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First stab at operator overloading

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When no built-in interpretation is found for one of the operators
mentioned below, the typechecker will try to turn it into a method
call with the name written next to it. For binary operators, the
method will be called on the LHS with the RHS as only parameter.

Binary:

    +   op_add
    -   op_sub
    *   op_mul
    /   op_div
    %   op_rem
    &   op_and
    |   op_or
    ^   op_xor
    <<  op_shift_left
    >>  op_shift_right
    >>> op_ashift_right

Unary:

    -   op_neg
    !   op_not

Overloading of the indexing ([]) operator isn't finished yet.

Issue #1520
This commit is contained in:
Marijn Haverbeke 2012-01-26 12:26:14 +01:00
parent 1792d9ec96
commit 87b064b249
10 changed files with 269 additions and 142 deletions
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5
src/comp/syntax/ast_util.rs
View file

@ -326,6 +326,11 @@ fn ident_to_path(s: span, i: ident) -> @path {
@respan(s, {global: false, idents: [i], types: []})
}
// Provides an extra node_id to hang callee information on, in case the
// operator is deferred to a user-supplied method. The parser is responsible
// for reserving this id.
fn op_expr_callee_id(e: @expr) -> node_id { e.id - 1 }
// Local Variables:
// mode: rust
// fill-column: 78;