ast

package
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 Go to latest Published: Sep 12, 2019 License: Apache-2.0 Imports: 10 Imported by: 0

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Index

Constants

This section is empty.

Variables

This section is empty.

Functions

func CompileExp 

func CompileExp(c *ir.Compiler, e ExpNode) ir.Register

CompileExp compiles the given expression into a register and returns it.

func CompileExpInto 

func CompileExpInto(c *ir.Compiler, e ExpNode, dst ir.Register)

CompileExpInto compiles the given expression into the given register

func CompileExpList 

func CompileExpList(c *ir.Compiler, exps []ExpNode, dstRegs []ir.Register)

CompileExpList compiles the given expressions into free registers, which are recorded into dstRegs (hence exps and dstRegs must have the same length). Those registers are taken so need to be released by the caller when no longer needed.

func EmitInstr 

func EmitInstr(c *ir.Compiler, l Locator, instr ir.Instruction)

func EmitJump 

func EmitJump(c *ir.Compiler, l Locator, lbl ir.Name)

func EmitLoadConst 

func EmitLoadConst(c *ir.Compiler, l Locator, k ir.Constant, reg ir.Register)

func EmitMove 

func EmitMove(c *ir.Compiler, l Locator, dst, src ir.Register)

func IsNumber 

func IsNumber(e ExpNode) bool

Types

type Assign 

type Assign func(ir.Register)

type AssignStat 

type AssignStat struct {
	Location
	Dest []Var
	Src  []ExpNode
}

func NewAssignStat 

func NewAssignStat(dst []Var, src []ExpNode) AssignStat

func NewFunctionStat 

func NewFunctionStat(fName Var, method Name, fx Function) AssignStat

func (AssignStat) CompileStat 

func (s AssignStat) CompileStat(c *ir.Compiler)

func (AssignStat) HWrite 

func (s AssignStat) HWrite(w HWriter)

type BFunctionCall 

type BFunctionCall struct {
	Location
	// contains filtered or unexported fields
}

func (BFunctionCall) CompileCall 

func (f BFunctionCall) CompileCall(c *ir.Compiler, tail bool)

func (BFunctionCall) CompileExp 

func (f BFunctionCall) CompileExp(c *ir.Compiler, dst ir.Register) ir.Register

func (BFunctionCall) HWrite 

func (f BFunctionCall) HWrite(w HWriter)

type BinOp 

type BinOp struct {
	Location
	// contains filtered or unexported fields
}

func NewBinOp 

func NewBinOp(left ExpNode, op ops.Op, right ExpNode) *BinOp

func (*BinOp) CompileExp 

func (b *BinOp) CompileExp(c *ir.Compiler, dst ir.Register) ir.Register

func (*BinOp) HWrite 

func (b *BinOp) HWrite(w HWriter)

type BlockStat 

type BlockStat struct {
	Location
	Stats  []Stat
	Return []ExpNode
}

func NewBlockStat 

func NewBlockStat(stats []Stat, rtn []ExpNode) BlockStat

func (BlockStat) CompileBlock 

func (s BlockStat) CompileBlock(c *ir.Compiler)

func (BlockStat) CompileBlockNoPop 

func (s BlockStat) CompileBlockNoPop(c *ir.Compiler) func()

func (BlockStat) CompileChunk 

func (s BlockStat) CompileChunk(source string) *ir.Compiler

func (BlockStat) CompileStat 

func (s BlockStat) CompileStat(c *ir.Compiler)

func (BlockStat) HWrite 

func (s BlockStat) HWrite(w HWriter)

type Bool 

type Bool struct {
	Location
	Val bool
}

func False 

func False(tok *token.Token) Bool

func True 

func True(tok *token.Token) Bool

func (Bool) CompileExp 

func (b Bool) CompileExp(c *ir.Compiler, dst ir.Register) ir.Register

func (Bool) HWrite 

func (b Bool) HWrite(w HWriter)

type BreakStat 

type BreakStat struct {
	Location
}

func NewBreakStat 

func NewBreakStat(tok *token.Token) BreakStat

func (BreakStat) CompileStat 

func (s BreakStat) CompileStat(c *ir.Compiler)

func (BreakStat) HWrite 

func (s BreakStat) HWrite(w HWriter)

type CondStat 

type CondStat struct {
	Cond ExpNode
	Body BlockStat
}

CondStat is a conditional statement, used in e.g. if statements and while / repeat until loops.

func (CondStat) CompileCond 

func (s CondStat) CompileCond(c *ir.Compiler, lbl ir.Label)

CompileCond compiles a conditional statement.

func (CondStat) HWrite 

func (s CondStat) HWrite(w HWriter)

type EmptyStat 

type EmptyStat struct {
	Location
}

func NewEmptyStat 

func NewEmptyStat(tok *token.Token) EmptyStat

func (EmptyStat) CompileStat 

func (s EmptyStat) CompileStat(c *ir.Compiler)

func (EmptyStat) HWrite 

func (s EmptyStat) HWrite(w HWriter)

type EtcType 

type EtcType struct {
	Location
}

func Etc 

func Etc(tok *token.Token) EtcType

func (EtcType) CompileEtcExp 

func (e EtcType) CompileEtcExp(c *ir.Compiler, dst ir.Register) ir.Register

func (EtcType) CompileExp 

func (e EtcType) CompileExp(c *ir.Compiler, dst ir.Register) ir.Register

func (EtcType) CompileTailExp 

func (e EtcType) CompileTailExp(c *ir.Compiler, dstRegs []ir.Register)

func (EtcType) HWrite 

func (e EtcType) HWrite(w HWriter)

type ExpNode 

type ExpNode interface {
	Node
	CompileExp(*ir.Compiler, ir.Register) ir.Register
}

ExpNode is an expression

func NewNumber 

func NewNumber(id *token.Token) (ExpNode, error)

func NewStringArgs 

func NewStringArgs(id *token.Token) ([]ExpNode, error)

type Float 

type Float struct {
	Location
	// contains filtered or unexported fields
}

func NewFloat 

func NewFloat(x float64) Float

func (Float) CompileExp 

func (f Float) CompileExp(c *ir.Compiler, dst ir.Register) ir.Register

func (Float) HWrite 

func (f Float) HWrite(w HWriter)

func (Float) Val 

func (f Float) Val() float64

type ForInStat 

type ForInStat struct {
	Location
	Vars   []Name
	Params []ExpNode
	Body   BlockStat
}

func NewForInStat 

func NewForInStat(startTok, endTok *token.Token, itervars []Name, params []ExpNode, body BlockStat) *ForInStat

func (ForInStat) CompileStat 

func (s ForInStat) CompileStat(c *ir.Compiler)

func (*ForInStat) HWrite 

func (s *ForInStat) HWrite(w HWriter)

type ForStat 

type ForStat struct {
	Location
	Var   Name
	Start ExpNode
	Stop  ExpNode
	Step  ExpNode
	Body  BlockStat
}

func NewForStat 

func NewForStat(startTok, endTok *token.Token, itervar Name, params []ExpNode, body BlockStat) *ForStat

func (ForStat) CompileStat 

func (s ForStat) CompileStat(c *ir.Compiler)

func (*ForStat) HWrite 

func (s *ForStat) HWrite(w HWriter)

type Function 

type Function struct {
	Location
	ParList
	Body BlockStat
	Name string
}

func NewFunction 

func NewFunction(startTok, endTok *token.Token, parList ParList, body BlockStat) Function

func (Function) CompileBody 

func (f Function) CompileBody(c *ir.Compiler)

func (Function) CompileExp 

func (f Function) CompileExp(c *ir.Compiler, dst ir.Register) ir.Register

func (Function) HWrite 

func (f Function) HWrite(w HWriter)

type FunctionCall 

type FunctionCall struct {
	*BFunctionCall
}

func NewFunctionCall 

func NewFunctionCall(target ExpNode, method Name, args []ExpNode) FunctionCall

func (FunctionCall) CompileEtcExp 

func (f FunctionCall) CompileEtcExp(c *ir.Compiler, dst ir.Register) ir.Register

func (FunctionCall) CompileStat 

func (f FunctionCall) CompileStat(c *ir.Compiler)

func (FunctionCall) CompileTailExp 

func (f FunctionCall) CompileTailExp(c *ir.Compiler, dstRegs []ir.Register)

func (FunctionCall) InBrackets 

func (f FunctionCall) InBrackets() *BFunctionCall

type GotoStat 

type GotoStat struct {
	Location
	Label Name
}

func NewGotoStat 

func NewGotoStat(gotoTok *token.Token, lbl Name) GotoStat

func (GotoStat) CompileStat 

func (s GotoStat) CompileStat(c *ir.Compiler)

func (GotoStat) HWrite 

func (s GotoStat) HWrite(w HWriter)

type HWriter 

type HWriter interface {
	Writef(string, ...interface{})
	Indent()
	Dedent()
	Next()
}

HWriter is an interface for printing nodes

type IfStat 

type IfStat struct {
	Location
	If      CondStat
	ElseIfs []CondStat
	Else    *BlockStat
}

func NewIfStat 

func NewIfStat(endTok *token.Token) IfStat

func (IfStat) AddElse 

func (s IfStat) AddElse(endTok *token.Token, body BlockStat) IfStat

func (IfStat) AddElseIf 

func (s IfStat) AddElseIf(cond ExpNode, body BlockStat) IfStat

func (IfStat) AddIf 

func (s IfStat) AddIf(ifTok *token.Token, cond ExpNode, body BlockStat) IfStat

func (IfStat) CompileStat 

func (s IfStat) CompileStat(c *ir.Compiler)

func (IfStat) HWrite 

func (s IfStat) HWrite(w HWriter)

type IndentWriter 

type IndentWriter struct {
	// contains filtered or unexported fields
}

func NewIndentWriter 

func NewIndentWriter(w io.Writer) *IndentWriter

func (*IndentWriter) Dedent 

func (w *IndentWriter) Dedent()

func (*IndentWriter) Indent 

func (w *IndentWriter) Indent()

func (*IndentWriter) Next 

func (w *IndentWriter) Next()

func (*IndentWriter) Writef 

func (w *IndentWriter) Writef(f string, args ...interface{})

type IndexExp 

type IndexExp struct {
	Location
	Coll ExpNode
	Idx  ExpNode
}

func NewIndexExp 

func NewIndexExp(coll ExpNode, idx ExpNode) IndexExp

func (IndexExp) CompileAssign 

func (e IndexExp) CompileAssign(c *ir.Compiler) Assign

func (IndexExp) CompileExp 

func (e IndexExp) CompileExp(c *ir.Compiler, dst ir.Register) ir.Register

func (IndexExp) FunctionName 

func (e IndexExp) FunctionName() string

func (IndexExp) HWrite 

func (e IndexExp) HWrite(w HWriter)

type Int 

type Int struct {
	Location
	// contains filtered or unexported fields
}

func NewInt 

func NewInt(val uint64) Int

func (Int) CompileExp 

func (n Int) CompileExp(c *ir.Compiler, dst ir.Register) ir.Register

func (Int) HWrite 

func (n Int) HWrite(w HWriter)

func (Int) Val 

func (n Int) Val() uint64

type LabelStat 

type LabelStat struct {
	Location
	Name
}

func NewLabelStat 

func NewLabelStat(label Name) LabelStat

func (LabelStat) CompileStat 

func (s LabelStat) CompileStat(c *ir.Compiler)

func (LabelStat) HWrite 

func (s LabelStat) HWrite(w HWriter)

type LocalFunctionStat 

type LocalFunctionStat struct {
	Location
	Function
	Name Name
}

func NewLocalFunctionStat 

func NewLocalFunctionStat(name Name, fx Function) LocalFunctionStat

func (LocalFunctionStat) CompileStat 

func (s LocalFunctionStat) CompileStat(c *ir.Compiler)

func (LocalFunctionStat) HWrite 

func (s LocalFunctionStat) HWrite(w HWriter)

type LocalStat 

type LocalStat struct {
	Location
	Names  []Name
	Values []ExpNode
}

func NewLocalStat 

func NewLocalStat(names []Name, values []ExpNode) LocalStat

func (LocalStat) CompileStat 

func (s LocalStat) CompileStat(c *ir.Compiler)

func (LocalStat) HWrite 

func (s LocalStat) HWrite(w HWriter)

type Location 

type Location struct {
	// contains filtered or unexported fields
}

func LocFromToken 

func LocFromToken(tok *token.Token) Location

func LocFromTokens 

func LocFromTokens(t1, t2 *token.Token) Location

func MergeLocations 

func MergeLocations(l1, l2 Locator) Location

func (Location) EndPos 

func (l Location) EndPos() *token.Pos

func (Location) Locate 

func (l Location) Locate() Location

func (Location) StartPos 

func (l Location) StartPos() *token.Pos

type Locator 

type Locator interface {
	Locate() Location
}

type Name 

type Name struct {
	Location
	Val string
}

func NewName 

func NewName(id *token.Token) Name

func (Name) AstString 

func (n Name) AstString() String

func (Name) CompileAssign 

func (n Name) CompileAssign(c *ir.Compiler) Assign

func (Name) CompileExp 

func (n Name) CompileExp(c *ir.Compiler, dst ir.Register) ir.Register

func (Name) FunctionName 

func (n Name) FunctionName() string

func (Name) HWrite 

func (n Name) HWrite(w HWriter)

type NilType 

type NilType struct {
	Location
}

func Nil 

func Nil(tok *token.Token) NilType

func (NilType) CompileExp 

func (n NilType) CompileExp(c *ir.Compiler, dst ir.Register) ir.Register

func (NilType) HWrite 

func (n NilType) HWrite(w HWriter)

type NoTableKey 

type NoTableKey struct {
	Location
}

func (NoTableKey) CompileExp 

func (k NoTableKey) CompileExp(c *ir.Compiler, dst ir.Register) ir.Register

func (NoTableKey) HWrite 

func (k NoTableKey) HWrite(w HWriter)

type Node 

type Node interface {
	Locator
	HWrite(w HWriter)
}

Node is a node in the AST

type NumberOracle 

type NumberOracle interface {
	IsNumber() bool
}

type ParList 

type ParList struct {
	Params  []Name
	HasDots bool
}

func NewParList 

func NewParList(params []Name, hasDots bool) ParList

type RepeatStat 

type RepeatStat struct {
	Location
	CondStat
}

RepeatStat represents a repeat / until statement.

func NewRepeatStat 

func NewRepeatStat(repTok *token.Token, body BlockStat, cond ExpNode) RepeatStat

func (RepeatStat) CompileStat 

func (s RepeatStat) CompileStat(c *ir.Compiler)

CompileStat implements Stat.CompileStat.

func (RepeatStat) HWrite 

func (s RepeatStat) HWrite(w HWriter)

type Stat 

type Stat interface {
	Node
	CompileStat(c *ir.Compiler)
}

Stat is a statement

type String 

type String struct {
	Location
	Val []byte
}

String is a string literal.

func NewLongString 

func NewLongString(id *token.Token) String

func NewString 

func NewString(id *token.Token) (ss String, err error)

NewString returns a String from a string token, or an error if it couln't.

func (String) CompileExp 

func (s String) CompileExp(c *ir.Compiler, dst ir.Register) ir.Register

func (String) HWrite 

func (s String) HWrite(w HWriter)

type TableConstructor 

type TableConstructor struct {
	Location
	Fields []TableField
}

func NewTableConstructor 

func NewTableConstructor(opTok, clTok *token.Token, fields []TableField) TableConstructor

func (TableConstructor) CompileExp 

func (t TableConstructor) CompileExp(c *ir.Compiler, dst ir.Register) ir.Register

func (TableConstructor) HWrite 

func (c TableConstructor) HWrite(w HWriter)

type TableField 

type TableField struct {
	Location
	Key   ExpNode
	Value ExpNode
}

func NewTableField 

func NewTableField(key ExpNode, value ExpNode) TableField

type TailExpNode 

type TailExpNode interface {
	Node
	CompileTailExp(*ir.Compiler, []ir.Register)
	CompileEtcExp(*ir.Compiler, ir.Register) ir.Register
}

TailExpNode is an expression which can be the tail of an exp list

type UnOp 

type UnOp struct {
	Location
	Op      ops.Op
	Operand ExpNode
}

func NewUnOp 

func NewUnOp(opTok *token.Token, op ops.Op, exp ExpNode) *UnOp

func (*UnOp) CompileExp 

func (u *UnOp) CompileExp(c *ir.Compiler, dst ir.Register) ir.Register

func (*UnOp) HWrite 

func (u *UnOp) HWrite(w HWriter)

type Var 

type Var interface {
	ExpNode
	CompileAssign(*ir.Compiler) Assign
	FunctionName() string
}

Var is an l-value

type WhileStat 

type WhileStat struct {
	Location
	CondStat
}

WhileStat represents a while / end statement

func NewWhileStat 

func NewWhileStat(whileTok, endTok *token.Token, cond ExpNode, body BlockStat) WhileStat

func (WhileStat) CompileStat 

func (s WhileStat) CompileStat(c *ir.Compiler)

CompileStat implements Stat.CompileStat.

func (WhileStat) HWrite 

func (s WhileStat) HWrite(w HWriter)

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