proc vec2[T: Number](x: T; y: T): Vec2[T]
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proc lerp[T: Number](a: T; b: T; t: float): T
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proc zero(): Vec2[float] {...}{.raises: [], tags: [].}-
proc `-`[T: Number](self: Vec2[T]): Vec2[T]
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proc infinity[T: Number](): Vec2[T]
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proc withX[T: Number](self: Vec2[T]; x: Number): Vec2[T]
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proc withY[T: Number](self: Vec2[T]; y: Number): Vec2[T]
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proc lerp[T: Number](self: Vec2[T]; other: Vec2[T]; t: float): Vec2[T]
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proc add[T: Number](self: Vec2[T]; other: Vec2[T]): Vec2[T]
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proc addX[T: Number](self: Vec2[T]; other: T): Vec2[T]
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proc addY[T: Number](self: Vec2[T]; other: T): Vec2[T]
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proc directionTo[T: Number](self: Vec2[T]; other: Vec2[T]): Vec2[T]
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proc sub[T: Number](self: Vec2[T]; other: Vec2[T]): Vec2[T]
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proc angle[T: Number](self: Vec2[T]): T
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proc normalized[T: Number](self: Vec2[T]): Vec2[T]
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proc divide[T: Number](self: Vec2[T]; val: Number): Vec2[T]
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proc divide[T: Number](self: Vec2[T]; other: Vec2[T]): Vec2[T]
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proc mul[T: Number](self: Vec2[T]; other: T): Vec2[T]
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proc mul[T: Number](self: Vec2[T]; other: Vec2[T]): Vec2[T]
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proc mul[T: Number](self: Vec2[T]; otherX: T; otherY: T): Vec2[T]
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proc rotate[T: Number](self: Vec2[T]; rad: Number): Vec2[T]
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proc max[T: Number](self: Vec2[T]; other: Vec2[T]): Vec2[T]
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proc min[T: Number](self: Vec2[T]; other: Vec2[T]): Vec2[T]
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proc abs[T: Number](self: Vec2[T]): Vec2[T]
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proc heightVec[T: Number](self: Vec2[T]): Vec2[T]
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proc widthVec[T: Number](self: Vec2[T]): Vec2
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proc inflate[T: Number](self: Vec2[T]; thickness: Thickness[T]): Vec2[T]
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proc deflate[T: Number](self: Vec2[T]; thickness: Thickness[T]): Vec2[T]
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proc equals[T: Number](self: Vec2[T]; other: Vec2[T]): bool
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proc nonNegative[T: Number](self: Vec2[T]): Vec2[T]
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proc constrain[T: Number](self: Vec2[T]; constraint: Vec2[T]): Vec2[T]
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proc length[T: Number](self: Vec2[T]): T
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proc distanceTo[T: Number](self: Vec2[T]; other: Vec2[T]): T
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proc neg[T: Number](self: Vec2[T]): Vec2[T]
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