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sx/examples/basic/0028-basic-functions.sx
agra 66bdc70bf1 test: group examples into per-category folders
Move examples/*.sx and their expected/ snapshots into per-category
subfolders (examples/<category>/...). Folder = leading filename token,
with ffi-objc/ffi-jni kept whole; filenames are unchanged. The corpus
runner and LSP sweep now discover each category's expected/ dir, while
issues/ stays flat. Example 1058's repo-root-relative companion import
is made file-relative. Path strings embedded in 164 snapshots were
regenerated (path-only changes). Test-layout docs in CLAUDE.md updated.
2026-06-21 14:41:34 +03:00

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#import "modules/std.sx";
#import "modules/math";
#import "modules/build.sx";
#import "modules/std/test.sx";
pkg :: #import "tests/fixtures/testpkg";
add :: (a: i32, b: i32) -> i32 { a + b }
mul :: (a: i32, b: i32) -> i32 { a * b }
identity :: (x: $T) -> T { x }
pair_add :: (a: $T, b: $U) -> i64 {
cast(i64) a + cast(i64) b
}
typed_sum :: (..args: []i32) -> i32 {
result := 0;
for args (it) { result = result + it; }
result
}
apply :: (f: (i32, i32) -> i32, x: i32, y: i32) -> i32 {
f(x, y)
}
void_return :: () {
return;
}
implicit_return :: (x: i32) -> i32 {
x * 2
}
early_return :: (x: i32) -> i32 {
if x > 10 { return 99; }
x
}
main :: () {
// ========================================================
// 5. FUNCTIONS & DECLARATIONS
// ========================================================
print("=== 5. Functions ===\n");
// Constant binding
FORTY_TWO :: 42;
print("const: {}\n", FORTY_TWO);
// Typed constant
TYPED_PI : f64 : 3.14;
print("typed-const: {}\n", TYPED_PI);
// Variable with default init
di : i32;
print("default-init: {}\n", di);
// Implicit return
print("implicit-ret: {}\n", implicit_return(21));
// Explicit return
print("early-ret: {}\n", early_return(5));
print("early-ret2: {}\n", early_return(20));
// Void return
void_return();
print("void-return: ok\n");
// Generic — single param
print("generic-i32: {}\n", identity(42));
print("generic-f32: {}\n", identity(1.5));
print("generic-bool: {}\n", identity(true));
// Generic — multiple params
print("generic-multi: {}\n", pair_add(10, 20));
// Lambda
double :: (x: i32) => x * 2;
print("lambda: {}\n", double(7));
// Lambda with return type
halve :: (x: f32) -> f32 => x / 2.0;
print("lambda-ret: {}\n", halve(10.0));
// Local function (non-lambda)
local_add :: (a: i32, b: i32) -> i32 { a + b }
print("local-fn: {}\n", local_add(3, 4));
// Nested function calls
print("fn-nested: {}\n", add(mul(2, 3), mul(4, 5)));
// Variadic (typed)
print("varargs: {}\n", typed_sum(1, 2, 3, 4, 5));
// Spread
spread_arr : [3]i32 = .[10, 20, 30];
print("spread: {}\n", typed_sum(..spread_arr));
// Function pointers
fp : (i32, i32) -> i32 = add;
print("fp: {}\n", fp(3, 4));
fp = mul;
print("fp-reassign: {}\n", fp(3, 4));
print("fp-apply: {}\n", apply(add, 10, 20));
}