53 lines
798 B
Go
53 lines
798 B
Go
package main
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type Visitor interface {
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visitUnary(u *Unary) any
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visitBinary(b *Binary) any
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visitLiteral(l *Literal) any
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visitGrouping(g *Grouping) any
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}
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type Expr interface {
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expr()
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accept(v Visitor) any
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}
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type Unary struct {
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op Token
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right Expr
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}
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type Binary struct {
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left Expr
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op Token
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right Expr
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}
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type Literal struct {
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value any
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}
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type Grouping struct {
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expression Expr
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}
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func (u *Unary) expr() {}
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func (b *Binary) expr() {}
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func (l *Literal) expr() {}
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func (g *Grouping) expr() {}
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func (u *Unary) accept(v Visitor) any {
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return v.visitUnary(u)
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}
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func (b *Binary) accept(v Visitor) any {
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return v.visitBinary(b)
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}
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func (l *Literal) accept(v Visitor) any {
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return v.visitLiteral(l)
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}
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func (g *Grouping) accept(v Visitor) any {
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return v.visitGrouping(g)
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}
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