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authorVincent Ambo <mail@tazj.in>2022-10-13T12·23+0300
committertazjin <tazjin@tvl.su>2022-10-16T12·26+0000
commit0abc66ad91b8bcc25aeb7f3d086fcc52529ec8e8 (patch)
tree5c8a224b7ad033bfa6e4e2c9391248f391e0d3ac /tvix/eval/src/lib.rs
parentd9c497520ca0b89f49aed7c9507504b55eff49ce (diff)
feat(tvix/eval): add an AST pretty-printing module r/5143
This implements serde::Serialize for the rnix AST through a wrapper
type, and exposes a function for serialising the AST into
a (pretty-printed JSON) string representation.

This can be used to debug issues with the AST, and to display an AST
reprsentation in tools like tvixbolt.

Serialize is implemented manually because we don't own any of the
structs and the way to traverse them is not easily derived
automatically, and this is quite verbose. We might be able to condense
it a little bit, but at the same time it's also fairly straightforward.

Change-Id: I922df43cfc25636f3c8baee7944c75ade516055c
Reviewed-on: https://cl.tvl.fyi/c/depot/+/6943
Autosubmit: tazjin <tazjin@tvl.su>
Tested-by: BuildkiteCI
Reviewed-by: Adam Joseph <adam@westernsemico.com>
Reviewed-by: tazjin <tazjin@tvl.su>
Diffstat (limited to 'tvix/eval/src/lib.rs')
-rw-r--r--tvix/eval/src/lib.rs2
1 files changed, 2 insertions, 0 deletions
diff --git a/tvix/eval/src/lib.rs b/tvix/eval/src/lib.rs
index a7505eaf3acc..04b5a3290b8d 100644
--- a/tvix/eval/src/lib.rs
+++ b/tvix/eval/src/lib.rs
@@ -5,6 +5,7 @@ mod errors;
 mod eval;
 pub mod observer;
 mod opcode;
+mod pretty_ast;
 mod source;
 mod spans;
 mod upvalues;
@@ -25,6 +26,7 @@ pub use crate::builtins::global_builtins;
 pub use crate::compiler::compile;
 pub use crate::errors::EvalResult;
 pub use crate::eval::{interpret, Options};
+pub use crate::pretty_ast::pretty_print_expr;
 pub use crate::source::SourceCode;
 pub use crate::value::Value;
 pub use crate::vm::run_lambda;