48 lines
836 B
Go
48 lines
836 B
Go
package salix
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import (
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"errors"
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"go.elara.ws/salix/ast"
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)
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var (
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ErrMacroInvalidArgs = errors.New("macro expects one string argument")
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ErrNoSuchMacro = errors.New("no such template")
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)
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// macroTag represents an #macro tag within a Salix template
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type macroTag struct{}
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func (mt macroTag) Run(tc *TagContext, block, args []ast.Node) error {
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if len(args) != 1 {
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return ErrMacroInvalidArgs
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}
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nameVal, err := tc.GetValue(args[0], nil)
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if err != nil {
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return err
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}
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name, ok := nameVal.(string)
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if !ok {
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return ErrMacroInvalidArgs
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}
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if len(block) == 0 {
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tc.t.macroMtx.Lock()
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macro, ok := tc.t.macros[name]
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if !ok {
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return ErrNoSuchMacro
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}
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tc.t.macroMtx.Unlock()
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return tc.Execute(macro, nil)
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} else {
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tc.t.macroMtx.Lock()
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tc.t.macros[name] = block
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tc.t.macroMtx.Unlock()
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}
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return nil
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}
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