nimbus-eth2/tests/helpers/debug_state.nim

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# beacon_chain
# Copyright (c) 2018-2021 Status Research & Development GmbH
# Licensed and distributed under either of
# * MIT license (license terms in the root directory or at https://opensource.org/licenses/MIT).
# * Apache v2 license (license terms in the root directory or at https://www.apache.org/licenses/LICENSE-2.0).
# at your option. This file may not be copied, modified, or distributed except according to those terms.
import
macros,
ssz_serialization/types,
../../beacon_chain/spec/datatypes/base
# digest is necessary for them to be printed as hex
export base.`==`
# ---------------------------------------------------------------------
# This tool inspects and compare 2 instances of a type recursively
# highlighting the differences
const builtinTypes = [
"int", "int8", "int16", "int32", "int64",
"uint", "uint8", "uint16", "uint32", "uint64",
"byte", "float32", "float64",
# "array", "seq", # wrapped in nnkBracketExpr
"char", "string"
]
proc compareStmt(xSubField, ySubField: NimNode, stmts: var NimNode) =
let xStr = $xSubField.toStrLit
let yStr = $ySubField.toStrLit
let isEqual = bindSym("==") # Bind all expose equality, in particular for BlsValue
stmts.add quote do:
doAssert(
`isEqual`(`xSubField`, `ySubField`),
"\nDiff: " & `xStr` & " = " & $`xSubField` & "\n" &
"and " & `yStr` & " = " & $`ySubField` & "\n"
)
proc compareContainerStmt(xSubField, ySubField: NimNode, stmts: var NimNode) =
let xStr = $xSubField.toStrLit
let yStr = $ySubField.toStrLit
let isEqual = bindSym("==") # Bind all expose equality, in particular for BlsValue
stmts.add quote do:
doAssert(
`isEqual`(`xSubField`.len, `ySubField`.len),
"\nDiff: " & `xStr` & ".len = " & $`xSubField`.len & "\n" &
"and " & `yStr` & ".len = " & $`ySubField`.len & "\n"
)
for idx in `xSubField`.low .. `xSubField`.high:
doAssert(
`isEqual`(`xSubField`[idx], `ySubField`[idx]),
"\nDiff: " & `xStr` & "[" & $idx & "] = " & $`xSubField`[idx] & "\n" &
"and " & `yStr` & "[" & $idx & "] = " & $`ySubField`[idx] & "\n"
)
func inspectType(tImpl, xSubField, ySubField: NimNode, stmts: var NimNode) =
# echo "kind: " & $tImpl.kind
# echo " -- field: " & $xSubField.toStrLit
case tImpl.kind
of nnkObjectTy:
# pass the records
let records = tImpl[2]
records.expectKind(nnkRecList)
for decl in records:
inspectType(
decl[1], # field type
nnkDotExpr.newTree(xSubField, decl[0]), # Accessor
nnkDotExpr.newTree(ySubField, decl[0]),
stmts
)
of {nnkRefTy, nnkDistinctTy}:
inspectType(tImpl[0], xSubField, ySubField, stmts)
of {nnkSym, nnkBracketExpr}:
if tImpl.kind == nnkBracketExpr:
# doAssert tImpl[0].eqIdent"List" or tImpl[0].eqIdent"seq" or tImpl[0].eqIdent"array", "Error: unsupported generic type: " & $tImpl[0]
compareContainerStmt(xSubField, ySubField, stmts)
elif $tImpl in builtinTypes:
compareStmt(xSubField, ySubField, stmts)
elif $tImpl in ["ValidatorSig", "ValidatorPubKey"]:
# Workaround BlsValue being a case object
compareStmt(xSubField, ySubField, stmts)
else:
inspectType(tImpl.getTypeImpl(), xSubField, ySubField, stmts)
else:
error "Unsupported kind: " & $tImpl.kind &
" for field \"" & $xSubField.toStrLit &
"\" of type \"" & tImpl.repr
macro reportDiff*(x, y: typed): untyped =
doAssert sameType(x, y)
result = newStmtList()
let typeImpl = x.getTypeImpl
inspectType(typeImpl, x, y, result)
# echo result.toStrLit
# -----------------------------------------