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Lazy imports grammar / AST changes

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Dino Viehland 2025-09-16 15:10:28 -07:00
parent fb114cf497
commit 1c691ea756
25 changed files with 1016 additions and 338 deletions
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17
Grammar/python.gram
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@ -121,9 +121,9 @@ simple_stmts[asdl_stmt_seq*]:
simple_stmt[stmt_ty] (memo):
| assignment
| &"type" type_alias
| &('import' | 'from' | "lazy" ) import_stmt
| e=star_expressions { _PyAST_Expr(e, EXTRA) }
| &'return' return_stmt
| &('import' | 'from') import_stmt
| &'raise' raise_stmt
| &'pass' pass_stmt
| &'del' del_stmt
@ -216,7 +216,7 @@ assert_stmt[stmt_ty]:
| invalid_assert_stmt
| 'assert' a=expression b=[',' z=expression { z }] { _PyAST_Assert(a, b, EXTRA) }
import_stmt[stmt_ty]:
import_stmt[stmt_ty](memo):
| invalid_import
| import_name
| import_from
@ -224,13 +224,16 @@ import_stmt[stmt_ty]:
# Import statements
# -----------------
import_name[stmt_ty]: 'import' a=dotted_as_names { _PyAST_Import(a, EXTRA) }
import_name[stmt_ty]:
| 'import' a=dotted_as_names { _PyAST_Import(a, 0, EXTRA) }
| "lazy" 'import' a=dotted_as_names { _PyAST_Import(a, 1, EXTRA) }
# note below: the ('.' | '...') is necessary because '...' is tokenized as ELLIPSIS
import_from[stmt_ty]:
| 'from' a=('.' | '...')* b=dotted_name 'import' c=import_from_targets {
_PyPegen_checked_future_import(p, b->v.Name.id, c, _PyPegen_seq_count_dots(a), EXTRA) }
| 'from' a=('.' | '...')+ 'import' b=import_from_targets {
_PyAST_ImportFrom(NULL, b, _PyPegen_seq_count_dots(a), EXTRA) }
| lazy="lazy"? 'from' a=('.' | '...')* b=dotted_name 'import' c=import_from_targets {
_PyPegen_checked_future_import(p, b->v.Name.id, c, _PyPegen_seq_count_dots(a), lazy ? 1 : 0, EXTRA) }
| lazy="lazy"? 'from' a=('.' | '...')+ 'import' b=import_from_targets {
_PyAST_ImportFrom(NULL, b, _PyPegen_seq_count_dots(a), lazy ? 1 : 0, EXTRA) }
import_from_targets[asdl_alias_seq*]:
| '(' a=import_from_as_names [','] ')' { a }
| import_from_as_names !','