context.go renamed as expr-context.go
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context.go
55
context.go
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// Copyright (c) 2024 Celestino Amoroso (celestino.amoroso@gmail.com).
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// All rights reserved.
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// context.go
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package expr
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// ---- Functor interface
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type Functor interface {
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Invoke(ctx ExprContext, name string, args []any) (result any, err error)
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SetFunc(info ExprFunc)
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GetFunc() ExprFunc
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GetParams() []ExprFuncParam
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GetDefinitionContext() ExprContext
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}
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// ---- Function Param Info
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type ExprFuncParam interface {
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Name() string
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Type() string
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IsDefault() bool
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IsOptional() bool
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IsRepeat() bool
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DefaultValue() any
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}
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// ---- Function Info
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type ExprFunc interface {
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Formatter
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Name() string
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MinArgs() int
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MaxArgs() int
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Functor() Functor
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Params() []ExprFuncParam
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ReturnType() string
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PrepareCall(parentCtx ExprContext, name string, varParams *[]any) (ctx ExprContext, err error)
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AllocContext(parentCtx ExprContext) (ctx ExprContext)
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}
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// ----Expression Context
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type ExprContext interface {
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Clone() ExprContext
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// Merge(ctx ExprContext)
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SetParent(ctx ExprContext)
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GetParent() (ctx ExprContext)
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GetVar(varName string) (value any, exists bool)
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GetLast() any
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SetVar(varName string, value any)
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UnsafeSetVar(varName string, value any)
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EnumVars(func(name string) (accept bool)) (varNames []string)
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EnumFuncs(func(name string) (accept bool)) (funcNames []string)
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GetFuncInfo(name string) (item ExprFunc, exists bool)
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Call(name string, args []any) (result any, err error)
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RegisterFuncInfo(info ExprFunc)
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RegisterFunc(name string, f Functor, returnType string, param []ExprFuncParam) error
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}
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