33 lines
1,015 B
Zig
33 lines
1,015 B
Zig
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const std = @import("std");
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/// A signature for a 'parse' function. It takes a string and returns an error or a value.
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///
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/// This function should *not* be called directly, but rather through the `parse` field of a `Marker`.
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pub fn ParseSignature(comptime T: type) type {
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return *const fn (value: []const u8) anyerror!T;
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}
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pub const num = @import("./num.zig").num;
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pub const boolean = @import("./boolean.zig").boolean;
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pub const enumLiteral = @import("./enumLiteral.zig").enumLiteral;
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test "valid parser signatures" {
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const t = std.testing;
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try t.expectEqual(ParseSignature(u8), @TypeOf(num(u8)));
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try t.expectEqual(ParseSignature(bool), @TypeOf(&boolean));
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const Enum = enum { Value, Other };
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try t.expectEqual(ParseSignature(Enum), @TypeOf(enumLiteral(Enum)));
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}
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comptime {
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const builtin = @import("builtin");
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if (builtin.is_test) {
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std.mem.doNotOptimizeAway(num);
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std.mem.doNotOptimizeAway(boolean);
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std.mem.doNotOptimizeAway(enumLiteral);
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}
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}
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