| [9430] | 1 | COMPILER GPDefSyntaxAnalyzer
|
|---|
| 2 |
|
|---|
| 3 | CHARACTER SETS
|
|---|
| 4 | letter = 'A'..'Z' + 'a'..'z'.
|
|---|
| 5 | digit = '0'..'9'.
|
|---|
| 6 | whiteSpace = CHR(9) + EOL IGNORE. /* ' ' ignored by default */
|
|---|
| 7 |
|
|---|
| 8 | COMMENTS
|
|---|
| 9 | FROM '/*' TO '*/' NESTED.
|
|---|
| 10 |
|
|---|
| 11 | KEYWORDS
|
|---|
| 12 | 'PROBLEM'. 'END'. 'EPS'.
|
|---|
| 13 | 'LOCAL'. 'NONTERMINALS'. 'RULES'.
|
|---|
| 14 | 'SEM'. 'MAXIMIZE'. 'MINIMIZE'. 'TERMINALS'. 'CONSTRAINTS'. 'INIT'. 'CODE'.
|
|---|
| 15 | 'IN'. 'SET'. 'RANGE'.
|
|---|
| 16 |
|
|---|
| 17 | TOKENS
|
|---|
| 18 | '='. '|'. '.'. '('. ')'. '['. ']'. '{'. '}'. '>>'. '..'.
|
|---|
| 19 |
|
|---|
| 20 | TOKEN CLASSES
|
|---|
| 21 | ident = letter {letter | digit}.
|
|---|
| 22 |
|
|---|
| 23 | PRAGMAS
|
|---|
| 24 | source = '<<' SEM <<for (; ; ) {
|
|---|
| 25 | switch (GPDefSyntaxAnalyzerLex.curCh) {
|
|---|
| 26 | case Utils.EF:
|
|---|
| 27 | Errors.SemError(GPDefSyntaxAnalyzerLex.curLine, GPDefSyntaxAnalyzerLex.curCol, "end of file in source text");
|
|---|
| 28 | return;
|
|---|
| 29 | case '<':
|
|---|
| 30 | GPDefSyntaxAnalyzerLex.NextCh();
|
|---|
| 31 | if (GPDefSyntaxAnalyzerLex.curCh == '<') {
|
|---|
| 32 | Errors.Warning(GPDefSyntaxAnalyzerLex.curLine, GPDefSyntaxAnalyzerLex.curCol, "non closed source text before?");
|
|---|
| 33 | GPDefSyntaxAnalyzerLex.NextCh();
|
|---|
| 34 | }
|
|---|
| 35 | break;
|
|---|
| 36 | case '>':
|
|---|
| 37 | GPDefSyntaxAnalyzerLex.NextCh();
|
|---|
| 38 | if (GPDefSyntaxAnalyzerLex.curCh == '>') {
|
|---|
| 39 | GPDefSyntaxAnalyzerLex.curCh = ' '; // force GPDefSyntaxAnalyzerLex to get next character
|
|---|
| 40 | return;
|
|---|
| 41 | }
|
|---|
| 42 | break;
|
|---|
| 43 | default:
|
|---|
| 44 | GPDefSyntaxAnalyzerLex.NextCh();
|
|---|
| 45 | break;
|
|---|
| 46 | }
|
|---|
| 47 | }>>
|
|---|
| 48 | .
|
|---|
| 49 | NONTERMINALS
|
|---|
| 50 | GPDefSyntaxAnalyzer.
|
|---|
| 51 | SemDecl. SemAction. NonterminalDecl.
|
|---|
| 52 | RuleDef. SynExpr. SynTerm. SynFact. TerminalDecl.
|
|---|
| 53 | ConstraintDef. ConstraintRule. SetDefinition.
|
|---|
| 54 |
|
|---|
| 55 | RULES
|
|---|
| 56 | GPDefSyntaxAnalyzer =
|
|---|
| 57 | 'PROBLEM' ident
|
|---|
| 58 | ['CODE' /* SourceText */]
|
|---|
| 59 | ['INIT' /* SourceText */]
|
|---|
| 60 | 'NONTERMINALS' { NonterminalDecl }
|
|---|
| 61 | 'TERMINALS' { TerminalDecl }
|
|---|
| 62 | 'RULES' { RuleDef }
|
|---|
| 63 | ('MAXIMIZE' | 'MINIMIZE') /* SourceText */
|
|---|
| 64 | 'END' ident '.'.
|
|---|
| 65 |
|
|---|
| 66 |
|
|---|
| 67 | SemDecl = 'LOCAL' /* SourceText */
|
|---|
| 68 | .
|
|---|
| 69 |
|
|---|
| 70 | SemAction = 'SEM' /* SourceText */
|
|---|
| 71 | .
|
|---|
| 72 |
|
|---|
| 73 | NonterminalDecl = ident /* FormalAttrList */ '.'
|
|---|
| 74 |
|
|---|
| 75 |
|
|---|
| 76 |
|
|---|
| 77 | .
|
|---|
| 78 |
|
|---|
| 79 | TerminalDecl = ident /* FormalAttrList */
|
|---|
| 80 | [ 'CONSTRAINTS' ConstraintDef ]
|
|---|
| 81 | '.'
|
|---|
| 82 | .
|
|---|
| 83 |
|
|---|
| 84 | ConstraintDef = { ConstraintRule }.
|
|---|
| 85 | ConstraintRule = ident 'IN' SetDefinition .
|
|---|
| 86 | SetDefinition =
|
|---|
| 87 | 'SET' /* SourceText */
|
|---|
| 88 | | 'RANGE' /* SourceText */ '..' /* SourceText */
|
|---|
| 89 | .
|
|---|
| 90 |
|
|---|
| 91 | RuleDef = ident /* FormalAttrList */ '=' [SemDecl] SynExpr '.'
|
|---|
| 92 | .
|
|---|
| 93 |
|
|---|
| 94 | SynExpr = SynTerm {'|' SynTerm}
|
|---|
| 95 | .
|
|---|
| 96 |
|
|---|
| 97 | SynTerm = SynFact {SynFact}
|
|---|
| 98 | .
|
|---|
| 99 |
|
|---|
| 100 | SynFact =
|
|---|
| 101 | ident /* ActualAttrList */
|
|---|
| 102 | | 'EPS'
|
|---|
| 103 | | '(' SynExpr ')'
|
|---|
| 104 | | '[' SynExpr ']'
|
|---|
| 105 | | '{' SynExpr '}'
|
|---|
| 106 | | SemAction
|
|---|
| 107 | .
|
|---|
| 108 |
|
|---|
| 109 | END GPDefSyntaxAnalyzer. |
|---|
