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kubesphere/vendor/github.com/open-policy-agent/opa/ast/parser.go
hongming 9769357005 update 
Signed-off-by: hongming <talonwan@yunify.com>
2020-03-20 02:16:11 +08:00

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// Code generated by pigeon; DO NOT EDIT.
package ast
import (
"bytes"
"errors"
"fmt"
"io"
"io/ioutil"
"math"
"os"
"sort"
"strconv"
"strings"
"unicode"
"unicode/utf8"
)
var g = &grammar{
rules: []*rule{
{
name: "Program",
pos: position{line: 5, col: 1, offset: 17},
expr: &actionExpr{
pos: position{line: 5, col: 12, offset: 28},
run: (*parser).callonProgram1,
expr: &seqExpr{
pos: position{line: 5, col: 12, offset: 28},
exprs: []interface{}{
&ruleRefExpr{
pos: position{line: 5, col: 12, offset: 28},
name: "_",
},
&labeledExpr{
pos: position{line: 5, col: 14, offset: 30},
label: "vals",
expr: &zeroOrOneExpr{
pos: position{line: 5, col: 19, offset: 35},
expr: &seqExpr{
pos: position{line: 5, col: 20, offset: 36},
exprs: []interface{}{
&ruleRefExpr{
pos: position{line: 5, col: 20, offset: 36},
name: "Stmt",
},
&zeroOrMoreExpr{
pos: position{line: 5, col: 25, offset: 41},
expr: &seqExpr{
pos: position{line: 5, col: 26, offset: 42},
exprs: []interface{}{
&ruleRefExpr{
pos: position{line: 5, col: 26, offset: 42},
name: "ws",
},
&ruleRefExpr{
pos: position{line: 5, col: 29, offset: 45},
name: "Stmt",
},
},
},
},
},
},
},
},
&ruleRefExpr{
pos: position{line: 5, col: 38, offset: 54},
name: "_",
},
&ruleRefExpr{
pos: position{line: 5, col: 40, offset: 56},
name: "EOF",
},
},
},
},
},
{
name: "Stmt",
pos: position{line: 9, col: 1, offset: 97},
expr: &actionExpr{
pos: position{line: 9, col: 9, offset: 105},
run: (*parser).callonStmt1,
expr: &labeledExpr{
pos: position{line: 9, col: 9, offset: 105},
label: "val",
expr: &choiceExpr{
pos: position{line: 9, col: 14, offset: 110},
alternatives: []interface{}{
&ruleRefExpr{
pos: position{line: 9, col: 14, offset: 110},
name: "Package",
},
&ruleRefExpr{
pos: position{line: 9, col: 24, offset: 120},
name: "Import",
},
&ruleRefExpr{
pos: position{line: 9, col: 33, offset: 129},
name: "Rules",
},
&ruleRefExpr{
pos: position{line: 9, col: 41, offset: 137},
name: "Body",
},
&ruleRefExpr{
pos: position{line: 9, col: 48, offset: 144},
name: "Comment",
},
},
},
},
},
},
{
name: "Package",
pos: position{line: 13, col: 1, offset: 178},
expr: &actionExpr{
pos: position{line: 13, col: 12, offset: 189},
run: (*parser).callonPackage1,
expr: &seqExpr{
pos: position{line: 13, col: 12, offset: 189},
exprs: []interface{}{
&litMatcher{
pos: position{line: 13, col: 12, offset: 189},
val: "package",
ignoreCase: false,
},
&ruleRefExpr{
pos: position{line: 13, col: 22, offset: 199},
name: "ws",
},
&labeledExpr{
pos: position{line: 13, col: 25, offset: 202},
label: "val",
expr: &choiceExpr{
pos: position{line: 13, col: 30, offset: 207},
alternatives: []interface{}{
&ruleRefExpr{
pos: position{line: 13, col: 30, offset: 207},
name: "Ref",
},
&ruleRefExpr{
pos: position{line: 13, col: 36, offset: 213},
name: "Var",
},
},
},
},
},
},
},
},
{
name: "Import",
pos: position{line: 17, col: 1, offset: 271},
expr: &actionExpr{
pos: position{line: 17, col: 11, offset: 281},
run: (*parser).callonImport1,
expr: &seqExpr{
pos: position{line: 17, col: 11, offset: 281},
exprs: []interface{}{
&litMatcher{
pos: position{line: 17, col: 11, offset: 281},
val: "import",
ignoreCase: false,
},
&ruleRefExpr{
pos: position{line: 17, col: 20, offset: 290},
name: "ws",
},
&labeledExpr{
pos: position{line: 17, col: 23, offset: 293},
label: "path",
expr: &choiceExpr{
pos: position{line: 17, col: 29, offset: 299},
alternatives: []interface{}{
&ruleRefExpr{
pos: position{line: 17, col: 29, offset: 299},
name: "Ref",
},
&ruleRefExpr{
pos: position{line: 17, col: 35, offset: 305},
name: "Var",
},
},
},
},
&labeledExpr{
pos: position{line: 17, col: 40, offset: 310},
label: "alias",
expr: &zeroOrOneExpr{
pos: position{line: 17, col: 46, offset: 316},
expr: &seqExpr{
pos: position{line: 17, col: 47, offset: 317},
exprs: []interface{}{
&ruleRefExpr{
pos: position{line: 17, col: 47, offset: 317},
name: "ws",
},
&litMatcher{
pos: position{line: 17, col: 50, offset: 320},
val: "as",
ignoreCase: false,
},
&ruleRefExpr{
pos: position{line: 17, col: 55, offset: 325},
name: "ws",
},
&ruleRefExpr{
pos: position{line: 17, col: 58, offset: 328},
name: "Var",
},
},
},
},
},
},
},
},
},
{
name: "Rules",
pos: position{line: 21, col: 1, offset: 394},
expr: &choiceExpr{
pos: position{line: 21, col: 10, offset: 403},
alternatives: []interface{}{
&ruleRefExpr{
pos: position{line: 21, col: 10, offset: 403},
name: "DefaultRules",
},
&ruleRefExpr{
pos: position{line: 21, col: 25, offset: 418},
name: "NormalRules",
},
},
},
},
{
name: "DefaultRules",
pos: position{line: 23, col: 1, offset: 431},
expr: &actionExpr{
pos: position{line: 23, col: 17, offset: 447},
run: (*parser).callonDefaultRules1,
expr: &seqExpr{
pos: position{line: 23, col: 17, offset: 447},
exprs: []interface{}{
&litMatcher{
pos: position{line: 23, col: 17, offset: 447},
val: "default",
ignoreCase: false,
},
&ruleRefExpr{
pos: position{line: 23, col: 27, offset: 457},
name: "ws",
},
&labeledExpr{
pos: position{line: 23, col: 30, offset: 460},
label: "name",
expr: &ruleRefExpr{
pos: position{line: 23, col: 35, offset: 465},
name: "Var",
},
},
&ruleRefExpr{
pos: position{line: 23, col: 39, offset: 469},
name: "_",
},
&labeledExpr{
pos: position{line: 23, col: 41, offset: 471},
label: "operator",
expr: &choiceExpr{
pos: position{line: 23, col: 52, offset: 482},
alternatives: []interface{}{
&litMatcher{
pos: position{line: 23, col: 52, offset: 482},
val: ":=",
ignoreCase: false,
},
&litMatcher{
pos: position{line: 23, col: 59, offset: 489},
val: "=",
ignoreCase: false,
},
},
},
},
&ruleRefExpr{
pos: position{line: 23, col: 65, offset: 495},
name: "_",
},
&labeledExpr{
pos: position{line: 23, col: 67, offset: 497},
label: "value",
expr: &ruleRefExpr{
pos: position{line: 23, col: 73, offset: 503},
name: "Term",
},
},
},
},
},
},
{
name: "NormalRules",
pos: position{line: 27, col: 1, offset: 583},
expr: &actionExpr{
pos: position{line: 27, col: 16, offset: 598},
run: (*parser).callonNormalRules1,
expr: &seqExpr{
pos: position{line: 27, col: 16, offset: 598},
exprs: []interface{}{
&labeledExpr{
pos: position{line: 27, col: 16, offset: 598},
label: "head",
expr: &choiceExpr{
pos: position{line: 27, col: 22, offset: 604},
alternatives: []interface{}{
&ruleRefExpr{
pos: position{line: 27, col: 22, offset: 604},
name: "PartialRuleHead",
},
&ruleRefExpr{
pos: position{line: 27, col: 40, offset: 622},
name: "RuleHead",
},
},
},
},
&ruleRefExpr{
pos: position{line: 27, col: 50, offset: 632},
name: "_",
},
&labeledExpr{
pos: position{line: 27, col: 52, offset: 634},
label: "rest",
expr: &seqExpr{
pos: position{line: 27, col: 58, offset: 640},
exprs: []interface{}{
&ruleRefExpr{
pos: position{line: 27, col: 58, offset: 640},
name: "NonEmptyBraceEnclosedBody",
},
&zeroOrMoreExpr{
pos: position{line: 27, col: 84, offset: 666},
expr: &seqExpr{
pos: position{line: 27, col: 86, offset: 668},
exprs: []interface{}{
&ruleRefExpr{
pos: position{line: 27, col: 86, offset: 668},
name: "_",
},
&ruleRefExpr{
pos: position{line: 27, col: 88, offset: 670},
name: "RuleExt",
},
},
},
},
},
},
},
},
},
},
},
{
name: "PartialRuleHead",
pos: position{line: 31, col: 1, offset: 739},
expr: &actionExpr{
pos: position{line: 31, col: 20, offset: 758},
run: (*parser).callonPartialRuleHead1,
expr: &seqExpr{
pos: position{line: 31, col: 20, offset: 758},
exprs: []interface{}{
&labeledExpr{
pos: position{line: 31, col: 20, offset: 758},
label: "name",
expr: &ruleRefExpr{
pos: position{line: 31, col: 25, offset: 763},
name: "Var",
},
},
&labeledExpr{
pos: position{line: 31, col: 29, offset: 767},
label: "args",
expr: &seqExpr{
pos: position{line: 31, col: 36, offset: 774},
exprs: []interface{}{
&ruleRefExpr{
pos: position{line: 31, col: 36, offset: 774},
name: "_",
},
&litMatcher{
pos: position{line: 31, col: 38, offset: 776},
val: "(",
ignoreCase: false,
},
&ruleRefExpr{
pos: position{line: 31, col: 42, offset: 780},
name: "_",
},
&ruleRefExpr{
pos: position{line: 31, col: 44, offset: 782},
name: "Args",
},
&ruleRefExpr{
pos: position{line: 31, col: 49, offset: 787},
name: "_",
},
&litMatcher{
pos: position{line: 31, col: 51, offset: 789},
val: ")",
ignoreCase: false,
},
&ruleRefExpr{
pos: position{line: 31, col: 55, offset: 793},
name: "_",
},
},
},
},
&labeledExpr{
pos: position{line: 31, col: 59, offset: 797},
label: "value",
expr: &zeroOrOneExpr{
pos: position{line: 31, col: 65, offset: 803},
expr: &seqExpr{
pos: position{line: 31, col: 67, offset: 805},
exprs: []interface{}{
&ruleRefExpr{
pos: position{line: 31, col: 67, offset: 805},
name: "_",
},
&choiceExpr{
pos: position{line: 31, col: 71, offset: 809},
alternatives: []interface{}{
&litMatcher{
pos: position{line: 31, col: 71, offset: 809},
val: ":=",
ignoreCase: false,
},
&litMatcher{
pos: position{line: 31, col: 78, offset: 816},
val: "=",
ignoreCase: false,
},
},
},
&ruleRefExpr{
pos: position{line: 31, col: 84, offset: 822},
name: "_",
},
&ruleRefExpr{
pos: position{line: 31, col: 86, offset: 824},
name: "ExprTerm",
},
},
},
},
},
},
},
},
},
{
name: "RuleHead",
pos: position{line: 35, col: 1, offset: 909},
expr: &actionExpr{
pos: position{line: 35, col: 13, offset: 921},
run: (*parser).callonRuleHead1,
expr: &seqExpr{
pos: position{line: 35, col: 13, offset: 921},
exprs: []interface{}{
&labeledExpr{
pos: position{line: 35, col: 13, offset: 921},
label: "name",
expr: &ruleRefExpr{
pos: position{line: 35, col: 18, offset: 926},
name: "Var",
},
},
&labeledExpr{
pos: position{line: 35, col: 22, offset: 930},
label: "key",
expr: &zeroOrOneExpr{
pos: position{line: 35, col: 26, offset: 934},
expr: &seqExpr{
pos: position{line: 35, col: 28, offset: 936},
exprs: []interface{}{
&ruleRefExpr{
pos: position{line: 35, col: 28, offset: 936},
name: "_",
},
&litMatcher{
pos: position{line: 35, col: 30, offset: 938},
val: "[",
ignoreCase: false,
},
&ruleRefExpr{
pos: position{line: 35, col: 34, offset: 942},
name: "_",
},
&ruleRefExpr{
pos: position{line: 35, col: 36, offset: 944},
name: "ExprTerm",
},
&ruleRefExpr{
pos: position{line: 35, col: 45, offset: 953},
name: "_",
},
&litMatcher{
pos: position{line: 35, col: 47, offset: 955},
val: "]",
ignoreCase: false,
},
&ruleRefExpr{
pos: position{line: 35, col: 51, offset: 959},
name: "_",
},
},
},
},
},
&labeledExpr{
pos: position{line: 35, col: 56, offset: 964},
label: "value",
expr: &zeroOrOneExpr{
pos: position{line: 35, col: 62, offset: 970},
expr: &seqExpr{
pos: position{line: 35, col: 64, offset: 972},
exprs: []interface{}{
&ruleRefExpr{
pos: position{line: 35, col: 64, offset: 972},
name: "_",
},
&choiceExpr{
pos: position{line: 35, col: 68, offset: 976},
alternatives: []interface{}{
&litMatcher{
pos: position{line: 35, col: 68, offset: 976},
val: ":=",
ignoreCase: false,
},
&litMatcher{
pos: position{line: 35, col: 75, offset: 983},
val: "=",
ignoreCase: false,
},
},
},
&ruleRefExpr{
pos: position{line: 35, col: 81, offset: 989},
name: "_",
},
&ruleRefExpr{
pos: position{line: 35, col: 83, offset: 991},
name: "ExprTerm",
},
},
},
},
},
},
},
},
},
{
name: "Args",
pos: position{line: 39, col: 1, offset: 1075},
expr: &actionExpr{
pos: position{line: 39, col: 9, offset: 1083},
run: (*parser).callonArgs1,
expr: &labeledExpr{
pos: position{line: 39, col: 9, offset: 1083},
label: "list",
expr: &ruleRefExpr{
pos: position{line: 39, col: 14, offset: 1088},
name: "ExprTermList",
},
},
},
},
{
name: "Else",
pos: position{line: 43, col: 1, offset: 1132},
expr: &actionExpr{
pos: position{line: 43, col: 9, offset: 1140},
run: (*parser).callonElse1,
expr: &seqExpr{
pos: position{line: 43, col: 9, offset: 1140},
exprs: []interface{}{
&litMatcher{
pos: position{line: 43, col: 9, offset: 1140},
val: "else",
ignoreCase: false,
},
&labeledExpr{
pos: position{line: 43, col: 16, offset: 1147},
label: "value",
expr: &zeroOrOneExpr{
pos: position{line: 43, col: 22, offset: 1153},
expr: &seqExpr{
pos: position{line: 43, col: 24, offset: 1155},
exprs: []interface{}{
&ruleRefExpr{
pos: position{line: 43, col: 24, offset: 1155},
name: "_",
},
&litMatcher{
pos: position{line: 43, col: 26, offset: 1157},
val: "=",
ignoreCase: false,
},
&ruleRefExpr{
pos: position{line: 43, col: 30, offset: 1161},
name: "_",
},
&ruleRefExpr{
pos: position{line: 43, col: 32, offset: 1163},
name: "Term",
},
},
},
},
},
&labeledExpr{
pos: position{line: 43, col: 40, offset: 1171},
label: "body",
expr: &seqExpr{
pos: position{line: 43, col: 47, offset: 1178},
exprs: []interface{}{
&ruleRefExpr{
pos: position{line: 43, col: 47, offset: 1178},
name: "_",
},
&ruleRefExpr{
pos: position{line: 43, col: 49, offset: 1180},
name: "NonEmptyBraceEnclosedBody",
},
},
},
},
},
},
},
},
{
name: "RuleDup",
pos: position{line: 47, col: 1, offset: 1269},
expr: &actionExpr{
pos: position{line: 47, col: 12, offset: 1280},
run: (*parser).callonRuleDup1,
expr: &labeledExpr{
pos: position{line: 47, col: 12, offset: 1280},
label: "b",
expr: &ruleRefExpr{
pos: position{line: 47, col: 14, offset: 1282},
name: "NonEmptyBraceEnclosedBody",
},
},
},
},
{
name: "RuleExt",
pos: position{line: 51, col: 1, offset: 1378},
expr: &choiceExpr{
pos: position{line: 51, col: 12, offset: 1389},
alternatives: []interface{}{
&ruleRefExpr{
pos: position{line: 51, col: 12, offset: 1389},
name: "Else",
},
&ruleRefExpr{
pos: position{line: 51, col: 19, offset: 1396},
name: "RuleDup",
},
},
},
},
{
name: "Body",
pos: position{line: 53, col: 1, offset: 1405},
expr: &choiceExpr{
pos: position{line: 53, col: 9, offset: 1413},
alternatives: []interface{}{
&ruleRefExpr{
pos: position{line: 53, col: 9, offset: 1413},
name: "NonWhitespaceBody",
},
&ruleRefExpr{
pos: position{line: 53, col: 29, offset: 1433},
name: "BraceEnclosedBody",
},
},
},
},
{
name: "NonEmptyBraceEnclosedBody",
pos: position{line: 55, col: 1, offset: 1452},
expr: &actionExpr{
pos: position{line: 55, col: 30, offset: 1481},
run: (*parser).callonNonEmptyBraceEnclosedBody1,
expr: &seqExpr{
pos: position{line: 55, col: 30, offset: 1481},
exprs: []interface{}{
&litMatcher{
pos: position{line: 55, col: 30, offset: 1481},
val: "{",
ignoreCase: false,
},
&ruleRefExpr{
pos: position{line: 55, col: 34, offset: 1485},
name: "_",
},
&labeledExpr{
pos: position{line: 55, col: 36, offset: 1487},
label: "val",
expr: &zeroOrOneExpr{
pos: position{line: 55, col: 40, offset: 1491},
expr: &ruleRefExpr{
pos: position{line: 55, col: 40, offset: 1491},
name: "WhitespaceBody",
},
},
},
&ruleRefExpr{
pos: position{line: 55, col: 56, offset: 1507},
name: "_",
},
&litMatcher{
pos: position{line: 55, col: 58, offset: 1509},
val: "}",
ignoreCase: false,
},
},
},
},
},
{
name: "BraceEnclosedBody",
pos: position{line: 62, col: 1, offset: 1621},
expr: &actionExpr{
pos: position{line: 62, col: 22, offset: 1642},
run: (*parser).callonBraceEnclosedBody1,
expr: &seqExpr{
pos: position{line: 62, col: 22, offset: 1642},
exprs: []interface{}{
&litMatcher{
pos: position{line: 62, col: 22, offset: 1642},
val: "{",
ignoreCase: false,
},
&ruleRefExpr{
pos: position{line: 62, col: 26, offset: 1646},
name: "_",
},
&labeledExpr{
pos: position{line: 62, col: 28, offset: 1648},
label: "val",
expr: &zeroOrOneExpr{
pos: position{line: 62, col: 32, offset: 1652},
expr: &ruleRefExpr{
pos: position{line: 62, col: 32, offset: 1652},
name: "WhitespaceBody",
},
},
},
&ruleRefExpr{
pos: position{line: 62, col: 48, offset: 1668},
name: "_",
},
&litMatcher{
pos: position{line: 62, col: 50, offset: 1670},
val: "}",
ignoreCase: false,
},
},
},
},
},
{
name: "WhitespaceBody",
pos: position{line: 66, col: 1, offset: 1737},
expr: &actionExpr{
pos: position{line: 66, col: 19, offset: 1755},
run: (*parser).callonWhitespaceBody1,
expr: &seqExpr{
pos: position{line: 66, col: 19, offset: 1755},
exprs: []interface{}{
&labeledExpr{
pos: position{line: 66, col: 19, offset: 1755},
label: "head",
expr: &ruleRefExpr{
pos: position{line: 66, col: 24, offset: 1760},
name: "Literal",
},
},
&labeledExpr{
pos: position{line: 66, col: 32, offset: 1768},
label: "tail",
expr: &zeroOrMoreExpr{
pos: position{line: 66, col: 37, offset: 1773},
expr: &seqExpr{
pos: position{line: 66, col: 38, offset: 1774},
exprs: []interface{}{
&ruleRefExpr{
pos: position{line: 66, col: 38, offset: 1774},
name: "WhitespaceLiteralSeparator",
},
&ruleRefExpr{
pos: position{line: 66, col: 65, offset: 1801},
name: "_",
},
&ruleRefExpr{
pos: position{line: 66, col: 67, offset: 1803},
name: "Literal",
},
},
},
},
},
},
},
},
},
{
name: "NonWhitespaceBody",
pos: position{line: 70, col: 1, offset: 1853},
expr: &actionExpr{
pos: position{line: 70, col: 22, offset: 1874},
run: (*parser).callonNonWhitespaceBody1,
expr: &seqExpr{
pos: position{line: 70, col: 22, offset: 1874},
exprs: []interface{}{
&labeledExpr{
pos: position{line: 70, col: 22, offset: 1874},
label: "head",
expr: &ruleRefExpr{
pos: position{line: 70, col: 27, offset: 1879},
name: "Literal",
},
},
&labeledExpr{
pos: position{line: 70, col: 35, offset: 1887},
label: "tail",
expr: &zeroOrMoreExpr{
pos: position{line: 70, col: 40, offset: 1892},
expr: &seqExpr{
pos: position{line: 70, col: 42, offset: 1894},
exprs: []interface{}{
&ruleRefExpr{
pos: position{line: 70, col: 42, offset: 1894},
name: "_",
},
&ruleRefExpr{
pos: position{line: 70, col: 44, offset: 1896},
name: "NonWhitespaceLiteralSeparator",
},
&ruleRefExpr{
pos: position{line: 70, col: 74, offset: 1926},
name: "_",
},
&ruleRefExpr{
pos: position{line: 70, col: 76, offset: 1928},
name: "Literal",
},
},
},
},
},
},
},
},
},
{
name: "WhitespaceLiteralSeparator",
pos: position{line: 74, col: 1, offset: 1978},
expr: &seqExpr{
pos: position{line: 74, col: 31, offset: 2008},
exprs: []interface{}{
&zeroOrMoreExpr{
pos: position{line: 74, col: 31, offset: 2008},
expr: &charClassMatcher{
pos: position{line: 74, col: 31, offset: 2008},
val: "[ \\t]",
chars: []rune{' ', '\t'},
ignoreCase: false,
inverted: false,
},
},
&choiceExpr{
pos: position{line: 74, col: 39, offset: 2016},
alternatives: []interface{}{
&seqExpr{
pos: position{line: 74, col: 40, offset: 2017},
exprs: []interface{}{
&ruleRefExpr{
pos: position{line: 74, col: 40, offset: 2017},
name: "NonWhitespaceLiteralSeparator",
},
&zeroOrOneExpr{
pos: position{line: 74, col: 70, offset: 2047},
expr: &ruleRefExpr{
pos: position{line: 74, col: 70, offset: 2047},
name: "Comment",
},
},
},
},
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{
name: "Fraction",
pos: position{line: 255, col: 1, offset: 6746},
expr: &seqExpr{
pos: position{line: 255, col: 13, offset: 6758},
exprs: []interface{}{
&litMatcher{
pos: position{line: 255, col: 13, offset: 6758},
val: ".",
ignoreCase: false,
},
&oneOrMoreExpr{
pos: position{line: 255, col: 17, offset: 6762},
expr: &ruleRefExpr{
pos: position{line: 255, col: 17, offset: 6762},
name: "DecimalDigit",
},
},
},
},
},
{
name: "Exponent",
pos: position{line: 257, col: 1, offset: 6777},
expr: &seqExpr{
pos: position{line: 257, col: 13, offset: 6789},
exprs: []interface{}{
&litMatcher{
pos: position{line: 257, col: 13, offset: 6789},
val: "e",
ignoreCase: true,
},
&zeroOrOneExpr{
pos: position{line: 257, col: 18, offset: 6794},
expr: &charClassMatcher{
pos: position{line: 257, col: 18, offset: 6794},
val: "[+-]",
chars: []rune{'+', '-'},
ignoreCase: false,
inverted: false,
},
},
&oneOrMoreExpr{
pos: position{line: 257, col: 24, offset: 6800},
expr: &ruleRefExpr{
pos: position{line: 257, col: 24, offset: 6800},
name: "DecimalDigit",
},
},
},
},
},
{
name: "Integer",
pos: position{line: 259, col: 1, offset: 6815},
expr: &choiceExpr{
pos: position{line: 259, col: 12, offset: 6826},
alternatives: []interface{}{
&litMatcher{
pos: position{line: 259, col: 12, offset: 6826},
val: "0",
ignoreCase: false,
},
&seqExpr{
pos: position{line: 259, col: 20, offset: 6834},
exprs: []interface{}{
&ruleRefExpr{
pos: position{line: 259, col: 20, offset: 6834},
name: "NonZeroDecimalDigit",
},
&zeroOrMoreExpr{
pos: position{line: 259, col: 40, offset: 6854},
expr: &ruleRefExpr{
pos: position{line: 259, col: 40, offset: 6854},
name: "DecimalDigit",
},
},
},
},
},
},
},
{
name: "String",
pos: position{line: 261, col: 1, offset: 6871},
expr: &choiceExpr{
pos: position{line: 261, col: 11, offset: 6881},
alternatives: []interface{}{
&ruleRefExpr{
pos: position{line: 261, col: 11, offset: 6881},
name: "QuotedString",
},
&ruleRefExpr{
pos: position{line: 261, col: 26, offset: 6896},
name: "RawString",
},
},
},
},
{
name: "QuotedString",
pos: position{line: 263, col: 1, offset: 6907},
expr: &choiceExpr{
pos: position{line: 263, col: 17, offset: 6923},
alternatives: []interface{}{
&actionExpr{
pos: position{line: 263, col: 17, offset: 6923},
run: (*parser).callonQuotedString2,
expr: &seqExpr{
pos: position{line: 263, col: 17, offset: 6923},
exprs: []interface{}{
&litMatcher{
pos: position{line: 263, col: 17, offset: 6923},
val: "\"",
ignoreCase: false,
},
&zeroOrMoreExpr{
pos: position{line: 263, col: 21, offset: 6927},
expr: &ruleRefExpr{
pos: position{line: 263, col: 21, offset: 6927},
name: "Char",
},
},
&litMatcher{
pos: position{line: 263, col: 27, offset: 6933},
val: "\"",
ignoreCase: false,
},
},
},
},
&actionExpr{
pos: position{line: 265, col: 5, offset: 6993},
run: (*parser).callonQuotedString8,
expr: &seqExpr{
pos: position{line: 265, col: 5, offset: 6993},
exprs: []interface{}{
&litMatcher{
pos: position{line: 265, col: 5, offset: 6993},
val: "\"",
ignoreCase: false,
},
&zeroOrMoreExpr{
pos: position{line: 265, col: 9, offset: 6997},
expr: &ruleRefExpr{
pos: position{line: 265, col: 9, offset: 6997},
name: "Char",
},
},
&notExpr{
pos: position{line: 265, col: 15, offset: 7003},
expr: &litMatcher{
pos: position{line: 265, col: 16, offset: 7004},
val: "\"",
ignoreCase: false,
},
},
},
},
},
},
},
},
{
name: "RawString",
pos: position{line: 269, col: 1, offset: 7084},
expr: &actionExpr{
pos: position{line: 269, col: 14, offset: 7097},
run: (*parser).callonRawString1,
expr: &seqExpr{
pos: position{line: 269, col: 14, offset: 7097},
exprs: []interface{}{
&litMatcher{
pos: position{line: 269, col: 14, offset: 7097},
val: "`",
ignoreCase: false,
},
&zeroOrMoreExpr{
pos: position{line: 269, col: 18, offset: 7101},
expr: &charClassMatcher{
pos: position{line: 269, col: 18, offset: 7101},
val: "[^`]",
chars: []rune{'`'},
ignoreCase: false,
inverted: true,
},
},
&litMatcher{
pos: position{line: 269, col: 24, offset: 7107},
val: "`",
ignoreCase: false,
},
},
},
},
},
{
name: "Bool",
pos: position{line: 273, col: 1, offset: 7169},
expr: &actionExpr{
pos: position{line: 273, col: 9, offset: 7177},
run: (*parser).callonBool1,
expr: &seqExpr{
pos: position{line: 273, col: 9, offset: 7177},
exprs: []interface{}{
&labeledExpr{
pos: position{line: 273, col: 9, offset: 7177},
label: "val",
expr: &choiceExpr{
pos: position{line: 273, col: 14, offset: 7182},
alternatives: []interface{}{
&litMatcher{
pos: position{line: 273, col: 14, offset: 7182},
val: "true",
ignoreCase: false,
},
&litMatcher{
pos: position{line: 273, col: 23, offset: 7191},
val: "false",
ignoreCase: false,
},
},
},
},
&notExpr{
pos: position{line: 273, col: 32, offset: 7200},
expr: &ruleRefExpr{
pos: position{line: 273, col: 33, offset: 7201},
name: "VarChar",
},
},
},
},
},
},
{
name: "Null",
pos: position{line: 277, col: 1, offset: 7262},
expr: &actionExpr{
pos: position{line: 277, col: 9, offset: 7270},
run: (*parser).callonNull1,
expr: &seqExpr{
pos: position{line: 277, col: 9, offset: 7270},
exprs: []interface{}{
&litMatcher{
pos: position{line: 277, col: 9, offset: 7270},
val: "null",
ignoreCase: false,
},
&notExpr{
pos: position{line: 277, col: 16, offset: 7277},
expr: &ruleRefExpr{
pos: position{line: 277, col: 17, offset: 7278},
name: "VarChar",
},
},
},
},
},
},
{
name: "VarStart",
pos: position{line: 281, col: 1, offset: 7331},
expr: &ruleRefExpr{
pos: position{line: 281, col: 13, offset: 7343},
name: "AsciiLetter",
},
},
{
name: "VarChar",
pos: position{line: 283, col: 1, offset: 7356},
expr: &choiceExpr{
pos: position{line: 283, col: 12, offset: 7367},
alternatives: []interface{}{
&ruleRefExpr{
pos: position{line: 283, col: 12, offset: 7367},
name: "AsciiLetter",
},
&ruleRefExpr{
pos: position{line: 283, col: 26, offset: 7381},
name: "DecimalDigit",
},
},
},
},
{
name: "AsciiLetter",
pos: position{line: 285, col: 1, offset: 7395},
expr: &charClassMatcher{
pos: position{line: 285, col: 16, offset: 7410},
val: "[A-Za-z_]",
chars: []rune{'_'},
ranges: []rune{'A', 'Z', 'a', 'z'},
ignoreCase: false,
inverted: false,
},
},
{
name: "Char",
pos: position{line: 287, col: 1, offset: 7421},
expr: &choiceExpr{
pos: position{line: 287, col: 9, offset: 7429},
alternatives: []interface{}{
&seqExpr{
pos: position{line: 287, col: 11, offset: 7431},
exprs: []interface{}{
&notExpr{
pos: position{line: 287, col: 11, offset: 7431},
expr: &ruleRefExpr{
pos: position{line: 287, col: 12, offset: 7432},
name: "EscapedChar",
},
},
&anyMatcher{
line: 287, col: 24, offset: 7444,
},
},
},
&seqExpr{
pos: position{line: 287, col: 32, offset: 7452},
exprs: []interface{}{
&litMatcher{
pos: position{line: 287, col: 32, offset: 7452},
val: "\\",
ignoreCase: false,
},
&ruleRefExpr{
pos: position{line: 287, col: 37, offset: 7457},
name: "EscapeSequence",
},
},
},
},
},
},
{
name: "EscapedChar",
pos: position{line: 289, col: 1, offset: 7475},
expr: &charClassMatcher{
pos: position{line: 289, col: 16, offset: 7490},
val: "[\\x00-\\x1f\"\\\\]",
chars: []rune{'"', '\\'},
ranges: []rune{'\x00', '\x1f'},
ignoreCase: false,
inverted: false,
},
},
{
name: "EscapeSequence",
pos: position{line: 291, col: 1, offset: 7506},
expr: &choiceExpr{
pos: position{line: 291, col: 19, offset: 7524},
alternatives: []interface{}{
&ruleRefExpr{
pos: position{line: 291, col: 19, offset: 7524},
name: "SingleCharEscape",
},
&ruleRefExpr{
pos: position{line: 291, col: 38, offset: 7543},
name: "UnicodeEscape",
},
},
},
},
{
name: "SingleCharEscape",
pos: position{line: 293, col: 1, offset: 7558},
expr: &charClassMatcher{
pos: position{line: 293, col: 21, offset: 7578},
val: "[ \" \\\\ / b f n r t ]",
chars: []rune{' ', '"', ' ', '\\', ' ', '/', ' ', 'b', ' ', 'f', ' ', 'n', ' ', 'r', ' ', 't', ' '},
ignoreCase: false,
inverted: false,
},
},
{
name: "UnicodeEscape",
pos: position{line: 295, col: 1, offset: 7600},
expr: &seqExpr{
pos: position{line: 295, col: 18, offset: 7617},
exprs: []interface{}{
&litMatcher{
pos: position{line: 295, col: 18, offset: 7617},
val: "u",
ignoreCase: false,
},
&ruleRefExpr{
pos: position{line: 295, col: 22, offset: 7621},
name: "HexDigit",
},
&ruleRefExpr{
pos: position{line: 295, col: 31, offset: 7630},
name: "HexDigit",
},
&ruleRefExpr{
pos: position{line: 295, col: 40, offset: 7639},
name: "HexDigit",
},
&ruleRefExpr{
pos: position{line: 295, col: 49, offset: 7648},
name: "HexDigit",
},
},
},
},
{
name: "DecimalDigit",
pos: position{line: 297, col: 1, offset: 7658},
expr: &charClassMatcher{
pos: position{line: 297, col: 17, offset: 7674},
val: "[0-9]",
ranges: []rune{'0', '9'},
ignoreCase: false,
inverted: false,
},
},
{
name: "NonZeroDecimalDigit",
pos: position{line: 299, col: 1, offset: 7681},
expr: &charClassMatcher{
pos: position{line: 299, col: 24, offset: 7704},
val: "[1-9]",
ranges: []rune{'1', '9'},
ignoreCase: false,
inverted: false,
},
},
{
name: "HexDigit",
pos: position{line: 301, col: 1, offset: 7711},
expr: &charClassMatcher{
pos: position{line: 301, col: 13, offset: 7723},
val: "[0-9a-fA-F]",
ranges: []rune{'0', '9', 'a', 'f', 'A', 'F'},
ignoreCase: false,
inverted: false,
},
},
{
name: "ws",
displayName: "\"whitespace\"",
pos: position{line: 303, col: 1, offset: 7736},
expr: &oneOrMoreExpr{
pos: position{line: 303, col: 20, offset: 7755},
expr: &charClassMatcher{
pos: position{line: 303, col: 20, offset: 7755},
val: "[ \\t\\r\\n]",
chars: []rune{' ', '\t', '\r', '\n'},
ignoreCase: false,
inverted: false,
},
},
},
{
name: "_",
displayName: "\"whitespace\"",
pos: position{line: 305, col: 1, offset: 7767},
expr: &zeroOrMoreExpr{
pos: position{line: 305, col: 19, offset: 7785},
expr: &choiceExpr{
pos: position{line: 305, col: 21, offset: 7787},
alternatives: []interface{}{
&charClassMatcher{
pos: position{line: 305, col: 21, offset: 7787},
val: "[ \\t\\r\\n]",
chars: []rune{' ', '\t', '\r', '\n'},
ignoreCase: false,
inverted: false,
},
&ruleRefExpr{
pos: position{line: 305, col: 33, offset: 7799},
name: "Comment",
},
},
},
},
},
{
name: "Comment",
pos: position{line: 307, col: 1, offset: 7811},
expr: &actionExpr{
pos: position{line: 307, col: 12, offset: 7822},
run: (*parser).callonComment1,
expr: &seqExpr{
pos: position{line: 307, col: 12, offset: 7822},
exprs: []interface{}{
&zeroOrMoreExpr{
pos: position{line: 307, col: 12, offset: 7822},
expr: &charClassMatcher{
pos: position{line: 307, col: 12, offset: 7822},
val: "[ \\t]",
chars: []rune{' ', '\t'},
ignoreCase: false,
inverted: false,
},
},
&litMatcher{
pos: position{line: 307, col: 19, offset: 7829},
val: "#",
ignoreCase: false,
},
&labeledExpr{
pos: position{line: 307, col: 23, offset: 7833},
label: "text",
expr: &zeroOrMoreExpr{
pos: position{line: 307, col: 28, offset: 7838},
expr: &charClassMatcher{
pos: position{line: 307, col: 28, offset: 7838},
val: "[^\\r\\n]",
chars: []rune{'\r', '\n'},
ignoreCase: false,
inverted: true,
},
},
},
},
},
},
},
{
name: "EOF",
pos: position{line: 311, col: 1, offset: 7885},
expr: &notExpr{
pos: position{line: 311, col: 8, offset: 7892},
expr: &anyMatcher{
line: 311, col: 9, offset: 7893,
},
},
},
},
}
func (c *current) onProgram1(vals interface{}) (interface{}, error) {
return makeProgram(c, vals)
}
func (p *parser) callonProgram1() (interface{}, error) {
stack := p.vstack[len(p.vstack)-1]
_ = stack
return p.cur.onProgram1(stack["vals"])
}
func (c *current) onStmt1(val interface{}) (interface{}, error) {
return val, nil
}
func (p *parser) callonStmt1() (interface{}, error) {
stack := p.vstack[len(p.vstack)-1]
_ = stack
return p.cur.onStmt1(stack["val"])
}
func (c *current) onPackage1(val interface{}) (interface{}, error) {
return makePackage(currentLocation(c), val)
}
func (p *parser) callonPackage1() (interface{}, error) {
stack := p.vstack[len(p.vstack)-1]
_ = stack
return p.cur.onPackage1(stack["val"])
}
func (c *current) onImport1(path, alias interface{}) (interface{}, error) {
return makeImport(currentLocation(c), path, alias)
}
func (p *parser) callonImport1() (interface{}, error) {
stack := p.vstack[len(p.vstack)-1]
_ = stack
return p.cur.onImport1(stack["path"], stack["alias"])
}
func (c *current) onDefaultRules1(name, operator, value interface{}) (interface{}, error) {
return makeDefaultRule(currentLocation(c), name, operator, value)
}
func (p *parser) callonDefaultRules1() (interface{}, error) {
stack := p.vstack[len(p.vstack)-1]
_ = stack
return p.cur.onDefaultRules1(stack["name"], stack["operator"], stack["value"])
}
func (c *current) onNormalRules1(head, rest interface{}) (interface{}, error) {
return makeRule(currentLocation(c), head, rest)
}
func (p *parser) callonNormalRules1() (interface{}, error) {
stack := p.vstack[len(p.vstack)-1]
_ = stack
return p.cur.onNormalRules1(stack["head"], stack["rest"])
}
func (c *current) onPartialRuleHead1(name, args, value interface{}) (interface{}, error) {
return makeRuleHead(currentLocation(c), name, args, nil, value)
}
func (p *parser) callonPartialRuleHead1() (interface{}, error) {
stack := p.vstack[len(p.vstack)-1]
_ = stack
return p.cur.onPartialRuleHead1(stack["name"], stack["args"], stack["value"])
}
func (c *current) onRuleHead1(name, key, value interface{}) (interface{}, error) {
return makeRuleHead(currentLocation(c), name, nil, key, value)
}
func (p *parser) callonRuleHead1() (interface{}, error) {
stack := p.vstack[len(p.vstack)-1]
_ = stack
return p.cur.onRuleHead1(stack["name"], stack["key"], stack["value"])
}
func (c *current) onArgs1(list interface{}) (interface{}, error) {
return makeArgs(list)
}
func (p *parser) callonArgs1() (interface{}, error) {
stack := p.vstack[len(p.vstack)-1]
_ = stack
return p.cur.onArgs1(stack["list"])
}
func (c *current) onElse1(value, body interface{}) (interface{}, error) {
return makeRuleExt(currentLocation(c), value, body)
}
func (p *parser) callonElse1() (interface{}, error) {
stack := p.vstack[len(p.vstack)-1]
_ = stack
return p.cur.onElse1(stack["value"], stack["body"])
}
func (c *current) onRuleDup1(b interface{}) (interface{}, error) {
return ruleExt{loc: currentLocation(c), body: b.(Body)}, nil
}
func (p *parser) callonRuleDup1() (interface{}, error) {
stack := p.vstack[len(p.vstack)-1]
_ = stack
return p.cur.onRuleDup1(stack["b"])
}
func (c *current) onNonEmptyBraceEnclosedBody1(val interface{}) (interface{}, error) {
if val == nil {
return NewBody(), fmt.Errorf("found empty body")
}
return val, nil
}
func (p *parser) callonNonEmptyBraceEnclosedBody1() (interface{}, error) {
stack := p.vstack[len(p.vstack)-1]
_ = stack
return p.cur.onNonEmptyBraceEnclosedBody1(stack["val"])
}
func (c *current) onBraceEnclosedBody1(val interface{}) (interface{}, error) {
return makeBraceEnclosedBody(currentLocation(c), val)
}
func (p *parser) callonBraceEnclosedBody1() (interface{}, error) {
stack := p.vstack[len(p.vstack)-1]
_ = stack
return p.cur.onBraceEnclosedBody1(stack["val"])
}
func (c *current) onWhitespaceBody1(head, tail interface{}) (interface{}, error) {
return makeBody(head, tail, 2)
}
func (p *parser) callonWhitespaceBody1() (interface{}, error) {
stack := p.vstack[len(p.vstack)-1]
_ = stack
return p.cur.onWhitespaceBody1(stack["head"], stack["tail"])
}
func (c *current) onNonWhitespaceBody1(head, tail interface{}) (interface{}, error) {
return makeBody(head, tail, 3)
}
func (p *parser) callonNonWhitespaceBody1() (interface{}, error) {
stack := p.vstack[len(p.vstack)-1]
_ = stack
return p.cur.onNonWhitespaceBody1(stack["head"], stack["tail"])
}
func (c *current) onSomeDecl1(symbols interface{}) (interface{}, error) {
return makeSomeDeclLiteral(currentLocation(c), symbols)
}
func (p *parser) callonSomeDecl1() (interface{}, error) {
stack := p.vstack[len(p.vstack)-1]
_ = stack
return p.cur.onSomeDecl1(stack["symbols"])
}
func (c *current) onSomeDeclList1(head, rest interface{}) (interface{}, error) {
return makeSomeDeclSymbols(head, rest)
}
func (p *parser) callonSomeDeclList1() (interface{}, error) {
stack := p.vstack[len(p.vstack)-1]
_ = stack
return p.cur.onSomeDeclList1(stack["head"], stack["rest"])
}
func (c *current) onTermExpr1(negated, value, with interface{}) (interface{}, error) {
return makeLiteral(negated, value, with)
}
func (p *parser) callonTermExpr1() (interface{}, error) {
stack := p.vstack[len(p.vstack)-1]
_ = stack
return p.cur.onTermExpr1(stack["negated"], stack["value"], stack["with"])
}
func (c *current) onLiteralExpr1(lhs, rest interface{}) (interface{}, error) {
return makeLiteralExpr(currentLocation(c), lhs, rest)
}
func (p *parser) callonLiteralExpr1() (interface{}, error) {
stack := p.vstack[len(p.vstack)-1]
_ = stack
return p.cur.onLiteralExpr1(stack["lhs"], stack["rest"])
}
func (c *current) onLiteralExprOperator1(val interface{}) (interface{}, error) {
return makeInfixOperator(currentLocation(c), c.text)
}
func (p *parser) callonLiteralExprOperator1() (interface{}, error) {
stack := p.vstack[len(p.vstack)-1]
_ = stack
return p.cur.onLiteralExprOperator1(stack["val"])
}
func (c *current) onNotKeyword1(val interface{}) (interface{}, error) {
return val != nil, nil
}
func (p *parser) callonNotKeyword1() (interface{}, error) {
stack := p.vstack[len(p.vstack)-1]
_ = stack
return p.cur.onNotKeyword1(stack["val"])
}
func (c *current) onWithKeywordList1(head, rest interface{}) (interface{}, error) {
return makeWithKeywordList(head, rest)
}
func (p *parser) callonWithKeywordList1() (interface{}, error) {
stack := p.vstack[len(p.vstack)-1]
_ = stack
return p.cur.onWithKeywordList1(stack["head"], stack["rest"])
}
func (c *current) onWithKeyword1(target, value interface{}) (interface{}, error) {
return makeWithKeyword(currentLocation(c), target, value)
}
func (p *parser) callonWithKeyword1() (interface{}, error) {
stack := p.vstack[len(p.vstack)-1]
_ = stack
return p.cur.onWithKeyword1(stack["target"], stack["value"])
}
func (c *current) onExprTerm1(lhs, rest interface{}) (interface{}, error) {
return makeExprTerm(currentLocation(c), lhs, rest)
}
func (p *parser) callonExprTerm1() (interface{}, error) {
stack := p.vstack[len(p.vstack)-1]
_ = stack
return p.cur.onExprTerm1(stack["lhs"], stack["rest"])
}
func (c *current) onExprTermPairList1(head, tail interface{}) (interface{}, error) {
return makeExprTermPairList(head, tail)
}
func (p *parser) callonExprTermPairList1() (interface{}, error) {
stack := p.vstack[len(p.vstack)-1]
_ = stack
return p.cur.onExprTermPairList1(stack["head"], stack["tail"])
}
func (c *current) onExprTermList1(head, tail interface{}) (interface{}, error) {
return makeExprTermList(head, tail)
}
func (p *parser) callonExprTermList1() (interface{}, error) {
stack := p.vstack[len(p.vstack)-1]
_ = stack
return p.cur.onExprTermList1(stack["head"], stack["tail"])
}
func (c *current) onExprTermPair1(key, value interface{}) (interface{}, error) {
return makeExprTermPair(key, value)
}
func (p *parser) callonExprTermPair1() (interface{}, error) {
stack := p.vstack[len(p.vstack)-1]
_ = stack
return p.cur.onExprTermPair1(stack["key"], stack["value"])
}
func (c *current) onRelationOperator1(val interface{}) (interface{}, error) {
return makeInfixOperator(currentLocation(c), c.text)
}
func (p *parser) callonRelationOperator1() (interface{}, error) {
stack := p.vstack[len(p.vstack)-1]
_ = stack
return p.cur.onRelationOperator1(stack["val"])
}
func (c *current) onRelationExpr1(lhs, rest interface{}) (interface{}, error) {
return makeExprTerm(currentLocation(c), lhs, rest)
}
func (p *parser) callonRelationExpr1() (interface{}, error) {
stack := p.vstack[len(p.vstack)-1]
_ = stack
return p.cur.onRelationExpr1(stack["lhs"], stack["rest"])
}
func (c *current) onBitwiseOrOperator1(val interface{}) (interface{}, error) {
return makeInfixOperator(currentLocation(c), c.text)
}
func (p *parser) callonBitwiseOrOperator1() (interface{}, error) {
stack := p.vstack[len(p.vstack)-1]
_ = stack
return p.cur.onBitwiseOrOperator1(stack["val"])
}
func (c *current) onBitwiseOrExpr1(lhs, rest interface{}) (interface{}, error) {
return makeExprTerm(currentLocation(c), lhs, rest)
}
func (p *parser) callonBitwiseOrExpr1() (interface{}, error) {
stack := p.vstack[len(p.vstack)-1]
_ = stack
return p.cur.onBitwiseOrExpr1(stack["lhs"], stack["rest"])
}
func (c *current) onBitwiseAndOperator1(val interface{}) (interface{}, error) {
return makeInfixOperator(currentLocation(c), c.text)
}
func (p *parser) callonBitwiseAndOperator1() (interface{}, error) {
stack := p.vstack[len(p.vstack)-1]
_ = stack
return p.cur.onBitwiseAndOperator1(stack["val"])
}
func (c *current) onBitwiseAndExpr1(lhs, rest interface{}) (interface{}, error) {
return makeExprTerm(currentLocation(c), lhs, rest)
}
func (p *parser) callonBitwiseAndExpr1() (interface{}, error) {
stack := p.vstack[len(p.vstack)-1]
_ = stack
return p.cur.onBitwiseAndExpr1(stack["lhs"], stack["rest"])
}
func (c *current) onArithOperator1(val interface{}) (interface{}, error) {
return makeInfixOperator(currentLocation(c), c.text)
}
func (p *parser) callonArithOperator1() (interface{}, error) {
stack := p.vstack[len(p.vstack)-1]
_ = stack
return p.cur.onArithOperator1(stack["val"])
}
func (c *current) onArithExpr1(lhs, rest interface{}) (interface{}, error) {
return makeExprTerm(currentLocation(c), lhs, rest)
}
func (p *parser) callonArithExpr1() (interface{}, error) {
stack := p.vstack[len(p.vstack)-1]
_ = stack
return p.cur.onArithExpr1(stack["lhs"], stack["rest"])
}
func (c *current) onFactorOperator1(val interface{}) (interface{}, error) {
return makeInfixOperator(currentLocation(c), c.text)
}
func (p *parser) callonFactorOperator1() (interface{}, error) {
stack := p.vstack[len(p.vstack)-1]
_ = stack
return p.cur.onFactorOperator1(stack["val"])
}
func (c *current) onFactorExpr2(expr interface{}) (interface{}, error) {
return expr, nil
}
func (p *parser) callonFactorExpr2() (interface{}, error) {
stack := p.vstack[len(p.vstack)-1]
_ = stack
return p.cur.onFactorExpr2(stack["expr"])
}
func (c *current) onFactorExpr10(term interface{}) (interface{}, error) {
return term, nil
}
func (p *parser) callonFactorExpr10() (interface{}, error) {
stack := p.vstack[len(p.vstack)-1]
_ = stack
return p.cur.onFactorExpr10(stack["term"])
}
func (c *current) onCall1(operator, args interface{}) (interface{}, error) {
return makeCall(currentLocation(c), operator, args)
}
func (p *parser) callonCall1() (interface{}, error) {
stack := p.vstack[len(p.vstack)-1]
_ = stack
return p.cur.onCall1(stack["operator"], stack["args"])
}
func (c *current) onTerm1(val, refs interface{}) (interface{}, error) {
return makeRef(currentLocation(c), val, refs)
}
func (p *parser) callonTerm1() (interface{}, error) {
stack := p.vstack[len(p.vstack)-1]
_ = stack
return p.cur.onTerm1(stack["val"], stack["refs"])
}
func (c *current) onTermPair1(key, value interface{}) (interface{}, error) {
return makeExprTermPair(key, value)
}
func (p *parser) callonTermPair1() (interface{}, error) {
stack := p.vstack[len(p.vstack)-1]
_ = stack
return p.cur.onTermPair1(stack["key"], stack["value"])
}
func (c *current) onArrayComprehension1(head, body interface{}) (interface{}, error) {
return makeArrayComprehension(currentLocation(c), head, body)
}
func (p *parser) callonArrayComprehension1() (interface{}, error) {
stack := p.vstack[len(p.vstack)-1]
_ = stack
return p.cur.onArrayComprehension1(stack["head"], stack["body"])
}
func (c *current) onObjectComprehension1(head, body interface{}) (interface{}, error) {
return makeObjectComprehension(currentLocation(c), head, body)
}
func (p *parser) callonObjectComprehension1() (interface{}, error) {
stack := p.vstack[len(p.vstack)-1]
_ = stack
return p.cur.onObjectComprehension1(stack["head"], stack["body"])
}
func (c *current) onSetComprehension1(head, body interface{}) (interface{}, error) {
return makeSetComprehension(currentLocation(c), head, body)
}
func (p *parser) callonSetComprehension1() (interface{}, error) {
stack := p.vstack[len(p.vstack)-1]
_ = stack
return p.cur.onSetComprehension1(stack["head"], stack["body"])
}
func (c *current) onObject1(list interface{}) (interface{}, error) {
return makeObject(currentLocation(c), list)
}
func (p *parser) callonObject1() (interface{}, error) {
stack := p.vstack[len(p.vstack)-1]
_ = stack
return p.cur.onObject1(stack["list"])
}
func (c *current) onArray1(list interface{}) (interface{}, error) {
return makeArray(currentLocation(c), list)
}
func (p *parser) callonArray1() (interface{}, error) {
stack := p.vstack[len(p.vstack)-1]
_ = stack
return p.cur.onArray1(stack["list"])
}
func (c *current) onSetEmpty1() (interface{}, error) {
var empty []*Term
return makeSet(currentLocation(c), empty)
}
func (p *parser) callonSetEmpty1() (interface{}, error) {
stack := p.vstack[len(p.vstack)-1]
_ = stack
return p.cur.onSetEmpty1()
}
func (c *current) onSetNonEmpty1(list interface{}) (interface{}, error) {
return makeSet(currentLocation(c), list)
}
func (p *parser) callonSetNonEmpty1() (interface{}, error) {
stack := p.vstack[len(p.vstack)-1]
_ = stack
return p.cur.onSetNonEmpty1(stack["list"])
}
func (c *current) onRef1(head, rest interface{}) (interface{}, error) {
return makeRef(currentLocation(c), head, rest)
}
func (p *parser) callonRef1() (interface{}, error) {
stack := p.vstack[len(p.vstack)-1]
_ = stack
return p.cur.onRef1(stack["head"], stack["rest"])
}
func (c *current) onRefOperandDot1(val interface{}) (interface{}, error) {
return makeRefOperandDot(currentLocation(c), val)
}
func (p *parser) callonRefOperandDot1() (interface{}, error) {
stack := p.vstack[len(p.vstack)-1]
_ = stack
return p.cur.onRefOperandDot1(stack["val"])
}
func (c *current) onRefOperandCanonical1(val interface{}) (interface{}, error) {
return val, nil
}
func (p *parser) callonRefOperandCanonical1() (interface{}, error) {
stack := p.vstack[len(p.vstack)-1]
_ = stack
return p.cur.onRefOperandCanonical1(stack["val"])
}
func (c *current) onVar1(val interface{}) (interface{}, error) {
return val.([]interface{})[0], nil
}
func (p *parser) callonVar1() (interface{}, error) {
stack := p.vstack[len(p.vstack)-1]
_ = stack
return p.cur.onVar1(stack["val"])
}
func (c *current) onVarChecked4(val interface{}) (bool, error) {
return IsKeyword(string(val.(*Term).Value.(Var))), nil
}
func (p *parser) callonVarChecked4() (bool, error) {
stack := p.vstack[len(p.vstack)-1]
_ = stack
return p.cur.onVarChecked4(stack["val"])
}
func (c *current) onVarUnchecked1() (interface{}, error) {
return makeVar(currentLocation(c), c.text)
}
func (p *parser) callonVarUnchecked1() (interface{}, error) {
stack := p.vstack[len(p.vstack)-1]
_ = stack
return p.cur.onVarUnchecked1()
}
func (c *current) onNumber1() (interface{}, error) {
return makeNumber(currentLocation(c), c.text)
}
func (p *parser) callonNumber1() (interface{}, error) {
stack := p.vstack[len(p.vstack)-1]
_ = stack
return p.cur.onNumber1()
}
func (c *current) onQuotedString2() (interface{}, error) {
return makeString(currentLocation(c), c.text)
}
func (p *parser) callonQuotedString2() (interface{}, error) {
stack := p.vstack[len(p.vstack)-1]
_ = stack
return p.cur.onQuotedString2()
}
func (c *current) onQuotedString8() (interface{}, error) {
return makeNonterminatedString(currentLocation(c), string(c.text))
}
func (p *parser) callonQuotedString8() (interface{}, error) {
stack := p.vstack[len(p.vstack)-1]
_ = stack
return p.cur.onQuotedString8()
}
func (c *current) onRawString1() (interface{}, error) {
return makeRawString(currentLocation(c), c.text)
}
func (p *parser) callonRawString1() (interface{}, error) {
stack := p.vstack[len(p.vstack)-1]
_ = stack
return p.cur.onRawString1()
}
func (c *current) onBool1(val interface{}) (interface{}, error) {
return makeBool(currentLocation(c), c.text)
}
func (p *parser) callonBool1() (interface{}, error) {
stack := p.vstack[len(p.vstack)-1]
_ = stack
return p.cur.onBool1(stack["val"])
}
func (c *current) onNull1() (interface{}, error) {
return makeNull(currentLocation(c))
}
func (p *parser) callonNull1() (interface{}, error) {
stack := p.vstack[len(p.vstack)-1]
_ = stack
return p.cur.onNull1()
}
func (c *current) onComment1(text interface{}) (interface{}, error) {
return makeComments(c, text)
}
func (p *parser) callonComment1() (interface{}, error) {
stack := p.vstack[len(p.vstack)-1]
_ = stack
return p.cur.onComment1(stack["text"])
}
var (
// errNoRule is returned when the grammar to parse has no rule.
errNoRule = errors.New("grammar has no rule")
// errInvalidEntrypoint is returned when the specified entrypoint rule
// does not exit.
errInvalidEntrypoint = errors.New("invalid entrypoint")
// errInvalidEncoding is returned when the source is not properly
// utf8-encoded.
errInvalidEncoding = errors.New("invalid encoding")
// errMaxExprCnt is used to signal that the maximum number of
// expressions have been parsed.
errMaxExprCnt = errors.New("max number of expresssions parsed")
)
// Option is a function that can set an option on the parser. It returns
// the previous setting as an Option.
type Option func(*parser) Option
// MaxExpressions creates an Option to stop parsing after the provided
// number of expressions have been parsed, if the value is 0 then the parser will
// parse for as many steps as needed (possibly an infinite number).
//
// The default for maxExprCnt is 0.
func MaxExpressions(maxExprCnt uint64) Option {
return func(p *parser) Option {
oldMaxExprCnt := p.maxExprCnt
p.maxExprCnt = maxExprCnt
return MaxExpressions(oldMaxExprCnt)
}
}
// Entrypoint creates an Option to set the rule name to use as entrypoint.
// The rule name must have been specified in the -alternate-entrypoints
// if generating the parser with the -optimize-grammar flag, otherwise
// it may have been optimized out. Passing an empty string sets the
// entrypoint to the first rule in the grammar.
//
// The default is to start parsing at the first rule in the grammar.
func Entrypoint(ruleName string) Option {
return func(p *parser) Option {
oldEntrypoint := p.entrypoint
p.entrypoint = ruleName
if ruleName == "" {
p.entrypoint = g.rules[0].name
}
return Entrypoint(oldEntrypoint)
}
}
// Statistics adds a user provided Stats struct to the parser to allow
// the user to process the results after the parsing has finished.
// Also the key for the "no match" counter is set.
//
// Example usage:
//
// input := "input"
// stats := Stats{}
// _, err := Parse("input-file", []byte(input), Statistics(&stats, "no match"))
// if err != nil {
// log.Panicln(err)
// }
// b, err := json.MarshalIndent(stats.ChoiceAltCnt, "", " ")
// if err != nil {
// log.Panicln(err)
// }
// fmt.Println(string(b))
//
func Statistics(stats *Stats, choiceNoMatch string) Option {
return func(p *parser) Option {
oldStats := p.Stats
p.Stats = stats
oldChoiceNoMatch := p.choiceNoMatch
p.choiceNoMatch = choiceNoMatch
if p.Stats.ChoiceAltCnt == nil {
p.Stats.ChoiceAltCnt = make(map[string]map[string]int)
}
return Statistics(oldStats, oldChoiceNoMatch)
}
}
// Debug creates an Option to set the debug flag to b. When set to true,
// debugging information is printed to stdout while parsing.
//
// The default is false.
func Debug(b bool) Option {
return func(p *parser) Option {
old := p.debug
p.debug = b
return Debug(old)
}
}
// Memoize creates an Option to set the memoize flag to b. When set to true,
// the parser will cache all results so each expression is evaluated only
// once. This guarantees linear parsing time even for pathological cases,
// at the expense of more memory and slower times for typical cases.
//
// The default is false.
func Memoize(b bool) Option {
return func(p *parser) Option {
old := p.memoize
p.memoize = b
return Memoize(old)
}
}
// AllowInvalidUTF8 creates an Option to allow invalid UTF-8 bytes.
// Every invalid UTF-8 byte is treated as a utf8.RuneError (U+FFFD)
// by character class matchers and is matched by the any matcher.
// The returned matched value, c.text and c.offset are NOT affected.
//
// The default is false.
func AllowInvalidUTF8(b bool) Option {
return func(p *parser) Option {
old := p.allowInvalidUTF8
p.allowInvalidUTF8 = b
return AllowInvalidUTF8(old)
}
}
// Recover creates an Option to set the recover flag to b. When set to
// true, this causes the parser to recover from panics and convert it
// to an error. Setting it to false can be useful while debugging to
// access the full stack trace.
//
// The default is true.
func Recover(b bool) Option {
return func(p *parser) Option {
old := p.recover
p.recover = b
return Recover(old)
}
}
// GlobalStore creates an Option to set a key to a certain value in
// the globalStore.
func GlobalStore(key string, value interface{}) Option {
return func(p *parser) Option {
old := p.cur.globalStore[key]
p.cur.globalStore[key] = value
return GlobalStore(key, old)
}
}
// InitState creates an Option to set a key to a certain value in
// the global "state" store.
func InitState(key string, value interface{}) Option {
return func(p *parser) Option {
old := p.cur.state[key]
p.cur.state[key] = value
return InitState(key, old)
}
}
// ParseFile parses the file identified by filename.
func ParseFile(filename string, opts ...Option) (i interface{}, err error) {
f, err := os.Open(filename)
if err != nil {
return nil, err
}
defer func() {
if closeErr := f.Close(); closeErr != nil {
err = closeErr
}
}()
return ParseReader(filename, f, opts...)
}
// ParseReader parses the data from r using filename as information in the
// error messages.
func ParseReader(filename string, r io.Reader, opts ...Option) (interface{}, error) {
b, err := ioutil.ReadAll(r)
if err != nil {
return nil, err
}
return Parse(filename, b, opts...)
}
// Parse parses the data from b using filename as information in the
// error messages.
func Parse(filename string, b []byte, opts ...Option) (interface{}, error) {
return newParser(filename, b, opts...).parse(g)
}
// position records a position in the text.
type position struct {
line, col, offset int
}
func (p position) String() string {
return fmt.Sprintf("%d:%d [%d]", p.line, p.col, p.offset)
}
// savepoint stores all state required to go back to this point in the
// parser.
type savepoint struct {
position
rn rune
w int
}
type current struct {
pos position // start position of the match
text []byte // raw text of the match
// state is a store for arbitrary key,value pairs that the user wants to be
// tied to the backtracking of the parser.
// This is always rolled back if a parsing rule fails.
state storeDict
// globalStore is a general store for the user to store arbitrary key-value
// pairs that they need to manage and that they do not want tied to the
// backtracking of the parser. This is only modified by the user and never
// rolled back by the parser. It is always up to the user to keep this in a
// consistent state.
globalStore storeDict
}
type storeDict map[string]interface{}
// the AST types...
type grammar struct {
pos position
rules []*rule
}
type rule struct {
pos position
name string
displayName string
expr interface{}
}
type choiceExpr struct {
pos position
alternatives []interface{}
}
type actionExpr struct {
pos position
expr interface{}
run func(*parser) (interface{}, error)
}
type recoveryExpr struct {
pos position
expr interface{}
recoverExpr interface{}
failureLabel []string
}
type seqExpr struct {
pos position
exprs []interface{}
}
type throwExpr struct {
pos position
label string
}
type labeledExpr struct {
pos position
label string
expr interface{}
}
type expr struct {
pos position
expr interface{}
}
type andExpr expr
type notExpr expr
type zeroOrOneExpr expr
type zeroOrMoreExpr expr
type oneOrMoreExpr expr
type ruleRefExpr struct {
pos position
name string
}
type stateCodeExpr struct {
pos position
run func(*parser) error
}
type andCodeExpr struct {
pos position
run func(*parser) (bool, error)
}
type notCodeExpr struct {
pos position
run func(*parser) (bool, error)
}
type litMatcher struct {
pos position
val string
ignoreCase bool
}
type charClassMatcher struct {
pos position
val string
basicLatinChars [128]bool
chars []rune
ranges []rune
classes []*unicode.RangeTable
ignoreCase bool
inverted bool
}
type anyMatcher position
// errList cumulates the errors found by the parser.
type errList []error
func (e *errList) add(err error) {
*e = append(*e, err)
}
func (e errList) err() error {
if len(e) == 0 {
return nil
}
e.dedupe()
return e
}
func (e *errList) dedupe() {
var cleaned []error
set := make(map[string]bool)
for _, err := range *e {
if msg := err.Error(); !set[msg] {
set[msg] = true
cleaned = append(cleaned, err)
}
}
*e = cleaned
}
func (e errList) Error() string {
switch len(e) {
case 0:
return ""
case 1:
return e[0].Error()
default:
var buf bytes.Buffer
for i, err := range e {
if i > 0 {
buf.WriteRune('\n')
}
buf.WriteString(err.Error())
}
return buf.String()
}
}
// parserError wraps an error with a prefix indicating the rule in which
// the error occurred. The original error is stored in the Inner field.
type parserError struct {
Inner error
pos position
prefix string
expected []string
}
// Error returns the error message.
func (p *parserError) Error() string {
return p.prefix + ": " + p.Inner.Error()
}
// newParser creates a parser with the specified input source and options.
func newParser(filename string, b []byte, opts ...Option) *parser {
stats := Stats{
ChoiceAltCnt: make(map[string]map[string]int),
}
p := &parser{
filename: filename,
errs: new(errList),
data: b,
pt: savepoint{position: position{line: 1}},
recover: true,
cur: current{
state: make(storeDict),
globalStore: make(storeDict),
},
maxFailPos: position{col: 1, line: 1},
maxFailExpected: make([]string, 0, 20),
Stats: &stats,
// start rule is rule [0] unless an alternate entrypoint is specified
entrypoint: g.rules[0].name,
}
p.setOptions(opts)
if p.maxExprCnt == 0 {
p.maxExprCnt = math.MaxUint64
}
return p
}
// setOptions applies the options to the parser.
func (p *parser) setOptions(opts []Option) {
for _, opt := range opts {
opt(p)
}
}
type resultTuple struct {
v interface{}
b bool
end savepoint
}
const choiceNoMatch = -1
// Stats stores some statistics, gathered during parsing
type Stats struct {
// ExprCnt counts the number of expressions processed during parsing
// This value is compared to the maximum number of expressions allowed
// (set by the MaxExpressions option).
ExprCnt uint64
// ChoiceAltCnt is used to count for each ordered choice expression,
// which alternative is used how may times.
// These numbers allow to optimize the order of the ordered choice expression
// to increase the performance of the parser
//
// The outer key of ChoiceAltCnt is composed of the name of the rule as well
// as the line and the column of the ordered choice.
// The inner key of ChoiceAltCnt is the number (one-based) of the matching alternative.
// For each alternative the number of matches are counted. If an ordered choice does not
// match, a special counter is incremented. The name of this counter is set with
// the parser option Statistics.
// For an alternative to be included in ChoiceAltCnt, it has to match at least once.
ChoiceAltCnt map[string]map[string]int
}
type parser struct {
filename string
pt savepoint
cur current
data []byte
errs *errList
depth int
recover bool
debug bool
memoize bool
// memoization table for the packrat algorithm:
// map[offset in source] map[expression or rule] {value, match}
memo map[int]map[interface{}]resultTuple
// rules table, maps the rule identifier to the rule node
rules map[string]*rule
// variables stack, map of label to value
vstack []map[string]interface{}
// rule stack, allows identification of the current rule in errors
rstack []*rule
// parse fail
maxFailPos position
maxFailExpected []string
maxFailInvertExpected bool
// max number of expressions to be parsed
maxExprCnt uint64
// entrypoint for the parser
entrypoint string
allowInvalidUTF8 bool
*Stats
choiceNoMatch string
// recovery expression stack, keeps track of the currently available recovery expression, these are traversed in reverse
recoveryStack []map[string]interface{}
}
// push a variable set on the vstack.
func (p *parser) pushV() {
if cap(p.vstack) == len(p.vstack) {
// create new empty slot in the stack
p.vstack = append(p.vstack, nil)
} else {
// slice to 1 more
p.vstack = p.vstack[:len(p.vstack)+1]
}
// get the last args set
m := p.vstack[len(p.vstack)-1]
if m != nil && len(m) == 0 {
// empty map, all good
return
}
m = make(map[string]interface{})
p.vstack[len(p.vstack)-1] = m
}
// pop a variable set from the vstack.
func (p *parser) popV() {
// if the map is not empty, clear it
m := p.vstack[len(p.vstack)-1]
if len(m) > 0 {
// GC that map
p.vstack[len(p.vstack)-1] = nil
}
p.vstack = p.vstack[:len(p.vstack)-1]
}
// push a recovery expression with its labels to the recoveryStack
func (p *parser) pushRecovery(labels []string, expr interface{}) {
if cap(p.recoveryStack) == len(p.recoveryStack) {
// create new empty slot in the stack
p.recoveryStack = append(p.recoveryStack, nil)
} else {
// slice to 1 more
p.recoveryStack = p.recoveryStack[:len(p.recoveryStack)+1]
}
m := make(map[string]interface{}, len(labels))
for _, fl := range labels {
m[fl] = expr
}
p.recoveryStack[len(p.recoveryStack)-1] = m
}
// pop a recovery expression from the recoveryStack
func (p *parser) popRecovery() {
// GC that map
p.recoveryStack[len(p.recoveryStack)-1] = nil
p.recoveryStack = p.recoveryStack[:len(p.recoveryStack)-1]
}
func (p *parser) print(prefix, s string) string {
if !p.debug {
return s
}
fmt.Printf("%s %d:%d:%d: %s [%#U]\n",
prefix, p.pt.line, p.pt.col, p.pt.offset, s, p.pt.rn)
return s
}
func (p *parser) in(s string) string {
p.depth++
return p.print(strings.Repeat(" ", p.depth)+">", s)
}
func (p *parser) out(s string) string {
p.depth--
return p.print(strings.Repeat(" ", p.depth)+"<", s)
}
func (p *parser) addErr(err error) {
p.addErrAt(err, p.pt.position, []string{})
}
func (p *parser) addErrAt(err error, pos position, expected []string) {
var buf bytes.Buffer
if p.filename != "" {
buf.WriteString(p.filename)
}
if buf.Len() > 0 {
buf.WriteString(":")
}
buf.WriteString(fmt.Sprintf("%d:%d (%d)", pos.line, pos.col, pos.offset))
if len(p.rstack) > 0 {
if buf.Len() > 0 {
buf.WriteString(": ")
}
rule := p.rstack[len(p.rstack)-1]
if rule.displayName != "" {
buf.WriteString("rule " + rule.displayName)
} else {
buf.WriteString("rule " + rule.name)
}
}
pe := &parserError{Inner: err, pos: pos, prefix: buf.String(), expected: expected}
p.errs.add(pe)
}
func (p *parser) failAt(fail bool, pos position, want string) {
// process fail if parsing fails and not inverted or parsing succeeds and invert is set
if fail == p.maxFailInvertExpected {
if pos.offset < p.maxFailPos.offset {
return
}
if pos.offset > p.maxFailPos.offset {
p.maxFailPos = pos
p.maxFailExpected = p.maxFailExpected[:0]
}
if p.maxFailInvertExpected {
want = "!" + want
}
p.maxFailExpected = append(p.maxFailExpected, want)
}
}
// read advances the parser to the next rune.
func (p *parser) read() {
p.pt.offset += p.pt.w
rn, n := utf8.DecodeRune(p.data[p.pt.offset:])
p.pt.rn = rn
p.pt.w = n
p.pt.col++
if rn == '\n' {
p.pt.line++
p.pt.col = 0
}
if rn == utf8.RuneError && n == 1 { // see utf8.DecodeRune
if !p.allowInvalidUTF8 {
p.addErr(errInvalidEncoding)
}
}
}
// restore parser position to the savepoint pt.
func (p *parser) restore(pt savepoint) {
if p.debug {
defer p.out(p.in("restore"))
}
if pt.offset == p.pt.offset {
return
}
p.pt = pt
}
// Cloner is implemented by any value that has a Clone method, which returns a
// copy of the value. This is mainly used for types which are not passed by
// value (e.g map, slice, chan) or structs that contain such types.
//
// This is used in conjunction with the global state feature to create proper
// copies of the state to allow the parser to properly restore the state in
// the case of backtracking.
type Cloner interface {
Clone() interface{}
}
// clone and return parser current state.
func (p *parser) cloneState() storeDict {
if p.debug {
defer p.out(p.in("cloneState"))
}
state := make(storeDict, len(p.cur.state))
for k, v := range p.cur.state {
if c, ok := v.(Cloner); ok {
state[k] = c.Clone()
} else {
state[k] = v
}
}
return state
}
// restore parser current state to the state storeDict.
// every restoreState should applied only one time for every cloned state
func (p *parser) restoreState(state storeDict) {
if p.debug {
defer p.out(p.in("restoreState"))
}
p.cur.state = state
}
// get the slice of bytes from the savepoint start to the current position.
func (p *parser) sliceFrom(start savepoint) []byte {
return p.data[start.position.offset:p.pt.position.offset]
}
func (p *parser) getMemoized(node interface{}) (resultTuple, bool) {
if len(p.memo) == 0 {
return resultTuple{}, false
}
m := p.memo[p.pt.offset]
if len(m) == 0 {
return resultTuple{}, false
}
res, ok := m[node]
return res, ok
}
func (p *parser) setMemoized(pt savepoint, node interface{}, tuple resultTuple) {
if p.memo == nil {
p.memo = make(map[int]map[interface{}]resultTuple)
}
m := p.memo[pt.offset]
if m == nil {
m = make(map[interface{}]resultTuple)
p.memo[pt.offset] = m
}
m[node] = tuple
}
func (p *parser) buildRulesTable(g *grammar) {
p.rules = make(map[string]*rule, len(g.rules))
for _, r := range g.rules {
p.rules[r.name] = r
}
}
func (p *parser) parse(g *grammar) (val interface{}, err error) {
if len(g.rules) == 0 {
p.addErr(errNoRule)
return nil, p.errs.err()
}
// TODO : not super critical but this could be generated
p.buildRulesTable(g)
if p.recover {
// panic can be used in action code to stop parsing immediately
// and return the panic as an error.
defer func() {
if e := recover(); e != nil {
if p.debug {
defer p.out(p.in("panic handler"))
}
val = nil
switch e := e.(type) {
case error:
p.addErr(e)
default:
p.addErr(fmt.Errorf("%v", e))
}
err = p.errs.err()
}
}()
}
startRule, ok := p.rules[p.entrypoint]
if !ok {
p.addErr(errInvalidEntrypoint)
return nil, p.errs.err()
}
p.read() // advance to first rune
val, ok = p.parseRule(startRule)
if !ok {
if len(*p.errs) == 0 {
// If parsing fails, but no errors have been recorded, the expected values
// for the farthest parser position are returned as error.
maxFailExpectedMap := make(map[string]struct{}, len(p.maxFailExpected))
for _, v := range p.maxFailExpected {
maxFailExpectedMap[v] = struct{}{}
}
expected := make([]string, 0, len(maxFailExpectedMap))
eof := false
if _, ok := maxFailExpectedMap["!."]; ok {
delete(maxFailExpectedMap, "!.")
eof = true
}
for k := range maxFailExpectedMap {
expected = append(expected, k)
}
sort.Strings(expected)
if eof {
expected = append(expected, "EOF")
}
p.addErrAt(errors.New("no match found, expected: "+listJoin(expected, ", ", "or")), p.maxFailPos, expected)
}
return nil, p.errs.err()
}
return val, p.errs.err()
}
func listJoin(list []string, sep string, lastSep string) string {
switch len(list) {
case 0:
return ""
case 1:
return list[0]
default:
return fmt.Sprintf("%s %s %s", strings.Join(list[:len(list)-1], sep), lastSep, list[len(list)-1])
}
}
func (p *parser) parseRule(rule *rule) (interface{}, bool) {
if p.debug {
defer p.out(p.in("parseRule " + rule.name))
}
if p.memoize {
res, ok := p.getMemoized(rule)
if ok {
p.restore(res.end)
return res.v, res.b
}
}
start := p.pt
p.rstack = append(p.rstack, rule)
p.pushV()
val, ok := p.parseExpr(rule.expr)
p.popV()
p.rstack = p.rstack[:len(p.rstack)-1]
if ok && p.debug {
p.print(strings.Repeat(" ", p.depth)+"MATCH", string(p.sliceFrom(start)))
}
if p.memoize {
p.setMemoized(start, rule, resultTuple{val, ok, p.pt})
}
return val, ok
}
func (p *parser) parseExpr(expr interface{}) (interface{}, bool) {
var pt savepoint
if p.memoize {
res, ok := p.getMemoized(expr)
if ok {
p.restore(res.end)
return res.v, res.b
}
pt = p.pt
}
p.ExprCnt++
if p.ExprCnt > p.maxExprCnt {
panic(errMaxExprCnt)
}
var val interface{}
var ok bool
switch expr := expr.(type) {
case *actionExpr:
val, ok = p.parseActionExpr(expr)
case *andCodeExpr:
val, ok = p.parseAndCodeExpr(expr)
case *andExpr:
val, ok = p.parseAndExpr(expr)
case *anyMatcher:
val, ok = p.parseAnyMatcher(expr)
case *charClassMatcher:
val, ok = p.parseCharClassMatcher(expr)
case *choiceExpr:
val, ok = p.parseChoiceExpr(expr)
case *labeledExpr:
val, ok = p.parseLabeledExpr(expr)
case *litMatcher:
val, ok = p.parseLitMatcher(expr)
case *notCodeExpr:
val, ok = p.parseNotCodeExpr(expr)
case *notExpr:
val, ok = p.parseNotExpr(expr)
case *oneOrMoreExpr:
val, ok = p.parseOneOrMoreExpr(expr)
case *recoveryExpr:
val, ok = p.parseRecoveryExpr(expr)
case *ruleRefExpr:
val, ok = p.parseRuleRefExpr(expr)
case *seqExpr:
val, ok = p.parseSeqExpr(expr)
case *stateCodeExpr:
val, ok = p.parseStateCodeExpr(expr)
case *throwExpr:
val, ok = p.parseThrowExpr(expr)
case *zeroOrMoreExpr:
val, ok = p.parseZeroOrMoreExpr(expr)
case *zeroOrOneExpr:
val, ok = p.parseZeroOrOneExpr(expr)
default:
panic(fmt.Sprintf("unknown expression type %T", expr))
}
if p.memoize {
p.setMemoized(pt, expr, resultTuple{val, ok, p.pt})
}
return val, ok
}
func (p *parser) parseActionExpr(act *actionExpr) (interface{}, bool) {
if p.debug {
defer p.out(p.in("parseActionExpr"))
}
start := p.pt
val, ok := p.parseExpr(act.expr)
if ok {
p.cur.pos = start.position
p.cur.text = p.sliceFrom(start)
state := p.cloneState()
actVal, err := act.run(p)
if err != nil {
p.addErrAt(err, start.position, []string{})
}
p.restoreState(state)
val = actVal
}
if ok && p.debug {
p.print(strings.Repeat(" ", p.depth)+"MATCH", string(p.sliceFrom(start)))
}
return val, ok
}
func (p *parser) parseAndCodeExpr(and *andCodeExpr) (interface{}, bool) {
if p.debug {
defer p.out(p.in("parseAndCodeExpr"))
}
state := p.cloneState()
ok, err := and.run(p)
if err != nil {
p.addErr(err)
}
p.restoreState(state)
return nil, ok
}
func (p *parser) parseAndExpr(and *andExpr) (interface{}, bool) {
if p.debug {
defer p.out(p.in("parseAndExpr"))
}
pt := p.pt
state := p.cloneState()
p.pushV()
_, ok := p.parseExpr(and.expr)
p.popV()
p.restoreState(state)
p.restore(pt)
return nil, ok
}
func (p *parser) parseAnyMatcher(any *anyMatcher) (interface{}, bool) {
if p.debug {
defer p.out(p.in("parseAnyMatcher"))
}
if p.pt.rn == utf8.RuneError && p.pt.w == 0 {
// EOF - see utf8.DecodeRune
p.failAt(false, p.pt.position, ".")
return nil, false
}
start := p.pt
p.read()
p.failAt(true, start.position, ".")
return p.sliceFrom(start), true
}
func (p *parser) parseCharClassMatcher(chr *charClassMatcher) (interface{}, bool) {
if p.debug {
defer p.out(p.in("parseCharClassMatcher"))
}
cur := p.pt.rn
start := p.pt
// can't match EOF
if cur == utf8.RuneError && p.pt.w == 0 { // see utf8.DecodeRune
p.failAt(false, start.position, chr.val)
return nil, false
}
if chr.ignoreCase {
cur = unicode.ToLower(cur)
}
// try to match in the list of available chars
for _, rn := range chr.chars {
if rn == cur {
if chr.inverted {
p.failAt(false, start.position, chr.val)
return nil, false
}
p.read()
p.failAt(true, start.position, chr.val)
return p.sliceFrom(start), true
}
}
// try to match in the list of ranges
for i := 0; i < len(chr.ranges); i += 2 {
if cur >= chr.ranges[i] && cur <= chr.ranges[i+1] {
if chr.inverted {
p.failAt(false, start.position, chr.val)
return nil, false
}
p.read()
p.failAt(true, start.position, chr.val)
return p.sliceFrom(start), true
}
}
// try to match in the list of Unicode classes
for _, cl := range chr.classes {
if unicode.Is(cl, cur) {
if chr.inverted {
p.failAt(false, start.position, chr.val)
return nil, false
}
p.read()
p.failAt(true, start.position, chr.val)
return p.sliceFrom(start), true
}
}
if chr.inverted {
p.read()
p.failAt(true, start.position, chr.val)
return p.sliceFrom(start), true
}
p.failAt(false, start.position, chr.val)
return nil, false
}
func (p *parser) incChoiceAltCnt(ch *choiceExpr, altI int) {
choiceIdent := fmt.Sprintf("%s %d:%d", p.rstack[len(p.rstack)-1].name, ch.pos.line, ch.pos.col)
m := p.ChoiceAltCnt[choiceIdent]
if m == nil {
m = make(map[string]int)
p.ChoiceAltCnt[choiceIdent] = m
}
// We increment altI by 1, so the keys do not start at 0
alt := strconv.Itoa(altI + 1)
if altI == choiceNoMatch {
alt = p.choiceNoMatch
}
m[alt]++
}
func (p *parser) parseChoiceExpr(ch *choiceExpr) (interface{}, bool) {
if p.debug {
defer p.out(p.in("parseChoiceExpr"))
}
for altI, alt := range ch.alternatives {
// dummy assignment to prevent compile error if optimized
_ = altI
state := p.cloneState()
p.pushV()
val, ok := p.parseExpr(alt)
p.popV()
if ok {
p.incChoiceAltCnt(ch, altI)
return val, ok
}
p.restoreState(state)
}
p.incChoiceAltCnt(ch, choiceNoMatch)
return nil, false
}
func (p *parser) parseLabeledExpr(lab *labeledExpr) (interface{}, bool) {
if p.debug {
defer p.out(p.in("parseLabeledExpr"))
}
p.pushV()
val, ok := p.parseExpr(lab.expr)
p.popV()
if ok && lab.label != "" {
m := p.vstack[len(p.vstack)-1]
m[lab.label] = val
}
return val, ok
}
func (p *parser) parseLitMatcher(lit *litMatcher) (interface{}, bool) {
if p.debug {
defer p.out(p.in("parseLitMatcher"))
}
ignoreCase := ""
if lit.ignoreCase {
ignoreCase = "i"
}
val := fmt.Sprintf("%q%s", lit.val, ignoreCase)
start := p.pt
for _, want := range lit.val {
cur := p.pt.rn
if lit.ignoreCase {
cur = unicode.ToLower(cur)
}
if cur != want {
p.failAt(false, start.position, val)
p.restore(start)
return nil, false
}
p.read()
}
p.failAt(true, start.position, val)
return p.sliceFrom(start), true
}
func (p *parser) parseNotCodeExpr(not *notCodeExpr) (interface{}, bool) {
if p.debug {
defer p.out(p.in("parseNotCodeExpr"))
}
state := p.cloneState()
ok, err := not.run(p)
if err != nil {
p.addErr(err)
}
p.restoreState(state)
return nil, !ok
}
func (p *parser) parseNotExpr(not *notExpr) (interface{}, bool) {
if p.debug {
defer p.out(p.in("parseNotExpr"))
}
pt := p.pt
state := p.cloneState()
p.pushV()
p.maxFailInvertExpected = !p.maxFailInvertExpected
_, ok := p.parseExpr(not.expr)
p.maxFailInvertExpected = !p.maxFailInvertExpected
p.popV()
p.restoreState(state)
p.restore(pt)
return nil, !ok
}
func (p *parser) parseOneOrMoreExpr(expr *oneOrMoreExpr) (interface{}, bool) {
if p.debug {
defer p.out(p.in("parseOneOrMoreExpr"))
}
var vals []interface{}
for {
p.pushV()
val, ok := p.parseExpr(expr.expr)
p.popV()
if !ok {
if len(vals) == 0 {
// did not match once, no match
return nil, false
}
return vals, true
}
vals = append(vals, val)
}
}
func (p *parser) parseRecoveryExpr(recover *recoveryExpr) (interface{}, bool) {
if p.debug {
defer p.out(p.in("parseRecoveryExpr (" + strings.Join(recover.failureLabel, ",") + ")"))
}
p.pushRecovery(recover.failureLabel, recover.recoverExpr)
val, ok := p.parseExpr(recover.expr)
p.popRecovery()
return val, ok
}
func (p *parser) parseRuleRefExpr(ref *ruleRefExpr) (interface{}, bool) {
if p.debug {
defer p.out(p.in("parseRuleRefExpr " + ref.name))
}
if ref.name == "" {
panic(fmt.Sprintf("%s: invalid rule: missing name", ref.pos))
}
rule := p.rules[ref.name]
if rule == nil {
p.addErr(fmt.Errorf("undefined rule: %s", ref.name))
return nil, false
}
return p.parseRule(rule)
}
func (p *parser) parseSeqExpr(seq *seqExpr) (interface{}, bool) {
if p.debug {
defer p.out(p.in("parseSeqExpr"))
}
vals := make([]interface{}, 0, len(seq.exprs))
pt := p.pt
state := p.cloneState()
for _, expr := range seq.exprs {
val, ok := p.parseExpr(expr)
if !ok {
p.restoreState(state)
p.restore(pt)
return nil, false
}
vals = append(vals, val)
}
return vals, true
}
func (p *parser) parseStateCodeExpr(state *stateCodeExpr) (interface{}, bool) {
if p.debug {
defer p.out(p.in("parseStateCodeExpr"))
}
err := state.run(p)
if err != nil {
p.addErr(err)
}
return nil, true
}
func (p *parser) parseThrowExpr(expr *throwExpr) (interface{}, bool) {
if p.debug {
defer p.out(p.in("parseThrowExpr"))
}
for i := len(p.recoveryStack) - 1; i >= 0; i-- {
if recoverExpr, ok := p.recoveryStack[i][expr.label]; ok {
if val, ok := p.parseExpr(recoverExpr); ok {
return val, ok
}
}
}
return nil, false
}
func (p *parser) parseZeroOrMoreExpr(expr *zeroOrMoreExpr) (interface{}, bool) {
if p.debug {
defer p.out(p.in("parseZeroOrMoreExpr"))
}
var vals []interface{}
for {
p.pushV()
val, ok := p.parseExpr(expr.expr)
p.popV()
if !ok {
return vals, true
}
vals = append(vals, val)
}
}
func (p *parser) parseZeroOrOneExpr(expr *zeroOrOneExpr) (interface{}, bool) {
if p.debug {
defer p.out(p.in("parseZeroOrOneExpr"))
}
p.pushV()
val, _ := p.parseExpr(expr.expr)
p.popV()
// whether it matched or not, consider it a match
return val, true
}
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