66 lines
1.2 KiB
Go
66 lines
1.2 KiB
Go
package gen
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import (
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"bytes"
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"fmt"
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"go/format"
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"strings"
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"github.com/mmcloughlin/avo/internal/inst"
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)
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type Interface interface {
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Generate([]inst.Instruction) ([]byte, error)
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}
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type Func func([]inst.Instruction) ([]byte, error)
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func (f Func) Generate(is []inst.Instruction) ([]byte, error) {
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return f(is)
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}
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type Config struct {
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Name string
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Argv []string
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}
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func (c Config) GeneratedBy() string {
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if c.Argv == nil {
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return c.Name
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}
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return fmt.Sprintf("command: %s", strings.Join(c.Argv, " "))
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}
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func (c Config) GeneratedWarning() string {
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return fmt.Sprintf("Code generated by %s. DO NOT EDIT.", c.GeneratedBy())
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}
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type Builder func(Config) Interface
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// GoFmt formats Go code produced from the given generator.
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func GoFmt(i Interface) Interface {
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return Func(func(is []inst.Instruction) ([]byte, error) {
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b, err := i.Generate(is)
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if err != nil {
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return nil, err
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}
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return format.Source(b)
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})
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}
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type printer struct {
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buf bytes.Buffer
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err error
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}
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func (p *printer) Printf(format string, args ...interface{}) {
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if p.err != nil {
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return
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}
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_, p.err = fmt.Fprintf(&p.buf, format, args...)
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}
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func (p *printer) Result() ([]byte, error) {
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return p.buf.Bytes(), p.err
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}
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