Merge pull request #136 from JuliaDebug/teh/misc

Docstring and dangling API update issue

Author: timholy

docs/src/dev_reference.md

@@ -1,6 +1,6 @@
 # Function reference
 
-## Top-level
+## Running the interpreter
 
 ```@docs
 @interpret
@@ -93,4 +93,5 @@ JuliaInterpreter.linenumber
 JuliaInterpreter.statementnumber
 JuliaInterpreter.Variable
 JuliaInterpreter.locals
+JuliaInterpreter.whichtt
 ```

src/interpret.jl

@@ -10,7 +10,7 @@ lookup_var(frame, ref::GlobalRef) = getfield(ref.mod, ref.name)
 function lookup_var(frame, slot::SlotNumber)
     val = frame.framedata.locals[slot.id]
     val !== nothing && return val.value
-    error("slot ", slot, " with name ", frame.framecode.code.slotnames[slot.id], " not assigned")
+    error("slot ", slot, " with name ", frame.framecode.src.slotnames[slot.id], " not assigned")
 end
 
 function lookup_expr(frame, e::Expr)

src/utils.jl

@@ -25,6 +25,11 @@ function to_function(@nospecialize(x))
     isa(x, GlobalRef) ? getfield(x.mod, x.name) : x
 end
 
+"""
+    method = whichtt(tt)
+
+Like `which` except it operates on the complete tuple-type `tt`.
+"""
 function whichtt(@nospecialize(tt))
     m = ccall(:jl_gf_invoke_lookup, Any, (Any, UInt), tt, typemax(UInt))
     m === nothing && return nothing

test/interpret.jl

@@ -334,6 +334,8 @@ f113(;x) = x
         return x
     end
     frame = JuliaInterpreter.enter_call(f_multi, 1)
+    nlocals = length(frame.framedata.locals)
+    @test_throws ErrorException("slot _4 with name x not assigned") JuliaInterpreter.lookup_var(frame, Core.SlotNumber(nlocals))
     stack = [frame]
     locals = JuliaInterpreter.locals(frame)
     @test length(locals) == 2