fix(Lezer grammar): Pipelines require paranthesis (#5194)

vanillajonathan · pre-commit-ci[bot] · web-flow · commit fd7706d64ca5 · 2025-03-18T09:43:49.000-07:00
Co-authored-by: pre-commit-ci[bot] &lt;66853113+pre-commit-ci[bot]@users.noreply.github.com&gt;
diff --git a/grammars/prql-lezer/src/prql.grammar b/grammars/prql-lezer/src/prql.grammar
@@ -24,7 +24,7 @@ Module { kw<"module"> Identifier "{" statements "}" }
 
 pipelineStatement { Pipeline (~ambigNewline newline+ | end)}
 
-Pipeline { CallExpression (pipe CallExpression)* }
+Pipeline { CallExpression (pipe CallExpression)* | expression "|" Identifier }
 
 pipe { "|" | ~ambigNewline newline+ }
 
diff --git a/grammars/prql-lezer/test/misc.txt b/grammars/prql-lezer/test/misc.txt
@@ -187,3 +187,13 @@ module foo {
 ==>
 
 Query(Module(module,Identifier,VariableDeclaration(let,VariableName,Equals,Lambda(SString))))
+
+# Pipeline within tuple
+
+derive {
+  a = (b | math.abs)
+}
+
+==>
+
+Query(Pipeline(CallExpression(Identifier,ArgList(TupleExpression(DeclarationTuple(DeclarationItem,Equals,NestedPipeline(Pipeline(Identifier,Identifier))))))))
