Protect method definitions inside header guard

Author: MilesCranmer

test/test_params.jl

@@ -1,30 +1,35 @@
 using DynamicExpressions
 
 maximum_residual = 1e-2
-safe_log(x::T) where {T} = (x <= 0) ? T(NaN) : log(x)
-safe_log2(x::T) where {T} = (x <= 0) ? T(NaN) : log2(x)
-safe_log10(x::T) where {T} = (x <= 0) ? T(NaN) : log10(x)
-safe_log1p(x::T) where {T} = (x <= -1) ? T(NaN) : log1p(x)
-safe_sqrt(x::T) where {T} = (x < 0) ? T(NaN) : sqrt(x)
-safe_pow(x::T, y::T) where {T} = (x < 0 && y != round(y)) ? T(NaN) : x^y
-relu(x::T) where {T} = (x < 0) ? zero(T) : x
-safe_acosh(x::T) where {T} = (x < 1) ? T(NaN) : acosh(x)
-sub(x::T, y::T) where {T} = x - y
-greater(x::T, y::T) where {T} = (x > y) ? one(T) : zero(T)
 
-safe_log(x) = log(x)
-safe_log2(x) = log2(x)
-safe_log10(x) = log10(x)
-safe_log1p(x) = log1p(x)
-safe_sqrt(x) = sqrt(x)
-safe_pow(x, y) = x^y
-relu(x) = max(x, 0)
-safe_acosh(x) = acosh(x)
-sub(x, y) = x - y
-square(x) = x * x
-cube(x) = x * x * x
-greater(x, y) = (x > y)
+(@isdefined HEADER_GUARD_TEST_PARAMS) || @eval begin
+    safe_log(x::T) where {T<:Number} = (x <= 0) ? T(NaN) : log(x)
+    safe_log2(x::T) where {T<:Number} = (x <= 0) ? T(NaN) : log2(x)
+    safe_log10(x::T) where {T<:Number} = (x <= 0) ? T(NaN) : log10(x)
+    safe_log1p(x::T) where {T<:Number} = (x <= -1) ? T(NaN) : log1p(x)
+    safe_sqrt(x::T) where {T<:Number} = (x < 0) ? T(NaN) : sqrt(x)
+    safe_pow(x::T, y::T) where {T<:Number} = (x < 0 && y != round(y)) ? T(NaN) : x^y
+    relu(x::T) where {T<:Number} = (x < 0) ? zero(T) : x
+    safe_acosh(x::T) where {T<:Number} = (x < 1) ? T(NaN) : acosh(x)
+    sub(x::T, y::T) where {T<:Number} = x - y
+    greater(x::T, y::T) where {T<:Number} = (x > y) ? one(T) : zero(T)
 
-custom_cos(x) = cos(x)
+    safe_log(x) = log(x)
+    safe_log2(x) = log2(x)
+    safe_log10(x) = log10(x)
+    safe_log1p(x) = log1p(x)
+    safe_sqrt(x) = sqrt(x)
+    safe_pow(x, y) = x^y
+    relu(x) = max(x, 0)
+    safe_acosh(x) = acosh(x)
+    sub(x, y) = x - y
+    square(x) = x * x
+    cube(x) = x * x * x
+    greater(x, y) = (x > y)
+
+    custom_cos(x) = cos(x)
+end
+
+HEADER_GUARD_TEST_PARAMS = true
 
 default_params = (binary_operators=(/, +, *), unary_operators=(exp, custom_cos))