989e18b760
Replace the bare-paren tuple grammar with explicit, position-unambiguous
forms, mirroring how structs work:
type `(A, B)` -> `Tuple(A, B)` (named keeps `:`)
value `(a, b)` -> `.(a, b)` (named uses `=`)
typed (new) -> `Tuple(A, B).(a, b)` (like `Point.{...}`)
failable `-> (T, !)` -> `-> T !`
`-> (T1, T2, !)`-> `-> Tuple(T1, T2) !` (channel outside Tuple)
Bare `(...)` is now grouping only, everywhere; a comma in bare parens is a
hard error with a migration hint. Grouping, function types `(A, B) -> R`,
param lists, lambdas, and match bindings are unaffected.
`Tuple(...)` is strictly a TYPE in every position (including `size_of` /
`type_info` args); a tuple VALUE comes only from `.(...)` (anonymous) or
`Tuple(...).(...)` (explicitly typed). A bare `Tuple(1, 2)` is a tuple
type with non-type elements -> rejected.
The ~110 tuple-bearing corpus files were migrated with a one-shot
AST-aware migrator (the `sx migrate` tool from the prior commit, removed
here). New examples: 0130 (new syntax), 0131 (typed construction), 1060
(named-tuple failable return). 1116 golden updated for the new hint text.
107 lines
2.4 KiB
Plaintext
107 lines
2.4 KiB
Plaintext
#import "modules/std.sx";
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#import "modules/math";
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#import "modules/build.sx";
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#import "modules/std/test.sx";
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pkg :: #import "tests/fixtures/testpkg";
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Perms :: enum flags { read; write; execute; }
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WindowFlags :: enum flags u32 { vsync :: 64; resizable :: 4; hidden :: 128; }
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// --- Top-level functions ---
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main :: () {
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// ========================================================
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// 9. FLAGS
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// ========================================================
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print("=== 9. Flags ===\n");
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// Combine flags
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perm : Perms = .read | .write;
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print("flags: {}\n", perm);
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// Test flag
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if perm & .read { print("has-read: yes\n"); }
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if perm & .execute { print("has-exec: yes\n"); }
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// Test flag negative
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pt : Perms = .write;
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if pt & .read {
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print("flags-neg: has-read\n");
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} else {
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print("flags-neg: no-read\n");
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}
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// Single flag
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ps : Perms = .execute;
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print("flags-single: {}\n", ps);
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// All flags
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pall : Perms = .read | .write | .execute;
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print("flags-all: {}\n", pall);
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// Cast to int
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print("flags-raw: {}\n", cast(i64) perm);
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// Flags with explicit values
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wf : WindowFlags = .vsync | .resizable;
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print("flags-explicit: {}\n", wf);
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print("flags-explicit-raw: {}\n", cast(i64) wf);
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// --- Multi-target assignment (swap) ---
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print("--- swap ---\n");
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// Variable swap
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{
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sa := 10;
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sb := 20;
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sa, sb = sb, sa;
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print("var swap: {} {}\n", sa, sb);
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}
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// Array element swap
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{
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sarr : [3]i64 = .[1, 2, 3];
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sarr[0], sarr[2] = sarr[2], sarr[0];
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print("arr swap: {} {}\n", sarr[0], sarr[2]);
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}
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// 3-way rotation
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{
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ra := 1;
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rb := 2;
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rc := 3;
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ra, rb, rc = rc, ra, rb;
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print("3-way: {} {} {}\n", ra, rb, rc);
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}
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// --- Tuple destructuring ---
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print("--- destructure ---\n");
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// Basic tuple destructuring
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{
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da, db := .(10, 20);
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print("basic: {} {}\n", da, db);
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}
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// Destructure from function return
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{
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dswap :: (a: i64, b: i64) -> Tuple(i64, i64) { .(b, a) }
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dx, dy := dswap(1, 2);
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print("fn: {} {}\n", dx, dy);
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}
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// Discard with _
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{
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_, dsecond := .(100, 200);
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print("discard: {}\n", dsecond);
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}
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// Three elements
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{
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da3, db3, dc3 := .(1, 2, 3);
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print("triple: {} {} {}\n", da3, db3, dc3);
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}
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}
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