &mut self, + kind: BindingsKind, + inherit_froms: Vec<(ast::Expr, String, Span)>, + bindings: &mut Vec<TrackedBinding>, + ) { for (from, name, span) in inherit_froms { let key_slot = if kind.is_attrs() { // In an attribute set, the keys themselves are placed @@ -425,10 +441,11 @@ impl Compiler<'_> { let mut count = 0; self.scope_mut().begin_scope(); - // Vector to track these observed bindings. + // Vector to track all observed bindings. let mut bindings: Vec<TrackedBinding> = vec![]; - self.compile_inherits(slot, &mut count, &mut bindings, kind, node); + let inherit_froms = self.compile_plain_inherits(slot, kind, &mut count, node); + self.declare_namespaced_inherits(kind, inherit_froms, &mut bindings); // Declare all regular bindings for entry in node.attrpath_values() { |