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Simplify methods explanation in 047
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1 changed files with 7 additions and 13 deletions
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@ -18,14 +18,14 @@
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//
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//
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// Foo.hello();
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// Foo.hello();
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//
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//
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// 3. The NEAT feature of these functions is that if they take either
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// 3. The NEAT feature of these functions is that if their first argument
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// an instance of the struct or a pointer to an instance of the struct
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// is an instance of the struct (or a pointer to one) then we can use
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// then they have some syntax sugar:
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// the instance as the namespace instead of the type:
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//
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//
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// const Bar = struct{
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// const Bar = struct{
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// pub fn a(self: Bar) void { _ = self; }
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// pub fn a(self: Bar) void {}
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// pub fn b(this: *Bar, other: u8) void { _ = this; _ = other; }
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// pub fn b(this: *Bar, other: u8) void {}
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// pub fn c(bar: *const Bar) void { _ = bar; }
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// pub fn c(bar: *const Bar) void {}
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// };
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// };
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//
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//
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// var bar = Bar{};
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// var bar = Bar{};
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@ -37,10 +37,6 @@
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// self, others use a lowercase version of the type name, but feel
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// self, others use a lowercase version of the type name, but feel
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// free to use whatever is most appropriate.
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// free to use whatever is most appropriate.
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//
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//
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// Effectively, the method syntax sugar just does this transformation:
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// thing.function(args);
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// @TypeOf(thing).function(thing, args);
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//
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// Okay, you're armed.
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// Okay, you're armed.
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//
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//
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// Now, please zap the alien structs until they're all gone or
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// Now, please zap the alien structs until they're all gone or
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@ -66,9 +62,7 @@ const HeatRay = struct {
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// We love this method:
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// We love this method:
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pub fn zap(self: HeatRay, alien: *Alien) void {
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pub fn zap(self: HeatRay, alien: *Alien) void {
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alien.health -|= self.damage; // Saturating inplace substraction
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alien.health -= if (self.damage >= alien.health) alien.health else self.damage;
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// It subtracts but doesn't go below the
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// lowest value for our type (in this case 0)
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}
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}
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};
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};
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