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version 1.1.2.1, 2001/11/30 02:53:56
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version 1.1.2.4, 2001/12/02 07:52:38
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| # include <alloca.h> | # include <alloca.h> |
| #endif | #endif |
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#if 0 |
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# define WQL_TRACE(X) printf(X) |
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#else |
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# define WQL_TRACE(X) |
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#endif |
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| extern int WQL_lex(); | extern int WQL_lex(); |
| extern int WQL_error(char*); | extern int WQL_error(char*); |
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| %token <intValue> TOK_INTEGER | %token <intValue> TOK_INTEGER |
| %token <doubleValue> TOK_DOUBLE | %token <doubleValue> TOK_DOUBLE |
| %token <strValue> STRING_LITERAL |
%token <strValue> TOK_STRING |
| %token <intValue> EQ |
%token <intValue> TOK_TRUE |
| %token <intValue> NE |
%token <intValue> TOK_FALSE |
| %token <intValue> LT |
%token <intValue> TOK_NULL |
| %token <intValue> LE |
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| %token <intValue> GT |
%token <intValue> TOK_EQ |
| %token <intValue> GE |
%token <intValue> TOK_NE |
| %token <intValue> TOK_SELECT |
%token <intValue> TOK_LT |
| %token <intValue> WHERE |
%token <intValue> TOK_LE |
| %token <intValue> FROM |
%token <intValue> TOK_GT |
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%token <intValue> TOK_GE |
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%token <intValue> TOK_NOT |
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%token <intValue> TOK_OR |
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%token <intValue> TOK_AND |
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%token <intValue> TOK_IS |
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| %token <strValue> TOK_IDENTIFIER | %token <strValue> TOK_IDENTIFIER |
| %token <intValue> NOT |
%token <intValue> TOK_SELECT |
| %token <intValue> OR |
%token <intValue> TOK_WHERE |
| %token <intValue> AND |
%token <intValue> TOK_FROM |
| %token <intValue> ISA |
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| %token <intValue> WQL_TRUE |
%token <strValue> TOK_UNEXPECTED_CHAR |
| %token <intValue> WQL_FALSE |
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%type <nodeValue> propertyName |
| %type <nodeValue> constant |
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| %type <nodeValue> property |
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| %type <nodeValue> propertyListOrStar |
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| %type <nodeValue> propertyList | %type <nodeValue> propertyList |
| %type <nodeValue> expressionTerm |
%type <nodeValue> predicate |
| %type <nodeValue> expression |
%type <nodeValue> comparisonPredicate |
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%type <nodeValue> comparisonTerm |
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%type <nodeValue> nullPredicate |
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%type <nodeValue> searchCondition |
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%type <nodeValue> fromClause |
| %type <nodeValue> whereClause | %type <nodeValue> whereClause |
| %type <strValue> fromClass |
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| %type <nodeValue> selectStatement | %type <nodeValue> selectStatement |
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%type <nodeValue> selectList |
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%type <nodeValue> selectExpression |
| %type <strValue> className | %type <strValue> className |
| %type <nodeValue> function |
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| %type <nodeValue> functionParameterList |
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| %type <nodeValue> functionParameter |
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| %left OR |
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| %left AND |
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| %nonassoc NOT |
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| /* |
%left TOK_OR |
| **============================================================================== |
%left TOK_AND |
| ** |
%nonassoc TOK_NOT |
| ** The grammar itself. |
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| ** |
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| **============================================================================== |
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| */ |
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| %% | %% |
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| /* | /* |
| **------------------------------------------------------------------------------ |
**============================================================================== |
| ** | ** |
| ** start rule: |
** The grammar itself. |
| ** | ** |
| **------------------------------------------------------------------------------ |
**============================================================================== |
| */ | */ |
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| start | start |
| : selectStatement | : selectStatement |
| { | { |
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printf("YACC: start\n"); |
| } | } |
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| /* BOOKMARK */ |
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| /* |
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| **------------------------------------------------------------------------------ |
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| ** |
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| ** Select Statement |
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| ** |
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| **------------------------------------------------------------------------------ |
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| */ |
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| selectStatement | selectStatement |
| : TOK_SELECT propertyListOrStar fromClass |
: TOK_SELECT selectList selectExpression |
| { |
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| } |
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| | TOK_SELECT propertyListOrStar fromClass whereClause |
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| } |
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| fromClass : FROM className |
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| { |
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| $$ = $2; |
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| } |
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| className : TOK_IDENTIFIER |
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| { |
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| $$ = $1 |
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| } |
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| whereClause : WHERE expression |
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| { | { |
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| } | } |
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| propertyListOrStar |
selectList |
| : propertyList |
: '*' |
| { | { |
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| } | } |
| | '*' |
| propertyList |
| { | { |
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| } | } |
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| propertyList : property |
propertyList |
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: propertyName |
| { | { |
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| } | } |
| | propertyList ',' property |
| propertyList ',' propertyName |
| { | { |
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| } | } |
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| property |
selectExpression |
| : TOK_IDENTIFIER |
: fromClause whereClause |
| { | { |
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| } | } |
| | TOK_IDENTIFIER '.' TOK_IDENTIFIER |
| fromClause |
| { | { |
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| } | } |
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| expression |
fromClause |
| : expression OR expression |
: TOK_FROM className |
| { | { |
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| } | } |
| | expression AND expression |
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| { |
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| } |
whereClause |
| | NOT expression |
: TOK_WHERE searchCondition |
| { | { |
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| } | } |
| | '(' expression ')' |
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| { |
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| } |
searchCondition |
| | expressionTerm |
: searchCondition TOK_OR searchCondition |
| { | { |
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| } | } |
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| searchCondition TOK_AND searchCondition |
| expressionTerm |
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| : property LT constant |
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| { | { |
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| } | } |
| | property GT constant |
| TOK_NOT searchCondition |
| { | { |
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| } | } |
| | property LE constant |
| '(' searchCondition ')' |
| { | { |
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| } | } |
| | property GE constant |
| predicate |
| { | { |
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| } | } |
| | property EQ constant |
| predicate TOK_IS truthValue |
| { | { |
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| } | } |
| | property NE constant |
| predicate TOK_IS TOK_NOT truthValue |
| { | { |
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| } | } |
| | constant LT property |
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| { |
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| } |
predicate |
| | constant GT property |
: comparisonPredicate |
| { | { |
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| } | } |
| | constant LE property |
| nullPredicate |
| { | { |
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| } | } |
| | constant GE property |
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| { |
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| } |
comparisonPredicate |
| | constant EQ property |
: comparisonTerm TOK_LT comparisonTerm |
| { | { |
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| } | } |
| | constant NE property |
| comparisonTerm TOK_GT comparisonTerm |
| { | { |
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| } | } |
| | function LT constant |
| comparisonTerm TOK_LE comparisonTerm |
| { | { |
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| } | } |
| | function GT constant |
| comparisonTerm TOK_GE comparisonTerm |
| { | { |
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| } | } |
| | function LE constant |
| comparisonTerm TOK_EQ comparisonTerm |
| { | { |
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| } | } |
| | function GE constant |
| comparisonTerm TOK_NE comparisonTerm |
| { | { |
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| } | } |
| | function EQ constant |
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| { |
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| } |
nullPredicate |
| | function NE constant |
: comparisonTerm TOK_IS TOK_NULL |
| { | { |
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| } | } |
| | constant LT function |
| comparisonTerm TOK_IS TOK_NOT TOK_NULL |
| { | { |
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| } | } |
| | constant GT function |
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| { |
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| } |
truthValue |
| | constant LE function |
: TOK_TRUE |
| { |
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| } |
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| | constant GE function |
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| { | { |
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| } | } |
| | constant EQ function |
| TOK_FALSE |
| { | { |
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| } | } |
| | constant NE function |
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| { |
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| } |
propertyName |
| | className ISA className |
: TOK_IDENTIFIER |
| { | { |
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| } | } |
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| function |
className : TOK_IDENTIFIER |
| : TOK_IDENTIFIER '(' ')' |
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| { |
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| } |
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| | TOK_IDENTIFIER '(' functionParameterList ')' |
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| { | { |
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| } | } |
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| functionParameterList |
comparisonTerm |
| : functionParameter |
: propertyName |
| { | { |
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| } | } |
| | functionParameterList ',' functionParameter |
| TOK_INTEGER |
| { | { |
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| } | } |
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| TOK_DOUBLE |
| functionParameter |
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| : property |
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| | constant |
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| | function |
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| ; |
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| constant |
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| : TOK_INTEGER |
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| { | { |
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| } | } |
| | TOK_DOUBLE |
| TOK_STRING |
| { | { |
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| } | } |
| | STRING_LITERAL |
| truthValue |
| { | { |
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| } | } |
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| %% | %% |
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