bdd0e96d78
A block's value is now its last statement ONLY when that statement is a trailing expression with no `;`. A trailing `;` discards the value, leaving the block void. This makes value-vs-statement explicit and lets the compiler reject "this block was supposed to produce a value". Compiler: - Parser records `Block.produces_value` (last stmt is a no-`;` trailing expression) + `Block.discarded_semi` (the `;` that discarded a value), via `expectSemicolonAfter`. A trailing expression before `}` may now omit its `;` (previously a parse error). Match-arm and else-arm bodies are built value-producing regardless of the arm `;` (arms are exempt — the `;` is an arm terminator). - Lowering: `lowerBlockValue` / the block-expr path / `inferExprType` respect `produces_value`. A value-position block that discards its value is a hard error (`lowerValueBody` for function bodies; the value-context `.block` path for if/else branches, `catch` bodies, value bindings, match arms). Pure-failable `-> !` bodies (value rides the error channel) and a value-if whose branches are void are handled without false errors. - `defer`/`onfail` cleanup bodies lower as statements (void), so a trailing `;` there is fine. Migration (behavior-preserving — output unchanged): - stdlib + ~210 examples: dropped the trailing `;` on value-position last expressions. `format` now ends with an explicit `#insert "return result;"` (it relied on `#insert`-as-block-value, which `;` discards). - Two `main :: () -> s32` examples that relied on the old silent default-return got an explicit trailing `0`. - Rejection snapshots 0412 / 1013 regenerated (their quoted source lines lost a `;`); the diagnostics themselves are unchanged. Docs/tests: specs.md "Block values" section; examples 0040 (rules) + 0041 (rejection); 3 parser unit tests. Filed issue 0066 (pre-existing match-arm negated-literal phi-width quirk, surfaced not caused here). Gates: zig build, zig build test, run_examples.sh -> 343 passed, cross_compile.sh -> 7 passed (also refreshed its stale example names).
28 lines
911 B
Plaintext
28 lines
911 B
Plaintext
// Phase 1 step 1.2 (PLAN-FFI.md): parser coverage for `#jni_call`
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// and `#jni_static_call`. Same `#<intrinsic>(ReturnT)(args...)`
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// shape as `#objc_call`; lands green on the existing parse rule
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// (Phase 1.1 added all three).
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//
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// `inline if false` suppresses sema/codegen — the lowering arrives
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// in Phase 1.15+; this file pins the parse surface only.
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#import "modules/std.sx";
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main :: () -> s32 {
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inline if false {
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env : *void = null;
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#jni_env(env) {
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// Instance method: target, name, sig, args...
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#jni_call(*void)(null, "getWindow", "()Landroid/view/Window;");
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// Static method: class, name, sig, args...
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#jni_static_call(s32)(null, "max", "(II)I", 3, 7);
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// Returning a Java primitive (jboolean → sx bool).
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#jni_call(bool)(null, "isShown", "()Z");
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}
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}
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print("parse-only ok\n");
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0
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}
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