php-parser/php7/parser.go

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package php7
import (
"io"
"github.com/z7zmey/php-parser/meta"
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"github.com/z7zmey/php-parser/errors"
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"github.com/z7zmey/php-parser/node"
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"github.com/z7zmey/php-parser/parser"
"github.com/z7zmey/php-parser/scanner"
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)
func (lval *yySymType) Token(t *scanner.Token) {
lval.token = t
}
// Parser structure
type Parser struct {
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*scanner.Lexer
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path string
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currentToken *scanner.Token
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positionBuilder *parser.PositionBuilder
errors []*errors.Error
rootNode node.Node
}
// NewParser creates and returns new Parser
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func NewParser(src io.Reader, path string) *Parser {
lexer := scanner.NewLexer(src, path)
return &Parser{
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lexer,
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path,
nil,
nil,
nil,
nil,
}
}
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// Lex proxy to lexer Lex
func (l *Parser) Lex(lval *yySymType) int {
t := l.Lexer.Lex(lval)
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l.currentToken = lval.token
return t
}
func (l *Parser) Error(msg string) {
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l.errors = append(l.errors, errors.NewError(msg, l.currentToken))
}
func (l *Parser) WithMeta() {
l.Lexer.WithMeta = true
}
// Parse the php7 Parser entrypoint
func (l *Parser) Parse() int {
// init
l.errors = nil
l.rootNode = nil
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l.positionBuilder = &parser.PositionBuilder{}
// parse
return yyParse(l)
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}
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// GetPath return path to file
func (l *Parser) GetPath() string {
return l.path
}
// GetRootNode returns root node
func (l *Parser) GetRootNode() node.Node {
return l.rootNode
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}
// GetErrors returns errors list
func (l *Parser) GetErrors() []*errors.Error {
return l.errors
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}
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// helpers
func lastNode(nn []node.Node) node.Node {
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if len(nn) == 0 {
return nil
}
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return nn[len(nn)-1]
}
func firstNode(nn []node.Node) node.Node {
return nn[0]
}
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func isDollar(r rune) bool {
return r == '$'
}
func addMeta(n node.Node, mm []meta.Meta, tn meta.TokenName) {
for _, m := range mm {
m.SetTokenName(tn)
}
n.AddMeta(mm)
}
func (p *Parser) returnTokenToPool(yyDollar []yySymType, yyVAL *yySymType) {
for i := 1; i < len(yyDollar); i++ {
if yyDollar[i].token != nil {
p.TokenPool.Put(yyDollar[i].token)
}
yyDollar[i].token = nil
}
yyVAL.token = nil
}