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added &^ and &^=

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R=rsc
DELTA=14  (12 added, 0 deleted, 2 changed)
OCL=26278
CL=26348
This commit is contained in:
Robert Griesemer 2009-03-16 14:20:08 -07:00
parent 5a27079801
commit 1b141ca068
3 changed files with 14 additions and 2 deletions
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8
src/lib/go/scanner.go
View File

@ -447,7 +447,13 @@ scan_again:
case '>': tok = S.switch4(token.GTR, token.GEQ, '>', token.SHR, token.SHR_ASSIGN); case '>': tok = S.switch4(token.GTR, token.GEQ, '>', token.SHR, token.SHR_ASSIGN);
case '=': tok = S.switch2(token.ASSIGN, token.EQL); case '=': tok = S.switch2(token.ASSIGN, token.EQL);
case '!': tok = S.switch2(token.NOT, token.NEQ); case '!': tok = S.switch2(token.NOT, token.NEQ);
case '&': tok = S.switch3(token.AND, token.AND_ASSIGN, '&', token.LAND); case '&':
if S.ch == '^' {
S.next();
tok = S.switch2(token.AND_NOT, token.AND_NOT_ASSIGN);
} else {
tok = S.switch3(token.AND, token.AND_ASSIGN, '&', token.LAND);
}
case '|': tok = S.switch3(token.OR, token.OR_ASSIGN, '|', token.LOR); case '|': tok = S.switch3(token.OR, token.OR_ASSIGN, '|', token.LOR);
default: S.error(loc, "illegal character " + charString(ch)); default: S.error(loc, "illegal character " + charString(ch));
} }

2
src/lib/go/scanner_test.go
View File

@ -76,6 +76,7 @@ var tokens = [...]elt{
elt{ token.XOR, "^", operator }, elt{ token.XOR, "^", operator },
elt{ token.SHL, "<<", operator }, elt{ token.SHL, "<<", operator },
elt{ token.SHR, ">>", operator }, elt{ token.SHR, ">>", operator },
elt{ token.AND_NOT, "&^", operator },
elt{ token.ADD_ASSIGN, "+=", operator }, elt{ token.ADD_ASSIGN, "+=", operator },
elt{ token.SUB_ASSIGN, "-=", operator }, elt{ token.SUB_ASSIGN, "-=", operator },
@ -88,6 +89,7 @@ var tokens = [...]elt{
elt{ token.XOR_ASSIGN, "^=", operator }, elt{ token.XOR_ASSIGN, "^=", operator },
elt{ token.SHL_ASSIGN, "<<=", operator }, elt{ token.SHL_ASSIGN, "<<=", operator },
elt{ token.SHR_ASSIGN, ">>=", operator }, elt{ token.SHR_ASSIGN, ">>=", operator },
elt{ token.AND_NOT_ASSIGN, "&^=", operator },
elt{ token.LAND, "&&", operator }, elt{ token.LAND, "&&", operator },
elt{ token.LOR, "||", operator }, elt{ token.LOR, "||", operator },

6
src/lib/go/token.go
View File

@ -40,6 +40,7 @@ const (
XOR; XOR;
SHL; SHL;
SHR; SHR;
AND_NOT;
ADD_ASSIGN; ADD_ASSIGN;
SUB_ASSIGN; SUB_ASSIGN;
@ -52,6 +53,7 @@ const (
XOR_ASSIGN; XOR_ASSIGN;
SHL_ASSIGN; SHL_ASSIGN;
SHR_ASSIGN; SHR_ASSIGN;
AND_NOT_ASSIGN;
LAND; LAND;
LOR; LOR;
@ -145,6 +147,7 @@ var tokens = map [int] string {
XOR : "^", XOR : "^",
SHL : "<<", SHL : "<<",
SHR : ">>", SHR : ">>",
AND_NOT : "&^",
ADD_ASSIGN : "+=", ADD_ASSIGN : "+=",
SUB_ASSIGN : "-=", SUB_ASSIGN : "-=",
@ -157,6 +160,7 @@ var tokens = map [int] string {
XOR_ASSIGN : "^=", XOR_ASSIGN : "^=",
SHL_ASSIGN : "<<=", SHL_ASSIGN : "<<=",
SHR_ASSIGN : ">>=", SHR_ASSIGN : ">>=",
AND_NOT_ASSIGN : "&^=",
LAND : "&&", LAND : "&&",
LOR : "||", LOR : "||",
@ -264,7 +268,7 @@ func Precedence(tok int) int {
return 4; return 4;
case ADD, SUB, OR, XOR: case ADD, SUB, OR, XOR:
return 5; return 5;
case MUL, QUO, REM, SHL, SHR, AND: case MUL, QUO, REM, SHL, SHR, AND, AND_NOT:
return 6; return 6;
} }
return LowestPrec; return LowestPrec;