Source file src/github.com/dop251/goja/parser/scope.go

Documentation: github.com/dop251/goja/parser

     1  package parser
     2  
     3  import (
     4  	"github.com/dop251/goja/ast"
     5  	"github.com/dop251/goja/unistring"
     6  )
     7  
     8  type _scope struct {
     9  	outer           *_scope
    10  	allowIn         bool
    11  	allowLet        bool
    12  	inIteration     bool
    13  	inSwitch        bool
    14  	inFuncParams    bool
    15  	inFunction      bool
    16  	inAsync         bool
    17  	allowAwait      bool
    18  	allowYield      bool
    19  	declarationList []*ast.VariableDeclaration
    20  
    21  	labels []unistring.String
    22  }
    23  
    24  func (self *_parser) openScope() {
    25  	self.scope = &_scope{
    26  		outer:   self.scope,
    27  		allowIn: true,
    28  	}
    29  }
    30  
    31  func (self *_parser) closeScope() {
    32  	self.scope = self.scope.outer
    33  }
    34  
    35  func (self *_scope) declare(declaration *ast.VariableDeclaration) {
    36  	self.declarationList = append(self.declarationList, declaration)
    37  }
    38  
    39  func (self *_scope) hasLabel(name unistring.String) bool {
    40  	for _, label := range self.labels {
    41  		if label == name {
    42  			return true
    43  		}
    44  	}
    45  	if self.outer != nil && !self.inFunction {
    46  		// Crossing a function boundary to look for a label is verboten
    47  		return self.outer.hasLabel(name)
    48  	}
    49  	return false
    50  }
    51  

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