Add type_depth_limit to CthulhuConfig

Add helper

Use depth-limited type printing

TypedSyntax/src/show.jl

@@ -32,7 +32,9 @@ end
 function Base.printstyled(io::IO, rootnode::MaybeTypedSyntaxNode;
                           type_annotations::Bool=true, iswarn::Bool=true, hide_type_stable::Bool=true,
                           with_linenumber::Bool=true,
-                          idxend = last_byte(rootnode))
+                          idxend = last_byte(rootnode),
+                          maxtypedepth = 2
+                          )
     rt = gettyp(rootnode)
     nd = with_linenumber ? ndigits_linenumbers(rootnode, idxend) : 0
     rootnode = get_function_def(rootnode)
@@ -43,11 +45,11 @@ function Base.printstyled(io::IO, rootnode::MaybeTypedSyntaxNode;
         @assert length(children(rootnode)) == 2
         sig, body = children(rootnode)
         type_annotate, pre, pre2, post = type_annotation_mode(sig, rt; type_annotations, hide_type_stable)
-        position = show_src_expr(io, sig, position, pre, pre2; type_annotations, iswarn, hide_type_stable, nd)
-        type_annotate && show_annotation(io, rt, post, rootnode.source, position; iswarn)
+        position = show_src_expr(io, sig, position, pre, pre2; type_annotations, iswarn, hide_type_stable, nd, maxtypedepth)
+        type_annotate && show_annotation(io, rt, post, rootnode.source, position; iswarn, maxtypedepth)
         rootnode = body
     end
-    position = show_src_expr(io, rootnode, position, "", ""; type_annotations, iswarn, hide_type_stable, nd)
+    position = show_src_expr(io, rootnode, position, "", ""; type_annotations, iswarn, hide_type_stable, nd, maxtypedepth)
     catchup(io, rootnode, position, nd, idxend+1)   # finish the node
     return nothing
 end
@@ -63,7 +65,7 @@ function _print(io::IO, x, node, position)
     end
 end
 
-function show_src_expr(io::IO, node::MaybeTypedSyntaxNode, position::Int, pre::String, pre2::String; type_annotations::Bool=true, iswarn::Bool=false, hide_type_stable::Bool=false, nd::Int)
+function show_src_expr(io::IO, node::MaybeTypedSyntaxNode, position::Int, pre::String, pre2::String; type_annotations::Bool=true, iswarn::Bool=false, hide_type_stable::Bool=false, nd::Int, maxtypedepth)
     _lastidx = last_byte(node)
     position = catchup(io, node, position, nd)
     if haschildren(node)
@@ -77,8 +79,8 @@ function show_src_expr(io::IO, node::MaybeTypedSyntaxNode, position::Int, pre::S
         i == 2 && _print(io, pre2, node.source, position)
         cT = gettyp(child)
         ctype_annotate, cpre, cpre2, cpost = type_annotation_mode(child, cT; type_annotations, hide_type_stable)
-        position = show_src_expr(io, child, position, cpre, cpre2; type_annotations, iswarn, hide_type_stable, nd)
-        ctype_annotate && show_annotation(io, cT, cpost, node.source, position; iswarn)
+        position = show_src_expr(io, child, position, cpre, cpre2; type_annotations, iswarn, hide_type_stable, nd, maxtypedepth)
+        ctype_annotate && show_annotation(io, cT, cpost, node.source, position; iswarn, maxtypedepth)
     end
     return Int(catchup(io, node, position, nd, _lastidx+1))
 end
@@ -113,12 +115,25 @@ function type_annotation_mode(node, @nospecialize(T); type_annotations::Bool, hi
     return type_annotate, pre, pre2, post
 end
 
-function show_annotation(io, @nospecialize(T), post, node, position; iswarn::Bool)
+function type_depth_limit(io::IO, s::String; maxtypedepth::Union{Nothing,Int})
+    sz = get(io, :displaysize, displaysize(io))::Tuple{Int, Int}
+    return Base.type_depth_limit(s, max(sz[2], 120); maxdepth=maxtypedepth)
+end
+
+type_depth_limit(::T; maxtypedepth) where {T} = type_depth_limit(T; maxtypedepth)
+
+function type_depth_limit(::Type{T}; maxtypedepth) where {T}
+    buf = IOBuffer()
+    io = IOContext(buf, :limit => true)
+    type_depth_limit(io, string(T); maxtypedepth)
+end
+
+function show_annotation(io, @nospecialize(T), post, node, position; iswarn::Bool, maxtypedepth)
     diagnostics = get(io, :diagnostics, nothing)
     inlay_hints = get(io, :inlay_hints, nothing)
 
     print(io, post)
-    T_str = string(T)
+    T_str = type_depth_limit(T; maxtypedepth)
     if iswarn && is_type_unstable(T)
         color = is_small_union_or_tunion(T) ? :yellow : :red
         printstyled(io, "::", T_str; color)

src/Cthulhu.jl

@@ -47,6 +47,7 @@ Base.@kwdef mutable struct CthulhuConfig
     inlay_types_vscode::Bool = true
     diagnostics_vscode::Bool = true
     jump_always::Bool = false
+    type_depth_limit::Union{Nothing, Int} = 2
 end
 
 """
@@ -411,6 +412,7 @@ function _descend(term::AbstractTerminal, interp::AbstractInterpreter, curs::Abs
     inlay_types_vscode::Bool              = CONFIG.inlay_types_vscode,            # default is true
     diagnostics_vscode::Bool              = CONFIG.diagnostics_vscode,            # default is true
     jump_always::Bool                     = CONFIG.jump_always,                   # default is false
+    type_depth_limit::Union{Nothing, Int} = CONFIG.type_depth_limit,              # default is 2
     )
 
     if isnothing(hide_type_stable)
@@ -651,7 +653,7 @@ function _descend(term::AbstractTerminal, interp::AbstractInterpreter, curs::Abs
                      remarks, with_effects, exception_type, inline_cost,
                      type_annotations, annotate_source,
                      inlay_types_vscode, diagnostics_vscode,
-                     jump_always)
+                     jump_always, type_depth_limit)
 
         elseif toggle === :warn
             iswarn ⊻= true

src/codeview.jl

@@ -119,6 +119,7 @@ function cthulhu_typed(io::IO, debuginfo::Symbol,
     lineprinter = __debuginfo[debuginfo]
     rettype = ignorelimited(rt)
     lambda_io = IOContext(io, :limit=>true)
+    maxtypedepth = CONFIG.type_depth_limit
 
     if annotate_source && isa(src, CodeInfo)
         tsn, _ = get_typed_sourcetext(mi, src, rt)
@@ -147,9 +148,9 @@ function cthulhu_typed(io::IO, debuginfo::Symbol,
             )
 
             if istruncated
-                printstyled(lambda_io, tsn; type_annotations, iswarn, hide_type_stable, idxend)
+                printstyled(lambda_io, tsn; type_annotations, iswarn, hide_type_stable, idxend, maxtypedepth)
             else
-                printstyled(vscode_io, tsn; type_annotations, iswarn, hide_type_stable, idxend)
+                printstyled(vscode_io, tsn; type_annotations, iswarn, hide_type_stable, idxend, maxtypedepth)
             end
 
             callsite_diagnostics = TypedSyntax.Diagnostic[]
@@ -186,6 +187,7 @@ function cthulhu_typed(io::IO, debuginfo::Symbol,
             show_variables(io, src, slotnames)
         end
     end
+    maxtypedepth = CONFIG.type_depth_limit
 
     # preprinter configuration
     preprinter = if src isa IRCode && inline_cost
@@ -215,7 +217,7 @@ function cthulhu_typed(io::IO, debuginfo::Symbol,
                   idx == -1 ? lpad(total_cost, nd+1) :
                   " "^(nd+1)
             str = sprint(; context=:color=>true) do @nospecialize io
-                printstyled(io, str; color=:green)
+                printstyled(io, str; color=:green, maxtypedepth)
             end
             if debuginfo === :source
                 str *= " "
@@ -263,7 +265,7 @@ function cthulhu_typed(io::IO, debuginfo::Symbol,
         function (io::IO; idx::Int, @nospecialize(kws...))
             _postprinter(io; idx, kws...)
             for i = searchsorted(pc2remarks, idx=>"", by=((idx,msg),)->idx)
-                printstyled(io, ' ', pc2remarks[i].second; color=:light_black)
+                printstyled(io, ' ', pc2remarks[i].second; color=:light_black, maxtypedepth)
             end
         end
     else
@@ -301,8 +303,9 @@ function descend_into_callsite!(io::IO, tsn::TypedSyntaxNode;
     # We empty the body when filling kwargs
     istruncated = isempty(children(body))
     idxend = istruncated ? JuliaSyntax.last_byte(sig) : lastindex(tsn.source)
+    maxtypedepth = CONFIG.type_depth_limit
     if !istruncated # If method only fills in default arguments
-        printstyled(io, tsn; type_annotations, iswarn, hide_type_stable, idxend)
+        printstyled(io, tsn; type_annotations, iswarn, hide_type_stable, idxend, maxtypedepth)
     end
 end
 

test/test_depth_limited_type_printing.jl

@@ -0,0 +1,22 @@
+#=
+using Revise; include(joinpath("test", "test_depth_limited_type_printing.jl"))
+=#
+import Cthulhu
+
+Base.@kwdef struct Nested{A,B}
+    num::Int = 1
+end
+struct F49231{a,b,c,d,e,f,g}
+    num::g
+end;
+bar(x) = rand() > 0.5 ? x : Any[0][1]
+mysum(x) = sum(y-> bar(x.num), 1:5; init=0)
+nest_val(na, nb, ::Val{1}) = Nested{na, nb}()
+nest_val(na, nb, ::Val{n}) where {n} = nest_val(Nested{na, nb}, Nested{na, nb}, Val(n-1))
+nest_val(na, nb, n::Int) = nest_val(na, nb, Val(n))
+nest_val(n) = nest_val(1, 1, n)
+
+f = nest_val(5)
+a = Any[f];
+mysum(a[1]) # make sure it runs
+Cthulhu.@descend mysum(a[1]) # navigate to sum -> sum, and F49231 will be there