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|
package grammar
import (
"strconv"
"strings"
)
type Terminal struct {
Number int `json:"number"`
Name string `json:"name"`
Pattern string `json:"pattern"`
Precedence int `json:"prec"`
Associativity string `json:"assoc"`
}
type NonTerminal struct {
Number int `json:"number"`
Name string `json:"name"`
}
type Production struct {
Number int `json:"number"`
LHS int `json:"lhs"`
RHS []int `json:"rhs"`
Precedence int `json:"prec"`
Associativity string `json:"assoc"`
}
type Item struct {
Production int `json:"production"`
Dot int `json:"dot"`
}
type Transition struct {
Symbol int `json:"symbol"`
State int `json:"state"`
}
type Reduce struct {
LookAhead []int `json:"look_ahead"`
Production int `json:"production"`
}
type SRConflict struct {
Symbol int `json:"symbol"`
State int `json:"state"`
Production int `json:"production"`
AdoptedState *int `json:"adopted_state"`
AdoptedProduction *int `json:"adopted_production"`
ResolvedBy int `json:"resolved_by"`
}
type RRConflict struct {
Symbol int `json:"symbol"`
Production1 int `json:"production_1"`
Production2 int `json:"production_2"`
AdoptedProduction int `json:"adopted_production"`
ResolvedBy int `json:"resolved_by"`
}
type State struct {
Number int `json:"number"`
Kernel []*Item `json:"kernel"`
Shift []*Transition `json:"shift"`
Reduce []*Reduce `json:"reduce"`
GoTo []*Transition `json:"goto"`
SRConflict []*SRConflict `json:"sr_conflict"`
RRConflict []*RRConflict `json:"rr_conflict"`
}
type Report struct {
Terminals []*Terminal `json:"terminals"`
NonTerminals []*NonTerminal `json:"non_terminals"`
Productions []*Production `json:"productions"`
States []*State `json:"states"`
}
type CompiledGrammar struct {
Name string `json:"name"`
Lexical *LexicalSpec `json:"lexical"`
Syntactic *SyntacticSpec `json:"syntactic"`
ASTAction *ASTAction `json:"ast_action"`
}
// StateID represents an ID of a state of a transition table.
type StateID int
const (
// StateIDNil represents an empty entry of a transition table.
// When the driver reads this value, it raises an error meaning lexical analysis failed.
StateIDNil = StateID(0)
// StateIDMin is the minimum value of the state ID. All valid state IDs are represented as
// sequential numbers starting from this value.
StateIDMin = StateID(1)
)
func (id StateID) Int() int {
return int(id)
}
// LexModeID represents an ID of a lex mode.
type LexModeID int
const (
LexModeIDNil = LexModeID(0)
LexModeIDDefault = LexModeID(1)
)
func (n LexModeID) String() string {
return strconv.Itoa(int(n))
}
func (n LexModeID) Int() int {
return int(n)
}
func (n LexModeID) IsNil() bool {
return n == LexModeIDNil
}
// LexModeName represents a name of a lex mode.
type LexModeName string
const (
LexModeNameNil = LexModeName("")
LexModeNameDefault = LexModeName("default")
)
func (m LexModeName) String() string {
return string(m)
}
// LexKindID represents an ID of a lexical kind and is unique across all modes.
type LexKindID int
const (
LexKindIDNil = LexKindID(0)
LexKindIDMin = LexKindID(1)
)
func (id LexKindID) Int() int {
return int(id)
}
// LexModeKindID represents an ID of a lexical kind and is unique within a mode.
// Use LexKindID to identify a kind across all modes uniquely.
type LexModeKindID int
const (
LexModeKindIDNil = LexModeKindID(0)
LexModeKindIDMin = LexModeKindID(1)
)
func (id LexModeKindID) Int() int {
return int(id)
}
// LexKindName represents a name of a lexical kind.
type LexKindName string
const LexKindNameNil = LexKindName("")
func (k LexKindName) String() string {
return string(k)
}
type RowDisplacementTable struct {
OriginalRowCount int `json:"original_row_count"`
OriginalColCount int `json:"original_col_count"`
EmptyValue StateID `json:"empty_value"`
Entries []StateID `json:"entries"`
Bounds []int `json:"bounds"`
RowDisplacement []int `json:"row_displacement"`
}
type UniqueEntriesTable struct {
UniqueEntries *RowDisplacementTable `json:"unique_entries,omitempty"`
UncompressedUniqueEntries []StateID `json:"uncompressed_unique_entries,omitempty"`
RowNums []int `json:"row_nums"`
OriginalRowCount int `json:"original_row_count"`
OriginalColCount int `json:"original_col_count"`
EmptyValue int `json:"empty_value"`
}
type TransitionTable struct {
InitialStateID StateID `json:"initial_state_id"`
AcceptingStates []LexModeKindID `json:"accepting_states"`
RowCount int `json:"row_count"`
ColCount int `json:"col_count"`
Transition *UniqueEntriesTable `json:"transition,omitempty"`
UncompressedTransition []StateID `json:"uncompressed_transition,omitempty"`
}
type CompiledLexModeSpec struct {
KindNames []LexKindName `json:"kind_names"`
Push []LexModeID `json:"push"`
Pop []int `json:"pop"`
DFA *TransitionTable `json:"dfa"`
}
type LexicalSpec struct {
InitialModeID LexModeID `json:"initial_mode_id"`
ModeNames []LexModeName `json:"mode_names"`
KindNames []LexKindName `json:"kind_names"`
KindIDs [][]LexKindID `json:"kind_ids"`
CompressionLevel int `json:"compression_level"`
Specs []*CompiledLexModeSpec `json:"specs"`
}
type SyntacticSpec struct {
Action []int `json:"action"`
GoTo []int `json:"goto"`
StateCount int `json:"state_count"`
InitialState int `json:"initial_state"`
StartProduction int `json:"start_production"`
LHSSymbols []int `json:"lhs_symbols"`
AlternativeSymbolCounts []int `json:"alternative_symbol_counts"`
Terminals []string `json:"terminals"`
TerminalCount int `json:"terminal_count"`
TerminalSkip []int `json:"terminal_skip"`
KindToTerminal []int `json:"kind_to_terminal"`
NonTerminals []string `json:"non_terminals"`
NonTerminalCount int `json:"non_terminal_count"`
EOFSymbol int `json:"eof_symbol"`
ErrorSymbol int `json:"error_symbol"`
ErrorTrapperStates []int `json:"error_trapper_states"`
RecoverProductions []int `json:"recover_productions"`
}
type ASTAction struct {
Entries [][]int `json:"entries"`
}
var rep = strings.NewReplacer(
`.`, `\.`,
`*`, `\*`,
`+`, `\+`,
`?`, `\?`,
`|`, `\|`,
`(`, `\(`,
`)`, `\)`,
`[`, `\[`,
`\`, `\\`,
)
// EscapePattern escapes the special characters.
// For example, EscapePattern(`+`) returns `\+`.
func EscapePattern(s string) string {
return rep.Replace(s)
}
|
