diff options
Diffstat (limited to 'src/urubu/spec/grammar/parser')
| -rw-r--r-- | src/urubu/spec/grammar/parser/clexspec.json | 1 | ||||
| -rw-r--r-- | src/urubu/spec/grammar/parser/lexer.go | 297 | ||||
| -rw-r--r-- | src/urubu/spec/grammar/parser/lexspec.json | 123 | ||||
| -rw-r--r-- | src/urubu/spec/grammar/parser/parser.go | 582 | ||||
| -rw-r--r-- | src/urubu/spec/grammar/parser/syntax_error.go | 45 | ||||
| -rw-r--r-- | src/urubu/spec/grammar/parser/vartan_lexer.go | 1339 |
6 files changed, 0 insertions, 2387 deletions
diff --git a/src/urubu/spec/grammar/parser/clexspec.json b/src/urubu/spec/grammar/parser/clexspec.json deleted file mode 100644 index d0ed3d3..0000000 --- a/src/urubu/spec/grammar/parser/clexspec.json +++ /dev/null @@ -1 +0,0 @@ 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diff --git a/src/urubu/spec/grammar/parser/lexer.go b/src/urubu/spec/grammar/parser/lexer.go deleted file mode 100644 index bd8a24f..0000000 --- a/src/urubu/spec/grammar/parser/lexer.go +++ /dev/null @@ -1,297 +0,0 @@ -//go:generate maleeni compile lexspec.json -o clexspec.json -//go:generate maleeni-go clexspec.json --package parser - -package parser - -import ( - _ "embed" - "fmt" - "io" - "regexp" - "strings" - - verr "urubu/error" -) - -type tokenKind string - -const ( - tokenKindKWFragment = tokenKind("fragment") - tokenKindID = tokenKind("id") - tokenKindTerminalPattern = tokenKind("terminal pattern") - tokenKindStringLiteral = tokenKind("string") - tokenKindColon = tokenKind(":") - tokenKindOr = tokenKind("|") - tokenKindSemicolon = tokenKind(";") - tokenKindLabelMarker = tokenKind("@") - tokenKindDirectiveMarker = tokenKind("#") - tokenKindExpantion = tokenKind("...") - tokenKindOrderedSymbolMarker = tokenKind("$") - tokenKindLParen = tokenKind("(") - tokenKindRParen = tokenKind(")") - tokenKindNewline = tokenKind("newline") - tokenKindEOF = tokenKind("eof") - tokenKindInvalid = tokenKind("invalid") -) - -var ( - reIDChar = regexp.MustCompile(`^[0-9a-z_]+$`) - reIDInvalidDigitsPos = regexp.MustCompile(`^[0-9]`) -) - -type Position struct { - Row int - Col int -} - -func newPosition(row, col int) Position { - return Position{ - Row: row, - Col: col, - } -} - -type token struct { - kind tokenKind - text string - pos Position -} - -func newSymbolToken(kind tokenKind, pos Position) *token { - return &token{ - kind: kind, - pos: pos, - } -} - -func newIDToken(text string, pos Position) *token { - return &token{ - kind: tokenKindID, - text: text, - pos: pos, - } -} - -func newTerminalPatternToken(text string, pos Position) *token { - return &token{ - kind: tokenKindTerminalPattern, - text: text, - pos: pos, - } -} - -func newStringLiteralToken(text string, pos Position) *token { - return &token{ - kind: tokenKindStringLiteral, - text: text, - pos: pos, - } -} - -func newEOFToken() *token { - return &token{ - kind: tokenKindEOF, - } -} - -func newInvalidToken(text string, pos Position) *token { - return &token{ - kind: tokenKindInvalid, - text: text, - pos: pos, - } -} - -type lexer struct { - d *Lexer - buf *token -} - -func newLexer(src io.Reader) (*lexer, error) { - d, err := NewLexer(NewLexSpec(), src) - if err != nil { - return nil, err - } - return &lexer{ - d: d, - }, nil -} - -func (l *lexer) next() (*token, error) { - if l.buf != nil { - tok := l.buf - l.buf = nil - return tok, nil - } - - var newline *token - for { - tok, err := l.lexAndSkipWSs() - if err != nil { - return nil, err - } - if tok.kind == tokenKindNewline { - newline = tok - continue - } - - if newline != nil { - l.buf = tok - return newline, nil - } - return tok, nil - } -} - -func (l *lexer) lexAndSkipWSs() (*token, error) { - var tok *Token - for { - var err error - tok, err = l.d.Next() - if err != nil { - return nil, err - } - if tok.Invalid { - return newInvalidToken(string(tok.Lexeme), newPosition(tok.Row+1, tok.Col+1)), nil - } - if tok.EOF { - return newEOFToken(), nil - } - switch tok.KindID { - case KindIDWhiteSpace: - continue - case KindIDLineComment: - continue - } - - break - } - - switch tok.KindID { - case KindIDNewline: - return newSymbolToken(tokenKindNewline, newPosition(tok.Row+1, tok.Col+1)), nil - case KindIDKwFragment: - return newSymbolToken(tokenKindKWFragment, newPosition(tok.Row+1, tok.Col+1)), nil - case KindIDIdentifier: - if !reIDChar.Match(tok.Lexeme) { - return nil, &verr.SpecError{ - Cause: synErrIDInvalidChar, - Detail: string(tok.Lexeme), - Row: tok.Row + 1, - Col: tok.Col + 1, - } - } - if strings.HasPrefix(string(tok.Lexeme), "_") || strings.HasSuffix(string(tok.Lexeme), "_") { - return nil, &verr.SpecError{ - Cause: synErrIDInvalidUnderscorePos, - Detail: string(tok.Lexeme), - Row: tok.Row + 1, - Col: tok.Col + 1, - } - } - if strings.Contains(string(tok.Lexeme), "__") { - return nil, &verr.SpecError{ - Cause: synErrIDConsecutiveUnderscores, - Detail: string(tok.Lexeme), - Row: tok.Row + 1, - Col: tok.Col + 1, - } - } - if reIDInvalidDigitsPos.Match(tok.Lexeme) { - return nil, &verr.SpecError{ - Cause: synErrIDInvalidDigitsPos, - Detail: string(tok.Lexeme), - Row: tok.Row + 1, - Col: tok.Col + 1, - } - } - return newIDToken(string(tok.Lexeme), newPosition(tok.Row+1, tok.Col+1)), nil - case KindIDTerminalOpen: - var b strings.Builder - for { - tok, err := l.d.Next() - if err != nil { - return nil, err - } - if tok.EOF { - return nil, &verr.SpecError{ - Cause: synErrUnclosedTerminal, - Row: tok.Row + 1, - Col: tok.Col + 1, - } - } - switch tok.KindID { - case KindIDPattern: - // The escape sequences in a pattern string are interpreted by the lexer, except for the \". - // We must interpret the \" before passing them to the lexer because they are delimiters for - // the pattern strings. - fmt.Fprint(&b, strings.ReplaceAll(string(tok.Lexeme), `\"`, `"`)) - case KindIDEscapeSymbol: - return nil, &verr.SpecError{ - Cause: synErrIncompletedEscSeq, - Row: tok.Row + 1, - Col: tok.Col + 1, - } - case KindIDTerminalClose: - pat := b.String() - if pat == "" { - return nil, &verr.SpecError{ - Cause: synErrEmptyPattern, - Row: tok.Row + 1, - Col: tok.Col + 1, - } - } - return newTerminalPatternToken(pat, newPosition(tok.Row+1, tok.Col+1)), nil - } - } - case KindIDStringLiteralOpen: - var b strings.Builder - for { - tok, err := l.d.Next() - if err != nil { - return nil, err - } - if tok.EOF { - return nil, &verr.SpecError{ - Cause: synErrUnclosedString, - Row: tok.Row + 1, - Col: tok.Col + 1, - } - } - switch tok.KindID { - case KindIDCharSeq: - fmt.Fprint(&b, string(tok.Lexeme)) - case KindIDStringLiteralClose: - str := b.String() - if str == "" { - return nil, &verr.SpecError{ - Cause: synErrEmptyString, - Row: tok.Row + 1, - Col: tok.Col + 1, - } - } - return newStringLiteralToken(str, newPosition(tok.Row+1, tok.Col+1)), nil - } - } - case KindIDColon: - return newSymbolToken(tokenKindColon, newPosition(tok.Row+1, tok.Col+1)), nil - case KindIDOr: - return newSymbolToken(tokenKindOr, newPosition(tok.Row+1, tok.Col+1)), nil - case KindIDSemicolon: - return newSymbolToken(tokenKindSemicolon, newPosition(tok.Row+1, tok.Col+1)), nil - case KindIDLabelMarker: - return newSymbolToken(tokenKindLabelMarker, newPosition(tok.Row+1, tok.Col+1)), nil - case KindIDDirectiveMarker: - return newSymbolToken(tokenKindDirectiveMarker, newPosition(tok.Row+1, tok.Col+1)), nil - case KindIDExpansion: - return newSymbolToken(tokenKindExpantion, newPosition(tok.Row+1, tok.Col+1)), nil - case KindIDOrderedSymbolMarker: - return newSymbolToken(tokenKindOrderedSymbolMarker, newPosition(tok.Row+1, tok.Col+1)), nil - case KindIDLParen: - return newSymbolToken(tokenKindLParen, newPosition(tok.Row+1, tok.Col+1)), nil - case KindIDRParen: - return newSymbolToken(tokenKindRParen, newPosition(tok.Row+1, tok.Col+1)), nil - default: - return newInvalidToken(string(tok.Lexeme), newPosition(tok.Row+1, tok.Col+1)), nil - } -} diff --git a/src/urubu/spec/grammar/parser/lexspec.json b/src/urubu/spec/grammar/parser/lexspec.json deleted file mode 100644 index caf1f0e..0000000 --- a/src/urubu/spec/grammar/parser/lexspec.json +++ /dev/null @@ -1,123 +0,0 @@ -{ - "name": "vartan", - "entries": [ - { - "fragment": true, - "kind": "lf", - "pattern": "\\u{000A}" - }, - { - "fragment": true, - "kind": "cr", - "pattern": "\\u{000D}" - }, - { - "fragment": true, - "kind": "ht", - "pattern": "\\u{0009}" - }, - { - "fragment": true, - "kind": "sp", - "pattern": "\\u{0020}" - }, - { - "fragment": true, - "kind": "newline", - "pattern": "\\f{lf}|\\f{cr}|\\f{cr}\\f{lf}" - }, - { - "kind": "white_space", - "pattern": "(\\f{ht}|\\f{sp})+" - }, - { - "kind": "newline", - "pattern": "\\f{newline}" - }, - { - "kind": "line_comment", - "pattern": "//[^\\u{000A}\\u{000D}]*" - }, - { - "kind": "kw_fragment", - "pattern": "fragment" - }, - { - "kind": "identifier", - "pattern": "[0-9A-Za-z_]+" - }, - { - "kind": "terminal_open", - "pattern": "\"", - "push": "terminal" - }, - { - "modes": ["terminal"], - "kind": "pattern", - "pattern": "([^\"\\\\]|\\\\.)+" - }, - { - "modes": ["terminal"], - "kind": "escape_symbol", - "pattern": "\\\\" - }, - { - "modes": ["terminal"], - "kind": "terminal_close", - "pattern": "\"", - "pop": true - }, - { - "kind": "string_literal_open", - "pattern": "'", - "push": "string_literal" - }, - { - "modes": ["string_literal"], - "kind": "char_seq", - "pattern": "[^']+" - }, - { - "modes": ["string_literal"], - "kind": "string_literal_close", - "pattern": "'", - "pop": true - }, - { - "kind": "colon", - "pattern": ":" - }, - { - "kind": "or", - "pattern": "\\|" - }, - { - "kind": "semicolon", - "pattern": ";" - }, - { - "kind": "label_marker", - "pattern": "@" - }, - { - "kind": "expansion", - "pattern": "\\.\\.\\." - }, - { - "kind": "directive_marker", - "pattern": "#" - }, - { - "kind": "ordered_symbol_marker", - "pattern": "$" - }, - { - "kind": "l_paren", - "pattern": "\\(" - }, - { - "kind": "r_paren", - "pattern": "\\)" - } - ] -} diff --git a/src/urubu/spec/grammar/parser/parser.go b/src/urubu/spec/grammar/parser/parser.go deleted file mode 100644 index b604074..0000000 --- a/src/urubu/spec/grammar/parser/parser.go +++ /dev/null @@ -1,582 +0,0 @@ -package parser - -import ( - "fmt" - "io" - - verr "urubu/error" - spec "urubu/spec/grammar" -) - -type RootNode struct { - Directives []*DirectiveNode - Productions []*ProductionNode - LexProductions []*ProductionNode - Fragments []*FragmentNode -} - -type ProductionNode struct { - Directives []*DirectiveNode - LHS string - RHS []*AlternativeNode - Pos Position -} - -func (n *ProductionNode) isLexical() bool { - if len(n.RHS) == 1 && len(n.RHS[0].Elements) == 1 && n.RHS[0].Elements[0].Pattern != "" { - return true - } - return false -} - -type AlternativeNode struct { - Elements []*ElementNode - Directives []*DirectiveNode - Pos Position -} - -type ElementNode struct { - ID string - Pattern string - Label *LabelNode - Literally bool - Pos Position -} - -type LabelNode struct { - Name string - Pos Position -} - -type DirectiveNode struct { - Name string - Parameters []*ParameterNode - Pos Position -} - -type ParameterNode struct { - ID string - Pattern string - String string - OrderedSymbol string - Group []*DirectiveNode - Expansion bool - Pos Position -} - -type FragmentNode struct { - LHS string - RHS string - Pos Position -} - -func raiseSyntaxError(row int, synErr *SyntaxError) { - panic(&verr.SpecError{ - Cause: synErr, - Row: row, - }) -} - -func raiseSyntaxErrorWithDetail(row int, synErr *SyntaxError, detail string) { - panic(&verr.SpecError{ - Cause: synErr, - Detail: detail, - Row: row, - }) -} - -func Parse(src io.Reader) (*RootNode, error) { - p, err := newParser(src) - if err != nil { - return nil, err - } - - return p.parse() -} - -type parser struct { - lex *lexer - peekedTok *token - lastTok *token - errs verr.SpecErrors - - // A token position that the parser read at last. - // It is used as additional information in error messages. - pos Position -} - -func newParser(src io.Reader) (*parser, error) { - lex, err := newLexer(src) - if err != nil { - return nil, err - } - return &parser{ - lex: lex, - }, nil -} - -func (p *parser) parse() (root *RootNode, retErr error) { - root = p.parseRoot() - if len(p.errs) > 0 { - return nil, p.errs - } - - return root, nil -} - -func (p *parser) parseRoot() *RootNode { - defer func() { - err := recover() - if err != nil { - specErr, ok := err.(*verr.SpecError) - if !ok { - panic(fmt.Errorf("an unexpected error occurred: %v", err)) - } - p.errs = append(p.errs, specErr) - } - }() - - var dirs []*DirectiveNode - var prods []*ProductionNode - var lexProds []*ProductionNode - var fragments []*FragmentNode - for { - dir := p.parseTopLevelDirective() - if dir != nil { - dirs = append(dirs, dir) - continue - } - - fragment := p.parseFragment() - if fragment != nil { - fragments = append(fragments, fragment) - continue - } - - prod := p.parseProduction() - if prod != nil { - if prod.isLexical() { - lexProds = append(lexProds, prod) - } else { - prods = append(prods, prod) - } - continue - } - - if p.consume(tokenKindEOF) { - break - } - } - - return &RootNode{ - Directives: dirs, - Productions: prods, - LexProductions: lexProds, - Fragments: fragments, - } -} - -func (p *parser) parseTopLevelDirective() *DirectiveNode { - defer func() { - err := recover() - if err == nil { - return - } - - specErr, ok := err.(*verr.SpecError) - if !ok { - panic(err) - } - - p.errs = append(p.errs, specErr) - p.skipOverTo(tokenKindSemicolon) - }() - - dir := p.parseDirective() - if dir == nil { - return nil - } - - p.consume(tokenKindNewline) - - if !p.consume(tokenKindSemicolon) { - raiseSyntaxError(p.pos.Row, synErrTopLevelDirNoSemicolon) - } - - return dir -} - -func (p *parser) parseFragment() *FragmentNode { - defer func() { - err := recover() - if err == nil { - return - } - - specErr, ok := err.(*verr.SpecError) - if !ok { - panic(err) - } - - p.errs = append(p.errs, specErr) - p.skipOverTo(tokenKindSemicolon) - }() - - p.consume(tokenKindNewline) - - if !p.consume(tokenKindKWFragment) { - return nil - } - - p.consume(tokenKindNewline) - - if !p.consume(tokenKindID) { - raiseSyntaxError(p.pos.Row, synErrNoProductionName) - } - lhs := p.lastTok.text - lhsPos := p.lastTok.pos - - p.consume(tokenKindNewline) - - if !p.consume(tokenKindColon) { - raiseSyntaxError(p.pos.Row, synErrNoColon) - } - - var rhs string - switch { - case p.consume(tokenKindTerminalPattern): - rhs = p.lastTok.text - case p.consume(tokenKindStringLiteral): - rhs = spec.EscapePattern(p.lastTok.text) - default: - raiseSyntaxError(p.pos.Row, synErrFragmentNoPattern) - } - - p.consume(tokenKindNewline) - - if !p.consume(tokenKindSemicolon) { - raiseSyntaxError(p.pos.Row, synErrNoSemicolon) - } - - if !p.consume(tokenKindNewline) { - if !p.consume(tokenKindEOF) { - raiseSyntaxError(p.pos.Row, synErrSemicolonNoNewline) - } - } - - return &FragmentNode{ - LHS: lhs, - RHS: rhs, - Pos: lhsPos, - } -} - -func (p *parser) parseProduction() *ProductionNode { - defer func() { - err := recover() - if err == nil { - return - } - - specErr, ok := err.(*verr.SpecError) - if !ok { - panic(err) - } - - p.errs = append(p.errs, specErr) - p.skipOverTo(tokenKindSemicolon) - }() - - p.consume(tokenKindNewline) - - if p.consume(tokenKindEOF) { - return nil - } - - if !p.consume(tokenKindID) { - raiseSyntaxError(p.pos.Row, synErrNoProductionName) - } - lhs := p.lastTok.text - lhsPos := p.lastTok.pos - - var dirs []*DirectiveNode - for { - dir := p.parseDirective() - if dir == nil { - break - } - dirs = append(dirs, dir) - } - - p.consume(tokenKindNewline) - - if !p.consume(tokenKindColon) { - raiseSyntaxError(p.pos.Row, synErrNoColon) - } - - alt := p.parseAlternative() - rhs := []*AlternativeNode{alt} - for { - p.consume(tokenKindNewline) - - if !p.consume(tokenKindOr) { - break - } - alt := p.parseAlternative() - rhs = append(rhs, alt) - } - - p.consume(tokenKindNewline) - - if !p.consume(tokenKindSemicolon) { - raiseSyntaxError(p.pos.Row, synErrNoSemicolon) - } - - if !p.consume(tokenKindNewline) { - if !p.consume(tokenKindEOF) { - raiseSyntaxError(p.pos.Row, synErrSemicolonNoNewline) - } - } - - prod := &ProductionNode{ - Directives: dirs, - LHS: lhs, - RHS: rhs, - Pos: lhsPos, - } - - // Vartan's driver must provide a user with the names of expected tokens when a syntax error occurs. - // However, if a pattern appears directly in an alternative, Vartan's compiler cannot assign an appropriate - // name to the pattern. Therefore, this code prohibits alternatives from containing patterns. - if !prod.isLexical() { - for _, alt := range prod.RHS { - for _, elem := range alt.Elements { - if elem.Pattern != "" { - raiseSyntaxError(elem.Pos.Row, synErrPatternInAlt) - } - } - } - } - - return prod -} - -func (p *parser) parseAlternative() *AlternativeNode { - elems := []*ElementNode{} - for { - elem := p.parseElement() - if elem == nil { - break - } - elems = append(elems, elem) - } - - // When a length of an alternative is zero, we cannot set a position. - var firstElemPos Position - if len(elems) > 0 { - firstElemPos = elems[0].Pos - } - - var dirs []*DirectiveNode - for { - dir := p.parseDirective() - if dir == nil { - break - } - dirs = append(dirs, dir) - } - - return &AlternativeNode{ - Elements: elems, - Directives: dirs, - Pos: firstElemPos, - } -} - -func (p *parser) parseElement() *ElementNode { - var elem *ElementNode - switch { - case p.consume(tokenKindID): - elem = &ElementNode{ - ID: p.lastTok.text, - Pos: p.lastTok.pos, - } - case p.consume(tokenKindTerminalPattern): - elem = &ElementNode{ - Pattern: p.lastTok.text, - Pos: p.lastTok.pos, - } - case p.consume(tokenKindStringLiteral): - elem = &ElementNode{ - Pattern: p.lastTok.text, - Literally: true, - Pos: p.lastTok.pos, - } - default: - if p.consume(tokenKindLabelMarker) { - raiseSyntaxError(p.pos.Row, synErrLabelWithNoSymbol) - } - return nil - } - if p.consume(tokenKindLabelMarker) { - if !p.consume(tokenKindID) { - raiseSyntaxError(p.pos.Row, synErrNoLabel) - } - elem.Label = &LabelNode{ - Name: p.lastTok.text, - Pos: p.lastTok.pos, - } - } - return elem -} - -func (p *parser) parseDirective() *DirectiveNode { - p.consume(tokenKindNewline) - - if !p.consume(tokenKindDirectiveMarker) { - return nil - } - dirPos := p.lastTok.pos - - if !p.consume(tokenKindID) { - raiseSyntaxError(p.pos.Row, synErrNoDirectiveName) - } - name := p.lastTok.text - - var params []*ParameterNode - for { - param := p.parseParameter() - if param == nil { - break - } - params = append(params, param) - } - - return &DirectiveNode{ - Name: name, - Parameters: params, - Pos: dirPos, - } -} - -func (p *parser) parseParameter() *ParameterNode { - var param *ParameterNode - switch { - case p.consume(tokenKindID): - param = &ParameterNode{ - ID: p.lastTok.text, - Pos: p.lastTok.pos, - } - case p.consume(tokenKindTerminalPattern): - param = &ParameterNode{ - Pattern: p.lastTok.text, - Pos: p.lastTok.pos, - } - case p.consume(tokenKindStringLiteral): - param = &ParameterNode{ - String: p.lastTok.text, - Pos: p.lastTok.pos, - } - case p.consume(tokenKindOrderedSymbolMarker): - if !p.consume(tokenKindID) { - raiseSyntaxError(p.pos.Row, synErrNoOrderedSymbolName) - } - param = &ParameterNode{ - OrderedSymbol: p.lastTok.text, - Pos: p.lastTok.pos, - } - case p.consume(tokenKindLParen): - pos := p.lastTok.pos - var g []*DirectiveNode - for { - dir := p.parseDirective() - if dir == nil { - break - } - g = append(g, dir) - } - if !p.consume(tokenKindRParen) { - raiseSyntaxError(p.pos.Row, synErrUnclosedDirGroup) - } - if len(g) == 0 { - // Set an empty slice representing an empty directive group to distinguish between the following two cases. - // - // - #prec (); // vartan allows this case. - // - #prec; // This case will raise an error. - g = []*DirectiveNode{} - } - param = &ParameterNode{ - Group: g, - Pos: pos, - } - } - if p.consume(tokenKindExpantion) { - switch { - case param == nil: - raiseSyntaxError(p.pos.Row, synErrStrayExpOp) - case param.ID == "": - raiseSyntaxError(p.pos.Row, synErrInvalidExpOperand) - } - param.Expansion = true - } - return param -} - -func (p *parser) consume(expected tokenKind) bool { - var tok *token - var err error - if p.peekedTok != nil { - tok = p.peekedTok - p.peekedTok = nil - } else { - tok, err = p.lex.next() - if err != nil { - panic(err) - } - } - p.pos = tok.pos - if tok.kind == tokenKindInvalid { - raiseSyntaxErrorWithDetail(p.pos.Row, synErrInvalidToken, tok.text) - } - if tok.kind == expected { - p.lastTok = tok - return true - } - p.peekedTok = tok - - return false -} - -func (p *parser) skip() { - var tok *token - var err error - for { - if p.peekedTok != nil { - tok = p.peekedTok - p.peekedTok = nil - } else { - tok, err = p.lex.next() - if err != nil { - p.errs = append(p.errs, &verr.SpecError{ - Cause: err, - Row: p.pos.Row, - }) - continue - } - } - - break - } - - p.lastTok = tok - p.pos = tok.pos -} - -func (p *parser) skipOverTo(kind tokenKind) { - for { - if p.consume(kind) || p.consume(tokenKindEOF) { - return - } - p.skip() - } -} diff --git a/src/urubu/spec/grammar/parser/syntax_error.go b/src/urubu/spec/grammar/parser/syntax_error.go deleted file mode 100644 index 719fb94..0000000 --- a/src/urubu/spec/grammar/parser/syntax_error.go +++ /dev/null @@ -1,45 +0,0 @@ -package parser - -type SyntaxError struct { - message string -} - -func newSyntaxError(message string) *SyntaxError { - return &SyntaxError{ - message: message, - } -} - -func (e *SyntaxError) Error() string { - return e.message -} - -var ( - // lexical errors - synErrIDInvalidChar = newSyntaxError("an identifier can contain only the lower-case letter, the digits, and the underscore") - synErrIDInvalidUnderscorePos = newSyntaxError("the underscore cannot be placed at the beginning or end of an identifier") - synErrIDConsecutiveUnderscores = newSyntaxError("the underscore cannot be placed consecutively") - synErrIDInvalidDigitsPos = newSyntaxError("the digits cannot be placed at the biginning of an identifier") - synErrUnclosedTerminal = newSyntaxError("unclosed terminal") - synErrUnclosedString = newSyntaxError("unclosed string") - synErrIncompletedEscSeq = newSyntaxError("incompleted escape sequence; unexpected EOF following a backslash") - synErrEmptyPattern = newSyntaxError("a pattern must include at least one character") - synErrEmptyString = newSyntaxError("a string must include at least one character") - - // syntax errors - synErrInvalidToken = newSyntaxError("invalid token") - synErrTopLevelDirNoSemicolon = newSyntaxError("a top-level directive must be followed by ;") - synErrNoProductionName = newSyntaxError("a production name is missing") - synErrNoColon = newSyntaxError("the colon must precede alternatives") - synErrNoSemicolon = newSyntaxError("the semicolon is missing at the last of an alternative") - synErrLabelWithNoSymbol = newSyntaxError("a label must follow a symbol") - synErrNoLabel = newSyntaxError("an identifier that represents a label is missing after the label marker @") - synErrNoDirectiveName = newSyntaxError("a directive needs a name") - synErrNoOrderedSymbolName = newSyntaxError("an ordered symbol name is missing") - synErrUnclosedDirGroup = newSyntaxError("a directive group must be closed by )") - synErrPatternInAlt = newSyntaxError("a pattern literal cannot appear directly in an alternative. instead, please define a terminal symbol with the pattern literal") - synErrStrayExpOp = newSyntaxError("an expansion operator ... must be preceded by an identifier") - synErrInvalidExpOperand = newSyntaxError("an expansion operator ... can be applied to only an identifier") - synErrSemicolonNoNewline = newSyntaxError("a semicolon must be followed by a newline") - synErrFragmentNoPattern = newSyntaxError("a fragment needs one pattern element") -) diff --git a/src/urubu/spec/grammar/parser/vartan_lexer.go b/src/urubu/spec/grammar/parser/vartan_lexer.go deleted file mode 100644 index 76ddfde..0000000 --- a/src/urubu/spec/grammar/parser/vartan_lexer.go +++ /dev/null @@ -1,1339 +0,0 @@ -// Code generated by maleeni-go. DO NOT EDIT. -package parser - -import ( - "fmt" - "io" - "io/ioutil" -) - -type ModeID int - -func (id ModeID) Int() int { - return int(id) -} - -type StateID int - -func (id StateID) Int() int { - return int(id) -} - -type KindID int - -func (id KindID) Int() int { - return int(id) -} - -type ModeKindID int - -func (id ModeKindID) Int() int { - return int(id) -} - -type LexSpec interface { - InitialMode() ModeID - Pop(mode ModeID, modeKind ModeKindID) bool - Push(mode ModeID, modeKind ModeKindID) (ModeID, bool) - ModeName(mode ModeID) string - InitialState(mode ModeID) StateID - NextState(mode ModeID, state StateID, v int) (StateID, bool) - Accept(mode ModeID, state StateID) (ModeKindID, bool) - KindIDAndName(mode ModeID, modeKind ModeKindID) (KindID, string) -} - -// Token representes a token. -type Token struct { - // ModeID is an ID of a lex mode. - ModeID ModeID - - // KindID is an ID of a kind. This is unique among all modes. - KindID KindID - - // ModeKindID is an ID of a lexical kind. This is unique only within a mode. - // Note that you need to use KindID field if you want to identify a kind across all modes. - ModeKindID ModeKindID - - // Row is a row number where a lexeme appears. - Row int - - // Col is a column number where a lexeme appears. - // Note that Col is counted in code points, not bytes. - Col int - - // Lexeme is a byte sequence matched a pattern of a lexical specification. - Lexeme []byte - - // When this field is true, it means the token is the EOF token. - EOF bool - - // When this field is true, it means the token is an error token. - Invalid bool -} - -type LexerOption func(l *Lexer) error - -// DisableModeTransition disables the active mode transition. Thus, even if the lexical specification has the push and pop -// operations, the lexer doesn't perform these operations. When the lexical specification has multiple modes, and this option is -// enabled, you need to call the Lexer.Push and Lexer.Pop methods to perform the mode transition. You can use the Lexer.Mode method -// to know the current lex mode. -func DisableModeTransition() LexerOption { - return func(l *Lexer) error { - l.passiveModeTran = true - return nil - } -} - -type Lexer struct { - spec LexSpec - src []byte - srcPtr int - row int - col int - prevRow int - prevCol int - tokBuf []*Token - modeStack []ModeID - passiveModeTran bool -} - -// NewLexer returns a new lexer. -func NewLexer(spec LexSpec, src io.Reader, opts ...LexerOption) (*Lexer, error) { - b, err := ioutil.ReadAll(src) - if err != nil { - return nil, err - } - l := &Lexer{ - spec: spec, - src: b, - srcPtr: 0, - row: 0, - col: 0, - modeStack: []ModeID{ - spec.InitialMode(), - }, - passiveModeTran: false, - } - for _, opt := range opts { - err := opt(l) - if err != nil { - return nil, err - } - } - - return l, nil -} - -// Next returns a next token. -func (l *Lexer) Next() (*Token, error) { - if len(l.tokBuf) > 0 { - tok := l.tokBuf[0] - l.tokBuf = l.tokBuf[1:] - return tok, nil - } - - tok, err := l.nextAndTransition() - if err != nil { - return nil, err - } - if !tok.Invalid { - return tok, nil - } - errTok := tok - for { - tok, err = l.nextAndTransition() - if err != nil { - return nil, err - } - if !tok.Invalid { - break - } - errTok.Lexeme = append(errTok.Lexeme, tok.Lexeme...) - } - l.tokBuf = append(l.tokBuf, tok) - - return errTok, nil -} - -func (l *Lexer) nextAndTransition() (*Token, error) { - tok, err := l.next() - if err != nil { - return nil, err - } - if tok.EOF || tok.Invalid { - return tok, nil - } - if l.passiveModeTran { - return tok, nil - } - mode := l.Mode() - if l.spec.Pop(mode, tok.ModeKindID) { - err := l.PopMode() - if err != nil { - return nil, err - } - } - if mode, ok := l.spec.Push(mode, tok.ModeKindID); ok { - l.PushMode(mode) - } - // The checking length of the mode stack must be at after pop and push operations because those operations can be performed - // at the same time. When the mode stack has just one element and popped it, the mode stack will be temporarily emptied. - // However, since a push operation may be performed immediately after it, the lexer allows the stack to be temporarily empty. - if len(l.modeStack) == 0 { - return nil, fmt.Errorf("a mode stack must have at least one element") - } - return tok, nil -} - -func (l *Lexer) next() (*Token, error) { - mode := l.Mode() - state := l.spec.InitialState(mode) - buf := []byte{} - unfixedBufLen := 0 - row := l.row - col := l.col - var tok *Token - for { - v, eof := l.read() - if eof { - if tok != nil { - l.unread(unfixedBufLen) - return tok, nil - } - // When `buf` has unaccepted data and reads the EOF, the lexer treats the buffered data as an invalid token. - if len(buf) > 0 { - return &Token{ - ModeID: mode, - ModeKindID: 0, - Lexeme: buf, - Row: row, - Col: col, - Invalid: true, - }, nil - } - return &Token{ - ModeID: mode, - ModeKindID: 0, - Row: 0, - Col: 0, - EOF: true, - }, nil - } - buf = append(buf, v) - unfixedBufLen++ - nextState, ok := l.spec.NextState(mode, state, int(v)) - if !ok { - if tok != nil { - l.unread(unfixedBufLen) - return tok, nil - } - return &Token{ - ModeID: mode, - ModeKindID: 0, - Lexeme: buf, - Row: row, - Col: col, - Invalid: true, - }, nil - } - state = nextState - if modeKindID, ok := l.spec.Accept(mode, state); ok { - kindID, _ := l.spec.KindIDAndName(mode, modeKindID) - tok = &Token{ - ModeID: mode, - KindID: kindID, - ModeKindID: modeKindID, - Lexeme: buf, - Row: row, - Col: col, - } - unfixedBufLen = 0 - } - } -} - -// Mode returns the current lex mode. -func (l *Lexer) Mode() ModeID { - return l.modeStack[len(l.modeStack)-1] -} - -// PushMode adds a lex mode onto the mode stack. -func (l *Lexer) PushMode(mode ModeID) { - l.modeStack = append(l.modeStack, mode) -} - -// PopMode removes a lex mode from the top of the mode stack. -func (l *Lexer) PopMode() error { - sLen := len(l.modeStack) - if sLen == 0 { - return fmt.Errorf("cannot pop a lex mode from a lex mode stack any more") - } - l.modeStack = l.modeStack[:sLen-1] - return nil -} - -func (l *Lexer) read() (byte, bool) { - if l.srcPtr >= len(l.src) { - return 0, true - } - - b := l.src[l.srcPtr] - l.srcPtr++ - - l.prevRow = l.row - l.prevCol = l.col - - // Count the token positions. - // The driver treats LF as the end of lines and counts columns in code points, not bytes. - // To count in code points, we refer to the First Byte column in the Table 3-6. - // - // Reference: - // - [Table 3-6] https://www.unicode.org/versions/Unicode13.0.0/ch03.pdf > Table 3-6. UTF-8 Bit Distribution - if b < 128 { - // 0x0A is LF. - if b == 0x0A { - l.row++ - l.col = 0 - } else { - l.col++ - } - } else if b>>5 == 6 || b>>4 == 14 || b>>3 == 30 { - l.col++ - } - - return b, false -} - -// We must not call this function consecutively to record the token position correctly. -func (l *Lexer) unread(n int) { - l.srcPtr -= n - - l.row = l.prevRow - l.col = l.prevCol -} - -const ( - ModeIDNil ModeID = 0 - ModeIDDefault ModeID = 1 - ModeIDTerminal ModeID = 2 - ModeIDStringLiteral ModeID = 3 -) - -const ( - ModeNameNil = "" - ModeNameDefault = "default" - ModeNameTerminal = "terminal" - ModeNameStringLiteral = "string_literal" -) - -// ModeIDToName converts a mode ID to a name. -func ModeIDToName(id ModeID) string { - switch id { - case ModeIDNil: - return ModeNameNil - case ModeIDDefault: - return ModeNameDefault - case ModeIDTerminal: - return ModeNameTerminal - case ModeIDStringLiteral: - return ModeNameStringLiteral - } - return "" -} - -const ( - KindIDNil KindID = 0 - KindIDWhiteSpace KindID = 1 - KindIDNewline KindID = 2 - KindIDLineComment KindID = 3 - KindIDKwFragment KindID = 4 - KindIDIdentifier KindID = 5 - KindIDTerminalOpen KindID = 6 - KindIDStringLiteralOpen KindID = 7 - KindIDColon KindID = 8 - KindIDOr KindID = 9 - KindIDSemicolon KindID = 10 - KindIDLabelMarker KindID = 11 - KindIDExpansion KindID = 12 - KindIDDirectiveMarker KindID = 13 - KindIDOrderedSymbolMarker KindID = 14 - KindIDLParen KindID = 15 - KindIDRParen KindID = 16 - KindIDPattern KindID = 17 - KindIDEscapeSymbol KindID = 18 - KindIDTerminalClose KindID = 19 - KindIDCharSeq KindID = 20 - KindIDStringLiteralClose KindID = 21 -) - -const ( - KindNameNil = "" - KindNameWhiteSpace = "white_space" - KindNameNewline = "newline" - KindNameLineComment = "line_comment" - KindNameKwFragment = "kw_fragment" - KindNameIdentifier = "identifier" - KindNameTerminalOpen = "terminal_open" - KindNameStringLiteralOpen = "string_literal_open" - KindNameColon = "colon" - KindNameOr = "or" - KindNameSemicolon = "semicolon" - KindNameLabelMarker = "label_marker" - KindNameExpansion = "expansion" - KindNameDirectiveMarker = "directive_marker" - KindNameOrderedSymbolMarker = "ordered_symbol_marker" - KindNameLParen = "l_paren" - KindNameRParen = "r_paren" - KindNamePattern = "pattern" - KindNameEscapeSymbol = "escape_symbol" - KindNameTerminalClose = "terminal_close" - KindNameCharSeq = "char_seq" - KindNameStringLiteralClose = "string_literal_close" -) - -// KindIDToName converts a kind ID to a name. -func KindIDToName(id KindID) string { - switch id { - case KindIDNil: - return KindNameNil - case KindIDWhiteSpace: - return KindNameWhiteSpace - case KindIDNewline: - return KindNameNewline - case KindIDLineComment: - return KindNameLineComment - case KindIDKwFragment: - return KindNameKwFragment - case KindIDIdentifier: - return KindNameIdentifier - case KindIDTerminalOpen: - return KindNameTerminalOpen - case KindIDStringLiteralOpen: - return KindNameStringLiteralOpen - case KindIDColon: - return KindNameColon - case KindIDOr: - return KindNameOr - case KindIDSemicolon: - return KindNameSemicolon - case KindIDLabelMarker: - return KindNameLabelMarker - case KindIDExpansion: - return KindNameExpansion - case KindIDDirectiveMarker: - return KindNameDirectiveMarker - case KindIDOrderedSymbolMarker: - return KindNameOrderedSymbolMarker - case KindIDLParen: - return KindNameLParen - case KindIDRParen: - return KindNameRParen - case KindIDPattern: - return KindNamePattern - case KindIDEscapeSymbol: - return KindNameEscapeSymbol - case KindIDTerminalClose: - return KindNameTerminalClose - case KindIDCharSeq: - return KindNameCharSeq - case KindIDStringLiteralClose: - return KindNameStringLiteralClose - } - return "" -} - -type lexSpec struct { - pop [][]bool - push [][]ModeID - modeNames []string - initialStates []StateID - acceptances [][]ModeKindID - kindIDs [][]KindID - kindNames []string - initialModeID ModeID - modeIDNil ModeID - modeKindIDNil ModeKindID - stateIDNil StateID - - rowNums [][]int - rowDisplacements [][]int - bounds [][]int - entries [][]StateID - originalColCounts []int -} - -func NewLexSpec() *lexSpec { - return &lexSpec{ - pop: [][]bool{ - nil, - { - false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, - }, - { - false, false, false, true, - }, - { - false, false, true, - }, - }, - push: [][]ModeID{ - nil, - { - 0, 0, 0, 0, 0, 0, 2, 3, 0, 0, 0, 0, 0, 0, 0, 0, 0, - }, - { - 0, 0, 0, 0, - }, - { - 0, 0, 0, - }, - }, - modeNames: []string{ - ModeNameNil, - ModeNameDefault, - ModeNameTerminal, - ModeNameStringLiteral, - }, - initialStates: []StateID{ - 0, - 1, - 1, - 1, - }, - acceptances: [][]ModeKindID{ - nil, - { - 0, 0, 1, 2, 0, 3, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, - 0, 0, 0, 0, 5, 5, 5, 5, 5, 5, 5, 4, 5, 0, 0, 2, 6, 7, 8, 9, - 10, 11, 12, 13, 14, 15, 16, - }, - { - 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, - 2, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, - 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, - 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 3, - }, - { - 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, - 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 2, - }, - }, - kindIDs: [][]KindID{ - nil, - { - KindIDNil, - KindIDWhiteSpace, - KindIDNewline, - KindIDLineComment, - KindIDKwFragment, - KindIDIdentifier, - KindIDTerminalOpen, - KindIDStringLiteralOpen, - KindIDColon, - KindIDOr, - KindIDSemicolon, - KindIDLabelMarker, - KindIDExpansion, - KindIDDirectiveMarker, - KindIDOrderedSymbolMarker, - KindIDLParen, - KindIDRParen, - }, - { - KindIDNil, - KindIDPattern, - KindIDEscapeSymbol, - KindIDTerminalClose, - }, - { - KindIDNil, - KindIDCharSeq, - KindIDStringLiteralClose, - }, - }, - kindNames: []string{ - KindNameNil, - KindNameWhiteSpace, - KindNameNewline, - KindNameLineComment, - KindNameKwFragment, - KindNameIdentifier, - KindNameTerminalOpen, - KindNameStringLiteralOpen, - KindNameColon, - KindNameOr, - KindNameSemicolon, - KindNameLabelMarker, - KindNameExpansion, - KindNameDirectiveMarker, - KindNameOrderedSymbolMarker, - KindNameLParen, - KindNameRParen, - KindNamePattern, - KindNameEscapeSymbol, - KindNameTerminalClose, - KindNameCharSeq, - KindNameStringLiteralClose, - }, - initialModeID: ModeIDDefault, - modeIDNil: ModeIDNil, - modeKindIDNil: 0, - stateIDNil: 0, - - rowNums: [][]int{ - nil, - { - 0, 1, 2, 3, 4, 5, 6, 7, 6, 8, 6, 9, 6, 10, 6, 11, 12, 6, 13, 14, - 6, 15, 16, 6, 17, 18, 19, 20, 21, 22, 23, 24, 24, 25, 26, 0, 0, 0, 0, 0, - 0, 0, 0, 0, 0, 0, 0, - }, - { - 0, 1, 2, 3, 2, 4, 2, 5, 2, 6, 2, 7, 8, 2, 9, 10, 2, 11, 12, 2, - 13, 2, 14, 2, 15, 2, 16, 2, 17, 2, 18, 19, 2, 20, 21, 2, 22, 23, 2, 24, - 2, 25, 2, 26, 2, 27, 2, 28, 2, 29, 30, 2, 31, 32, 2, 33, 34, 2, 35, 2, - 36, 2, 37, 2, 38, 2, 39, 2, 40, 41, 2, 42, 43, 2, 44, 45, 2, 0, - }, - { - 0, 1, 2, 3, 2, 4, 2, 5, 2, 6, 2, 7, 8, 2, 9, 10, 2, 11, 12, 2, - 13, 2, 14, 2, 15, 2, 16, 2, 17, 2, 18, 19, 2, 20, 21, 2, 22, 23, 2, 0, - }, - }, - rowDisplacements: [][]int{ - nil, - { - 0, 236, 1554, 1555, 1556, 0, 237, 1323, 301, 1387, 365, 1291, 429, 493, 557, 1419, 621, 765, 840, 915, - 990, 1065, 1140, 1215, 1290, 1558, 1559, - }, - { - 0, 0, 736, 2548, 852, 2612, 916, 2372, 980, 1044, 1108, 2839, 1172, 245, 2613, 1236, 2677, 1300, 2420, 1364, - 1428, 1492, 2855, 1556, 735, 2678, 1620, 2742, 1684, 2468, 1748, 1812, 1876, 2871, 1940, 490, 2743, 2004, 2807, 2068, - 2516, 2132, 2196, 2260, 2887, 2324, - }, - { - 0, 0, 246, 1194, 362, 1258, 426, 1114, 490, 554, 618, 1355, 682, 245, 1259, 746, 1323, 810, 1162, 874, - 938, 1002, 1371, 1066, - }, - }, - bounds: [][]int{ - nil, - { - 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, -1, 5, 5, -1, 5, 5, 5, 5, 5, 5, - 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, - 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, - 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, - 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, - 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, - 5, 5, 5, 5, 5, 5, 5, 5, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, - -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, - -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, - -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 5, 5, 5, 5, 5, 5, - 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, - 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, - 5, 5, 5, 5, 5, 1, 1, -1, -1, 1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, - -1, -1, -1, -1, -1, -1, -1, -1, 1, -1, 1, 1, 1, -1, -1, 1, 1, 1, -1, -1, - -1, -1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, -1, -1, -1, -1, - 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, - 1, 1, 1, 1, 1, 1, 1, -1, -1, -1, -1, 1, -1, 1, 1, 1, 1, 1, 1, 1, - 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, -1, - 1, -1, -1, -1, -1, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, - 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, - 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, - 6, 6, 6, 6, 6, 6, 6, 6, 6, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, - 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, - 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, - 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 10, 10, 10, 10, 10, 10, 10, - 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, - 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, - 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 12, 12, 12, - 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, - 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, - 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, - 12, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, - 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, - 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, - 13, 13, 13, 13, 13, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, - 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, - 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, - 14, 14, 14, 14, 14, 14, 14, 14, 14, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, - 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, - 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, - 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 17, 17, 17, 17, 17, 17, 17, - 17, 17, 17, -1, -1, -1, -1, -1, -1, -1, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, - 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, -1, -1, -1, -1, - 17, -1, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, - 17, 17, 17, 17, 17, 17, 17, 17, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, -1, -1, - -1, -1, -1, -1, -1, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, - 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, -1, -1, -1, -1, 18, -1, 18, 18, 18, - 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, - 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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, - 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, - 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, - 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, - 0, 0, 0, 0, 0, 0, 0, - }, - }, - originalColCounts: nil, - } -} - -func (s *lexSpec) InitialMode() ModeID { - return s.initialModeID -} - -func (s *lexSpec) Pop(mode ModeID, modeKind ModeKindID) bool { - return s.pop[mode][modeKind] -} - -func (s *lexSpec) Push(mode ModeID, modeKind ModeKindID) (ModeID, bool) { - id := s.push[mode][modeKind] - return id, id != s.modeIDNil -} - -func (s *lexSpec) ModeName(mode ModeID) string { - return s.modeNames[mode] -} - -func (s *lexSpec) InitialState(mode ModeID) StateID { - return s.initialStates[mode] -} - -func (s *lexSpec) NextState(mode ModeID, state StateID, v int) (StateID, bool) { - rowNum := s.rowNums[mode][state] - d := s.rowDisplacements[mode][rowNum] - if s.bounds[mode][d+v] != rowNum { - return s.stateIDNil, false - } - return s.entries[mode][d+v], true -} - -func (s *lexSpec) Accept(mode ModeID, state StateID) (ModeKindID, bool) { - id := s.acceptances[mode][state] - return id, id != s.modeKindIDNil -} - -func (s *lexSpec) KindIDAndName(mode ModeID, modeKind ModeKindID) (KindID, string) { - id := s.kindIDs[mode][modeKind] - return id, s.kindNames[id] -} |