/
statements.go
277 lines (254 loc) · 7.45 KB
/
statements.go
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// Copyright 2018 Alexey Krivonogov. All rights reserved.
// Use of this source code is governed by a MIT license
// that can be found in the LICENSE file.
package compiler
import (
"github.com/gentee/gentee/core"
)
func coReturn(cmpl *compiler) error {
coExpStart(cmpl)
id := uint32(core.StackReturn)
if local := getLocalBlock(cmpl); local != nil {
id = core.StackLocret
}
cmd := core.CmdBlock{ID: id, CmdCommon: core.CmdCommon{TokenID: uint32(cmpl.pos)}}
appendCmd(cmpl, &cmd)
cmpl.owners = append(cmpl.owners, &cmd)
return nil
}
func coReturnBack(cmpl *compiler) error {
owner := cmpl.curOwner()
block := getLocalBlock(cmpl)
if block == nil {
block = &cmpl.latestFunc().Block
}
switch len(owner.Children) {
case 0:
if block.Result != nil {
return cmpl.Error(ErrMustReturn)
}
case 1:
if block.Result == nil {
return cmpl.Error(ErrReturn)
}
if !isEqualTypes(block.Result, owner.Children[0].GetResult()) {
return cmpl.Error(ErrReturnType)
}
default:
return cmpl.Error(ErrCompiler, `coReturn 1`)
}
cmpl.owners = cmpl.owners[:len(cmpl.owners)-1]
return nil
}
func coIf(cmpl *compiler) error {
coExpStart(cmpl)
cmd := core.CmdBlock{ID: core.StackIf, CmdCommon: core.CmdCommon{TokenID: uint32(cmpl.pos)}}
appendCmd(cmpl, &cmd)
cmpl.owners = append(cmpl.owners, &cmd)
return nil
}
func coIfBack(cmpl *compiler) error {
cmd := cmpl.curOwner()
if cmd.ID == core.StackIf {
if len(cmd.Children) == 1 {
if !isBoolResult(cmd.Children[0]) {
cmpl.pos = cmd.Children[0].GetToken()
return cmpl.Error(ErrBoolExp)
}
cmdIf := core.CmdBlock{ID: core.StackBlock, Parent: cmd,
CmdCommon: core.CmdCommon{TokenID: uint32(cmpl.pos)}}
cmd.Children = append(cmd.Children, &cmdIf)
cmpl.owners = append(cmpl.owners, &cmdIf)
cmpl.dynamic = &cmState{tkLCurly, cmLCurly, nil, nil, 0}
} else {
cmpl.owners = cmpl.owners[:len(cmpl.owners)-1]
}
} else {
cmpl.owners = cmpl.owners[:len(cmpl.owners)-1]
cmpl.dynamic = &cmState{tkLCurly, cmElseIf, nil, nil, 0}
}
return nil
}
func coElse(cmpl *compiler) error {
cmd := cmpl.curOwner()
if cmd.ID != core.StackIf {
cmpl.owners = cmpl.owners[:len(cmpl.owners)-1]
cmd = cmpl.curOwner()
}
cmdIf := core.CmdBlock{ID: core.StackBlock, Parent: cmd,
CmdCommon: core.CmdCommon{TokenID: uint32(cmpl.pos)}}
cmd.Children = append(cmd.Children, &cmdIf)
cmpl.owners = append(cmpl.owners, &cmdIf)
return nil
}
func coElif(cmpl *compiler) error {
coExpStart(cmpl)
return nil
}
func coElifBack(cmpl *compiler) error {
cmd := cmpl.curOwner()
if cmd.ID == core.StackIf {
if !isBoolResult(cmd.Children[len(cmd.Children)-1]) {
cmpl.pos = cmd.Children[len(cmd.Children)-1].GetToken()
return cmpl.Error(ErrBoolExp)
}
cmdIf := core.CmdBlock{ID: core.StackBlock, Parent: cmd,
CmdCommon: core.CmdCommon{TokenID: uint32(cmpl.pos)}}
cmd.Children = append(cmd.Children, &cmdIf)
cmpl.owners = append(cmpl.owners, &cmdIf)
cmpl.dynamic = &cmState{tkLCurly, cmLCurly, nil, nil, 0}
} else {
cmpl.owners = cmpl.owners[:len(cmpl.owners)-1]
}
return nil
}
func coIfEnd(cmpl *compiler) error {
if cmpl.curOwner().ID != core.StackIf {
cmpl.owners = cmpl.owners[:len(cmpl.owners)-1]
}
return nil
}
func coWhile(cmpl *compiler) error {
coExpStart(cmpl)
cmd := core.CmdBlock{ID: core.StackWhile, CmdCommon: core.CmdCommon{TokenID: uint32(cmpl.pos)}}
appendCmd(cmpl, &cmd)
cmpl.owners = append(cmpl.owners, &cmd)
return nil
}
func coWhileBack(cmpl *compiler) error {
cmd := cmpl.curOwner()
if cmd.ID == core.StackWhile {
if len(cmd.Children) == 1 {
if !isBoolResult(cmd.Children[0]) {
cmpl.pos = cmd.Children[0].GetToken()
return cmpl.Error(ErrBoolExp)
}
cmdIf := core.CmdBlock{ID: core.StackBlock, Parent: cmd,
CmdCommon: core.CmdCommon{TokenID: uint32(cmpl.pos)}}
cmd.Children = append(cmd.Children, &cmdIf)
cmpl.owners = append(cmpl.owners, &cmdIf)
cmpl.dynamic = &cmState{tkLCurly, cmLCurly, nil, nil, 0}
}
} else {
cmpl.owners = cmpl.owners[:len(cmpl.owners)-2]
}
return nil
}
func coFor(cmpl *compiler) error {
coExpStart(cmpl)
cmd := core.CmdBlock{ID: core.StackFor, CmdCommon: core.CmdCommon{TokenID: uint32(cmpl.pos)}}
appendCmd(cmpl, &cmd)
cmpl.owners = append(cmpl.owners, &cmd)
lp := cmpl.unit.Lexeme
cmpl.newPos = cmpl.pos + 1
if lp.Tokens[cmpl.newPos].Type != tkIdent {
return cmpl.ErrorPos(cmpl.newPos, ErrName)
}
cmpl.curType = nil
cmpl.pos = cmpl.newPos
if err := coVar(cmpl); err != nil {
return err
}
cmpl.newPos++
if lp.Tokens[cmpl.newPos].Type == tkComma {
cmpl.newPos++
if lp.Tokens[cmpl.newPos].Type != tkIdent {
return cmpl.ErrorPos(cmpl.newPos, ErrName)
}
cmpl.pos = cmpl.newPos
if err := coVar(cmpl); err != nil {
return err
}
cmpl.newPos++
} else {
if err := coVarToken(cmpl, core.RandName()); err != nil {
return err
}
}
if lp.Tokens[cmpl.newPos].Type != tkIn {
return cmpl.ErrorPos(cmpl.newPos, ErrForIn)
}
return nil
}
func coForBack(cmpl *compiler) error {
cmd := cmpl.curOwner()
if cmd.ID == core.StackFor {
if len(cmd.Children) == 1 {
if !isIndexResult(cmd.Children[0]) {
return cmpl.ErrorPos(cmd.Children[0].GetToken(), ErrSupportIndex,
cmd.Children[0].GetResult().GetName())
}
cmd.Vars[0] = cmd.Children[0].GetResult().IndexOf
cmd.Vars[1] = cmpl.getIntType()
cmdFor := core.CmdBlock{ID: core.StackBlock, Parent: cmd,
CmdCommon: core.CmdCommon{TokenID: uint32(cmpl.pos)}}
cmd.Children = append(cmd.Children, &cmdFor)
cmpl.owners = append(cmpl.owners, &cmdFor)
cmpl.dynamic = &cmState{tkLCurly, cmLCurly, nil, nil, 0}
}
} else {
cmpl.owners = cmpl.owners[:len(cmpl.owners)-2]
}
return nil
}
func coSwitch(cmpl *compiler) error {
coExpStart(cmpl)
cmd := core.CmdBlock{ID: core.StackSwitch, CmdCommon: core.CmdCommon{TokenID: uint32(cmpl.pos)}}
appendCmd(cmpl, &cmd)
cmpl.owners = append(cmpl.owners, &cmd)
return nil
}
func coSwitchBack(cmpl *compiler) error {
cmd := cmpl.curOwner()
if cmd.ID == core.StackSwitch {
if len(cmd.Children) == 1 {
if !isBaseResult(cmd.Children[0]) {
return cmpl.ErrorPos(cmd.Children[0].GetToken(), ErrSwitchType,
cmd.Children[0].GetResult().GetName())
}
cmpl.dynamic = &cmState{tkCase, cmCaseMust, nil, nil, 0}
} else {
cmpl.owners = cmpl.owners[:len(cmpl.owners)-1]
}
}
return nil
}
func coCase(cmpl *compiler) error {
coExpStart(cmpl)
cmd := core.CmdBlock{ID: core.StackCase, CmdCommon: core.CmdCommon{TokenID: uint32(cmpl.pos)}}
appendCmd(cmpl, &cmd)
cmpl.owners = append(cmpl.owners, &cmd)
return nil
}
func coCaseBack(cmpl *compiler) error {
cmd := cmpl.curOwner()
if cmd.ID == core.StackCase {
if len(cmd.Children) >= 1 {
switchType := cmd.Parent.Children[0].GetResult()
for _, cmdExp := range cmd.Children {
if switchType != cmdExp.GetResult() {
return cmpl.ErrorPos(cmdExp.GetToken(), ErrWrongType,
switchType.GetName())
}
}
cmdIf := core.CmdBlock{ID: core.StackBlock, Parent: cmd,
CmdCommon: core.CmdCommon{TokenID: uint32(cmpl.pos)}}
cmd.Children = append(cmd.Children, &cmdIf)
cmpl.owners = append(cmpl.owners, &cmdIf)
cmpl.dynamic = &cmState{tkLCurly, cmLCurly, nil, nil, 0}
}
} else {
cmpl.owners = cmpl.owners[:len(cmpl.owners)-2]
}
return nil
}
func coDefault(cmpl *compiler) error {
cmd := core.CmdBlock{ID: core.StackDefault, CmdCommon: core.CmdCommon{TokenID: uint32(cmpl.pos)}}
appendCmd(cmpl, &cmd)
cmpl.owners = append(cmpl.owners, &cmd)
return nil
}
func coDefaultBack(cmpl *compiler) error {
cmpl.owners = cmpl.owners[:len(cmpl.owners)-1]
return nil
}