38 lines
1.1 KiB
Go
38 lines
1.1 KiB
Go
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package zcldec
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import (
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"github.com/zclconf/go-zcl/zcl"
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)
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// Variables processes the given body with the given spec and returns a
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// list of the variable traversals that would be required to decode
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// the same pairing of body and spec.
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//
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// This can be used to conditionally populate the variables in the EvalContext
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// passed to Decode, for applications where a static scope is insufficient.
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//
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// If the given body is not compliant with the given schema, diagnostics are
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// returned describing the problem, which could also serve as a pre-evaluation
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// partial validation step.
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func Variables(body zcl.Body, spec Spec) ([]zcl.Traversal, zcl.Diagnostics) {
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schema := ImpliedSchema(spec)
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content, _, diags := body.PartialContent(schema)
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var vars []zcl.Traversal
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if diags.HasErrors() {
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return vars, diags
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}
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if vs, ok := spec.(specNeedingVariables); ok {
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vars = append(vars, vs.variablesNeeded(content)...)
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}
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spec.visitSameBodyChildren(func(s Spec) {
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if vs, ok := s.(specNeedingVariables); ok {
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vars = append(vars, vs.variablesNeeded(content)...)
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}
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})
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return vars, diags
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}
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