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package pongo2
type tagSetNode struct {
name string
expression IEvaluator
}
func (node *tagSetNode) Execute(ctx *ExecutionContext, writer TemplateWriter) *Error {
// Evaluate expression
value, err := node.expression.Evaluate(ctx)
if err != nil {
return err
}
ctx.Private[node.name] = value
return nil
}
func tagSetParser(doc *Parser, start *Token, arguments *Parser) (INodeTag, *Error) {
node := &tagSetNode{}
// Parse variable name
typeToken := arguments.MatchType(TokenIdentifier)
if typeToken == nil {
return nil, arguments.Error("Expected an identifier.", nil)
}
node.name = typeToken.Val
if arguments.Match(TokenSymbol, "=") == nil {
return nil, arguments.Error("Expected '='.", nil)
}
// Variable expression
keyExpression, err := arguments.ParseExpression()
if err != nil {
return nil, err
}
node.expression = keyExpression
// Remaining arguments
if arguments.Remaining() > 0 {
return nil, arguments.Error("Malformed 'set'-tag arguments.", nil)
}
return node, nil
}
func init() {
RegisterTag("set", tagSetParser)
}
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