first step to get rid of nil in the AST

1 files changed, 241 insertions, 150 deletions

diff --git a/rod/msgs.nim b/rod/msgs.nim
index 9e826e127..a3e9c1211 100755
--- a/rod/msgs.nim
+++ b/rod/msgs.nim
@@ -62,7 +62,7 @@ type
     errImplOfXexpected, errNoSymbolToBorrowFromFound, errDiscardValue, 
     errInvalidDiscard, errIllegalConvFromXtoY, errCannotBindXTwice, 
     errInvalidOrderInArrayConstructor,
-    errInvalidOrderInEnumX, errEnumXHasWholes, errExceptExpected, errInvalidTry, 
+    errInvalidOrderInEnumX, errEnumXHasHoles, errExceptExpected, errInvalidTry, 
     errOptionExpected, errXisNoLabel, errNotAllCasesCovered, 
     errUnkownSubstitionVar, errComplexStmtRequiresInd, errXisNotCallable, 
     errNoPragmasAllowedForX, errNoGenericParamsAllowedForX, 
@@ -96,154 +96,245 @@ type
     hintProcessing, hintCodeBegin, hintCodeEnd, hintConf, hintPath, hintUser
 
 const 
-  MsgKindToStr*: array[TMsgKind, string] = ["unknown error", 
-    "illformed AST: $1", "cannot open \'$1\'", "internal error: $1", "$1", 
-    "\'$1\' compiler does not support C++", "string literal expected", 
-    "integer literal expected", "invalid character constant", 
-    "closing \"\"\" expected, but end of file reached", "closing \" expected", 
-    "tabulators are not allowed", "invalid token: $1", "line too long", 
-    "$1 is not a valid number", "number $1 out of valid range", 
-    "\\n not allowed in character literal", 
-    "closing \']\' expected, but end of file reached", "missing final \'", 
-    "identifier expected, but found \'$1\'", 
-    "operator expected, but found \'$1\'", "\'$1\' expected", 
-    "string after \'include\' expected", "recursive dependency: \'$1\'", 
-    "\'on\' or \'off\' expected", "\'none\', \'speed\' or \'size\' expected", 
-    "invalid pragma", "unknown pragma: \'$1\'", "invalid directive: \'$1\'", 
-    "\'pop\' without a \'push\' pragma", "empty asm statement", 
-    "invalid indentation", "exception expected", "exception already handled", 
-    "\'yield\' only allowed in a loop of an iterator", 
-    "invalid number of \'yield\' expresions", 
-    "current routine cannot return an expression", "attempt to redefine \'$1\'", 
-    "statement not allowed after \'return\', \'break\' or \'raise\'", 
-    "statement expected", "\'$1\' is no label", 
-    "invalid command line option: \'$1\'", 
-    "argument for command line option expected: \'$1\'", 
-    "invalid argument for command line option: \'$1\'", 
-    "invalid variable substitution in \'$1\'", "unknown variable: \'$1\'", 
-    "unknown C compiler: \'$1\'", 
-    "\'on\' or \'off\' expected, but \'$1\' found", 
-    "\'none\', \'boehm\' or \'refc\' expected, but \'$1\' found", 
-    "\'none\', \'speed\' or \'size\' expected, but \'$1\' found", 
-    "\'gui\', \'console\' or \'lib\' expected, but \'$1\' found", 
-    "unknown OS: \'$1\'", "unknown CPU: \'$1\'", 
-    "\'c\', \'c++\' or \'yaml\' expected, but \'$1\' found", 
-    "arguments can only be given if the \'--run\' option is selected", 
-    "multiple assignment is not allowed", 
-    "\':\' or \'=\' expected, but found \'$1\'", 
-    "expression expected, but found \'$1\'", "undeclared identifier: \'$1\'", 
-    "ambiguous identifier: \'$1\' -- use a qualifier", "type expected", 
-    "system module needs \'$1\'", "execution of an external program failed", 
-    "overloaded \'$1\' leads to ambiguous calls", "invalid argument for \'$1\'", 
-    "statement has no effect", "\'$1\' expects a type or value", 
-    "\'$1\' expects an array type", 
-    "\'$1\' cannot be instantiated because its body has not been compiled yet", 
-    "expression \'$1\' ambiguous in this context", "constant division by zero", 
-    "ordinal type expected", "ordinal or float type expected", 
-    "over- or underflow", 
-    "cannot evalutate \'$1\' because type is not defined completely", 
-    "\'chr\' expects an int in the range 0..255", 
-    "\'dynlib\' requires \'exportc\'", "undeclared field: \'$1\'", 
-    "attempt to access a nil address", "index out of bounds", 
-    "index types do not match", "\'[]\' operator invalid for this type", 
-    "value out of set bounds", "field initialized twice: \'$1\'", 
-    "field \'$1\' not initialized", "expression \'$1\' cannot be called", 
-    "expression has no type", "expression \'$1\' has no type (or is ambiguous)", 
-    "\'cast\' not allowed in safe mode", "expression cannot be casted to $1", 
-    "\',\' or \')\' expected", "\'{\' or \'(\' expected", 
-    "section (\'type\', \'proc\', etc.) expected", "range expected", 
-    "attempt to redefine \'$1\'", "\'magic\' only allowed in system module", 
-    "power of two expected", "string literal may not be empty", 
-    "calling convention expected", 
-    "a proc can only have one calling convention", 
-    "symbol must be imported if \'lib\' pragma is used", 
-    "expression must be of type \'bool\'", "constant expression expected", 
-    "duplicate case label", "range is empty", 
-    "selector must be of an ordinal type, real or string", 
-    "selector must be of an ordinal type", "ord($1) must not be negative", 
-    "len($1) must be less than 32768", "wrong number of variables", 
-    "only objects can be raised", "\'break\' only allowed in loop construct", 
-    "type \'$1\' has unknown size", 
-    "a constant can only be initialized with a constant expression", 
-    "a constant needs a value", "the result type cannot be on open array", 
-    "computing the type\'s size produced an overflow", "set is too large", 
-    "base type of a set must be an ordinal", 
-    "inheritance only works with non-final objects", 
-    "inheritance only works with an enum", "illegal recursion in type \'$1\'", 
-    "cannot instantiate: \'$1\'", "expression has no address", 
-    "for a \'var\' type a variable needs to be passed", "type mismatch", 
-    "type mismatch: got (", "but expected one of: ", "but expected \'$1\'", 
-    "ambiguous call; both $1 and $2 match for: $3", "wrong number of arguments", 
-    "\'$1\' cannot be passed to a procvar", 
-    "$1 cannot be declared in parameter declaration", 
-    "pragmas are only in the header of a proc allowed", 
-    "implementation of \'$1\' is not allowed", 
-    "implementation of \'$1\' expected", "no symbol to borrow from found", 
-    "value returned by statement has to be discarded", 
-    "statement returns no value that can be discarded", 
-    "conversion from $1 to $2 is invalid", "cannot bind parameter \'$1\' twice", 
-    "invalid order in array constructor",
-    "invalid order in enum \'$1\'", "enum \'$1\' has wholes", 
-    "\'except\' or \'finally\' expected", 
-    "after catch all \'except\' or \'finally\' no section may follow", 
-    "option expected, but found \'$1\'", "\'$1\' is not a label", 
-    "not all cases are covered", "unknown substitution variable: \'$1\'", 
-    "complex statement requires indentation", "\'$1\' is not callable", 
-    "no pragmas allowed for $1", "no generic parameters allowed for $1", 
-    "invalid param kind: \'$1\'", "default argument invalid", 
-    "named parameter has to be an identifier", "no return type for $1 allowed", 
-    "a type conversion needs exactly one argument", "invalid pragma: $1", 
-    "$1 not allowed here", "invalid control flow: $1", "a type has no value", 
-    "invalid type: \'$1\'", "\'^\' needs a pointer or reference type", 
-    "invalid expression", "invalid expression: \'$1\'", 
-    "enum has no value \'$1\'", "named expression expected", 
-    "named expression not allowed here", "\'$1\' expects one type parameter", 
-    "array expects two type parameters", "invalid visibility: \'$1\'", 
-    "initialization not allowed here", "\'$1\' cannot be assigned to", 
-    "iterators can only be defined at the module\'s top level", 
-    "$1 needs a return type", "invalid command: \'$1\'", 
-    "\'$1\' is only allowed at top level", 
-    "'$1' needs a parameter that has an object type",
-    "template/macro instantiation too nested", "instantiation from here", 
-    "invalid index value for tuple subscript", 
-    "command expects a filename argument", "\'$1\' expected", 
-    "invalid section start", "grid table is not implemented", 
-    "general parse error", "new section expected", 
-    "whitespace expected, got \'$1\'", "\'$1\' is no valid index file", 
-    "cannot render reStructuredText element \'$1\'", 
-    "type \'var var\' is not allowed", "\'is\' expects two arguments", 
-    "\'is\' expects object types", "\'$1\' can never be of this subtype", 
-    "interpretation requires too many iterations", 
-    "cannot interpret node kind \'$1\'", "field \'$1\' cannot be found", 
-    "invalid conversion from type \'$1\'", "assertion failed", 
-    "cannot generate code for \'$1\'", "$1 requires one parameter", 
-    "unhandled exception: $1", "macro returned a cyclic abstract syntax tree", 
-    "\'$1\' is no macro or template", "\'$1\' can have side effects", 
-    "iterator within for loop context expected", "$1", 
-    "cannot open \'$1\' [CannotOpenFile]", "octal escape sequences do not exist; leading zero is ignored [OctalEscape]", 
-    "\'$1\' is never read [XIsNeverRead]", 
-    "\'$1\' might not have been initialized [XmightNotBeenInit]", 
-    "cannot write file \'$1\' [CannotWriteMO2]", 
-    "cannot read file \'$1\' [CannotReadMO2]", 
-    "\'$1\' is deprecated [Deprecated]", "\'l\' should not be used as an identifier; may look like \'1\' (one) [SmallLshouldNotBeUsed]", 
-    "unknown magic \'$1\' might crash the compiler [UnknownMagic]", 
-    "redefinition of label \'$1\' [RedefinitionOfLabel]", 
-    "unknown substitution \'$1\' [UnknownSubstitutionX]", 
-    "language \'$1\' not supported [LanguageXNotSupported]", 
-    "comment \'$1\' ignored [CommentXIgnored]", 
-    "\'$1\' is passed to a procvar; deprecated [XisPassedToProcVar]", 
-    "$1 [User]", "operation successful [Success]", 
-    "operation successful ($1 lines compiled; $2 sec total) [SuccessX]", 
-    "line too long [LineTooLong]", 
-    "\'$1\' is declared but not used [XDeclaredButNotUsed]", 
-    "conversion to base object is not needed [ConvToBaseNotNeeded]", 
-    "conversion from $1 to itself is pointless [ConvFromXtoItselfNotNeeded]", 
-    "expression evaluates always to \'$1\' [ExprAlwaysX]", 
-    "quit() called [QuitCalled]", "$1 [Processing]", 
-    "generated code listing: [CodeBegin]", "end of listing [CodeEnd]", 
-    "used config file \'$1\' [Conf]", 
-    "added path: '$1' [Path]",
-    "$1 [User]"]
+  MsgKindToStr*: array[TMsgKind, string] = [
+    errUnknown: "unknown error", 
+    errIllFormedAstX: "illformed AST: $1",
+    errCannotOpenFile: "cannot open \'$1\'", 
+    errInternal: "internal error: $1", 
+    errGenerated: "$1", 
+    errXCompilerDoesNotSupportCpp: "\'$1\' compiler does not support C++", 
+    errStringLiteralExpected: "string literal expected", 
+    errIntLiteralExpected: "integer literal expected", 
+    errInvalidCharacterConstant: "invalid character constant", 
+    errClosingTripleQuoteExpected: "closing \"\"\" expected, but end of file reached", 
+    errClosingQuoteExpected: "closing \" expected", 
+    errTabulatorsAreNotAllowed: "tabulators are not allowed", 
+    errInvalidToken: "invalid token: $1", 
+    errLineTooLong: "line too long", 
+    errInvalidNumber: "$1 is not a valid number", 
+    errNumberOutOfRange: "number $1 out of valid range", 
+    errNnotAllowedInCharacter: "\\n not allowed in character literal", 
+    errClosingBracketExpected: "closing ']' expected, but end of file reached", 
+    errMissingFinalQuote: "missing final \'", 
+    errIdentifierExpected: "identifier expected, but found \'$1\'", 
+    errOperatorExpected: "operator expected, but found \'$1\'", 
+    errTokenExpected: "\'$1\' expected", 
+    errStringAfterIncludeExpected: "string after \'include\' expected", 
+    errRecursiveDependencyX: "recursive dependency: \'$1\'", 
+    errOnOrOffExpected: "\'on\' or \'off\' expected", 
+    errNoneSpeedOrSizeExpected: "\'none\', \'speed\' or \'size\' expected", 
+    errInvalidPragma: "invalid pragma", 
+    errUnknownPragma: "unknown pragma: \'$1\'", 
+    errInvalidDirectiveX: "invalid directive: \'$1\'", 
+    errAtPopWithoutPush: "\'pop\' without a \'push\' pragma", 
+    errEmptyAsm: "empty asm statement", 
+    errInvalidIndentation: "invalid indentation", 
+    errExceptionExpected: "exception expected", 
+    errExceptionAlreadyHandled: "exception already handled", 
+    errYieldNotAllowedHere: "\'yield\' only allowed in a loop of an iterator", 
+    errInvalidNumberOfYieldExpr: "invalid number of \'yield\' expresions", 
+    errCannotReturnExpr: "current routine cannot return an expression", 
+    errAttemptToRedefine: "attempt to redefine \'$1\'", 
+    errStmtInvalidAfterReturn: "statement not allowed after \'return\', \'break\' or \'raise\'", 
+    errStmtExpected: "statement expected", 
+    errInvalidLabel: "\'$1\' is no label", 
+    errInvalidCmdLineOption: "invalid command line option: \'$1\'", 
+    errCmdLineArgExpected: "argument for command line option expected: \'$1\'", 
+    errCmdLineNoArgExpected: "invalid argument for command line option: \'$1\'", 
+    errInvalidVarSubstitution: "invalid variable substitution in \'$1\'", 
+    errUnknownVar: "unknown variable: \'$1\'", 
+    errUnknownCcompiler: "unknown C compiler: \'$1\'", 
+    errOnOrOffExpectedButXFound: "\'on\' or \'off\' expected, but \'$1\' found", 
+    errNoneBoehmRefcExpectedButXFound: "'none', 'boehm' or 'refc' expected, but '$1' found", 
+    errNoneSpeedOrSizeExpectedButXFound: "'none', 'speed' or 'size' expected, but '$1' found", 
+    errGuiConsoleOrLibExpectedButXFound: "'gui', 'console' or 'lib' expected, but '$1' found", 
+    errUnknownOS: "unknown OS: '$1'", 
+    errUnknownCPU: "unknown CPU: '$1'", 
+    errGenOutExpectedButXFound: "'c', 'c++' or 'yaml' expected, but '$1' found", 
+    errArgsNeedRunOption: "arguments can only be given if the '--run' option is selected", 
+    errInvalidMultipleAsgn: "multiple assignment is not allowed", 
+    errColonOrEqualsExpected: "\':\' or \'=\' expected, but found \'$1\'", 
+    errExprExpected: "expression expected, but found \'$1\'", 
+    errUndeclaredIdentifier: "undeclared identifier: \'$1\'", 
+    errUseQualifier: "ambiguous identifier: \'$1\' -- use a qualifier", 
+    errTypeExpected: "type expected", 
+    errSystemNeeds: "system module needs \'$1\'", 
+    errExecutionOfProgramFailed: "execution of an external program failed", 
+    errNotOverloadable: "overloaded \'$1\' leads to ambiguous calls", 
+    errInvalidArgForX: "invalid argument for \'$1\'", 
+    errStmtHasNoEffect: "statement has no effect", 
+    errXExpectsTypeOrValue: "\'$1\' expects a type or value", 
+    errXExpectsArrayType: "\'$1\' expects an array type", 
+    errIteratorCannotBeInstantiated: "'$1' cannot be instantiated because its body has not been compiled yet", 
+    errExprXAmbiguous: "expression '$1' ambiguous in this context", 
+    errConstantDivisionByZero: "constant division by zero", 
+    errOrdinalTypeExpected: "ordinal type expected", 
+    errOrdinalOrFloatTypeExpected: "ordinal or float type expected", 
+    errOverOrUnderflow: "over- or underflow", 
+    errCannotEvalXBecauseIncompletelyDefined: "cannot evalutate '$1' because type is not defined completely", 
+    errChrExpectsRange0_255: "\'chr\' expects an int in the range 0..255", 
+    errDynlibRequiresExportc: "\'dynlib\' requires \'exportc\'", 
+    errUndeclaredFieldX: "undeclared field: \'$1\'", 
+    errNilAccess: "attempt to access a nil address",
+    errIndexOutOfBounds: "index out of bounds", 
+    errIndexTypesDoNotMatch: "index types do not match", 
+    errBracketsInvalidForType: "\'[]\' operator invalid for this type", 
+    errValueOutOfSetBounds: "value out of set bounds", 
+    errFieldInitTwice: "field initialized twice: \'$1\'", 
+    errFieldNotInit: "field \'$1\' not initialized", 
+    errExprXCannotBeCalled: "expression \'$1\' cannot be called", 
+    errExprHasNoType: "expression has no type", 
+    errExprXHasNoType: "expression \'$1\' has no type (or is ambiguous)", 
+    errCastNotInSafeMode: "\'cast\' not allowed in safe mode",
+    errExprCannotBeCastedToX: "expression cannot be casted to $1", 
+    errCommaOrParRiExpected: "',' or ')' expected", 
+    errCurlyLeOrParLeExpected: "\'{\' or \'(\' expected", 
+    errSectionExpected: "section (\'type\', \'proc\', etc.) expected", 
+    errRangeExpected: "range expected", 
+    errAttemptToRedefineX: "attempt to redefine \'$1\'", 
+    errMagicOnlyInSystem: "\'magic\' only allowed in system module", 
+    errPowerOfTwoExpected: "power of two expected",
+    errStringMayNotBeEmpty: "string literal may not be empty", 
+    errCallConvExpected: "calling convention expected", 
+    errProcOnlyOneCallConv: "a proc can only have one calling convention", 
+    errSymbolMustBeImported: "symbol must be imported if 'lib' pragma is used", 
+    errExprMustBeBool: "expression must be of type 'bool'", 
+    errConstExprExpected: "constant expression expected", 
+    errDuplicateCaseLabel: "duplicate case label", 
+    errRangeIsEmpty: "range is empty", 
+    errSelectorMustBeOfCertainTypes: "selector must be of an ordinal type, float or string", 
+    errSelectorMustBeOrdinal: "selector must be of an ordinal type", 
+    errOrdXMustNotBeNegative: "ord($1) must not be negative", 
+    errLenXinvalid: "len($1) must be less than 32768",
+    errWrongNumberOfVariables: "wrong number of variables", 
+    errExprCannotBeRaised: "only objects can be raised", 
+    errBreakOnlyInLoop: "'break' only allowed in loop construct", 
+    errTypeXhasUnknownSize: "type \'$1\' has unknown size", 
+    errConstNeedsConstExpr: "a constant can only be initialized with a constant expression", 
+    errConstNeedsValue: "a constant needs a value", 
+    errResultCannotBeOpenArray: "the result type cannot be on open array", 
+    errSizeTooBig: "computing the type\'s size produced an overflow", 
+    errSetTooBig: "set is too large", 
+    errBaseTypeMustBeOrdinal: "base type of a set must be an ordinal", 
+    errInheritanceOnlyWithNonFinalObjects: "inheritance only works with non-final objects", 
+    errInheritanceOnlyWithEnums: "inheritance only works with an enum",
+    errIllegalRecursionInTypeX: "illegal recursion in type \'$1\'", 
+    errCannotInstantiateX: "cannot instantiate: \'$1\'", 
+    errExprHasNoAddress: "expression has no address", 
+    errVarForOutParamNeeded: "for a \'var\' type a variable needs to be passed",
+    errPureTypeMismatch: "type mismatch", 
+    errTypeMismatch: "type mismatch: got (", 
+    errButExpected: "but expected one of: ",
+    errButExpectedX: "but expected \'$1\'", 
+    errAmbiguousCallXYZ: "ambiguous call; both $1 and $2 match for: $3", 
+    errWrongNumberOfArguments: "wrong number of arguments", 
+    errXCannotBePassedToProcVar: "\'$1\' cannot be passed to a procvar", 
+    errXCannotBeInParamDecl: "$1 cannot be declared in parameter declaration", 
+    errPragmaOnlyInHeaderOfProc: "pragmas are only in the header of a proc allowed", 
+    errImplOfXNotAllowed: "implementation of \'$1\' is not allowed", 
+    errImplOfXexpected: "implementation of \'$1\' expected", 
+    errNoSymbolToBorrowFromFound: "no symbol to borrow from found", 
+    errDiscardValue: "value returned by statement has to be discarded", 
+    errInvalidDiscard: "statement returns no value that can be discarded", 
+    errIllegalConvFromXtoY: "conversion from $1 to $2 is invalid",
+    errCannotBindXTwice: "cannot bind parameter \'$1\' twice", 
+    errInvalidOrderInArrayConstructor: "invalid order in array constructor",
+    errInvalidOrderInEnumX: "invalid order in enum \'$1\'", 
+    errEnumXHasHoles: "enum \'$1\' has holes", 
+    errExceptExpected: "\'except\' or \'finally\' expected", 
+    errInvalidTry: "after catch all \'except\' or \'finally\' no section may follow", 
+    errOptionExpected: "option expected, but found \'$1\'",
+    errXisNoLabel: "\'$1\' is not a label", 
+    errNotAllCasesCovered: "not all cases are covered", 
+    errUnkownSubstitionVar: "unknown substitution variable: \'$1\'", 
+    errComplexStmtRequiresInd: "complex statement requires indentation",
+    errXisNotCallable: "\'$1\' is not callable", 
+    errNoPragmasAllowedForX: "no pragmas allowed for $1", 
+    errNoGenericParamsAllowedForX: "no generic parameters allowed for $1", 
+    errInvalidParamKindX: "invalid param kind: \'$1\'", 
+    errDefaultArgumentInvalid: "default argument invalid", 
+    errNamedParamHasToBeIdent: "named parameter has to be an identifier", 
+    errNoReturnTypeForX: "no return type for $1 allowed", 
+    errConvNeedsOneArg: "a type conversion needs exactly one argument", 
+    errInvalidPragmaX: "invalid pragma: $1", 
+    errXNotAllowedHere: "$1 not allowed here",
+    errInvalidControlFlowX: "invalid control flow: $1",
+    errATypeHasNoValue: "a type has no value", 
+    errXisNoType: "invalid type: \'$1\'",
+    errCircumNeedsPointer: "\'^\' needs a pointer or reference type", 
+    errInvalidExpression: "invalid expression",
+    errInvalidExpressionX: "invalid expression: \'$1\'", 
+    errEnumHasNoValueX: "enum has no value \'$1\'",
+    errNamedExprExpected: "named expression expected", 
+    errNamedExprNotAllowed: "named expression not allowed here", 
+    errXExpectsOneTypeParam: "\'$1\' expects one type parameter", 
+    errArrayExpectsTwoTypeParams: "array expects two type parameters", 
+    errInvalidVisibilityX: "invalid visibility: \'$1\'", 
+    errInitHereNotAllowed: "initialization not allowed here", 
+    errXCannotBeAssignedTo: "\'$1\' cannot be assigned to", 
+    errIteratorNotAllowed: "iterators can only be defined at the module\'s top level", 
+    errXNeedsReturnType: "$1 needs a return type",
+    errInvalidCommandX: "invalid command: \'$1\'", 
+    errXOnlyAtModuleScope: "\'$1\' is only allowed at top level", 
+    errXNeedsParamObjectType: "'$1' needs a parameter that has an object type",
+    errTemplateInstantiationTooNested: "template/macro instantiation too nested",
+    errInstantiationFrom: "instantiation from here", 
+    errInvalidIndexValueForTuple: "invalid index value for tuple subscript", 
+    errCommandExpectsFilename: "command expects a filename argument",
+    errXExpected: "\'$1\' expected", 
+    errInvalidSectionStart: "invalid section start",
+    errGridTableNotImplemented: "grid table is not implemented", 
+    errGeneralParseError: "general parse error",
+    errNewSectionExpected: "new section expected", 
+    errWhitespaceExpected: "whitespace expected, got \'$1\'",
+    errXisNoValidIndexFile: "\'$1\' is no valid index file", 
+    errCannotRenderX: "cannot render reStructuredText element \'$1\'", 
+    errVarVarTypeNotAllowed: "type \'var var\' is not allowed",
+    errIsExpectsTwoArguments: "\'is\' expects two arguments", 
+    errIsExpectsObjectTypes: "\'is\' expects object types",
+    errXcanNeverBeOfThisSubtype: "\'$1\' can never be of this subtype", 
+    errTooManyIterations: "interpretation requires too many iterations", 
+    errCannotInterpretNodeX: "cannot interpret node kind \'$1\'", 
+    errFieldXNotFound: "field \'$1\' cannot be found", 
+    errInvalidConversionFromTypeX: "invalid conversion from type \'$1\'",
+    errAssertionFailed: "assertion failed", 
+    errCannotGenerateCodeForX: "cannot generate code for \'$1\'", 
+    errXRequiresOneArgument: "$1 requires one parameter", 
+    errUnhandledExceptionX: "unhandled exception: $1", 
+    errCyclicTree: "macro returned a cyclic abstract syntax tree", 
+    errXisNoMacroOrTemplate: "\'$1\' is no macro or template",
+    errXhasSideEffects: "\'$1\' can have side effects", 
+    errIteratorExpected: "iterator within for loop context expected",
+    errUser: "$1", 
+    warnCannotOpenFile: "cannot open \'$1\' [CannotOpenFile]",
+    warnOctalEscape: "octal escape sequences do not exist; leading zero is ignored [OctalEscape]", 
+    warnXIsNeverRead: "\'$1\' is never read [XIsNeverRead]", 
+    warnXmightNotBeenInit: "\'$1\' might not have been initialized [XmightNotBeenInit]", 
+    warnCannotWriteMO2: "cannot write file \'$1\' [CannotWriteMO2]", 
+    warnCannotReadMO2: "cannot read file \'$1\' [CannotReadMO2]", 
+    warnDeprecated: "\'$1\' is deprecated [Deprecated]", 
+    warnSmallLshouldNotBeUsed: "\'l\' should not be used as an identifier; may look like \'1\' (one) [SmallLshouldNotBeUsed]", 
+    warnUnknownMagic: "unknown magic \'$1\' might crash the compiler [UnknownMagic]", 
+    warnRedefinitionOfLabel: "redefinition of label \'$1\' [RedefinitionOfLabel]", 
+    warnUnknownSubstitutionX: "unknown substitution \'$1\' [UnknownSubstitutionX]", 
+    warnLanguageXNotSupported: "language \'$1\' not supported [LanguageXNotSupported]", 
+    warnCommentXIgnored: "comment \'$1\' ignored [CommentXIgnored]", 
+    warnXisPassedToProcVar: "\'$1\' is passed to a procvar; deprecated [XisPassedToProcVar]", 
+    warnUser: "$1 [User]", 
+    hintSuccess: "operation successful [Success]", 
+    hintSuccessX: "operation successful ($1 lines compiled; $2 sec total) [SuccessX]", 
+    hintLineTooLong: "line too long [LineTooLong]", 
+    hintXDeclaredButNotUsed: "\'$1\' is declared but not used [XDeclaredButNotUsed]", 
+    hintConvToBaseNotNeeded: "conversion to base object is not needed [ConvToBaseNotNeeded]", 
+    hintConvFromXtoItselfNotNeeded: "conversion from $1 to itself is pointless [ConvFromXtoItselfNotNeeded]", 
+    hintExprAlwaysX: "expression evaluates always to \'$1\' [ExprAlwaysX]", 
+    hintQuitCalled: "quit() called [QuitCalled]",
+    hintProcessing: "$1 [Processing]", 
+    hintCodeBegin: "generated code listing: [CodeBegin]",
+    hintCodeEnd: "end of listing [CodeEnd]", 
+    hintConf: "used config file \'$1\' [Conf]", 
+    hintPath: "added path: '$1' [Path]",
+    hintUser: "$1 [User]"]
 
 const 
   WarningsToStr*: array[0..14, string] = ["CannotOpenFile", "OctalEscape", 
@@ -353,7 +444,7 @@ proc checkpoint(info: TLineInfo, filename: string, line: int): bool =
       (ChangeFileExt(extractFilename(filenames[info.fileIndex]), "") ==
       filename)
 
-var checkPoints: seq[TLineInfo] = @ []
+var checkPoints: seq[TLineInfo] = @[]
 
 proc addCheckpoint(info: TLineInfo) = 
   var length: int