forked from robertkrimen/otto
/
evaluate.go
152 lines (112 loc) · 3.16 KB
/
evaluate.go
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package otto
import (
"fmt"
)
func (self *_runtime) evaluateBody(body []_node) Value {
bodyValue := Value{}
for _, node := range body {
value := self.evaluate(node)
if value.isResult() {
return value
}
if !value.isEmpty() {
// We have GetValue here to (for example) trigger a
// ReferenceError (of the not defined variety)
// Not sure if this is the best way to error out early
// for such errors or if there is a better way
bodyValue = self.GetValue(value)
}
}
return bodyValue
}
func (self *_runtime) evaluate(node _node) Value {
defer func() {
// This defer is lame (unecessary overhead)
// It would be better to mark the errors at the source
if caught := recover(); caught != nil {
switch caught := caught.(type) {
case _error:
if caught.Line == -1 {
caught.Line = node.position()
}
panic(caught) // Panic the modified _error
}
panic(caught)
}
}()
switch node := node.(type) {
case *_variableDeclarationListNode:
return self.evaluateVariableDeclarationList(node)
case *_variableDeclarationNode:
return self.evaluateVariableDeclaration(node)
case *_programNode:
self.declare("function", node.FunctionList)
self.declare("variable", node.VariableList)
return self.evaluateBody(node.Body)
case *_blockNode:
return self.evaluateBlock(node)
case *_valueNode:
return self.evaluateValue(node)
case *_identifierNode:
return self.evaluateIdentifier(node)
case *_functionNode:
return self.evaluateFunction(node)
case *_binaryOperationNode:
return self.evaluateBinaryOperation(node)
case *_assignmentNode:
return self.evaluateAssignment(node)
case *_unaryOperationNode:
return self.evaluateUnaryOperation(node)
case *_comparisonNode:
return self.evaluateComparison(node)
case *_returnNode:
value := self.evaluateReturn(node)
return value
return self.evaluateReturn(node)
case *_ifNode:
return self.evaluateIf(node)
case *_doWhileNode:
return self.evaluateDoWhile(node)
case *_whileNode:
return self.evaluateWhile(node)
case *_callNode:
return self.evaluateCall(node, nil)
case *_continueNode:
return toValue(newContinueResult(node.Target))
case *_switchNode:
return self.evaluateSwitch(node)
case *_forNode:
return self.evaluateFor(node)
case *_forInNode:
return self.evaluateForIn(node)
case *_breakNode:
return toValue(newBreakResult(node.Target))
case *_throwNode:
return self.evaluateThrow(node)
case *_emptyNode:
return emptyValue()
case *_tryCatchNode:
return self.evaluateTryCatch(node)
case *_dotMemberNode:
return self.evaluateDotMember(node)
case *_bracketMemberNode:
return self.evaluateBracketMember(node)
case *_objectNode:
return self.evaluateObject(node)
case *_regExpNode:
return self.evaluateRegExp(node)
case *_arrayNode:
return self.evaluateArray(node)
case *_newNode:
return self.evaluateNew(node)
case *_conditionalNode:
return self.evaluateConditional(node)
case *_thisNode:
return toValue_object(self._executionContext(0).this)
case *_commaNode:
return self.evaluateComma(node)
case *_withNode:
return self.evaluateWith(node)
}
panic(fmt.Sprintf("evaluate: Here be dragons: %T %v", node, node))
}