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Parser.ts
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/*-------------------------------------------------------------------------
Compiler Generator Coco/R,
Copyright (c) 1990, 2004 Hanspeter Moessenboeck, University of Linz
extended by M. Loeberbauer & A. Woess, University of Linz
ported from C# to Java by Wolfgang Ahorner
with improvements by Pat Terry, Rhodes University
ported from Java to Typescript by Stefan Kempinger, University of Linz
This program is free software; you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by the
Free Software Foundation; either version 2, or (at your option) any
later version.
This program is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
for more details.
You should have received a copy of the GNU General Public License along
with this program; if not, write to the Free Software Foundation, Inc.,
59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
As an exception, it is allowed to write an extension of Coco/R that is
used as a plugin in non-free software.
If not otherwise stated, any source code generated by Coco/R (other than
Coco/R itself) does not fall under the GNU General Public License.
------------------------------------------------------------------------*/
import {Trace} from "./Trace";
import {Graph, Node_, Position, Symbol, SymInfo, Tab} from "./Tab";
import {ParserGen} from "./ParserGen";
import {CharSet, DFA} from "./DFA";
import {Scanner, Token} from "./Scanner";
export class Parser {
public static _EOF: number = 0;
public static _ident: number = 1;
public static _number: number = 2;
public static _string: number = 3;
public static _badString: number = 4;
public static _char: number = 5;
public static maxT: number = 44;
public static _ddtSym: number = 45;
public static _optionSym: number = 46;
static _T = true;
static _x = false;
static minErrDist = 2;
public t: Token; // last recognized token
public la: Token; // lookahead token
errDist = Parser.minErrDist;
public scanner: Scanner;
public errors: Errors;
static id = 0;
static str = 1;
public trace: Trace; // other Coco objects referenced by this ATG
public tab: Tab;
public dfa: DFA;
public pgen: ParserGen;
genScanner: boolean;
tokenString: string; // used in declarations of literal tokens
noString = "-none-"; // used in declarations of literal tokens
/*-------------------------------------------------------------------------*/
constructor(scanner: Scanner) {
this.scanner = scanner;
this.errors = new Errors();
}
SynErr(n: number) {
if (this.errDist >= Parser.minErrDist) this.errors.SynErr(this.la.line, this.la.col, n);
this.errDist = 0;
}
public SemErr(msg: string) {
if (this.errDist >= Parser.minErrDist) this.errors.SemErr(this.t.line, this.t.col, msg);
this.errDist = 0;
}
Get() {
for (; ;) {
this.t = this.la;
this.la = this.scanner.Scan();
if (this.la.kind <= Parser.maxT) {
++this.errDist;
break;
}
if (this.isLaTokenKindEqualTo(45)) {
this.tab.SetDDT(this.la.val);
}
if (this.isLaTokenKindEqualTo(46)) {
this.tab.SetOption(this.la.val);
}
this.la = this.t;
}
}
private isLaTokenKindEqualTo(n: number): boolean {
return this.la.kind == n;
}
Expect(n: number) {
if (this.la.kind == n)
this.Get();
else {
this.SynErr(n);
}
}
StartOf(s: number): boolean {
return Parser.set[s][this.la.kind];
}
ExpectWeak(n: number, follow: number) {
if (this.la.kind == n) this.Get();
else {
this.SynErr(n);
while (!this.StartOf(follow)) this.Get();
}
}
WeakSeparator(n: number, syFol: number, repFol: number): boolean {
let kind = this.la.kind;
if (kind == n) {
this.Get();
return true;
} else if (this.StartOf(repFol)) return false;
else {
this.SynErr(n);
while (!(Parser.set[syFol][kind] || Parser.set[repFol][kind] || Parser.set[0][kind])) {
this.Get();
kind = this.la.kind;
}
return this.StartOf(syFol);
}
}
Coco() {
let sym: Symbol;
let g, g1, g2: Graph;
let gramName: string;
let s: CharSet;
let beg: number;
if (this.StartOf(1)) {
this.Get();
beg = this.t.pos;
while (this.StartOf(1)) {
this.Get();
}
this.pgen.usingPos = new Position(beg, this.la.pos, 0);
}
this.Expect(6);
this.genScanner = true;
this.tab.ignored = new CharSet();
this.Expect(1);
gramName = this.t.val;
beg = this.la.pos;
while (this.StartOf(2)) {
this.Get();
}
this.tab.semDeclPos = new Position(beg, this.la.pos, 0);
if (this.isLaTokenKindEqualTo(7)) {
this.Get();
this.dfa.ignoreCase = true;
}
if (this.isLaTokenKindEqualTo(8)) {
this.Get();
while (this.isLaTokenKindEqualTo(1)) {
this.SetDecl();
}
}
if (this.isLaTokenKindEqualTo(9)) {
this.Get();
while (this.isLaTokenKindEqualTo(1) || this.isLaTokenKindEqualTo(3) || this.isLaTokenKindEqualTo(5)) {
this.TokenDecl(Node_.t);
}
}
if (this.isLaTokenKindEqualTo(10)) {
this.Get();
while (this.isLaTokenKindEqualTo(1) || this.isLaTokenKindEqualTo(3) || this.isLaTokenKindEqualTo(5)) {
this.TokenDecl(Node_.pr);
}
}
while (this.isLaTokenKindEqualTo(11)) {
this.Get();
let nested = false;
this.Expect(12);
g1 = this.TokenExpr();
this.Expect(13);
g2 = this.TokenExpr();
if (this.isLaTokenKindEqualTo(14)) {
this.Get();
nested = true;
}
this.dfa.NewComment(g1.l, g2.l, nested);
}
while (this.isLaTokenKindEqualTo(15)) {
this.Get();
s = this.Set();
this.tab.ignored.Or(s);
}
while (!(this.isLaTokenKindEqualTo(0) || this.isLaTokenKindEqualTo(16))) {
this.SynErr(45);
this.Get();
}
this.Expect(16);
if (this.genScanner) this.dfa.MakeDeterministic();
this.tab.DeleteNodes();
while (this.isLaTokenKindEqualTo(1)) {
this.Get();
sym = this.tab.FindSym(this.t.val);
let undef = sym == undefined;
if (undef) sym = this.tab.NewSym(Node_.nt, this.t.val, this.t.line);
else {
if (sym.typ == Node_.nt) {
if (sym.graph != undefined) this.SemErr("name declared twice");
} else this.SemErr("this symbol kind not allowed on left side of production");
sym.line = this.t.line;
}
let noAttrs = sym.attrPos == undefined;
sym.attrPos = undefined;
let noRet = sym.retVar == undefined;
sym.retVar = undefined;
if (this.isLaTokenKindEqualTo(24) || this.isLaTokenKindEqualTo(29)) {
this.AttrDecl(sym);
}
if (!undef)
if (noAttrs != (sym.attrPos == undefined)
|| noRet != (sym.retVar == undefined))
this.SemErr("attribute mismatch between declaration and use of this symbol");
if (this.isLaTokenKindEqualTo(42)) {
sym.semPos = this.SemText();
}
this.ExpectWeak(17, 3);
g = this.Expression();
sym.graph = g.l;
this.tab.Finish(g);
this.ExpectWeak(18, 4);
}
this.Expect(19);
this.Expect(1);
if (gramName != this.t.val) {
this.SemErr("name does not match grammar name");
}
this.tab.gramSy = this.tab.FindSym(gramName);
if (this.tab.gramSy == undefined)
this.SemErr("missing production for grammar name");
else {
sym = this.tab.gramSy;
if (sym.attrPos != undefined) {
this.SemErr("grammar symbol must not have attributes");
}
}
this.tab.noSym = this.tab.NewSym(Node_.t, "???", 0); // noSym gets highest number
this.tab.SetupAnys();
this.tab.RenumberPragmas();
if (this.tab.ddt[2]) this.tab.PrintNodes();
if (this.errors.count == 0) {
console.log("checking");
this.tab.CompSymbolSets();
if (this.tab.ddt[7]) this.tab.XRef();
if (this.tab.GrammarOk()) {
console.log("parser");
this.pgen.WriteParser();
if (this.genScanner) {
console.log(" + scanner");
this.dfa.WriteScanner();
if (this.tab.ddt[0]) this.dfa.PrintStates();
}
console.log(" generated");
if (this.tab.ddt[8]) this.pgen.WriteStatistics();
}
}
if (this.tab.ddt[6]) this.tab.PrintSymbolTable();
this.Expect(18);
}
SetDecl() {
let s: CharSet;
this.Expect(1);
let name = this.t.val;
let c = this.tab.FindCharClass(name);
if (c != undefined) this.SemErr("name declared twice");
this.Expect(17);
s = this.Set();
if (s.Elements() == 0) this.SemErr("character set must not be empty");
c = this.tab.NewCharClass(name, s);
this.Expect(18);
}
TokenDecl(typ: number) {
let s: SymInfo;
let sym: Symbol;
let g: Graph;
s = this.Sym();
sym = this.tab.FindSym(s.name);
if (sym != undefined)
this.SemErr("name declared twice");
sym = this.tab.NewSym(typ, s.name, this.t.line);
sym.tokenKind = Symbol.fixedToken;
this.tokenString = undefined;
while (!(this.StartOf(5))) {
this.SynErr(46);
this.Get();
}
if (this.isLaTokenKindEqualTo(17)) {
this.Get();
g = this.TokenExpr();
this.Expect(18);
if (s.kind == Parser.str) this.SemErr("a literal must not be declared with a structure");
this.tab.Finish(g);
if (this.tokenString == undefined || this.tokenString === this.noString)
this.dfa.ConvertToStates(g.l, sym);
else { // TokenExpr is a single string
if (this.tab.literals[this.tokenString] != undefined)
this.SemErr("token string declared twice");
this.tab.literals[this.tokenString] = sym;
this.dfa.MatchLiteral(this.tokenString, sym);
}
} else if (this.StartOf(6)) {
if (s.kind == Parser.id) this.genScanner = false;
else this.dfa.MatchLiteral(sym.name, sym);
} else this.SynErr(47);
if (this.isLaTokenKindEqualTo(42)) {
sym.semPos = this.SemText();
if (typ != Node_.pr) this.SemErr("semantic action not allowed here");
}
}
TokenExpr(): Graph {
let g: Graph;
let g2: Graph;
g = this.TokenTerm();
let first = true;
while (this.WeakSeparator(33, 7, 8)) {
g2 = this.TokenTerm();
if (first) {
this.tab.MakeFirstAlt(g);
first = false;
}
this.tab.MakeAlternative(g, g2);
}
return g;
}
Set(): CharSet {
let s: CharSet;
let s2: CharSet;
s = this.SimSet();
while (this.isLaTokenKindEqualTo(20) || this.isLaTokenKindEqualTo(21)) {
if (this.isLaTokenKindEqualTo(20)) {
this.Get();
s2 = this.SimSet();
s.Or(s2);
} else {
this.Get();
s2 = this.SimSet();
s.Subtract(s2);
}
}
return s;
}
AttrDecl(sym: Symbol) {
let beg, col: number;
if (this.isLaTokenKindEqualTo(24)) {
this.Get();
if (this.isLaTokenKindEqualTo(25) || this.isLaTokenKindEqualTo(26)) {
if (this.isLaTokenKindEqualTo(25)) {
this.Get();
} else {
this.Get();
}
beg = this.la.pos;
this.TypeName();
sym.retType = this.scanner.buffer.GetString(beg, this.la.pos);
this.Expect(1);
sym.retVar = this.t.val;
if (this.isLaTokenKindEqualTo(27)) {
this.Get();
} else if (this.isLaTokenKindEqualTo(28)) {
this.Get();
beg = this.la.pos;
col = this.la.col;
while (this.StartOf(9)) {
this.Get();
}
this.Expect(27);
if (this.t.pos > beg) sym.attrPos = new Position(beg, this.t.pos, col);
} else this.SynErr(48);
} else if (this.StartOf(10)) {
beg = this.la.pos;
col = this.la.col;
if (this.StartOf(11)) {
this.Get();
while (this.StartOf(9)) {
this.Get();
}
}
this.Expect(27);
if (this.t.pos > beg) sym.attrPos = new Position(beg, this.t.pos, col);
} else this.SynErr(49);
} else if (this.isLaTokenKindEqualTo(29)) {
this.Get();
if (this.isLaTokenKindEqualTo(25) || this.isLaTokenKindEqualTo(26)) {
if (this.isLaTokenKindEqualTo(25)) {
this.Get();
} else {
this.Get();
}
beg = this.la.pos;
this.TypeName();
sym.retType = this.scanner.buffer.GetString(beg, this.la.pos);
this.Expect(1);
sym.retVar = this.t.val;
if (this.isLaTokenKindEqualTo(30)) {
this.Get();
} else if (this.isLaTokenKindEqualTo(28)) {
this.Get();
beg = this.la.pos;
col = this.la.col;
while (this.StartOf(12)) {
this.Get();
}
this.Expect(30);
if (this.t.pos > beg) sym.attrPos = new Position(beg, this.t.pos, col);
} else this.SynErr(50);
} else if (this.StartOf(10)) {
beg = this.la.pos;
col = this.la.col;
if (this.StartOf(13)) {
this.Get();
while (this.StartOf(12)) {
this.Get();
}
}
this.Expect(30);
if (this.t.pos > beg) sym.attrPos = new Position(beg, this.t.pos, col);
} else this.SynErr(51);
} else this.SynErr(52);
}
SemText(): Position {
let pos: Position;
this.Expect(42);
let beg = this.la.pos;
let col = this.la.col;
while (this.StartOf(14)) {
if (this.StartOf(15)) {
this.Get();
} else if (this.isLaTokenKindEqualTo(4)) {
this.Get();
this.SemErr("bad string in semantic action");
} else {
this.Get();
this.SemErr("missing end of previous semantic action");
}
}
this.Expect(43);
pos = new Position(beg, this.t.pos, col);
return pos;
}
Expression(): Graph {
let g: Graph;
let g2: Graph;
g = this.Term();
let first = true;
while (this.WeakSeparator(33, 16, 17)) {
g2 = this.Term();
if (first) {
this.tab.MakeFirstAlt(g);
first = false;
}
this.tab.MakeAlternative(g, g2);
}
return g;
}
SimSet(): CharSet {
let s: CharSet;
let n1, n2: number;
s = new CharSet();
if (this.isLaTokenKindEqualTo(1)) {
this.Get();
let c = this.tab.FindCharClass(this.t.val);
if (c == undefined) this.SemErr("undefined name"); else s.Or(c.set);
} else if (this.isLaTokenKindEqualTo(3)) {
this.Get();
let name = this.t.val;
name = this.tab.Unescape(name.substring(1, name.length - 1));
for (let i = 0; i < name.length; i++)
if (this.dfa.ignoreCase)
s.Set(name.toLowerCase().charCodeAt(0));
else
s.Set(name.charCodeAt(i));
} else if (this.isLaTokenKindEqualTo(5)) {
n1 = this.Char();
s.Set(n1);
if (this.isLaTokenKindEqualTo(22)) {
this.Get();
n2 = this.Char();
for (let i = n1; i <= n2; i++) s.Set(i);
}
} else if (this.isLaTokenKindEqualTo(23)) {
this.Get();
s = new CharSet();
s.Fill();
} else this.SynErr(53);
return s;
}
Char(): number {
let n: number;
this.Expect(5);
let name_ = this.t.val;
n = 0;
name_ = this.tab.Unescape(name_.substring(1, name_.length - 1));
if (name_.length == 1) n = name_.charAt(0).charCodeAt(0);
else this.SemErr("unacceptable character value");
if (this.dfa.ignoreCase && n >= 'A'.charCodeAt(0) && n <= 'Z'.charCodeAt(0)) n += 32;
return n;
}
Sym(): SymInfo {
let s: SymInfo;
s = new SymInfo();
s.name = "???";
s.kind = Parser.id;
if (this.isLaTokenKindEqualTo(1)) {
this.Get();
s.kind = Parser.id;
s.name = this.t.val;
} else if (this.isLaTokenKindEqualTo(3) || this.isLaTokenKindEqualTo(5)) {
if (this.isLaTokenKindEqualTo(3)) {
this.Get();
s.name = this.t.val;
} else {
this.Get();
s.name = "\"" + this.t.val.substring(1, this.t.val.length - 1) + "\"";
}
s.kind = Parser.str;
if (this.dfa.ignoreCase) s.name = s.name.toLowerCase();
if (s.name.indexOf(' ') >= 0)
this.SemErr("literal tokens must not contain blanks");
} else this.SynErr(54);
return s;
}
TypeName() {
this.Expect(1);
while (this.isLaTokenKindEqualTo(18) || this.isLaTokenKindEqualTo(24) || this.isLaTokenKindEqualTo(31)) {
if (this.isLaTokenKindEqualTo(18)) {
this.Get();
this.Expect(1);
} else if (this.isLaTokenKindEqualTo(31)) {
this.Get();
this.Expect(32);
} else {
this.Get();
this.TypeName();
while (this.isLaTokenKindEqualTo(28)) {
this.Get();
this.TypeName();
}
this.Expect(27);
}
}
}
Term(): Graph {
let g: Graph;
let g2: Graph;
let rslv: Node_ = undefined;
g = undefined;
if (this.StartOf(18)) {
if (this.isLaTokenKindEqualTo(40)) {
rslv = this.tab.NewNode(Node_.rslv, undefined, this.la.line);
rslv.pos = this.Resolver();
g = new Graph(rslv);
}
g2 = this.Factor();
if (rslv != undefined) this.tab.MakeSequence(g, g2);
else g = g2;
while (this.StartOf(19)) {
g2 = this.Factor();
this.tab.MakeSequence(g, g2);
}
} else if (this.StartOf(20)) {
g = new Graph(this.tab.NewNode(Node_.eps, undefined, 0));
} else this.SynErr(55);
if (g == undefined) // invalid start of Term
g = new Graph(this.tab.NewNode(Node_.eps, undefined, 0));
return g;
}
Resolver(): Position {
let pos: Position;
this.Expect(40);
this.Expect(35);
let beg = this.la.pos;
let col = this.la.col;
this.Condition();
pos = new Position(beg, this.t.pos, col);
return pos;
}
Factor(): Graph {
let g: Graph;
let s: SymInfo;
let pos: Position;
let weak = false;
g = undefined;
let p: Node_;
switch (this.la.kind) {
case 1:
case 3:
case 5:
case 34: {
if (this.isLaTokenKindEqualTo(34)) {
this.Get();
weak = true;
}
s = this.Sym();
let sym = this.tab.FindSym(s.name);
if (sym == undefined && s.kind == Parser.str)
sym = this.tab.literals[s.name];
let undef = sym == undefined;
if (undef) {
if (s.kind == Parser.id)
sym = this.tab.NewSym(Node_.nt, s.name, 0); // forward nt
else if (this.genScanner) {
sym = this.tab.NewSym(Node_.t, s.name, this.t.line);
this.dfa.MatchLiteral(sym.name, sym);
} else { // undefined string in production
this.SemErr("undefined string in production");
sym = this.tab.eofSy; // dummy
}
}
let typ = sym.typ;
if (typ != Node_.t && typ != Node_.nt)
this.SemErr("this symbol kind is not allowed in a production");
if (weak)
if (typ == Node_.t) typ = Node_.wt;
else this.SemErr("only terminals may be weak");
p = this.tab.NewNode(typ, sym, this.t.line);
g = new Graph(p);
if (this.isLaTokenKindEqualTo(24) || this.isLaTokenKindEqualTo(29)) {
this.Attribs(p);
if (s.kind != Parser.id) this.SemErr("a literal must not have attributes");
}
if (undef) {
sym.attrPos = p.pos; // dummy
sym.retVar = p.retVar; // AH - dummy
} else if ((p.pos == undefined) != (sym.attrPos == undefined) || (p.retVar == undefined) != (sym.retVar == undefined))
this.SemErr("attribute mismatch between declaration and use of this symbol");
break;
}
case 35: {
this.Get();
g = this.Expression();
this.Expect(36);
break;
}
case 31: {
this.Get();
g = this.Expression();
this.Expect(32);
this.tab.MakeOption(g);
break;
}
case 37: {
this.Get();
g = this.Expression();
this.Expect(38);
this.tab.MakeIteration(g);
break;
}
case 42: {
pos = this.SemText();
p = this.tab.NewNode(Node_.sem, undefined, 0);
p.pos = pos;
g = new Graph(p);
break;
}
case 23: {
this.Get();
p = this.tab.NewNode(Node_.any, undefined, this.t.line); // p.set is set in tab.SetupAnys
g = new Graph(p);
break;
}
case 39: {
this.Get();
p = this.tab.NewNode(Node_.sync, undefined, 0);
g = new Graph(p);
break;
}
default:
this.SynErr(56);
break;
}
if (g == undefined) // invalid start of Factor
g = new Graph(this.tab.NewNode(Node_.eps, undefined, 0));
return g;
}
Attribs(n: Node_) {
let beg, col: number;
if (this.isLaTokenKindEqualTo(24)) {
this.Get();
if (this.isLaTokenKindEqualTo(25) || this.isLaTokenKindEqualTo(26)) {
if (this.isLaTokenKindEqualTo(25)) {
this.Get();
} else {
this.Get();
}
beg = this.la.pos;
while (this.StartOf(21)) {
if (this.StartOf(22)) {
this.Get();
} else if (this.isLaTokenKindEqualTo(31) || this.isLaTokenKindEqualTo(35)) {
this.Bracketed();
} else {
this.Get();
this.SemErr("bad string in attributes");
}
}
n.retVar = this.scanner.buffer.GetString(beg, this.la.pos);
if (this.isLaTokenKindEqualTo(27)) {
this.Get();
} else if (this.isLaTokenKindEqualTo(28)) {
this.Get();
beg = this.la.pos;
col = this.la.col;
while (this.StartOf(9)) {
if (this.StartOf(23)) {
this.Get();
} else {
this.Get();
this.SemErr("bad string in attributes");
}
}
this.Expect(27);
if (this.t.pos > beg) n.pos = new Position(beg, this.t.pos, col);
} else this.SynErr(57);
} else if (this.StartOf(10)) {
beg = this.la.pos;
col = this.la.col;
if (this.StartOf(11)) {
if (this.StartOf(24)) {
this.Get();
} else {
this.Get();
this.SemErr("bad string in attributes");
}
while (this.StartOf(9)) {
if (this.StartOf(23)) {
this.Get();
} else {
this.Get();
this.SemErr("bad string in attributes");
}
}
}
this.Expect(27);
if (this.t.pos > beg) n.pos = new Position(beg, this.t.pos, col);
} else this.SynErr(58);
} else if (this.isLaTokenKindEqualTo(29)) {
this.Get();
if (this.isLaTokenKindEqualTo(25) || this.isLaTokenKindEqualTo(26)) {
if (this.isLaTokenKindEqualTo(25)) {
this.Get();
} else {
this.Get();
}
beg = this.la.pos;
while (this.StartOf(25)) {
if (this.StartOf(26)) {
this.Get();
} else if (this.isLaTokenKindEqualTo(31) || this.isLaTokenKindEqualTo(35)) {
this.Bracketed();
} else {
this.Get();
this.SemErr("bad string in attributes");
}
}
n.retVar = this.scanner.buffer.GetString(beg, this.la.pos);
if (this.isLaTokenKindEqualTo(30)) {
this.Get();
} else if (this.isLaTokenKindEqualTo(28)) {
this.Get();
beg = this.la.pos;
col = this.la.col;
while (this.StartOf(12)) {
if (this.StartOf(27)) {
this.Get();
} else {
this.Get();
this.SemErr("bad string in attributes");
}
}
this.Expect(30);
if (this.t.pos > beg) n.pos = new Position(beg, this.t.pos, col);
} else this.SynErr(59);
} else if (this.StartOf(10)) {
beg = this.la.pos;
col = this.la.col;
if (this.StartOf(13)) {
if (this.StartOf(28)) {
this.Get();
} else {
this.Get();
this.SemErr("bad string in attributes");
}
while (this.StartOf(12)) {
if (this.StartOf(27)) {
this.Get();
} else {
this.Get();
this.SemErr("bad string in attributes");
}
}
}
this.Expect(30);
if (this.t.pos > beg) n.pos = new Position(beg, this.t.pos, col);
} else this.SynErr(60);
} else this.SynErr(61);
}
Condition() {
while (this.StartOf(29)) {
if (this.isLaTokenKindEqualTo(35)) {
this.Get();
this.Condition();
} else {
this.Get();
}
}
this.Expect(36);
}
TokenTerm(): Graph {
let g: Graph;
let g2: Graph;
g = this.TokenFactor();
while (this.StartOf(7)) {
g2 = this.TokenFactor();
this.tab.MakeSequence(g, g2);
}
if (this.isLaTokenKindEqualTo(41)) {
this.Get();
this.Expect(35);
g2 = this.TokenExpr();
this.tab.SetContextTrans(g2.l);
this.dfa.hasCtxMoves = true;
this.tab.MakeSequence(g, g2);
this.Expect(36);
}
return g;
}
TokenFactor(): Graph {
let g: Graph;
let s: SymInfo;
g = undefined;
if (this.isLaTokenKindEqualTo(1) || this.isLaTokenKindEqualTo(3) || this.isLaTokenKindEqualTo(5)) {
s = this.Sym();
if (s.kind == Parser.id) {
let c = this.tab.FindCharClass(s.name);
if (c == undefined) {
this.SemErr("undefined name");
c = this.tab.NewCharClass(s.name, new CharSet());
}
let p = this.tab.NewNode(Node_.clas, undefined, 0);
p.val = c.n;
g = new Graph(p);
this.tokenString = this.noString;
} else { // str
g = this.tab.StrToGraph(s.name);
if (this.tokenString == undefined) this.tokenString = s.name;
else this.tokenString = this.noString;
}
} else if (this.isLaTokenKindEqualTo(35)) {
this.Get();
g = this.TokenExpr();
this.Expect(36);
} else if (this.isLaTokenKindEqualTo(31)) {
this.Get();
g = this.TokenExpr();
this.Expect(32);
this.tab.MakeOption(g);
this.tokenString = this.noString;
} else if (this.isLaTokenKindEqualTo(37)) {
this.Get();
g = this.TokenExpr();
this.Expect(38);
this.tab.MakeIteration(g);
this.tokenString = this.noString;
} else this.SynErr(62);
if (g == undefined) // invalid start of TokenFactor
g = new Graph(this.tab.NewNode(Node_.eps, undefined, 0));
return g;
}
Bracketed() {
if (this.isLaTokenKindEqualTo(35)) {
this.Get();
while (this.StartOf(29)) {
if (this.isLaTokenKindEqualTo(31) || this.isLaTokenKindEqualTo(35)) {
this.Bracketed();
} else {
this.Get();
}
}
this.Expect(36);
} else if (this.isLaTokenKindEqualTo(31)) {
this.Get();
while (this.StartOf(30)) {
if (this.isLaTokenKindEqualTo(31) || this.isLaTokenKindEqualTo(35)) {
this.Bracketed();
} else {
this.Get();
}
}
this.Expect(32);
} else this.SynErr(63);
}
public Parse() {
this.la = new Token();
this.la.val = "";
this.Get();
this.Coco();
this.Expect(0);
}
static set: boolean[][] = [
[Parser._T, Parser._T, Parser._x, Parser._T, Parser._x, Parser._T, Parser._x, Parser._x, Parser._x, Parser._x, Parser._T, Parser._T, Parser._x, Parser._x, Parser._x, Parser._T, Parser._T, Parser._T, Parser._x, Parser._x, Parser._x, Parser._x, Parser._x, Parser._x, Parser._x, Parser._x, Parser._x, Parser._x, Parser._x, Parser._x, Parser._x, Parser._x, Parser._x, Parser._x, Parser._x, Parser._x, Parser._x, Parser._x, Parser._x, Parser._x, Parser._x, Parser._x, Parser._T, Parser._x, Parser._x, Parser._x],
[Parser._x, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._x, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._x],
[Parser._x, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._x, Parser._x, Parser._x, Parser._x, Parser._x, Parser._T, Parser._T, Parser._T, Parser._x, Parser._x, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._x],
[Parser._T, Parser._T, Parser._x, Parser._T, Parser._x, Parser._T, Parser._x, Parser._x, Parser._x, Parser._x, Parser._T, Parser._T, Parser._x, Parser._x, Parser._x, Parser._T, Parser._T, Parser._T, Parser._T, Parser._x, Parser._x, Parser._x, Parser._x, Parser._T, Parser._x, Parser._x, Parser._x, Parser._x, Parser._x, Parser._x, Parser._x, Parser._T, Parser._x, Parser._T, Parser._T, Parser._T, Parser._x, Parser._T, Parser._x, Parser._T, Parser._T, Parser._x, Parser._T, Parser._x, Parser._x, Parser._x],
[Parser._T, Parser._T, Parser._x, Parser._T, Parser._x, Parser._T, Parser._x, Parser._x, Parser._x, Parser._x, Parser._T, Parser._T, Parser._x, Parser._x, Parser._x, Parser._T, Parser._T, Parser._T, Parser._x, Parser._T, Parser._x, Parser._x, Parser._x, Parser._x, Parser._x, Parser._x, Parser._x, Parser._x, Parser._x, Parser._x, Parser._x, Parser._x, Parser._x, Parser._x, Parser._x, Parser._x, Parser._x, Parser._x, Parser._x, Parser._x, Parser._x, Parser._x, Parser._T, Parser._x, Parser._x, Parser._x],
[Parser._T, Parser._T, Parser._x, Parser._T, Parser._x, Parser._T, Parser._x, Parser._x, Parser._x, Parser._x, Parser._T, Parser._T, Parser._x, Parser._x, Parser._x, Parser._T, Parser._T, Parser._T, Parser._x, Parser._x, Parser._x, Parser._x, Parser._x, Parser._x, Parser._x, Parser._x, Parser._x, Parser._x, Parser._x, Parser._x, Parser._x, Parser._x, Parser._x, Parser._x, Parser._x, Parser._x, Parser._x, Parser._x, Parser._x, Parser._x, Parser._x, Parser._x, Parser._T, Parser._x, Parser._x, Parser._x],
[Parser._x, Parser._T, Parser._x, Parser._T, Parser._x, Parser._T, Parser._x, Parser._x, Parser._x, Parser._x, Parser._T, Parser._T, Parser._x, Parser._x, Parser._x, Parser._T, Parser._T, Parser._x, Parser._x, Parser._x, Parser._x, Parser._x, Parser._x, Parser._x, Parser._x, Parser._x, Parser._x, Parser._x, Parser._x, Parser._x, Parser._x, Parser._x, Parser._x, Parser._x, Parser._x, Parser._x, Parser._x, Parser._x, Parser._x, Parser._x, Parser._x, Parser._x, Parser._T, Parser._x, Parser._x, Parser._x],
[Parser._x, Parser._T, Parser._x, Parser._T, Parser._x, Parser._T, Parser._x, Parser._x, Parser._x, Parser._x, Parser._x, Parser._x, Parser._x, Parser._x, Parser._x, Parser._x, Parser._x, Parser._x, Parser._x, Parser._x, Parser._x, Parser._x, Parser._x, Parser._x, Parser._x, Parser._x, Parser._x, Parser._x, Parser._x, Parser._x, Parser._x, Parser._T, Parser._x, Parser._x, Parser._x, Parser._T, Parser._x, Parser._T, Parser._x, Parser._x, Parser._x, Parser._x, Parser._x, Parser._x, Parser._x, Parser._x],
[Parser._x, Parser._x, Parser._x, Parser._x, Parser._x, Parser._x, Parser._x, Parser._x, Parser._x, Parser._x, Parser._x, Parser._T, Parser._x, Parser._T, Parser._T, Parser._T, Parser._T, Parser._x, Parser._T, Parser._x, Parser._x, Parser._x, Parser._x, Parser._x, Parser._x, Parser._x, Parser._x, Parser._x, Parser._x, Parser._x, Parser._x, Parser._x, Parser._T, Parser._x, Parser._x, Parser._x, Parser._T, Parser._x, Parser._T, Parser._x, Parser._x, Parser._x, Parser._x, Parser._x, Parser._x, Parser._x],
[Parser._x, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._x, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._x],
[Parser._x, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._x, Parser._x, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._x],
[Parser._x, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._x, Parser._x, Parser._x, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._x],
[Parser._x, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._x, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._x],
[Parser._x, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._x, Parser._x, Parser._T, Parser._T, Parser._T, Parser._x, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._T, Parser._x],
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