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Basic 'use' syntax for importing custom predicates (#286)

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* Basic 'use' syntax for importing custom predicates

* Add extra test for unknown batches

* Fix unused import

* Enforce that imports must match number of predicates in a batch
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Rob Knight 2025-06-13 19:09:08 +02:00 • committed by GitHub
parent f7bb6af219
commit 21ab3c2d0d
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6 changed files with 499 additions and 136 deletions
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9
src/lang/grammar.pest
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@ -1,4 +1,4 @@
// Grammar for the "Podlog" language. Used for describing POD2 Custom
// Grammar for the "Podlang" language. Used for describing POD2 Custom
// Predicates and Proof Requests.
// Silent rules (`_`) are automatically handled by Pest between other rules.
@ -27,7 +27,12 @@ arg_section = {
public_arg_list = { identifier ~ ("," ~ identifier)* }
private_arg_list = { identifier ~ ("," ~ identifier)* }
document = { SOI ~ (custom_predicate_def | request_def)* ~ EOI }
document = { SOI ~ (use_statement | custom_predicate_def | request_def)* ~ EOI }
use_statement = { "use" ~ use_predicate_list ~ "from" ~ batch_ref }
use_predicate_list = { import_name ~ ("," ~ import_name)* }
import_name = { identifier | "_" }
batch_ref = { literal_raw }
request_def = { "REQUEST" ~ "(" ~ statement_list? ~ ")" }