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cc: add += and function pointers

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This commit is contained in:
Paul Mathieu 2021-04-17 23:04:30 -07:00
parent 36bc1417b6
commit 2ab6b4a5a9
2 changed files with 8 additions and 2 deletions
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5
tools/cc.ebnf
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@ -55,7 +55,7 @@ initializer_list: "{" [init_list_field ("," init_list_field)* ","? ] "}"
?prec14_expr: prec13_expr ?prec14_expr: prec13_expr
| prec2_expr "=" prec14_expr -> assignment | prec2_expr "=" prec14_expr -> assignment
| prec2_expr "+=" prec14_expr | prec2_expr "+=" prec14_expr -> add_ass
| prec2_expr "-=" prec14_expr | prec2_expr "-=" prec14_expr
| prec2_expr "*=" prec14_expr | prec2_expr "*=" prec14_expr
| prec2_expr "/=" prec14_expr | prec2_expr "/=" prec14_expr
@ -104,7 +104,7 @@ initializer_list: "{" [init_list_field ("," init_list_field)* ","? ] "}"
| "-" prec2_expr | "-" prec2_expr
| "!" prec2_expr -> bool_not | "!" prec2_expr -> bool_not
| "~" prec2_expr | "~" prec2_expr
| "(" type ")" prec2_expr -> cast | "(" (type | funptr_type) ")" prec2_expr -> cast
| "*" prec2_expr -> dereference | "*" prec2_expr -> dereference
| "&" prec2_expr -> address_of | "&" prec2_expr -> address_of
| "sizeof" prec2_expr -> sizeof | "sizeof" prec2_expr -> sizeof
@ -131,6 +131,7 @@ type: type_qualifier* IDENTIFIER
| struct_type | struct_type
| type "*" -> pointer | type "*" -> pointer
?array_size: INT ?array_size: INT
funptr_type: type "(" "*" ")" "(" [fun_param ("," fun_param)*] ")"
?type_qualifier: "volatile" -> volatile ?type_qualifier: "volatile" -> volatile
| "const" -> const | "const" -> const

5
tools/cc.py
View File

@ -376,6 +376,10 @@ class CcTransform(lark.visitors.Transformer):
pointed = children[-1] pointed = children[-1]
return PointerType(volatile=volat, pointed=pointed) return PointerType(volatile=volat, pointed=pointed)
def funptr_type(self, children):
ret, *params = children
return FunType(ret=ret, params=params)
def comma_expr(self, children): def comma_expr(self, children):
c1, c2 = children c1, c2 = children
if c1.data == 'comma_expr': if c1.data == 'comma_expr':
@ -1279,6 +1283,7 @@ class CcInterp(lark.visitors.Interpreter):
return f return f
or_ass = _assign_op('_or') or_ass = _assign_op('_or')
add_ass = _assign_op('add')
def _forward_op(self, tree): def _forward_op(self, tree):
self.visit_children(tree) self.visit_children(tree)