65 lines
1.6 KiB
Go
65 lines
1.6 KiB
Go
package builtins
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import "git.sr.ht/~cco/go-scopes/forge"
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type FE = forge.FE
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type XT = forge.XT
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type FPtr = forge.FPtr
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type builtins struct {
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Add, Body, Create, Dup, Get, Lit, Mult, Put, Reg, Var XT
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}
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func Get(f FE) *builtins {
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if v, ok := f.Voc().Lookup("builtins"); ok {
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return v.(*builtins)
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}
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b := setup(f)
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f.Voc().Register("builtins", b)
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return b
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}
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func setup(f FE) *builtins {
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voc := f.Voc()
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r := func(name string, fct forge.Callable) XT {
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return forge.Register(voc, forge.GoFunc(name, fct))
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}
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b := builtins{
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Add: r("+", func(f FE, _ XT) {
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f.Push(f.Pop().(int) + f.Pop().(int))
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}),
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Body: r("body", func(f FE, _ XT) {
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f.Push(f.Pop().(XT).Code().New().Next())
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}),
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Create: r("create", create),
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Dup: r("dup", func(f FE, _ XT) { f.Push(f.Peek(0)) }),
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Get: r("@", func(f FE, _ XT) { f.Push(f.Pop().(FPtr).Value()) }),
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Lit: r("lit", func(f FE, _ XT) { f.Push(f.Literal()) }),
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Mult: r("*", func(f FE, _ XT) {
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f.Push(f.Pop().(int) * f.Pop().(int))
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}),
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Put: r("!", func(f FE, _ XT) { f.Pop().(FPtr).Set(f.Pop()) }),
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Reg: r("reg", reg),
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Var: r("var", func(f FE, _ XT) {
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f.Push(forge.Register(voc,
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forge.FCode(f.Pop().(string), f.Code(f.NewVar()))))
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}),
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}
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return &b
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}
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func reg(f FE, _ XT) {
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f.Push(forge.Register(f.Voc(),
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forge.FCode(f.Pop().(string), f.Pop().(FPtr))))
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}
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func create(f FE, xt XT) {
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name := f.Pop().(string)
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does := forge.FCode("", f.Pop().(FPtr))
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f.Push(forge.Register(f.Voc(),
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forge.GoFunc(name, func(f FE, xt XT) {
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f.Push(forge.Register(f.Voc(),
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forge.FCode(f.Pop().(string),
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f.Code(f.NewVar(), does))))
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})))
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}
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