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30 lines
802 B
Zig
30 lines
802 B
Zig
//
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// It's important to note that variable pointers and constant pointers
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// are different types.
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//
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// Given:
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//
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// var foo: u8 = 5;
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// const bar: u8 = 5;
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//
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// Then:
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//
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// &foo is of type "*u8"
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// &bar is of type "*const u8"
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//
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// You can always make a const pointer to a mutable value (var), but
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// you cannot make a var pointer to an immutable value (const).
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// This sounds like a logic puzzle, but it just means that once data
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// is declared immutable, you can't coerce it to a mutable type.
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// Think of mutable data as being volatile or even dangerous. Zig
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// always lets you be "more safe" and never "less safe."
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//
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const std = @import("std");
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pub fn main() void {
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const a: u8 = 12;
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const b: *u8 = &a; // fix this!
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std.debug.print("a: {}, b: {}\n", .{ a, b.* });
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}
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