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Diffstat (limited to 'tvix/eval/src/compiler.rs')
| -rw-r--r-- | tvix/eval/src/compiler.rs | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/tvix/eval/src/compiler.rs b/tvix/eval/src/compiler.rs index 3df0ea4c9810..e38b06b456c5 100644 --- a/tvix/eval/src/compiler.rs +++ b/tvix/eval/src/compiler.rs @@ -1,5 +1,17 @@ //! This module implements a compiler for compiling the rnix AST //! representation to Tvix bytecode. +//! +//! A note on `unwrap()`: This module contains a lot of calls to +//! `unwrap()` or `expect(...)` on data structures returned by `rnix`. +//! The reason for this is that rnix uses the same data structures to +//! represent broken and correct ASTs, so all typed AST variants have +//! the ability to represent an incorrect node. +//! +//! However, at the time that the AST is passed to the compiler we +//! have verified that `rnix` considers the code to be correct, so all +//! variants are filed. In cases where the invariant is guaranteed by +//! the code in this module, `debug_assert!` has been used to catch +//! mistakes early during development. use crate::chunk::Chunk; use crate::errors::EvalResult; |