M.V. Hutz
f3b9137d75
Closes #26 - Added -i flag to select interpreter (lambda or debruijn) - Created debruijn package with Expression interface - Variable contains index and optional label - Abstraction contains only body (no parameter) - Application structure remains similar - Implemented De Bruijn reduction without variable renaming - Shift operation handles index adjustments - Substitute replaces by index instead of name - Abstracted Engine into interface with two implementations - LambdaEngine: original named variable engine - DeBruijnEngine: new index-based engine - Added conversion functions between representations - LambdaToDeBruijn: converts named to indexed - DeBruijnToLambda: converts indexed back to named - SaccharineToDeBruijn: direct saccharine to De Bruijn - Updated main to switch engines based on -i flag - All test samples pass with both engines Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
37 lines
865 B
Go
37 lines
865 B
Go
package engine
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import (
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"git.maximhutz.com/max/lambda/internal/config"
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"git.maximhutz.com/max/lambda/pkg/emitter"
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"git.maximhutz.com/max/lambda/pkg/lambda"
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)
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// A process for reducing one λ-expression using named variables.
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type LambdaEngine struct {
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Config *config.Config
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Expression *lambda.Expression
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emitter.Emitter
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}
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// NewLambdaEngine creates a new lambda engine.
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func NewLambdaEngine(config *config.Config, expression interface{}) *LambdaEngine {
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expr := expression.(*lambda.Expression)
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return &LambdaEngine{Config: config, Expression: expr}
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}
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// Run begins the reduction process.
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func (e *LambdaEngine) Run() {
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e.Emit("start")
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lambda.ReduceAll(e.Expression, func() {
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e.Emit("step")
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})
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e.Emit("end")
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}
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// GetResult returns the stringified result.
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func (e *LambdaEngine) GetResult() string {
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return lambda.Stringify(*e.Expression)
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}
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