Celestino Amoroso
f347b15146
However, it is still allowed to store control var in a local context in special situation
42 lines
947 B
Go
42 lines
947 B
Go
// Copyright (c) 2024 Celestino Amoroso (celestino.amoroso@gmail.com).
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// All rights reserved.
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// control.go
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package expr
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// Preset control variables
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const (
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ControlPreset = "_preset"
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ControlLastResult = "last"
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ControlBoolShortcut = "_bool_shortcut"
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ControlSearchPath = "_search_path"
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ControlParentContext = "_parent_context"
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)
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// Other control variables
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const (
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control_export_all = "_export_all"
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)
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// Initial values
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const (
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init_search_path = "~/.local/lib/go-pkg/expr:/usr/local/lib/go-pkg/expr:/usr/lib/go-pkg/expr"
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)
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func initDefaultVars(ctx ExprContext) {
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if _, exists := ctx.GetVar(ControlPreset); exists {
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return
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}
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ctx.SetVar(ControlPreset, true)
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ctx.SetVar(ControlBoolShortcut, true)
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ctx.SetVar(ControlSearchPath, init_search_path)
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}
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func getControlString(ctx ExprContext, name string) (s string, exists bool) {
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var v any
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if v, exists = ctx.GetVar(name); exists {
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s, exists = v.(string)
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}
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return
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}
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