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Allow trailing comma after fplist; '=' is no longer comparison;

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expr/assignment statement now allows testlists.
This commit is contained in:
Guido van Rossum 1991-12-31 13:11:56 +00:00
parent 5fca8a1b0d
commit 6cf1273faa
1 changed files with 11 additions and 4 deletions
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15
Grammar/Grammar
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@ -1,4 +1,11 @@
# Grammar for Python, version 8 # Grammar for Python, version 10
# Changes since version 9:
# Equality is now only tested with '=='; consequently
# Exprlist replaced by testlist everywhere except after 'for'
# Changes since version 8:
# Trailing commas in formal parameter lists are allowed
# Changes since version 7: # Changes since version 7:
# New syntax to specify base classes (but old syntax retained for now) # New syntax to specify base classes (but old syntax retained for now)
@ -51,13 +58,13 @@ eval_input: testlist ENDMARKER
funcdef: 'def' NAME parameters ':' suite funcdef: 'def' NAME parameters ':' suite
parameters: '(' [fplist] ')' parameters: '(' [fplist] ')'
fplist: fpdef (',' fpdef)* fplist: fpdef (',' fpdef)* [',']
fpdef: NAME | '(' fplist ')' fpdef: NAME | '(' fplist ')'
stmt: simple_stmt | compound_stmt stmt: simple_stmt | compound_stmt
simple_stmt: small_stmt (';' small_stmt)* [';'] NEWLINE simple_stmt: small_stmt (';' small_stmt)* [';'] NEWLINE
small_stmt: expr_stmt | print_stmt | del_stmt | pass_stmt | flow_stmt | import_stmt | global_stmt small_stmt: expr_stmt | print_stmt | del_stmt | pass_stmt | flow_stmt | import_stmt | global_stmt
expr_stmt: (exprlist '=')* exprlist expr_stmt: (testlist '=')* testlist
# For assignments, additional restrictions enforced by the interpreter # For assignments, additional restrictions enforced by the interpreter
print_stmt: 'print' (test ',')* [test] print_stmt: 'print' (test ',')* [test]
del_stmt: 'del' exprlist del_stmt: 'del' exprlist
@ -81,7 +88,7 @@ test: and_test ('or' and_test)*
and_test: not_test ('and' not_test)* and_test: not_test ('and' not_test)*
not_test: 'not' not_test | comparison not_test: 'not' not_test | comparison
comparison: expr (comp_op expr)* comparison: expr (comp_op expr)*
comp_op: '<'|'>'|'='|'>='|'<='|'<>'|'!='|'=='|'in'|'not' 'in'|'is'|'is' 'not' comp_op: '<'|'>'|'=='|'>='|'<='|'<>'|'!='|'in'|'not' 'in'|'is'|'is' 'not'
expr: xor_expr ('|' xor_expr)* expr: xor_expr ('|' xor_expr)*
xor_expr: and_expr ('^' and_expr)* xor_expr: and_expr ('^' and_expr)*
and_expr: shift_expr ('&' shift_expr)* and_expr: shift_expr ('&' shift_expr)*