func newScanner() *switchScanner {
var (
c = scan.Char
merge = scan.Merge
or = scan.Or
con = scan.Con
CHAR = c(`\x00-\x7F`)
OCTET = c(`\x00-\xFF`)
CR = c(`\r`)
LF = c(`\n`)
CRLF = con(CR, LF)
SP = c(` `)
HT = c(`\t`)
LWS = con(CRLF.ZeroOrOne(), or(SP, HT).OneOrMore())
CTL = c(`\x00-\x1F\x7F`)
//TEXT = or(OCTET.Exclude(CTL), LWS)
separators = merge(c(`\(\)<>@,;:\\"/\[\]\?=\{\}`), SP, HT)
token = CHAR.Exclude(CTL, separators).OneOrMore()
quotedPair = con(c(`\\`), CHAR)
ctext = or(OCTET.Exclude(CTL, c(`()`), c(`;`)), LWS)
leftParen = c(`(`)
rightParen = c(`)`)
productToken = token
productSep = c(`/`)
commentSep = or(c(`;`), LWS).OneOrMore()
commentText = or(ctext, quotedPair).OneOrMore()
m = scan.NewMatcher(
productToken,
productSep,
LWS,
leftParen,
)
mc = scan.NewMapMatcher(scan.MM{
{leftParen, tLeftParen},
{rightParen, tRightParen},
{commentSep, tCommentSep},
{commentText, tCommentText},
})
scanner = &switchScanner{scan.Scanner{Matcher: m}, m, mc, 0}
)
return scanner
}
matcher = scan.NewMapMatcher(scan.MM{
{newline, tNewline},
{whitespaces, tWhitespace},
{s(`if`), int(token.IF)},
{s(`break`), int(token.BREAK)},
{s(`case`), int(token.CASE)},
{s(`chan`), int(token.CHAN)},
{s(`const`), int(token.CONST)},
{s(`continue`), int(token.CONTINUE)},
{s(`default`), int(token.DEFAULT)},
{s(`defer`), int(token.DEFER)},
{s(`else`), int(token.ELSE)},
{s(`fallthrough`), int(token.FALLTHROUGH)},
{s(`for`), int(token.FOR)},
{s(`func`), int(token.FUNC)},
{s(`goto`), int(token.GOTO)},
{s(`go`), int(token.GO)},
{s(`import`), int(token.IMPORT)},
{s(`interface`), int(token.INTERFACE)},
{s(`map`), int(token.MAP)},
{s(`package`), int(token.PACKAGE)},
{s(`range`), int(token.RANGE)},
{s(`return`), int(token.RETURN)},
{s(`select`), int(token.SELECT)},
{s(`struct`), int(token.STRUCT)},
{s(`switch`), int(token.SWITCH)},
{s(`type`), int(token.TYPE)},
{s(`var`), int(token.VAR)},
{identifier, int(token.IDENT)},
{lineComment, tLineComment},
{generalCommentSL, tGeneralCommentSL},
{generalCommentML, tGeneralCommentML},
{runeLit, int(token.CHAR)},
{imaginaryLit, int(token.IMAG)},
{floatLit, int(token.FLOAT)},
{intLit, int(token.INT)},
{rawStringLit, tRawStringLit},
{interpretedStringLit, tInterpretedStringLit},
{s(`...`), int(token.ELLIPSIS)},
{s(`.`), int(token.PERIOD)},
{s(`(`), int(token.LPAREN)},
{s(`)`), int(token.RPAREN)},
{s(`{`), int(token.LBRACE)},
{s(`}`), int(token.RBRACE)},
{s(`,`), int(token.COMMA)},
{s(`==`), int(token.EQL)},
{s(`=`), int(token.ASSIGN)},
{s(`:=`), int(token.DEFINE)},
{s(`:`), int(token.COLON)},
{s(`+=`), int(token.ADD_ASSIGN)},
{s(`++`), int(token.INC)},
{s(`+`), int(token.ADD)},
{s(`-=`), int(token.SUB_ASSIGN)},
{s(`--`), int(token.DEC)},
{s(`-`), int(token.SUB)},
{s(`*=`), int(token.MUL_ASSIGN)},
{s(`*`), int(token.MUL)},
{s(`/=`), int(token.QUO_ASSIGN)},
{s(`/`), int(token.QUO)},
{s(`%=`), int(token.REM_ASSIGN)},
{s(`%`), int(token.REM)},
{s(`|=`), int(token.OR_ASSIGN)},
{s(`||`), int(token.LOR)},
{s(`|`), int(token.OR)},
{s(`^=`), int(token.XOR_ASSIGN)},
{s(`^`), int(token.XOR)},
{s(`<<=`), int(token.SHL_ASSIGN)},
{s(`<<`), int(token.SHL)},
{s(`>>=`), int(token.SHR_ASSIGN)},
{s(`>>`), int(token.SHR)},
{s(`&^=`), int(token.AND_NOT_ASSIGN)},
{s(`&^`), int(token.AND_NOT)},
{s(`&=`), int(token.AND_ASSIGN)},
{s(`&&`), int(token.LAND)},
{s(`&`), int(token.AND)},
{s(`!=`), int(token.NEQ)},
{s(`!`), int(token.NOT)},
{s(`<=`), int(token.LEQ)},
{s(`<-`), int(token.ARROW)},
{s(`<`), int(token.LSS)},
{s(`>=`), int(token.GEQ)},
{s(`>`), int(token.GTR)},
{s(`[`), int(token.LBRACK)},
{s(`]`), int(token.RBRACK)},
{s(`;`), int(token.SEMICOLON)},
{scan.Pat(`.`), int(token.ILLEGAL)},
})