php-parser/internal/php5/parser.go
2020-12-08 02:08:59 +02:00

66 lines
1.3 KiB
Go

package php5
import (
builder "github.com/z7zmey/php-parser/internal/position"
"github.com/z7zmey/php-parser/internal/scanner"
"github.com/z7zmey/php-parser/pkg/ast"
"github.com/z7zmey/php-parser/pkg/errors"
"github.com/z7zmey/php-parser/pkg/token"
)
// Parser structure
type Parser struct {
Lexer *scanner.Lexer
currentToken *token.Token
rootNode ast.Vertex
errHandlerFunc func(*errors.Error)
builder *builder.Builder
}
// NewParser creates and returns new Parser
func NewParser(lexer *scanner.Lexer, errHandlerFunc func(*errors.Error)) *Parser {
return &Parser{
Lexer: lexer,
errHandlerFunc: errHandlerFunc,
builder: builder.NewBuilder(),
}
}
// Lex proxy to scanner Lex
func (p *Parser) Lex(lval *yySymType) int {
t := p.Lexer.Lex()
p.currentToken = t
lval.token = t
return int(t.ID)
}
func (p *Parser) Error(msg string) {
if p.errHandlerFunc == nil {
return
}
p.errHandlerFunc(errors.NewError(msg, p.currentToken.Position))
}
// Parse the php7 Parser entrypoint
func (p *Parser) Parse() int {
p.rootNode = nil
return yyParse(p)
}
// GetRootNode returns root node
func (p *Parser) GetRootNode() ast.Vertex {
return p.rootNode
}
// helpers
func lastNode(nn []ast.Vertex) ast.Vertex {
if len(nn) == 0 {
return nil
}
return nn[len(nn)-1]
}