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Frontend AST for Podlang (#432)

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* Basic frontend AST and semantic validation

* Intro statement support

* Simplify validator lifetime

* Fix arity validation

* Lowering and splitting

* Remove legacy processor and use frontend AST by default

* Use builders instead of creating middleware types directly

* Typos/formatting

* Improve error messages when overflowing a batch due to splitting

* Add FromStr implementation for NativePredicate

* Remove 'raw' fields, and switch HashHex representation to byte vector rather than string

* Simpler wrapper types for batch and intro predicate hashes

* Parse secret and public keys to their respective data structures earlier

* More detail around string escape validity

* Simplify native predicate arity handling and move  method to NativePredicate impl

* Store hashes using middleware::Hash, and simplify lowering by using pre-parsed values

* Simplify predicate building

* Formatting

* Better error messages/suggestions for cases where predicate splitting fails

* Formatting

* Clippy fix

* Return error if we get a too-large int
This commit is contained in:
Rob Knight 2025-11-13 10:23:21 +01:00 • committed by GitHub
parent c382bf487c
commit 42f979c408
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11 changed files with 4250 additions and 1431 deletions
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src/lang/grammar.pest
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@ -33,8 +33,9 @@ use_predicate_list = { import_name ~ ("," ~ import_name)* }
import_name = { identifier | "_" }
batch_ref = { hash_hex }
use_intro_statement = { "use" ~ "intro" ~ identifier ~ "(" ~ use_intro_arg_list? ~ ")" ~ "from" ~ batch_ref }
use_intro_statement = { "use" ~ "intro" ~ identifier ~ "(" ~ use_intro_arg_list? ~ ")" ~ "from" ~ intro_predicate_ref }
use_intro_arg_list = { identifier ~ ("," ~ identifier)* }
intro_predicate_ref = { hash_hex }
request_def = { "REQUEST" ~ "(" ~ statement_list? ~ ")" }