/
render_forstmt.go
77 lines (66 loc) · 1.71 KB
/
render_forstmt.go
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package goast
import (
"bytes"
"errors"
"fmt"
"go/ast"
"go/token"
)
// RenderForStmt 渲染forstmt,在plantuml中显示
func RenderForStmt(fset *token.FileSet, stmt *ast.ForStmt, buf *bytes.Buffer) error {
if stmt == nil {
return errors.New("nil *ast.ForStmt")
}
participant, err := FunctionNameContainsStmt(fset, stmt)
if err != nil {
return err
}
if _, ok := renderedParticipants[participant]; !ok {
fmt.Fprintf(buf, "participant \"%s\"\n", participant)
renderedParticipants[participant] = true
}
fmt.Fprintf(buf, "group ForStmt\n")
defer fmt.Fprintf(buf, "end\n")
// cond init
fmt.Fprintf(buf, "\t\"%s\"->\"%s\"\n", participant, participant)
if stmt.Init != nil {
s, err := PosToString(fset, stmt.Init.Pos(), stmt.Init.End())
if err != nil {
return err
}
fmt.Fprintf(buf, "\tnote right: init %s\n", joinNewLine(s))
}
// cond determination
if stmt.Cond != nil {
s, err := PosToString(fset, stmt.Cond.Pos(), stmt.Cond.End())
if err != nil {
return err
}
fmt.Fprintf(buf, "\tloop %s\n", s)
}
// body statements
for _, s := range stmt.Body.List {
//fmt.Fprintf(buf, "\t\t\"%s\"->\"%s\"\n", participant, participant)
//s, err := PosToString(fset, s.Pos(), s.End())
//if err != nil {
// return err
//}
//fmt.Fprintf(buf, "\t\tnote right: body stmt: %s\n", joinNewLine(s))
dat, err := RenderStmt(fset, s)
if err != nil {
return err
}
buf.Write(dat)
}
// cond post
if stmt.Post != nil {
fmt.Fprintf(buf, "\t\t\"%s\"->\"%s\"\n", participant, participant)
s, err := PosToString(fset, stmt.Post.Pos(), stmt.Post.End())
if err != nil {
return err
}
fmt.Fprintf(buf, "\t\tnote right: post %s\n", joinNewLine(s))
}
fmt.Fprintf(buf, "\tend\n")
return nil
}