package salix import ( "errors" "go.elara.ws/salix/ast" ) var ( ErrMacroInvalidArgs = errors.New("macro expects one string argument followed by variable assignments") ErrNoSuchMacro = errors.New("no such template") ) // macroTag represents an #macro tag within a Salix template type macroTag struct{} func (mt macroTag) Run(tc *TagContext, block, args []ast.Node) error { if len(args) < 1 { return ErrMacroInvalidArgs } nameVal, err := tc.GetValue(args[0], nil) if err != nil { return err } name, ok := nameVal.(string) if !ok { return ErrMacroInvalidArgs } if len(block) == 0 { local := map[string]any{} // Use the variable assignments after the first argument // to set the local variables of the execution for _, arg := range args[1:] { if a, ok := arg.(ast.Assignment); ok { val, err := tc.GetValue(a.Value, local) if err != nil { return err } local[a.Name.Value] = val } else { // If the argument isn't an assigment, return invalid args return ErrMacroInvalidArgs } } macro, ok := tc.t.macros[name] if !ok { return ErrNoSuchMacro } return tc.Execute(macro, local) } else { tc.t.macros[name] = block } return nil }