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gh-136616: Improve assert syntax error messages (#136653)

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This commit is contained in:
sobolevn
2025-09-09 23:26:22 +03:00
committed by GitHub
parent 66ef16105a
commit 6bc65c30ff
4 changed files with 594 additions and 400 deletions
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15
Grammar/python.gram
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@@ -212,7 +212,9 @@ del_stmt[stmt_ty]:
yield_stmt[stmt_ty]: y=yield_expr { _PyAST_Expr(y, EXTRA) }
assert_stmt[stmt_ty]: 'assert' a=expression b=[',' z=expression { z }] { _PyAST_Assert(a, b, EXTRA) }
assert_stmt[stmt_ty]:
| invalid_assert_stmt
| 'assert' a=expression b=[',' z=expression { z }] { _PyAST_Assert(a, b, EXTRA) }
import_stmt[stmt_ty]:
| invalid_import
@@ -1302,6 +1304,17 @@ invalid_raise_stmt:
invalid_del_stmt:
| 'del' a=star_expressions {
RAISE_SYNTAX_ERROR_INVALID_TARGET(DEL_TARGETS, a) }
invalid_assert_stmt:
| 'assert' a=expression '=' b=expression {
RAISE_SYNTAX_ERROR_KNOWN_RANGE(
a, b,
"cannot assign to %s here. Maybe you meant '==' instead of '='?",
_PyPegen_get_expr_name(a)) }
| 'assert' expression ',' a=expression '=' b=expression {
RAISE_SYNTAX_ERROR_KNOWN_RANGE(
a, b,
"cannot assign to %s here. Maybe you meant '==' instead of '='?",
_PyPegen_get_expr_name(a)) }
invalid_block:
| NEWLINE !INDENT { RAISE_INDENTATION_ERROR("expected an indented block") }
invalid_comprehension: