Merge pull request #1255 from hersle/latexify_suppress_identity

Suppress identity transformation in Latexified expressions
JuliaSymbolics · Sep 2, 2024 · b75c55c · b75c55c
2 parents fd56b13 + 2759c1b
commit b75c55c
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diff --git a/src/latexify_recipes.jl b/src/latexify_recipes.jl
@@ -230,6 +230,8 @@ function _toexpr(O)
         return :(solve($(_toexpr(args[1])), $(_toexpr(args[2]))))
     elseif issym(op) && symtype(op) <: AbstractArray
         return :(_textbf($(nameof(op))))
+    elseif op === identity
+        return _toexpr(only(args)) # suppress identity transformations (e.g. "identity(π)" -> "π")
     end
     return Expr(:call, Symbol(op), _toexpr(args)...)
 end

diff --git a/test/latexify.jl b/test/latexify.jl
@@ -57,3 +57,5 @@ Dy = Differential(y)
 
 @test_reference "latexify_refs/indices1.txt" latexify(h[10,10])
 @test_reference "latexify_refs/indices2.txt" latexify(h[10,10], index=:bracket)
+
+@test !occursin("identity", latexify(Num(π))) # issue #1254
Original file line number	Diff line number	Diff line change
Expand Up		@@ -57,3 +57,5 @@ Dy = Differential(y)

		@test_reference "latexify_refs/indices1.txt" latexify(h[10,10])
		@test_reference "latexify_refs/indices2.txt" latexify(h[10,10], index=:bracket)

		@test !occursin("identity", latexify(Num(π))) # issue #1254