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Parser.cpp
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/*----------------------------------------------------------------------
Compiler Generator Coco/R,
Copyright (c) 1990, 2004 Hanspeter Moessenboeck, University of Linz
extended by M. Loeberbauer & A. Woess, Univ. of Linz
ported to C++ by Csaba Balazs, University of Szeged
with improvements by Pat Terry, Rhodes University
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.
-----------------------------------------------------------------------*/
#include "Scanner.h"
#include "Parser.h"
namespace Coco {
#ifdef PARSER_WITH_AST
void Parser::AstAddTerminal() {
SynTree *st_t = new SynTree( t->Clone() );
ast_stack.Top()->children.Add(st_t);
}
bool Parser::AstAddNonTerminal(eNonTerminals kind, const wchar_t *nt_name, int line) {
Token *ntTok = new Token();
ntTok->kind = kind;
ntTok->line = line;
ntTok->val = coco_string_create(nt_name);
SynTree *st = new SynTree( ntTok );
ast_stack.Top()->children.Add(st);
ast_stack.Add(st);
return true;
}
void Parser::AstPopNonTerminal() {
ast_stack.Pop();
}
#endif
void Parser::SynErr(int n) {
if (errDist >= minErrDist) errors->SynErr(la->line, la->col, n);
errDist = 0;
}
void Parser::SemErr(const wchar_t* msg) {
if (errDist >= minErrDist) errors->Error(t->line, t->col, msg);
errDist = 0;
}
void Parser::Get() {
for (;;) {
t = la;
la = scanner->Scan();
if (la->kind <= maxT) { ++errDist; break; }
if (la->kind == _ddtSym) {
tab->SetDDT(la->val);
}
if (la->kind == _optionSym) {
tab->SetOption(la->val);
}
if (dummyToken != t) {
dummyToken->kind = t->kind;
dummyToken->pos = t->pos;
dummyToken->col = t->col;
dummyToken->line = t->line;
dummyToken->next = NULL;
coco_string_delete(dummyToken->val);
dummyToken->val = coco_string_create(t->val);
t = dummyToken;
}
la = t;
}
}
bool Parser::IsKind(Token *t, int n) {
static const int tBase[44] = {
-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
-1,-1,-1,-1,
};
int k = t->kind;
while(k >= 0) {
if (k == n) return true;
k = tBase[k];
}
return false;
}
void Parser::Expect(int n) {
if (IsKind(la, n)) Get(); else { SynErr(n); }
}
void Parser::ExpectWeak(int n, int follow) {
if (IsKind(la, n)) Get();
else {
SynErr(n);
while (!StartOf(follow)) Get();
}
}
bool Parser::WeakSeparator(int n, int syFol, int repFol) {
if (IsKind(la, n)) {Get(); return true;}
else if (StartOf(repFol)) {return false;}
else {
SynErr(n);
while (!(StartOf(syFol) || StartOf(repFol) || StartOf(0))) {
Get();
}
return StartOf(syFol);
}
}
void Parser::Coco_NT() {
Symbol *sym; Graph *g, *g1, *g2; wchar_t* gramName = NULL; CharSet *s;
#ifdef PARSER_WITH_AST
Token *ntTok = new Token(); ntTok->kind = eNonTerminals::_Coco; ntTok->line = 0; ntTok->val = coco_string_create(_SC("Coco"));ast_root = new SynTree( ntTok ); ast_stack.Clear(); ast_stack.Add(ast_root);
#endif
int beg = la->pos; int line = la->line;
while (StartOf(1 /* any */)) {
Get();
}
if (la->pos != beg) {
pgen->usingPos = new Position(beg, t->pos + coco_string_length(t->val), 0, line);
}
Expect(6 /* "COMPILER" */);
#ifdef PARSER_WITH_AST
AstAddTerminal();
#endif
genScanner = true;
tab->ignored = new CharSet();
Expect(_ident);
#ifdef PARSER_WITH_AST
AstAddTerminal();
#endif
gramName = coco_string_create(t->val);
beg = la->pos;
line = la->line;
while (StartOf(2 /* any */)) {
Get();
}
tab->semDeclPos = new Position(beg, la->pos, 0, line);
if (IsKind(la, 7 /* "IGNORECASE" */)) {
Get();
#ifdef PARSER_WITH_AST
AstAddTerminal();
#endif
dfa->ignoreCase = true;
}
if (IsKind(la, 8 /* "TERMINALS" */)) {
Get();
#ifdef PARSER_WITH_AST
AstAddTerminal();
#endif
while (IsKind(la, _ident)) {
Get();
#ifdef PARSER_WITH_AST
AstAddTerminal();
#endif
sym = tab->FindSym(t->val);
if (sym != NULL) SemErr(_SC("name declared twice"));
else {
sym = tab->NewSym(NodeType::t, t->val, t->line, t->col);
sym->tokenKind = Symbol::fixedToken;
}
}
}
if (IsKind(la, 9 /* "CHARACTERS" */)) {
Get();
#ifdef PARSER_WITH_AST
AstAddTerminal();
#endif
while (IsKind(la, _ident)) {
SetDecl_NT();
}
}
if (IsKind(la, 10 /* "TOKENS" */)) {
Get();
#ifdef PARSER_WITH_AST
AstAddTerminal();
#endif
while (IsKind(la, _ident) || IsKind(la, _string) || IsKind(la, _char)) {
TokenDecl_NT(NodeType::t);
}
}
if (IsKind(la, 11 /* "PRAGMAS" */)) {
Get();
#ifdef PARSER_WITH_AST
AstAddTerminal();
#endif
while (IsKind(la, _ident) || IsKind(la, _string) || IsKind(la, _char)) {
TokenDecl_NT(NodeType::pr);
}
}
while (IsKind(la, 12 /* "COMMENTS" */)) {
Get();
#ifdef PARSER_WITH_AST
AstAddTerminal();
#endif
bool nested = false;
Expect(13 /* "FROM" */);
#ifdef PARSER_WITH_AST
AstAddTerminal();
#endif
TokenExpr_NT(g1);
Expect(14 /* "TO" */);
#ifdef PARSER_WITH_AST
AstAddTerminal();
#endif
TokenExpr_NT(g2);
if (IsKind(la, 15 /* "NESTED" */)) {
Get();
#ifdef PARSER_WITH_AST
AstAddTerminal();
#endif
nested = true;
}
dfa->NewComment(g1->l, g2->l, nested); delete g1; delete g2;
}
while (IsKind(la, 16 /* "IGNORE" */)) {
Get();
#ifdef PARSER_WITH_AST
AstAddTerminal();
#endif
Set_NT(s);
tab->ignored->Or(s); delete s;
}
while (!(IsKind(la, _EOF) || IsKind(la, 17 /* "PRODUCTIONS" */))) {SynErr(44); Get();}
Expect(17 /* "PRODUCTIONS" */);
#ifdef PARSER_WITH_AST
AstAddTerminal();
#endif
if (genScanner) dfa->MakeDeterministic();
tab->DeleteNodes();
while (IsKind(la, _ident)) {
Get();
#ifdef PARSER_WITH_AST
AstAddTerminal();
#endif
sym = tab->FindSym(t->val);
bool undef = (sym == NULL);
if (undef) sym = tab->NewSym(NodeType::nt, t->val, t->line, t->col);
else {
if (sym->typ == NodeType::nt) {
if (sym->graph != NULL) SemErr(_SC("name declared twice"));
} else SemErr(_SC("this symbol kind not allowed on left side of production"));
sym->line = t->line;
sym->col = t->col;
}
bool noAttrs = (sym->attrPos == NULL);
sym->attrPos = NULL;
if (IsKind(la, 26 /* "<" */) || IsKind(la, 28 /* "<." */)) {
AttrDecl_NT(sym);
}
if (!undef)
if (noAttrs != (sym->attrPos == NULL))
SemErr(_SC("attribute mismatch between declaration and use of this symbol"));
if (IsKind(la, 41 /* "(." */)) {
SemText_NT(sym->semPos);
}
ExpectWeak(18 /* "=" */, 3);
Expression_NT(g);
sym->graph = g->l;
tab->Finish(g);
delete g;
ExpectWeak(19 /* "." */, 4);
}
Expect(20 /* "END" */);
#ifdef PARSER_WITH_AST
AstAddTerminal();
#endif
Expect(_ident);
#ifdef PARSER_WITH_AST
AstAddTerminal();
#endif
if (!coco_string_equal(gramName, t->val))
SemErr(_SC("name does not match grammar name"));
tab->gramSy = tab->FindSym(gramName);
coco_string_delete(gramName);
if (tab->gramSy == NULL)
SemErr(_SC("missing production for grammar name"));
else {
sym = tab->gramSy;
if (sym->attrPos != NULL)
SemErr(_SC("grammar symbol must not have attributes"));
}
tab->noSym = tab->NewSym(NodeType::t, _SC("???"), 0, 0); // noSym gets highest number
tab->SetupAnys();
tab->RenumberPragmas();
if (tab->ddt[2]) tab->PrintNodes();
if (errors->count == 0) {
wprintf(_SC("checking\n"));
tab->CompSymbolSets();
if (tab->ddt[7]) tab->XRef();
bool doGenCode = false;
if(ignoreGammarErrors) {
doGenCode = true;
tab->GrammarCheckAll();
}
else doGenCode = tab->GrammarOk();
if(tab->genRREBNF && doGenCode) {
pgen->WriteRREBNF();
}
if (doGenCode) {
wprintf(_SC("parser"));
pgen->WriteParser();
if (genScanner) {
wprintf(_SC(" + scanner"));
dfa->WriteScanner();
if (tab->ddt[0]) dfa->PrintStates();
}
wprintf(_SC(" generated\n"));
if (tab->ddt[8]) pgen->WriteStatistics();
}
}
if (tab->ddt[6]) tab->PrintSymbolTable();
Expect(19 /* "." */);
#ifdef PARSER_WITH_AST
AstAddTerminal();
#endif
#ifdef PARSER_WITH_AST
AstPopNonTerminal();
#endif
}
void Parser::SetDecl_NT() {
CharSet *s;
#ifdef PARSER_WITH_AST
bool ntAdded = AstAddNonTerminal(eNonTerminals::_SetDecl, _SC("SetDecl"), la->line);
#endif
Expect(_ident);
#ifdef PARSER_WITH_AST
AstAddTerminal();
#endif
wchar_t *name = coco_string_create(t->val);
CharClass *c = tab->FindCharClass(name);
if (c != NULL) SemErr(_SC("name declared twice"));
Expect(18 /* "=" */);
#ifdef PARSER_WITH_AST
AstAddTerminal();
#endif
Set_NT(s);
if (s->Elements() == 0) SemErr(_SC("character set must not be empty"));
tab->NewCharClass(name, s);
coco_string_delete(name);
Expect(19 /* "." */);
#ifdef PARSER_WITH_AST
AstAddTerminal();
#endif
#ifdef PARSER_WITH_AST
if(ntAdded) AstPopNonTerminal();
#endif
}
void Parser::TokenDecl_NT(NodeType typ) {
wchar_t* name = NULL; NodeType kind, kindInherits; Symbol *sym, *inheritsSym; Graph *g;
#ifdef PARSER_WITH_AST
bool ntAdded = AstAddNonTerminal(eNonTerminals::_TokenDecl, _SC("TokenDecl"), la->line);
#endif
Sym_NT(name, kind);
sym = tab->FindSym(name);
if (sym != NULL) SemErr(_SC("name declared twice"));
else {
sym = tab->NewSym(typ, name, t->line, t->col);
sym->tokenKind = Symbol::fixedToken;
}
coco_string_delete(name);
coco_string_delete(tokenString);
if (IsKind(la, 25 /* ":" */)) {
Get();
#ifdef PARSER_WITH_AST
AstAddTerminal();
#endif
Sym_NT(name, kindInherits);
inheritsSym = tab->FindSym(name);
if (inheritsSym == NULL) SemErr(_SC("token can't inherit from unddeclared name"));
else if (inheritsSym == sym) SemErr(_SC("token can not inherit from itself"));
else if (inheritsSym->typ != typ) SemErr(_SC("token can't inherit from different token type"));
else sym->inherits = inheritsSym;
}
while (!(StartOf(5 /* sync */))) {SynErr(45); Get();}
if (IsKind(la, 18 /* "=" */)) {
Get();
#ifdef PARSER_WITH_AST
AstAddTerminal();
#endif
TokenExpr_NT(g);
Expect(19 /* "." */);
#ifdef PARSER_WITH_AST
AstAddTerminal();
#endif
if (kind == str) SemErr(_SC("a literal must not be declared with a structure"));
tab->Finish(g);
if (tokenString == NULL || coco_string_equal(tokenString, noString))
dfa->ConvertToStates(g->l, sym);
else { // TokenExpr is a single string
if (tab->literals[tokenString] != NULL)
SemErr(_SC("token string declared twice"));
tab->literals.Set(tokenString, sym);
dfa->MatchLiteral(tokenString, sym);
}
delete g;
} else if (StartOf(6 /* sem */)) {
if (kind == id) genScanner = false;
else dfa->MatchLiteral(sym->name, sym);
} else SynErr(46);
if (IsKind(la, 41 /* "(." */)) {
SemText_NT(sym->semPos);
if (typ == NodeType::t) errors->Warning(_SC("Warning semantic action on token declarations require a custom Scanner"));
}
#ifdef PARSER_WITH_AST
if(ntAdded) AstPopNonTerminal();
#endif
}
void Parser::TokenExpr_NT(Graph* &g) {
Graph *g2;
#ifdef PARSER_WITH_AST
bool ntAdded = AstAddNonTerminal(eNonTerminals::_TokenExpr, _SC("TokenExpr"), la->line);
#endif
TokenTerm_NT(g);
bool first = true;
while (WeakSeparator(30 /* "|" */,8,7) ) {
TokenTerm_NT(g2);
if (first) { tab->MakeFirstAlt(g); first = false; }
tab->MakeAlternative(g, g2); delete g2;
}
#ifdef PARSER_WITH_AST
if(ntAdded) AstPopNonTerminal();
#endif
}
void Parser::Set_NT(CharSet* &s) {
CharSet *s2;
#ifdef PARSER_WITH_AST
bool ntAdded = AstAddNonTerminal(eNonTerminals::_Set, _SC("Set"), la->line);
#endif
SimSet_NT(s);
while (IsKind(la, 21 /* "+" */) || IsKind(la, 22 /* "-" */)) {
if (IsKind(la, 21 /* "+" */)) {
Get();
#ifdef PARSER_WITH_AST
AstAddTerminal();
#endif
SimSet_NT(s2);
s->Or(s2); delete s2;
} else {
Get();
#ifdef PARSER_WITH_AST
AstAddTerminal();
#endif
SimSet_NT(s2);
s->Subtract(s2); delete s2;
}
}
#ifdef PARSER_WITH_AST
if(ntAdded) AstPopNonTerminal();
#endif
}
void Parser::AttrDecl_NT(Symbol *sym) {
#ifdef PARSER_WITH_AST
bool ntAdded = AstAddNonTerminal(eNonTerminals::_AttrDecl, _SC("AttrDecl"), la->line);
#endif
if (IsKind(la, 26 /* "<" */)) {
Get();
#ifdef PARSER_WITH_AST
AstAddTerminal();
#endif
int beg = la->pos; int col = la->col; int line = la->line;
while (StartOf(9 /* alt */)) {
if (StartOf(10 /* any */)) {
Get();
} else {
Get();
#ifdef PARSER_WITH_AST
AstAddTerminal();
#endif
SemErr(_SC("bad string in attributes"));
}
}
Expect(27 /* ">" */);
#ifdef PARSER_WITH_AST
AstAddTerminal();
#endif
if (t->pos > beg)
sym->attrPos = new Position(beg, t->pos, col, line);
} else if (IsKind(la, 28 /* "<." */)) {
Get();
#ifdef PARSER_WITH_AST
AstAddTerminal();
#endif
int beg = la->pos; int col = la->col; int line = la->line;
while (StartOf(11 /* alt */)) {
if (StartOf(12 /* any */)) {
Get();
} else {
Get();
#ifdef PARSER_WITH_AST
AstAddTerminal();
#endif
SemErr(_SC("bad string in attributes"));
}
}
Expect(29 /* ".>" */);
#ifdef PARSER_WITH_AST
AstAddTerminal();
#endif
if (t->pos > beg)
sym->attrPos = new Position(beg, t->pos, col, line);
} else SynErr(47);
#ifdef PARSER_WITH_AST
if(ntAdded) AstPopNonTerminal();
#endif
}
void Parser::SemText_NT(Position* &pos) {
#ifdef PARSER_WITH_AST
bool ntAdded = AstAddNonTerminal(eNonTerminals::_SemText, _SC("SemText"), la->line);
#endif
Expect(41 /* "(." */);
#ifdef PARSER_WITH_AST
AstAddTerminal();
#endif
int beg = la->pos; int col = la->col; int line = t->line;
while (StartOf(13 /* alt */)) {
if (StartOf(14 /* any */)) {
Get();
} else if (IsKind(la, _badString)) {
Get();
#ifdef PARSER_WITH_AST
AstAddTerminal();
#endif
SemErr(_SC("bad string in semantic action"));
} else {
Get();
#ifdef PARSER_WITH_AST
AstAddTerminal();
#endif
SemErr(_SC("missing end of previous semantic action"));
}
}
Expect(42 /* ".)" */);
#ifdef PARSER_WITH_AST
AstAddTerminal();
#endif
pos = new Position(beg, t->pos, col, line);
#ifdef PARSER_WITH_AST
if(ntAdded) AstPopNonTerminal();
#endif
}
void Parser::Expression_NT(Graph* &g) {
Graph *g2;
#ifdef PARSER_WITH_AST
bool ntAdded = AstAddNonTerminal(eNonTerminals::_Expression, _SC("Expression"), la->line);
#endif
Term_NT(g);
bool first = true;
while (WeakSeparator(30 /* "|" */,16,15) ) {
Term_NT(g2);
if (first) { tab->MakeFirstAlt(g); first = false; }
tab->MakeAlternative(g, g2); delete g2;
}
#ifdef PARSER_WITH_AST
if(ntAdded) AstPopNonTerminal();
#endif
}
void Parser::SimSet_NT(CharSet* &s) {
int n1, n2;
#ifdef PARSER_WITH_AST
bool ntAdded = AstAddNonTerminal(eNonTerminals::_SimSet, _SC("SimSet"), la->line);
#endif
s = new CharSet();
if (IsKind(la, _ident)) {
Get();
#ifdef PARSER_WITH_AST
AstAddTerminal();
#endif
CharClass *c = tab->FindCharClass(t->val);
if (c == NULL) SemErr(_SC("undefined name")); else s->Or(c->set);
} else if (IsKind(la, _string)) {
Get();
#ifdef PARSER_WITH_AST
AstAddTerminal();
#endif
wchar_t *subName2 = coco_string_create(t->val, 1, coco_string_length(t->val)-2);
wchar_t *name = tab->Unescape(subName2);
coco_string_delete(subName2);
wchar_t ch;
int len = coco_string_length(name);
for(int i=0; i < len; i++) {
ch = name[i];
if (dfa->ignoreCase) {
if ((_SC('A') <= ch) && (ch <= _SC('Z'))) ch = ch - (_SC('A') - _SC('a')); // ch.ToLower()
}
s->Set(ch);
}
coco_string_delete(name);
} else if (IsKind(la, _char)) {
Char_NT(n1);
s->Set(n1);
if (IsKind(la, 23 /* ".." */)) {
Get();
#ifdef PARSER_WITH_AST
AstAddTerminal();
#endif
Char_NT(n2);
for (int i = n1; i <= n2; i++) s->Set(i);
}
} else if (IsKind(la, 24 /* "ANY" */)) {
Get();
#ifdef PARSER_WITH_AST
AstAddTerminal();
#endif
delete s; s = new CharSet(); s->Fill();
} else SynErr(48);
#ifdef PARSER_WITH_AST
if(ntAdded) AstPopNonTerminal();
#endif
}
void Parser::Char_NT(int &n) {
#ifdef PARSER_WITH_AST
bool ntAdded = AstAddNonTerminal(eNonTerminals::_Char, _SC("Char"), la->line);
#endif
Expect(_char);
#ifdef PARSER_WITH_AST
AstAddTerminal();
#endif
n = 0;
wchar_t* subName = coco_string_create(t->val, 1, coco_string_length(t->val)-2);
wchar_t* name = tab->Unescape(subName);
coco_string_delete(subName);
// "<= 1" instead of "== 1" to allow the escape sequence '\0' in c++
if (coco_string_length(name) <= 1) n = name[0];
else SemErr(_SC("unacceptable character value"));
coco_string_delete(name);
if (dfa->ignoreCase && (((wchar_t) n) >= 'A') && (((wchar_t) n) <= 'Z')) n += 32;
#ifdef PARSER_WITH_AST
if(ntAdded) AstPopNonTerminal();
#endif
}
void Parser::Sym_NT(wchar_t* &name, NodeType &kind) {
#ifdef PARSER_WITH_AST
bool ntAdded = AstAddNonTerminal(eNonTerminals::_Sym, _SC("Sym"), la->line);
#endif
name = coco_string_create(_SC("???")); kind = id;
if (IsKind(la, _ident)) {
Get();
#ifdef PARSER_WITH_AST
AstAddTerminal();
#endif
kind = id; coco_string_delete(name); name = coco_string_create(t->val);
} else if (IsKind(la, _string) || IsKind(la, _char)) {
if (IsKind(la, _string)) {
Get();
#ifdef PARSER_WITH_AST
AstAddTerminal();
#endif
coco_string_delete(name); name = coco_string_create(t->val);
} else {
Get();
#ifdef PARSER_WITH_AST
AstAddTerminal();
#endif
wchar_t *subName = coco_string_create(t->val, 1, coco_string_length(t->val)-2);
coco_string_delete(name);
name = coco_string_create_append(_SC("\""), subName);
coco_string_delete(subName);
coco_string_merge(name, _SC("\""));
}
kind = str;
if (dfa->ignoreCase) {
wchar_t *oldName = name;
name = coco_string_create_lower(name);
coco_string_delete(oldName);
}
if (coco_string_indexof(name, ' ') >= 0)
SemErr(_SC("literal tokens must not contain blanks"));
} else SynErr(49);
#ifdef PARSER_WITH_AST
if(ntAdded) AstPopNonTerminal();
#endif
}
void Parser::Term_NT(Graph* &g) {
Graph *g2; Node *rslv = NULL; g = NULL;
#ifdef PARSER_WITH_AST
bool ntAdded = AstAddNonTerminal(eNonTerminals::_Term, _SC("Term"), la->line);
#endif
if (StartOf(17 /* opt */)) {
if (IsKind(la, 39 /* "IF" */)) {
rslv = tab->NewNode(NodeType::rslv, (Symbol*)NULL, la->line, la->col);
Resolver_NT(rslv->pos);
g = new Graph(rslv);
}
Factor_NT(g2);
if (rslv != NULL) {tab->MakeSequence(g, g2); delete g2;}
else g = g2;
while (StartOf(18 /* nt */)) {
Factor_NT(g2);
tab->MakeSequence(g, g2); delete g2;
}
} else if (StartOf(19 /* sem */)) {
g = new Graph(tab->NewNode(NodeType::eps, (Symbol*)NULL, t->line, t->col));
} else SynErr(50);
if (g == NULL) // invalid start of Term
g = new Graph(tab->NewNode(NodeType::eps, (Symbol*)NULL, t->line, t->col));
#ifdef PARSER_WITH_AST
if(ntAdded) AstPopNonTerminal();
#endif
}
void Parser::Resolver_NT(Position* &pos) {
#ifdef PARSER_WITH_AST
bool ntAdded = AstAddNonTerminal(eNonTerminals::_Resolver, _SC("Resolver"), la->line);
#endif
Expect(39 /* "IF" */);
#ifdef PARSER_WITH_AST
AstAddTerminal();
#endif
Expect(32 /* "(" */);
#ifdef PARSER_WITH_AST
AstAddTerminal();
#endif
int beg = la->pos; int col = la->col; int line = la->line;
Condition_NT();
pos = new Position(beg, t->pos, col, line);
#ifdef PARSER_WITH_AST
if(ntAdded) AstPopNonTerminal();
#endif
}
void Parser::Factor_NT(Graph* &g) {
wchar_t* name = NULL; NodeType kind; Position *pos; bool weak = false;
g = NULL;
#ifdef PARSER_WITH_AST
bool ntAdded = AstAddNonTerminal(eNonTerminals::_Factor, _SC("Factor"), la->line);
#endif
switch (la->kind) {
case _ident: case _string: case _char: case 31 /* "WEAK" */: {
if (IsKind(la, 31 /* "WEAK" */)) {
Get();
#ifdef PARSER_WITH_AST
AstAddTerminal();
#endif
weak = true;
}
Sym_NT(name, kind);
Symbol *sym = tab->FindSym(name);
if (sym == NULL && kind == str)
sym = (Symbol*)tab->literals[name];
bool undef = (sym == NULL);
if (undef) {
if (kind == id)
sym = tab->NewSym(NodeType::nt, name, t->line, t->col); // forward nt
else if (genScanner) {
sym = tab->NewSym(NodeType::t, name, t->line, t->col);
dfa->MatchLiteral(sym->name, sym);
} else { // undefined string in production
SemErr(_SC("undefined string in production"));
sym = tab->eofSy; // dummy
}
}
coco_string_delete(name);
NodeType typ = sym->typ;
if (typ != NodeType::t && typ != NodeType::nt)
SemErr(_SC("this symbol kind is not allowed in a production"));
if (weak) {
if (typ == NodeType::t) typ = NodeType::wt;
else SemErr(_SC("only terminals may be weak"));
}
Node *p = tab->NewNode(typ, sym, t->line, t->col);
g = new Graph(p);
if (IsKind(la, 26 /* "<" */) || IsKind(la, 28 /* "<." */)) {
Attribs_NT(p);
if (kind != id) SemErr(_SC("a literal must not have attributes"));
}
if (undef)
sym->attrPos = p->pos; // dummy
else if ((p->pos == NULL) != (sym->attrPos == NULL))
SemErr(_SC("attribute mismatch between declaration and use of this symbol"));
break;
}
case 32 /* "(" */: {
Get();
#ifdef PARSER_WITH_AST
AstAddTerminal();
#endif
Expression_NT(g);
Expect(33 /* ")" */);
#ifdef PARSER_WITH_AST
AstAddTerminal();
#endif
break;
}
case 34 /* "[" */: {
Get();
#ifdef PARSER_WITH_AST
AstAddTerminal();
#endif
Expression_NT(g);
Expect(35 /* "]" */);
#ifdef PARSER_WITH_AST
AstAddTerminal();
#endif
tab->MakeOption(g);
break;
}
case 36 /* "{" */: {
Get();
#ifdef PARSER_WITH_AST
AstAddTerminal();
#endif
Expression_NT(g);
Expect(37 /* "}" */);
#ifdef PARSER_WITH_AST
AstAddTerminal();
#endif
tab->MakeIteration(g);
break;
}
case 41 /* "(." */: {
SemText_NT(pos);
Node *p = tab->NewNode(NodeType::sem, (Symbol*)NULL, t->line, t->col);
p->pos = pos;
g = new Graph(p);
break;
}
case 24 /* "ANY" */: {
Get();
#ifdef PARSER_WITH_AST
AstAddTerminal();
#endif
Node *p = tab->NewNode(NodeType::any, (Symbol*)NULL, t->line, t->col); // p.set is set in tab->SetupAnys
g = new Graph(p);
break;
}
case 38 /* "SYNC" */: {
Get();
#ifdef PARSER_WITH_AST
AstAddTerminal();
#endif
Node *p = tab->NewNode(NodeType::nt_sync, (Symbol*)NULL, t->line, t->col);
g = new Graph(p);
break;
}
default: SynErr(51); break;
}
if (g == NULL) // invalid start of Factor
g = new Graph(tab->NewNode(NodeType::eps, (Symbol*)NULL, t->line, t->col));
#ifdef PARSER_WITH_AST
if(ntAdded) AstPopNonTerminal();
#endif
}
void Parser::Attribs_NT(Node *p) {
#ifdef PARSER_WITH_AST
bool ntAdded = AstAddNonTerminal(eNonTerminals::_Attribs, _SC("Attribs"), la->line);
#endif
if (IsKind(la, 26 /* "<" */)) {
Get();
#ifdef PARSER_WITH_AST
AstAddTerminal();
#endif
int beg = la->pos; int col = la->col; int line = la->line;
while (StartOf(9 /* alt */)) {
if (StartOf(10 /* any */)) {
Get();
} else {
Get();
#ifdef PARSER_WITH_AST
AstAddTerminal();
#endif
SemErr(_SC("bad string in attributes"));
}
}
Expect(27 /* ">" */);
#ifdef PARSER_WITH_AST
AstAddTerminal();
#endif
if (t->pos > beg) p->pos = new Position(beg, t->pos, col, line);
} else if (IsKind(la, 28 /* "<." */)) {
Get();
#ifdef PARSER_WITH_AST
AstAddTerminal();
#endif
int beg = la->pos; int col = la->col; int line = la->line;
while (StartOf(11 /* alt */)) {
if (StartOf(12 /* any */)) {
Get();
} else {
Get();
#ifdef PARSER_WITH_AST
AstAddTerminal();
#endif
SemErr(_SC("bad string in attributes"));
}
}
Expect(29 /* ".>" */);
#ifdef PARSER_WITH_AST
AstAddTerminal();
#endif
if (t->pos > beg) p->pos = new Position(beg, t->pos, col, line);
} else SynErr(52);
#ifdef PARSER_WITH_AST
if(ntAdded) AstPopNonTerminal();
#endif
}
void Parser::Condition_NT() {
#ifdef PARSER_WITH_AST
bool ntAdded = AstAddNonTerminal(eNonTerminals::_Condition, _SC("Condition"), la->line);
#endif
while (StartOf(20 /* alt */)) {
if (IsKind(la, 32 /* "(" */)) {
Get();
#ifdef PARSER_WITH_AST
AstAddTerminal();
#endif
Condition_NT();
} else {
Get();
}
}
Expect(33 /* ")" */);
#ifdef PARSER_WITH_AST
AstAddTerminal();
#endif
#ifdef PARSER_WITH_AST
if(ntAdded) AstPopNonTerminal();
#endif
}
void Parser::TokenTerm_NT(Graph* &g) {
Graph *g2;
#ifdef PARSER_WITH_AST
bool ntAdded = AstAddNonTerminal(eNonTerminals::_TokenTerm, _SC("TokenTerm"), la->line);
#endif
TokenFactor_NT(g);
while (StartOf(8 /* nt */)) {
TokenFactor_NT(g2);
tab->MakeSequence(g, g2); delete g2;
}
if (IsKind(la, 40 /* "CONTEXT" */)) {
Get();
#ifdef PARSER_WITH_AST
AstAddTerminal();