91 lines
1.4 KiB
Go
91 lines
1.4 KiB
Go
package main
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type StmtVisitor interface {
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visitIfStmt(i *IfStmt)
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visitVarStmt(v *VarStmt)
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visitExprStmt(es *ExprStmt)
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visitPrintStmt(p *PrintStmt)
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visitBlockStmt(b *BlockStmt)
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visitEnvStmt(e *EnvStmt)
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visitWhileStmt(w *WhileStmt)
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visitBreakStmt(b *BreakStmt)
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}
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type Stmt interface {
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stmt()
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accept(v StmtVisitor)
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}
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type PrintStmt struct {
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val Expr
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}
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type ExprStmt struct {
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expr Expr
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}
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type VarStmt struct {
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name Token
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initializer Expr
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}
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type BlockStmt struct {
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stmts []Stmt
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}
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type EnvStmt struct{}
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type IfStmt struct {
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name Token
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expr Expr
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then Stmt
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or Stmt
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}
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type WhileStmt struct {
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cond Expr
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body Stmt
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}
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type BreakStmt struct{}
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func (i *IfStmt) stmt() {}
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func (e *EnvStmt) stmt() {}
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func (vs *VarStmt) stmt() {}
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func (es *ExprStmt) stmt() {}
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func (p *PrintStmt) stmt() {}
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func (b *BlockStmt) stmt() {}
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func (w *WhileStmt) stmt() {}
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func (b *BreakStmt) stmt() {}
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func (p *PrintStmt) accept(v StmtVisitor) {
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v.visitPrintStmt(p)
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}
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func (se *ExprStmt) accept(v StmtVisitor) {
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v.visitExprStmt(se)
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}
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func (vs *VarStmt) accept(v StmtVisitor) {
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v.visitVarStmt(vs)
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}
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func (b *BlockStmt) accept(v StmtVisitor) {
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v.visitBlockStmt(b)
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}
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func (i *IfStmt) accept(v StmtVisitor) {
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v.visitIfStmt(i)
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}
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func (e *EnvStmt) accept(v StmtVisitor) {
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v.visitEnvStmt(e)
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}
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func (w *WhileStmt) accept(v StmtVisitor) {
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v.visitWhileStmt(w)
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}
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func (b *BreakStmt) accept(v StmtVisitor) {
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v.visitBreakStmt(b)
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}
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