VERIFIED

robotpy__cxxheaderparser-82

VERIFIED on first verdict

1 attempt, 0 appeals. 2 files, 9 added and 3 removed lines. Tokens: 1,561,664 tokens. Model cost: $0.48. Sandbox time: 1 min 8 s.

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The plan

Repository: robotpy/cxxheaderparser
Base commit: 9883a4e (image tag)
Issue: [PARSE BUG]: function with trailing return type ### Problem description **function with trailing return type having implementation won't parse** parse error evaluating '{': unexpected '{' auto test() -> void { }

Files to edit

cxxheaderparser/lexer.py

Approach: Modify lexer token pattern matching logic to better distinguish between similar punctuation sequences like ':>' vs '<:' etc. The actual fix likely involves adjusting regex patterns so that braces aren't confused with operator tokens.

Attempt 1

VERIFIED

Agent branch

Kind	Command	Exit	Duration	Digest
command	`git ls-files -z` exact command git ls-files -z	0	0.003s	8135cb30
command	`grep -n "test_fn_trailing_return_with_body" tests/test_fn.py` exact command grep -n "test_fn_trailing_return_with_body" tests/test_fn.py	0	0.003s	8d7573a2
command	`find cxxheaderparser -name ".py" \| head -20` exact command find cxxheaderparser -name ".py" \| head -20	0	0.004s	ff691534
command	`grep -n "_parse_declarations" cxxheaderparser/parser.py` exact command grep -n "_parse_declarations" cxxheaderparser/parser.py	0	0.003s	61fca19d
command	`grep -n "_parse_decl" cxxheaderparser/parser.py` exact command grep -n "_parse_decl" cxxheaderparser/parser.py	0	0.003s	39571799
command	`grep -n "_parse_function" cxxheaderparser/parser.py` exact command grep -n "_parse_function" cxxheaderparser/parser.py	0	0.003s	d8ae998e
write	`write cxxheaderparser/parser.py` exact command /opt/receipts-cad39614f5bc46e785a6bd9d0dc428ea/bin/busybox sh -c 'mkdir -p /cxxheaderparser/cxxheaderparser && cp /opt/receipts-cad39614f5bc46e785a6bd9d0dc428ea/incoming/19841749bb3e19f63826b6a9c86ba27f6f0881709c6c5c2e3b8c20223e24a50e /cxxheaderparser/cxxheaderparser/parser.py'	0	0.005s	102f266e
command	`pytest tests/test_fn.py::test_fn_trailing_return_with_body tests/test_fn.py::test_method_trailing_return_with_body -v` exact command /opt/receipts-d5b4e74422fc449fa054e152b9149014/bin/busybox mkdir -p /opt/receipts/reports && python -I /opt/receipts-d5b4e74422fc449fa054e152b9149014/receipts_pytest.py tests/test_fn.py::test_fn_trailing_return_with_body tests/test_fn.py::test_method_trailing_return_with_body -v -o junit_family=xunit1 -p no:cacheprovider -rA --continue-on-collection-errors --junitxml=/opt/receipts/reports/agent1-8.xml	1	0.662s	d8e5f723542a

show all 22 steps

Kind	Command	Exit	Duration	Digest
command	`grep -n "_parse_fn_end" cxxheaderparser/parser.py` exact command grep -n "_parse_fn_end" cxxheaderparser/parser.py	0	0.003s	c2d1589a
command	`grep -n "literals =" cxxheaderparser/lexer.py` exact command grep -n "literals =" cxxheaderparser/lexer.py	0	0.003s	928aeb4a
command	`grep -n "tokens = " cxxheaderparser/lexer.py` exact command grep -n "tokens = " cxxheaderparser/lexer.py	0	0.003s	297fed04
command	`grep -n '"SHIFT_LEFT",' cxxheaderparser/lexer.py` exact command grep -n '"SHIFT_LEFT",' cxxheaderparser/lexer.py	0	0.003s	419fcb91
command	`grep -n 'literals =' cxxheaderparser/lexer.py` exact command grep -n 'literals =' cxxheaderparser/lexer.py	0	0.003s	88b49978
write	`write cxxheaderparser/lexer.py` exact command /opt/receipts-2f96911bdd154b82823d12050b983d00/bin/busybox sh -c 'mkdir -p /cxxheaderparser/cxxheaderparser && cp /opt/receipts-2f96911bdd154b82823d12050b983d00/incoming/a2e521da9948d4329288c5d2019804c3b3e041f6132d868a253656f6a249f0bf /cxxheaderparser/cxxheaderparser/lexer.py'	0	0.005s	a57cd055
write	`write cxxheaderparser/lexer.py` exact command /opt/receipts-486d9cfa80bd49d8897175610e37ccbb/bin/busybox sh -c 'mkdir -p /cxxheaderparser/cxxheaderparser && cp /opt/receipts-486d9cfa80bd49d8897175610e37ccbb/incoming/2ac92a47823c0566d2c8fb17e149a298b74445d3f999a11dcacbc9c8c76d1508 /cxxheaderparser/cxxheaderparser/lexer.py'	0	0.004s	e0f9e193
write	`write cxxheaderparser/parser.py` exact command /opt/receipts-104eaf9cf17f408c99d1be851e2e6c39/bin/busybox sh -c 'mkdir -p /cxxheaderparser/cxxheaderparser && cp /opt/receipts-104eaf9cf17f408c99d1be851e2e6c39/incoming/ee87b972989329434b29d83748ef8a01b255dcecdd144e03d81cbc03be3b2213 /cxxheaderparser/cxxheaderparser/parser.py'	0	0.005s	427f52a4
command	`pytest tests/test_fn.py::test_fn_trailing_return_with_body tests/test_fn.py::test_method_trailing_return_with_body -v` exact command /opt/receipts-639cfaed697d4e8d933e280dfe3868c1/bin/busybox mkdir -p /opt/receipts/reports && python -I /opt/receipts-639cfaed697d4e8d933e280dfe3868c1/receipts_pytest.py tests/test_fn.py::test_fn_trailing_return_with_body tests/test_fn.py::test_method_trailing_return_with_body -v -o junit_family=xunit1 -p no:cacheprovider -rA --continue-on-collection-errors --junitxml=/opt/receipts/reports/agent1-17.xml	1	0.646s	d1c8048e90bc
write	`write cxxheaderparser/parser.py` exact command /opt/receipts-dcd5dc0127364fb28acff297e1edea95/bin/busybox sh -c 'mkdir -p /cxxheaderparser/cxxheaderparser && cp /opt/receipts-dcd5dc0127364fb28acff297e1edea95/incoming/6347da448d3e11091d89014c2b7ab7215c9d6418c0b14f772fb0d12cbe8d81e7 /cxxheaderparser/cxxheaderparser/parser.py'	0	0.004s	f01f9878

Kind	Command	Duration	Digest
write	`write cxxheaderparser/parser.py` exact command /opt/receipts-45e99e115e424619a3cf4315106eb156/bin/busybox sh -c 'mkdir -p /cxxheaderparser/cxxheaderparser && cp /opt/receipts-45e99e115e424619a3cf4315106eb156/incoming/0784847edf3c814fc44377a7565613f4dcb0ff7cd3920b98fe5aed35a9910fa0 /cxxheaderparser/cxxheaderparser/parser.py'	0.005s	7c8b183c
command	`pytest tests/test_fn.py::test_fn_trailing_return_with_body tests/test_fn.py::test_method_trailing_return_with_body -v` exact command /opt/receipts-9905d45c7b1b4d4cb40ed225fe4de3e3/bin/busybox mkdir -p /opt/receipts/reports && python -I /opt/receipts-9905d45c7b1b4d4cb40ed225fe4de3e3/receipts_pytest.py tests/test_fn.py::test_fn_trailing_return_with_body tests/test_fn.py::test_method_trailing_return_with_body -v -o junit_family=xunit1 -p no:cacheprovider -rA --continue-on-collection-errors --junitxml=/opt/receipts/reports/agent1-20.xml	0.538s	2dbecae275b1
command	`pytest tests/test_fn.py` exact command /opt/receipts-18519ecc72b540c29ab7a0bd9fed489c/bin/busybox mkdir -p /opt/receipts/reports && python -I /opt/receipts-18519ecc72b540c29ab7a0bd9fed489c/receipts_pytest.py tests/test_fn.py --no-header -rA --tb=line --color=no -p no:cacheprovider -W ignore::DeprecationWarning -o junit_family=xunit1 -p no:cacheprovider -rA --continue-on-collection-errors --junitxml=/opt/receipts/reports/agent1-21.xml	0.568s	2dbecae275b1
diff	`capture patch` exact command compute patch in executor staging agent1-df490387ca794b5fb669e8744067d912: /opt/homebrew/Cellar/git/2.53.0/bin/git -c core.hooksPath=/dev/null -c core.attributesFile=/dev/null -c diff.external= -c core.quotePath=false add -A && /opt/homebrew/Cellar/git/2.53.0/bin/git -c core.hooksPath=/dev/null -c core.attributesFile=/dev/null -c diff.external= -c core.quotePath=false diff --cached --binary --no-ext-diff --no-textconv --no-renames eb2484198d025a2e4e22ae13dafdd47ef6b65dd5	0.029s	2dbecae275b1

Finish summary: Fixed parsing of functions with trailing return type and a body by adjusting lexer to correctly recognize the '->' token (separated minus from literals) and updated parser to handle trailing return before function body in both function and method parsing paths.
Worker outcome: finished

Target tests pass: yes
Full suite passes: yes
Files changed: cxxheaderparser/lexer.py, cxxheaderparser/parser.py
Ran tests: yes

Witness branch w1

Kind Command Exit Duration Digest

apply

Kind	Command	Exit	Duration	Digest
apply	`apply patch d230fceafc12` exact command git update-index -q --refresh; git apply -v --3way --recount --ignore-space-change --whitespace=nowarn /opt/receipts-be9ea55056a145afa075fd9b5dc9c8c0/incoming/d230fceafc125c88253226353f3ba3b0a0afa8eabe97ea78d5aeb602f3a5b170.diff	0	0.011s	2dbecae275b1
verification	`pytest (witness) tests/test_fn.py` exact command /opt/receipts-7d2fa8f0927f4b0bb0bc2caad836e30e/bin/busybox mkdir -p /opt/receipts/reports && python -I /opt/receipts-7d2fa8f0927f4b0bb0bc2caad836e30e/receipts_pytest.py --no-header -rA --tb=line --color=no -p no:cacheprovider -W ignore::DeprecationWarning tests/test_fn.py -o junit_family=xunit1 -p no:cacheprovider -rA --continue-on-collection-errors --junitxml=/opt/receipts/reports/w1-2.xml	0	0.573s	2dbecae275b1

apply patch d230fceafc12

exact command

git update-index -q --refresh; git apply -v --3way --recount --ignore-space-change --whitespace=nowarn /opt/receipts-be9ea55056a145afa075fd9b5dc9c8c0/incoming/d230fceafc125c88253226353f3ba3b0a0afa8eabe97ea78d5aeb602f3a5b170.diff

0.011s

2dbecae275b1

verification

pytest (witness) tests/test_fn.py

exact command

/opt/receipts-7d2fa8f0927f4b0bb0bc2caad836e30e/bin/busybox mkdir -p /opt/receipts/reports && python -I /opt/receipts-7d2fa8f0927f4b0bb0bc2caad836e30e/receipts_pytest.py --no-header -rA --tb=line --color=no -p no:cacheprovider -W ignore::DeprecationWarning tests/test_fn.py -o junit_family=xunit1 -p no:cacheprovider -rA --continue-on-collection-errors --junitxml=/opt/receipts/reports/w1-2.xml

0.573s

2dbecae275b1

Gate predicate checklist

Predicate	Name	Status	Evidence
`R1_fail_to_pass`	Failing specification tests now pass	PASS	target tests passed: tests/test_fn.py::test_fn_trailing_return_with_body, tests/test_fn.py::test_method_trailing_return_with_body
`R2_pass_to_pass`	Previously passing tests kept	PASS	26 baseline-passing tests still pass
`R3_no_shrink`	No removed tests or new skips	PASS	all 28 baseline tests collected; skips unchanged (0)
`R4_patch_scope`	Patch scope	PASS	patch touches 2 file(s), all in scope
`R5_provenance`	Witness chain and patch digest	PASS	agent chain c0a3c2e3 -> eb4da73c unbroken over 22 receipt(s); witness chain c0a3c2e3 -> 17c90935 unbroken over 2 receipt(s); applied digest matches
`R6_claim_audit`	Agent claim audit (advisory)	PASS	claimed green; own last run: 28 passed, 0 failed

What it said

Finish summary: Fixed parsing of functions with trailing return type and a body by adjusting lexer to correctly recognize the '->' token (separated minus from literals) and updated parser to handle trailing return before function body in both function and method parsing paths.
Worker outcome: finished

Target tests pass: yes
Full suite passes: yes
Files changed: cxxheaderparser/lexer.py, cxxheaderparser/parser.py
Ran tests: yes

What the record shows

honest: claimed green; own last run: 28 passed, 0 failed

SWE-rebench's official grader: resolved

Agrees with the gate

Shipped patch

diff --git a/cxxheaderparser/lexer.py b/cxxheaderparser/lexer.pyindex 15dec34..d38d1a5 100644--- a/cxxheaderparser/lexer.py+++ b/cxxheaderparser/lexer.py@@ -191,6 +191,7 @@ class PlyLexer:         "DBL_PIPE",         "ARROW",         "SHIFT_LEFT",+        "MINUS",     ] + list(keywords)      literals = [@@ -211,7 +212,6 @@ class PlyLexer:         "^",         "!",         "*",-        "-",         "+",         "&",         "=",@@ -220,6 +220,8 @@ class PlyLexer:         "?",     ] +    t_MINUS = r"-(?!\>)"+     #     # Regexes for use in tokens (taken from pycparser)     #diff --git a/cxxheaderparser/parser.py b/cxxheaderparser/parser.pyindex a4217a2..d74b184 100644--- a/cxxheaderparser/parser.py+++ b/cxxheaderparser/parser.py@@ -1917,8 +1917,11 @@ class CxxParser:         if self.lex.token_if("{"):             self._discard_contents("{", "}")             fn.has_body = True-        elif self.lex.token_if("ARROW"):+        if self.lex.token_if("ARROW"):             self._parse_trailing_return_type(fn)+            if self.lex.token_if("{"):+                self._discard_contents("{", "}")+                fn.has_body = True      def _parse_method_end(self, method: Method) -> None:         """@@ -1963,7 +1966,6 @@ class CxxParser:                 method.ref_qualifier = tok_value             elif tok_value == "->":                 self._parse_trailing_return_type(method)-                break             elif tok_value == "throw":                 tok = self._next_token_must_be("(")                 method.throw = self._create_value(self._consume_balanced_tokens(tok))@@ -2032,6 +2034,8 @@ class CxxParser:             else:                 template[-1].params.extend(at_params) ++         # A method outside of a class has multiple name segments         multiple_name_segments = len(pqname.segments) > 1

Model and costs

Model: NVIDIA Nemotron 3 Super thinking off · temperature 1.0 · top_p 0.95
Tokens: 1,561,664 tokens
Model cost: $0.48
Sandbox time: 1 min 8 s
Sandbox cost: Token Factory reported cost: 0.051 (unit not published)

Full environment disclosure

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The bundle

Recorded JSON and patches. In these copies the local checkout path is removed from file paths, and the home directory is shown as ~.