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