6b0ebdd92b
Protocol method declarations now declare their receiver explicitly as the first parameter — 'self: *Self' (or 'self: Self') — matching the impl method signature, instead of the old implicit-receiver form where the listed params were only the extra args. That asymmetry repeatedly caused confusion over whether the first param was the receiver or an argument. The parser validates the first param is 'self' typed Self/*Self, then strips it, so all downstream lowering and the dispatch ABI are unchanged (impl blocks and call sites are unaffected). A protocol method missing the receiver is now a parse error. Migrated all 129 protocol method signatures across library + examples (+ one inline-sx test in sema.zig) to the explicit form. Updated specs.md + readme.md. New: examples/0418-protocols-explicit-receiver.sx (feature), examples/1190-diagnostics-protocol-missing-receiver.sx (negative/diagnostic).
35 lines
787 B
Plaintext
35 lines
787 B
Plaintext
// `?Protocol = null` — optional protocol boxes use sentinel-shape
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// (ctx == null is the "none" state), so they cost no extra storage
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// beyond the protocol's standard 2-pointer layout. Method calls on
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// a non-null optional protocol auto-unwrap and dispatch through the
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// vtable / inline fn-ptrs as usual.
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#import "modules/std.sx";
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GPU :: protocol {
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ping :: (self: *Self) -> i64;
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}
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Impl :: struct {}
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impl GPU for Impl {
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ping :: (self: *Impl) -> i64 { 42 }
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}
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main :: () -> i32 {
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g : ?GPU = null;
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if g != null {
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print("BAD: g not null at start\n");
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} else {
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print("g initially null\n");
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}
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g = xx @Impl.{};
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if g != null {
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n := g.ping();
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print("after assign: g.ping() = {}\n", n);
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} else {
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print("BAD: g still null after assign\n");
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}
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0
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}
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