semantic

Documentation

Index

• func AddDefaultSource(ctx context.Context, seq *dag.Seq, source *data.Source, ...) error
• func Analyze(ctx context.Context, seq ast.Seq, source *data.Source, ...) (dag.Seq, error)
• func AnalyzeAddSource(ctx context.Context, seq ast.Seq, source *data.Source, ...) (dag.Seq, error)
• func DotExprToFieldPath(e ast.Expr) *dag.This
• func HasSource(seq dag.Seq) bool
• func StartsWithYield(seq dag.Seq) bool
• type Scope
  • func NewScope(parent *Scope) *Scope
  • func (s *Scope) DefineAs(name *ast.ID, e any) error
  • func (s *Scope) DefineConst(zctx *zed.Context, name *ast.ID, def dag.Expr) error
  • func (s *Scope) DefineVar(name *ast.ID) error
  • func (s *Scope) LookupExpr(name string) (dag.Expr, error)

Functions

func AddDefaultSource

func AddDefaultSource(ctx context.Context, seq *dag.Seq, source *data.Source, head *lakeparse.Commitish) error

func Analyze

func Analyze(ctx context.Context, seq ast.Seq, source *data.Source, head *lakeparse.Commitish) (dag.Seq, error)

Analyze performs a semantic analysis of the AST, translating it from AST to DAG form, resolving syntax ambiguities, and performing constant propagation. After semantic analysis, the DAG is ready for either optimization or compilation.

func AnalyzeAddSource

func AnalyzeAddSource(ctx context.Context, seq ast.Seq, source *data.Source, head *lakeparse.Commitish) (dag.Seq, error)

AnalyzeAddSource is the same as Analyze but it adds a default source if the DAG does not have one.

func DotExprToFieldPath

func DotExprToFieldPath(e ast.Expr) *dag.This

func HasSource

func HasSource(seq dag.Seq) bool

func StartsWithYield

func StartsWithYield(seq dag.Seq) bool

Types

type Scope

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

func NewScope

func NewScope(parent *Scope) *Scope

func (*Scope) DefineAs

func (s *Scope) DefineAs(name *ast.ID, e any) error

func (*Scope) DefineConst

func (s *Scope) DefineConst(zctx *zed.Context, name *ast.ID, def dag.Expr) error

func (*Scope) DefineVar

func (s *Scope) DefineVar(name *ast.ID) error

func (*Scope) LookupExpr

func (s *Scope) LookupExpr(name string) (dag.Expr, error)