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Ran 05 Oct 2026 09:33AM UTC

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Build # 37290580929

Build Type

push

github

Committed by

web-flow

Commit Message

Bracket nested prefix operators when generating (#219)

* Bracket nested prefix operators when generating

For an AST without source locations, the generator printed a prefix
operator (`!`, unary `+`/`-`) directly followed by its operand. When the
operand was itself a prefix operation, this gave `- - ?x` or `+ - ?x`,
which the parser rejects: SPARQL only allows a PrimaryExpression after
`+` and `-`, and in SPARQL 1.1 also after `!`.

The generator now brackets an operand that is itself a prefix operation:
`- ( - ?x )`. This also applies to `!` in SPARQL 1.2, where `! ! ?x` is
valid, to keep the rule simple; the generated output for 01.not-not
changes accordingly.

The new fixture nested-prefix-operators fails on main.

* Share the prefix operator list between expression and solution modifiers

`expression` and the HAVING/GROUP BY generation each kept their own
list of prefix operators. Both now use one shared map.

* Keep the shared prefix operator map in expression.ts

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