Strict parent checks in == methods

Author: fingolfin

src/AbsSeries.jl

@@ -486,8 +486,7 @@ that power series to different precisions may still be arithmetically
 equal to the minimum of the two precisions.
 """
 function ==(x::AbsPowerSeriesRingElem{T}, y::AbsPowerSeriesRingElem{T}) where T <: RingElement
-   b = check_parent(x, y, false)
-   !b && return false
+   check_parent(x, y)
 
    prec = min(precision(x), precision(y))
    m1 = min(length(x), length(y))

src/Fraction.jl

@@ -412,8 +412,7 @@ that power series to different precisions may still be arithmetically
 equal to the minimum of the two precisions.
 """
 function ==(x::FracElem{T}, y::FracElem{T}) where {T <: RingElem}
-   b  = check_parent(x, y, false)
-   !b && return false
+   check_parent(x, y)
 
    return (denominator(x, false) == denominator(y, false) &&
            numerator(x, false) == numerator(y, false)) ||

src/Matrix.jl

@@ -1313,8 +1313,7 @@ that power series to different precisions may still be arithmetically
 equal to the minimum of the two precisions.
 """
 function ==(x::MatrixElem{T}, y::MatrixElem{T}) where {T <: NCRingElement}
-   b = check_parent(x, y, false)
-   !b && return false
+   check_parent(x, y)
    for i = 1:nrows(x)
       for j = 1:ncols(x)
          if x[i, j] != y[i, j]

src/NCPoly.jl

@@ -345,15 +345,13 @@ that power series to different precisions may still be arithmetically
 equal to the minimum of the two precisions.
 """
 function ==(x::NCPolyRingElem{T}, y::NCPolyRingElem{T}) where T <: NCRingElem
-   b = check_parent(x, y, false)
-   !b && return false
+   check_parent(x, y)
    if length(x) != length(y)
       return false
-   else
-      for i = 1:length(x)
-         if coeff(x, i - 1) != coeff(y, i - 1)
-            return false
-         end
+   end
+   for i = 1:length(x)
+      if coeff(x, i - 1) != coeff(y, i - 1)
+         return false
       end
    end
    return true

src/Poly.jl

@@ -898,15 +898,14 @@ that power series to different precisions may still be arithmetically
 equal to the minimum of the two precisions.
 """
 function ==(x::PolyRingElem{T}, y::PolyRingElem{T}) where T <: RingElement
-   b = check_parent(x, y, false)
-   !b && return false
+   check_parent(x, y)
+
    if length(x) != length(y)
       return false
-   else
-      for i = 1:length(x)
-         if coeff(x, i - 1) != coeff(y, i - 1)
-            return false
-         end
+   end
+   for i = 1:length(x)
+      if coeff(x, i - 1) != coeff(y, i - 1)
+         return false
       end
    end
    return true

src/RelSeries.jl

@@ -731,8 +731,7 @@ that power series to different precisions may still be arithmetically
 equal to the minimum of the two precisions.
 """
 function ==(x::RelPowerSeriesRingElem{T}, y::RelPowerSeriesRingElem{T}) where T <: RingElement
-   b = check_parent(x, y, false)
-   !b && return false
+   check_parent(x, y)
 
    xval = valuation(x)
    xprec = precision(x)

src/Residue.jl

@@ -257,8 +257,7 @@ that power series to different precisions may still be arithmetically
 equal to the minimum of the two precisions.
 """
 function ==(a::ResElem{T}, b::ResElem{T}) where {T <: RingElement}
-   fl = check_parent(a, b, false)
-   !fl && return false
+   check_parent(a, b)
    return data(a) == data(b)
 end
 

src/ResidueField.jl

@@ -198,8 +198,7 @@ that power series to different precisions may still be arithmetically
 equal to the minimum of the two precisions.
 """
 function ==(a::ResFieldElem{T}, b::ResFieldElem{T}) where {T <: RingElement}
-   fl = check_parent(a, b, false)
-   !fl && return false
+   check_parent(a, b)
    return data(a) == data(b)
 end
 

src/generic/FreeAssociativeAlgebra.jl

@@ -301,8 +301,7 @@ end
 ###############################################################################
 
 function ==(a::FreeAssociativeAlgebraElem{T}, b::FreeAssociativeAlgebraElem{T}) where T
-    fl = check_parent(a, b, false)
-    !fl && return false
+    check_parent(a, b)
     return a.length == b.length &&
            view(a.exps, 1:a.length) == view(b.exps, 1:b.length) &&
            view(a.coeffs, 1:a.length) == view(b.coeffs, 1:b.length)

src/generic/LaurentMPoly.jl

@@ -146,7 +146,7 @@ end
 ###############################################################################
 
 function ==(a::LaurentMPolyWrap, b::LaurentMPolyWrap)
-    check_parent(a, b, false) || return false
+    check_parent(a, b)
     if a.mindegs == b.mindegs
         return a.mpoly == b.mpoly
     end