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PEP 465: a dedicated infix operator for matrix multiplication (closes #21176)

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This commit is contained in:
Benjamin Peterson 2014-04-09 23:55:56 -04:00
parent 2aad6ef774
commit d51374ed78
42 changed files with 803 additions and 442 deletions
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8
Python/ast.c
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@ -825,6 +825,8 @@ get_operator(const node *n)
return Sub;
case STAR:
return Mult;
case AT:
return MatMult;
case SLASH:
return Div;
case DOUBLESLASH:
@ -1030,6 +1032,8 @@ ast_for_augassign(struct compiling *c, const node *n)
return Pow;
else
return Mult;
case '@':
return MatMult;
default:
PyErr_Format(PyExc_SystemError, "invalid augassign: %s", STR(n));
return (operator_ty)0;
@ -2266,7 +2270,7 @@ ast_for_expr(struct compiling *c, const node *n)
and_expr: shift_expr ('&' shift_expr)*
shift_expr: arith_expr (('<<'|'>>') arith_expr)*
arith_expr: term (('+'|'-') term)*
term: factor (('*'|'/'|'%'|'//') factor)*
term: factor (('*'|'@'|'/'|'%'|'//') factor)*
factor: ('+'|'-'|'~') factor | power
power: atom trailer* ('**' factor)*
*/
@ -2577,7 +2581,7 @@ ast_for_expr_stmt(struct compiling *c, const node *n)
/* expr_stmt: testlist_star_expr (augassign (yield_expr|testlist)
| ('=' (yield_expr|testlist))*)
testlist_star_expr: (test|star_expr) (',' test|star_expr)* [',']
augassign: '+=' | '-=' | '*=' | '/=' | '%=' | '&=' | '|=' | '^='
augassign: '+=' | '-=' | '*=' | '@=' | '/=' | '%=' | '&=' | '|=' | '^='
| '<<=' | '>>=' | '**=' | '//='
test: ... here starts the operator precendence dance
*/