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193 changes: 98 additions & 95 deletions lib/grammar.js
Original file line number Diff line number Diff line change
@@ -1,106 +1,109 @@
var dict = require('./dict');
var fs = require('fs');
var grammar = {

lex: {

macros: {
esc: "\\\\",
int: dict.integer
},

rules: [
["\\$", "return 'DOLLAR'"],
["\\.\\.", "return 'DOT_DOT'"],
["\\.", "return 'DOT'"],
["\\*", "return 'STAR'"],
[dict.identifier, "return 'IDENTIFIER'"],
["\\[", "return '['"],
["\\]", "return ']'"],
[",", "return ','"],
["({int})?\\:({int})?(\\:({int})?)?", "return 'ARRAY_SLICE'"],
["{int}", "return 'INTEGER'"],
[dict.qq_string, "yytext = yytext.substr(1,yyleng-2); return 'QQ_STRING';"],
[dict.q_string, "yytext = yytext.substr(1,yyleng-2); return 'Q_STRING';"],
["\\(.+?\\)(?=\\])", "return 'SCRIPT_EXPRESSION'"],
["\\?\\(.+?\\)(?=\\])", "return 'FILTER_EXPRESSION'"]
]
},

start: "JSON_PATH",

bnf: {

JSON_PATH: [
[ 'DOLLAR', 'yy.ast.set({ expression: { type: "root", value: $1 } }); yy.ast.unshift(); return yy.ast.yield()' ],
[ 'DOLLAR PATH_COMPONENTS', 'yy.ast.set({ expression: { type: "root", value: $1 } }); yy.ast.unshift(); return yy.ast.yield()' ],
[ 'LEADING_CHILD_MEMBER_EXPRESSION', 'yy.ast.unshift(); return yy.ast.yield()' ],
[ 'LEADING_CHILD_MEMBER_EXPRESSION PATH_COMPONENTS', 'yy.ast.set({ operation: "member", scope: "child", expression: { type: "identifier", value: $1 }}); yy.ast.unshift(); return yy.ast.yield()' ] ],

PATH_COMPONENTS: [
[ 'PATH_COMPONENT', '' ],
[ 'PATH_COMPONENTS PATH_COMPONENT', '' ] ],

PATH_COMPONENT: [
[ 'MEMBER_COMPONENT', 'yy.ast.set({ operation: "member" }); yy.ast.push()' ],
[ 'SUBSCRIPT_COMPONENT', 'yy.ast.set({ operation: "subscript" }); yy.ast.push() ' ] ],

MEMBER_COMPONENT: [
[ 'CHILD_MEMBER_COMPONENT', 'yy.ast.set({ scope: "child" })' ],
[ 'DESCENDANT_MEMBER_COMPONENT', 'yy.ast.set({ scope: "descendant" })' ] ],

CHILD_MEMBER_COMPONENT: [
[ 'DOT MEMBER_EXPRESSION', '' ] ],
var moduleJs = require('../include/module');
var action = require('../include/action');

LEADING_CHILD_MEMBER_EXPRESSION: [
[ 'MEMBER_EXPRESSION', 'yy.ast.set({ scope: "child", operation: "member" })' ] ],

DESCENDANT_MEMBER_COMPONENT: [
[ 'DOT_DOT MEMBER_EXPRESSION', '' ] ],

MEMBER_EXPRESSION: [
[ 'STAR', 'yy.ast.set({ expression: { type: "wildcard", value: $1 } })' ],
[ 'IDENTIFIER', 'yy.ast.set({ expression: { type: "identifier", value: $1 } })' ],
[ 'SCRIPT_EXPRESSION', 'yy.ast.set({ expression: { type: "script_expression", value: $1 } })' ],
[ 'INTEGER', 'yy.ast.set({ expression: { type: "numeric_literal", value: parseInt($1) } })' ],
[ 'END', '' ] ],

SUBSCRIPT_COMPONENT: [
[ 'CHILD_SUBSCRIPT_COMPONENT', 'yy.ast.set({ scope: "child" })' ],
[ 'DESCENDANT_SUBSCRIPT_COMPONENT', 'yy.ast.set({ scope: "descendant" })' ] ],

CHILD_SUBSCRIPT_COMPONENT: [
[ '[ SUBSCRIPT ]', '' ] ],

DESCENDANT_SUBSCRIPT_COMPONENT: [
[ 'DOT_DOT [ SUBSCRIPT ]', '' ] ],

SUBSCRIPT: [
[ 'SUBSCRIPT_EXPRESSION', '' ],
[ 'SUBSCRIPT_EXPRESSION_LIST', '$1.length > 1? yy.ast.set({ expression: { type: "union", value: $1 } }) : $$ = $1' ] ],

SUBSCRIPT_EXPRESSION_LIST: [
[ 'SUBSCRIPT_EXPRESSION_LISTABLE', '$$ = [$1]'],
[ 'SUBSCRIPT_EXPRESSION_LIST , SUBSCRIPT_EXPRESSION_LISTABLE', '$$ = $1.concat($3)' ] ],
var grammar = {

SUBSCRIPT_EXPRESSION_LISTABLE: [
[ 'INTEGER', '$$ = { expression: { type: "numeric_literal", value: parseInt($1) } }; yy.ast.set($$)' ],
[ 'STRING_LITERAL', '$$ = { expression: { type: "string_literal", value: $1 } }; yy.ast.set($$)' ],
[ 'ARRAY_SLICE', '$$ = { expression: { type: "slice", value: $1 } }; yy.ast.set($$)' ] ],
lex: {

SUBSCRIPT_EXPRESSION: [
[ 'STAR', '$$ = { expression: { type: "wildcard", value: $1 } }; yy.ast.set($$)' ],
[ 'SCRIPT_EXPRESSION', '$$ = { expression: { type: "script_expression", value: $1 } }; yy.ast.set($$)' ],
[ 'FILTER_EXPRESSION', '$$ = { expression: { type: "filter_expression", value: $1 } }; yy.ast.set($$)' ] ],
macros: {
esc: "\\\\",
int: dict.integer
},

STRING_LITERAL: [
[ 'QQ_STRING', "$$ = $1" ],
[ 'Q_STRING', "$$ = $1" ] ]
}
rules: [
["\\$", "return 'DOLLAR'"],
["\\.\\.", "return 'DOT_DOT'"],
["\\.", "return 'DOT'"],
["\\*", "return 'STAR'"],
[dict.identifier, "return 'IDENTIFIER'"],
["\\[", "return '['"],
["\\]", "return ']'"],
[",", "return ','"],
["({int})?\\:({int})?(\\:({int})?)?", "return 'ARRAY_SLICE'"],
["{int}", "return 'INTEGER'"],
[dict.qq_string, "yytext = yytext.substr(1,yyleng-2); return 'QQ_STRING';"],
[dict.q_string, "yytext = yytext.substr(1,yyleng-2); return 'Q_STRING';"],
["\\(.+?\\)(?=\\])", "return 'SCRIPT_EXPRESSION'"],
["\\?\\(.+?\\)(?=\\])", "return 'FILTER_EXPRESSION'"]
]
},

start: "JSON_PATH",

bnf: {

JSON_PATH: [
['DOLLAR', 'yy.ast.set({ expression: { type: "root", value: $1 } }); yy.ast.unshift(); return yy.ast.yield()'],
['DOLLAR PATH_COMPONENTS', 'yy.ast.set({ expression: { type: "root", value: $1 } }); yy.ast.unshift(); return yy.ast.yield()'],
['LEADING_CHILD_MEMBER_EXPRESSION', 'yy.ast.unshift(); return yy.ast.yield()'],
['LEADING_CHILD_MEMBER_EXPRESSION PATH_COMPONENTS', 'yy.ast.set({ operation: "member", scope: "child", expression: { type: "identifier", value: $1 }}); yy.ast.unshift(); return yy.ast.yield()']],

PATH_COMPONENTS: [
['PATH_COMPONENT', ''],
['PATH_COMPONENTS PATH_COMPONENT', '']],

PATH_COMPONENT: [
['MEMBER_COMPONENT', 'yy.ast.set({ operation: "member" }); yy.ast.push()'],
['SUBSCRIPT_COMPONENT', 'yy.ast.set({ operation: "subscript" }); yy.ast.push() ']],

MEMBER_COMPONENT: [
['CHILD_MEMBER_COMPONENT', 'yy.ast.set({ scope: "child" })'],
['DESCENDANT_MEMBER_COMPONENT', 'yy.ast.set({ scope: "descendant" })']],

CHILD_MEMBER_COMPONENT: [
['DOT MEMBER_EXPRESSION', '']],

LEADING_CHILD_MEMBER_EXPRESSION: [
['MEMBER_EXPRESSION', 'yy.ast.set({ scope: "child", operation: "member" })']],

DESCENDANT_MEMBER_COMPONENT: [
['DOT_DOT MEMBER_EXPRESSION', '']],

MEMBER_EXPRESSION: [
['STAR', 'yy.ast.set({ expression: { type: "wildcard", value: $1 } })'],
['IDENTIFIER', 'yy.ast.set({ expression: { type: "identifier", value: $1 } })'],
['SCRIPT_EXPRESSION', 'yy.ast.set({ expression: { type: "script_expression", value: $1 } })'],
['INTEGER', 'yy.ast.set({ expression: { type: "numeric_literal", value: parseInt($1) } })'],
['END', '']],

SUBSCRIPT_COMPONENT: [
['CHILD_SUBSCRIPT_COMPONENT', 'yy.ast.set({ scope: "child" })'],
['DESCENDANT_SUBSCRIPT_COMPONENT', 'yy.ast.set({ scope: "descendant" })']],

CHILD_SUBSCRIPT_COMPONENT: [
['[ SUBSCRIPT ]', '']],

DESCENDANT_SUBSCRIPT_COMPONENT: [
['DOT_DOT [ SUBSCRIPT ]', '']],

SUBSCRIPT: [
['SUBSCRIPT_EXPRESSION', ''],
['SUBSCRIPT_EXPRESSION_LIST', '$1.length > 1? yy.ast.set({ expression: { type: "union", value: $1 } }) : $$ = $1']],

SUBSCRIPT_EXPRESSION_LIST: [
['SUBSCRIPT_EXPRESSION_LISTABLE', '$$ = [$1]'],
['SUBSCRIPT_EXPRESSION_LIST , SUBSCRIPT_EXPRESSION_LISTABLE', '$$ = $1.concat($3)']],

SUBSCRIPT_EXPRESSION_LISTABLE: [
['INTEGER', '$$ = { expression: { type: "numeric_literal", value: parseInt($1) } }; yy.ast.set($$)'],
['STRING_LITERAL', '$$ = { expression: { type: "string_literal", value: $1 } }; yy.ast.set($$)'],
['ARRAY_SLICE', '$$ = { expression: { type: "slice", value: $1 } }; yy.ast.set($$)']],

SUBSCRIPT_EXPRESSION: [
['STAR', '$$ = { expression: { type: "wildcard", value: $1 } }; yy.ast.set($$)'],
['SCRIPT_EXPRESSION', '$$ = { expression: { type: "script_expression", value: $1 } }; yy.ast.set($$)'],
['FILTER_EXPRESSION', '$$ = { expression: { type: "filter_expression", value: $1 } }; yy.ast.set($$)']],

STRING_LITERAL: [
['QQ_STRING', "$$ = $1"],
['Q_STRING', "$$ = $1"]]
}
};
if (fs.readFileSync) {
grammar.moduleInclude = fs.readFileSync(require.resolve("../include/module.js"));
grammar.actionInclude = fs.readFileSync(require.resolve("../include/action.js"));
grammar.moduleInclude = fs.readFileSync(moduleJs);
grammar.actionInclude = fs.readFileSync(action);
}

module.exports = grammar;
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