M.V. Hutz
d715d38e9e
- Rename pkg/interpreter to pkg/runtime - Move ReduceOnce to new pkg/normalorder package - Convert standalone functions (Substitute, Rename, GetFree, IsFree) to receiver methods on concrete expression types - Change Set from pointer receivers to value receivers - Update all references from interpreter to runtime terminology Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
32 lines
753 B
Go
32 lines
753 B
Go
// Package "explanation" provides an observer to gather the reasoning during the
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// reduction, and present a thorough explanation to the user for each step.
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package plugins
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import (
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"fmt"
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"git.maximhutz.com/max/lambda/pkg/runtime"
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)
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// Track the reductions made by a reduction process.
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type Explanation struct {
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reducer runtime.Runtime
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}
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// Attaches a new explanation tracker to a reducer.
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func NewExplanation(r runtime.Runtime) *Explanation {
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plugin := &Explanation{reducer: r}
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r.On(runtime.StartEvent, plugin.Start)
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r.On(runtime.StepEvent, plugin.Step)
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return plugin
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}
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func (t *Explanation) Start() {
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fmt.Println(t.reducer.Expression().String())
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}
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func (t *Explanation) Step() {
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fmt.Println(" =", t.reducer.Expression().String())
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}
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