75 lines
1.2 KiB
Go
75 lines
1.2 KiB
Go
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package main
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type ExprVisitor 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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visitVariable(v *Variable) any
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visitAssignment(a *Assign) any
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}
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type Expr interface {
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expr()
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accept(v ExprVisitor) 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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type Variable struct {
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name Token
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}
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type Assign struct {
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variable Token
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value 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 (v *Variable) expr() {}
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func (a *Assign) expr() {}
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func (u *Unary) accept(v ExprVisitor) any {
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return v.visitUnary(u)
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}
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func (b *Binary) accept(v ExprVisitor) any {
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return v.visitBinary(b)
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}
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func (l *Literal) accept(v ExprVisitor) any {
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return v.visitLiteral(l)
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}
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func (g *Grouping) accept(v ExprVisitor) any {
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return v.visitGrouping(g)
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}
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func (va *Variable) accept(v ExprVisitor) any {
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return v.visitVariable(va)
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}
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func (a *Assign) accept(v ExprVisitor) any {
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return v.visitAssignment(a)
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}
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