diff --git a/src/Bridges/Constraint/bridges/all_different_reif.jl b/src/Bridges/Constraint/bridges/all_different_reif.jl
index 9c4b64d567..fa1848f714 100644
--- a/src/Bridges/Constraint/bridges/all_different_reif.jl
+++ b/src/Bridges/Constraint/bridges/all_different_reif.jl
@@ -195,7 +195,7 @@ function MOI.get(
     bridge::ReifiedAllDifferentToCountDistinctBridge{T},
     ::MOI.ListOfConstraintIndices{MOI.VariableIndex,MOI.EqualTo{T}},
 ) where {T}
-    F, S = MOI.VariableIndex,MOI.EqualTo{T}
+    F, S = MOI.VariableIndex, MOI.EqualTo{T}
     ret = MOI.ConstraintIndex{F,S}[]
     if bridge.y === nothing
         push!(ret, MOI.ConstraintIndex{F,S}(something(bridge.y).value))
diff --git a/src/FileFormats/MOF/read.jl b/src/FileFormats/MOF/read.jl
index 000b37751f..78df5254df 100644
--- a/src/FileFormats/MOF/read.jl
+++ b/src/FileFormats/MOF/read.jl
@@ -297,9 +297,11 @@ function function_to_moi(
     object::Object,
     name_map::Dict{String,MOI.VariableIndex},
 )
-    return MOI.VectorOfVariables(MOI.VariableIndex[
-        name_map[variable] for variable::String in object["variables"]
-    ])
+    return MOI.VectorOfVariables(
+        MOI.VariableIndex[
+            name_map[variable] for variable::String in object["variables"]
+        ],
+    )
 end
 
 # ========== Typed vector functions ==========
diff --git a/src/Nonlinear/evaluator.jl b/src/Nonlinear/evaluator.jl
index 2414ac7db1..c8cdc491cf 100644
--- a/src/Nonlinear/evaluator.jl
+++ b/src/Nonlinear/evaluator.jl
@@ -102,15 +102,16 @@ function MOI.constraint_expr(evaluator::Evaluator, i::Int)
         constraint.expression;
         moi_output_format = true,
     )
-    if constraint.set isa MOI.LessThan
-        return :($f <= $(constraint.set.upper))
-    elseif constraint.set isa MOI.GreaterThan
-        return :($f >= $(constraint.set.lower))
-    elseif constraint.set isa MOI.EqualTo
-        return :($f == $(constraint.set.value))
+    set = constraint.set
+    if set isa MOI.LessThan
+        return :($f <= $(set.upper))
+    elseif set isa MOI.GreaterThan
+        return :($f >= $(set.lower))
+    elseif set isa MOI.EqualTo
+        return :($f == $(set.value))
     else
-        @assert constraint.set isa MOI.Interval
-        return :($(constraint.set.lower) <= $f <= $(constraint.set.upper))
+        @assert set isa MOI.Interval
+        return :($(set.lower) <= $f <= $(set.upper))
     end
 end
 
diff --git a/src/Utilities/objective_container.jl b/src/Utilities/objective_container.jl
index 78d397bc5e..d8fd4db793 100644
--- a/src/Utilities/objective_container.jl
+++ b/src/Utilities/objective_container.jl
@@ -130,7 +130,7 @@ function MOI.get(
         MOI.VectorAffineFunction{T},
         MOI.VectorQuadraticFunction{T},
         MOI.VectorNonlinearFunction,
-    }
+    },
 }
     if o.scalar_affine !== nothing
         return convert(F, something(o.scalar_affine))
diff --git a/src/Utilities/parser.jl b/src/Utilities/parser.jl
index 01e942cd8d..8b030be9ce 100644
--- a/src/Utilities/parser.jl
+++ b/src/Utilities/parser.jl
@@ -60,10 +60,10 @@ function _parse_function(ex, ::Type{T} = Float64) where {T}
     if isa(ex, Symbol)
         return _ParsedVariableIndex(ex)
     elseif Meta.isexpr(ex, :vect)
-        if all(s -> isa(s, Symbol), ex.args)
+        if all(Base.Fix2(isa, Symbol), ex.args)
             return _ParsedVectorOfVariables(copy(ex.args))
         else
-            singlefunctions = _parse_function.(ex.args, T)
+            singlefunctions = map(Base.Fix2(_parse_function, T), ex.args)
             affine_terms = _ParsedVectorAffineTerm{T}[]
             quadratic_terms = _ParsedVectorQuadraticTerm{T}[]
             constant = T[]
diff --git a/src/Utilities/print.jl b/src/Utilities/print.jl
index 41d3e747bc..0c282d17eb 100644
--- a/src/Utilities/print.jl
+++ b/src/Utilities/print.jl
@@ -113,10 +113,10 @@ function _to_string(
     var_name = replace(var_name, "^" => "\\^")
     # Convert any x[args] to x_{args} so that indices on x print as subscripts.
     m = match(r"^(.*)\[(.+)\]$", var_name)
-    if m !== nothing
-        var_name = m[1] * "_{" * m[2] * "}"
+    if m === nothing
+        return var_name
     end
-    return var_name
+    return string(m[1]::AbstractString, "_{", m[2]::AbstractString, "}")
 end
 
 function _shorten(options::_PrintOptions, x::Float64)
diff --git a/src/Utilities/product_of_sets.jl b/src/Utilities/product_of_sets.jl
index cc2973e82d..cc7ac78512 100644
--- a/src/Utilities/product_of_sets.jl
+++ b/src/Utilities/product_of_sets.jl
@@ -219,7 +219,7 @@ function rows(
     ci::MOI.ConstraintIndex{MOI.ScalarAffineFunction{T},S},
 ) where {T,S}
     @assert sets.final_touch
-    i = set_index(sets, S)
+    i = set_index(sets, S)::Int
     return (i == 1 ? 0 : sets.num_rows[i-1]) + ci.value
 end
 
@@ -228,7 +228,7 @@ function rows(
     ci::MOI.ConstraintIndex{MOI.VectorAffineFunction{T},S},
 ) where {T,S}
     @assert sets.final_touch
-    i = set_index(sets, S)
+    i = set_index(sets, S)::Int
     offset = i == 1 ? 0 : sets.num_rows[i-1]
     return (offset + ci.value - 1) .+ (1:sets.dimension[(i, ci.value)])
 end
@@ -263,7 +263,7 @@ Return the number of rows corresponding to a set of type `S`. That is, it is
 the sum of the dimensions of the sets of type `S`.
 """
 function num_rows(sets::OrderedProductOfSets, ::Type{S}) where {S}
-    i = set_index(sets, S)
+    i = set_index(sets, S)::Int
     if !sets.final_touch || i == 1
         return sets.num_rows[i]
     end
diff --git a/src/Utilities/vector_of_constraints.jl b/src/Utilities/vector_of_constraints.jl
index 886447edd5..6033121118 100644
--- a/src/Utilities/vector_of_constraints.jl
+++ b/src/Utilities/vector_of_constraints.jl
@@ -102,7 +102,8 @@ function MOI.get(
     ci::MOI.ConstraintIndex{F,S},
 ) where {F,S}
     MOI.throw_if_not_valid(v, ci)
-    return v.constraints[ci][1]
+    f, _ = v.constraints[ci]::Tuple{F,S}
+    return f
 end
 
 function MOI.get(
@@ -111,7 +112,8 @@ function MOI.get(
     ci::MOI.ConstraintIndex{F,S},
 ) where {F,S}
     MOI.throw_if_not_valid(v, ci)
-    return v.constraints[ci][2]
+    _, s = v.constraints[ci]::Tuple{F,S}
+    return s
 end
 
 function MOI.set(
@@ -121,7 +123,8 @@ function MOI.set(
     func::F,
 ) where {F,S}
     MOI.throw_if_not_valid(v, ci)
-    v.constraints[ci] = (func, v.constraints[ci][2])
+    _, s = v.constraints[ci]::Tuple{F,S}
+    v.constraints[ci] = (func, s)
     return
 end
 
@@ -132,7 +135,8 @@ function MOI.set(
     set::S,
 ) where {F,S}
     MOI.throw_if_not_valid(v, ci)
-    v.constraints[ci] = (v.constraints[ci][1], set)
+    f, _ = v.constraints[ci]::Tuple{F,S}
+    v.constraints[ci] = (f, set)
     return
 end
 
@@ -162,7 +166,7 @@ function MOI.modify(
     ci::MOI.ConstraintIndex{F,S},
     change::MOI.AbstractFunctionModification,
 ) where {F,S}
-    func, set = v.constraints[ci]
+    func, set = v.constraints[ci]::Tuple{F,S}
     v.constraints[ci] = (modify_function!(func, change), set)
     return
 end