6c95b2ae72
sx's '=>' body form (already used for lambdas) works today for top-level function declarations and struct member methods. Pin the surface with examples/139-expression-bodied-fn.sx so a parser regression here surfaces immediately. Coverage: - module-top: double :: (x: s32) -> s32 => x * 2; - niladic: answer :: () -> s32 => 42; - struct method: total :: (self: *Point) -> s32 => self.x + self.y; Next: extend the same form to '#objc_class' member methods (the M2.1(a/b) class-constant + class-method overrides path).
37 lines
843 B
Plaintext
37 lines
843 B
Plaintext
// M1.0 — expression-bodied function declarations.
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//
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// sx's `=>` body form (already used for lambdas) extends to
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// top-level and struct-member function declarations:
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//
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// name :: (params) -> RetType => expr;
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//
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// Pins three positions: module-top, struct method, niladic.
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#import "modules/std.sx";
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double :: (x: s32) -> s32 => x * 2;
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sum :: (a: s32, b: s32) -> s32 => a + b;
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answer :: () -> s32 => 42;
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Point :: struct {
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x: s32;
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y: s32;
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total :: (self: *Point) -> s32 => self.x + self.y;
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scaled :: (self: *Point, by: s32) -> s32 => (self.x + self.y) * by;
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}
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main :: () -> s32 {
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print("double: {}\n", double(7));
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print("sum: {}\n", sum(3, 4));
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print("answer: {}\n", answer());
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p := Point.{ x = 10, y = 20 };
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print("total: {}\n", p.total());
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print("scaled: {}\n", p.scaled(3));
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0;
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}
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