42 lines
910 B
Go
42 lines
910 B
Go
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// Package vm implements the execution of gg.Graphs as programs.
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package vm
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import (
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"io"
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"github.com/mediocregopher/ginger/gg"
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)
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// Value extends a gg.Value to include Operations and Tuples as a possible
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// types.
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type Value struct {
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gg.Value
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Operation
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Tuple []Value
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}
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func nameVal(n string) Value {
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var val Value
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val.Name = &n
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return val
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}
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// EvaluateSource reads and parses the io.Reader as an operation, input is used
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// as the argument to the operation, and the resultant value is returned.
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//
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// scope contains pre-defined operations and values which are available during
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// the evaluation.
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func EvaluateSource(opSrc io.Reader, input gg.Value, scope Scope) (Value, error) {
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lexer := gg.NewLexer(opSrc)
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g, err := gg.DecodeLexer(lexer)
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if err != nil {
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return Value{}, err
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}
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op := OperationFromGraph(g, scope.NewScope())
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return op.Perform(gg.ValueOut(input, gg.ZeroValue), scope)
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}
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