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#
#
# The Nimrod Compiler
# (c) Copyright 2012 Andreas Rumpf
#
# See the file "copying.txt", included in this
# distribution, for details about the copyright.
#
# This module contains a word recognizer, i.e. a simple
# procedure which maps special words to an enumeration.
# It is primarily needed because Pascal's case statement
# does not support strings. Without this the code would
# be slow and unreadable.
import
hashes, strutils, idents
# Keywords must be kept sorted and within a range
type
TSpecialWord* = enum
wInvalid,
wAddr, wAnd, wAs, wAsm, wAtomic,
wBind, wBlock, wBreak, wCase, wCast, wConst,
wContinue, wConverter, wDiscard, wDistinct, wDiv, wElif, wElse, wEnd, wEnum,
wExcept, wExport, wFinally, wFor, wFrom, wGeneric, wIf, wImport, wIn,
wInclude, wIs, wIsnot, wIterator, wLambda, wLet,
wMacro, wMethod, wMod, wNil,
wNot, wNotin, wObject, wOf, wOr, wOut, wProc, wPtr, wRaise, wRef, wReturn,
wShl, wShr, wTemplate, wTry, wTuple, wType, wVar, wWhen, wWhile, wWith,
wWithout, wXor, wYield,
wColon, wColonColon, wEquals, wDot, wDotDot, wStar, wMinus,
wMagic, wThread, wFinal, wProfiler, wObjChecks,
wImportCpp, wImportObjC,
wImportCompilerProc,
wImportc, wExportc, wExtern, wIncompleteStruct,
wAlign, wNodecl, wPure, wVolatile, wRegister, wSideeffect, wHeader,
wNosideeffect, wNoreturn, wMerge, wLib, wDynlib, wCompilerproc, wProcVar,
wFatal, wError, wWarning, wHint, wLine, wPush, wPop, wDefine, wUndef,
wLinedir, wStacktrace, wLinetrace, wLink, wCompile,
wLinksys, wDeprecated, wVarargs, wByref, wCallconv, wBreakpoint, wDebugger,
wNimcall, wStdcall, wCdecl, wSafecall, wSyscall, wInline, wNoInline,
wFastcall, wClosure, wNoconv, wOn, wOff, wChecks, wRangechecks,
wBoundchecks, wOverflowchecks, wNilchecks,
wFloatchecks, wNanChecks, wInfChecks,
wAssertions, wWarnings,
wHints, wOptimization, wSpeed, wSize, wNone,
wDeadCodeElim, wSafecode,
wPragma,
wCompileTime, wNoInit,
wPassc, wPassl, wBorrow, wDiscardable,
wFieldChecks,
wWatchPoint, wSubsChar,
wAcyclic, wShallow, wUnroll, wLinearScanEnd,
wWrite, wPutEnv, wPrependEnv, wAppendEnv, wThreadVar, wEmit, wNoStackFrame
TSpecialWords* = set[TSpecialWord]
const
oprLow* = ord(wColon)
oprHigh* = ord(wDotDot)
specialWords*: array[low(TSpecialWord)..high(TSpecialWord), string] = ["",
"addr", "and", "as", "asm", "atomic",
"bind", "block", "break", "case", "cast",
"const", "continue", "converter", "discard", "distinct", "div", "elif",
"else", "end", "enum", "except", "export",
"finally", "for", "from", "generic", "if",
"import", "in", "include", "is", "isnot", "iterator",
"lambda", "let",
"macro", "method", "mod", "nil", "not", "notin", "object", "of", "or",
"out", "proc", "ptr", "raise", "ref", "return", "shl", "shr", "template",
"try", "tuple", "type", "var", "when", "while", "with", "without", "xor",
"yield",
":", "::", "=", ".", "..", "*", "-",
"magic", "thread", "final", "profiler", "objchecks",
"importcpp", "importobjc",
"importcompilerproc", "importc", "exportc", "extern", "incompletestruct",
"align", "nodecl", "pure", "volatile", "register", "sideeffect",
"header", "nosideeffect", "noreturn", "merge", "lib", "dynlib",
"compilerproc", "procvar", "fatal", "error", "warning", "hint", "line",
"push", "pop", "define", "undef", "linedir", "stacktrace", "linetrace",
"link", "compile", "linksys", "deprecated", "varargs",
"byref", "callconv", "breakpoint", "debugger", "nimcall", "stdcall",
"cdecl", "safecall", "syscall", "inline", "noinline", "fastcall", "closure",
"noconv", "on", "off", "checks", "rangechecks", "boundchecks",
"overflowchecks", "nilchecks",
"floatchecks", "nanchecks", "infchecks",
"assertions", "warnings", "hints",
"optimization", "speed", "size", "none",
"deadcodeelim", "safecode",
"pragma",
"compiletime", "noinit",
"passc", "passl", "borrow", "discardable", "fieldchecks",
"watchpoint",
"subschar", "acyclic", "shallow", "unroll", "linearscanend",
"write", "putenv", "prependenv", "appendenv", "threadvar", "emit",
"nostackframe"]
proc findStr*(a: openarray[string], s: string): int =
for i in countup(low(a), high(a)):
if cmpIgnoreStyle(a[i], s) == 0:
return i
result = - 1
proc whichKeyword*(id: PIdent): TSpecialWord =
if id.id < 0: result = wInvalid
else: result = TSpecialWord(id.id)
proc whichKeyword*(id: String): TSpecialWord =
result = whichKeyword(getIdent(id))
proc initSpecials() =
# initialize the keywords:
for s in countup(succ(low(specialWords)), high(specialWords)):
getIdent(specialWords[s], hashIgnoreStyle(specialWords[s])).id = ord(s)
initSpecials()
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