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parser.{Expr,Statement} publicly implementable (#7639)

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* parser.{Expr,Statement} publicly implementable

Signed-off-by: Owen Diehl <ow.diehl@gmail.com>
This commit is contained in:
Owen Diehl 2020-07-25 04:05:58 -04:00 committed by GitHub
parent e17d18a043
commit 00b7bdb1b6
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1 changed files with 17 additions and 17 deletions
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34
promql/parser/ast.go
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@ -26,7 +26,7 @@ import (
// Node is a generic interface for all nodes in an AST.
//
// Whenever numerous nodes are listed such as in a switch-case statement
// or a chain of function definitions (e.g. String(), expr(), etc.) convention is
// or a chain of function definitions (e.g. String(), PromQLExpr(), etc.) convention is
// to list them as follows:
//
// - Statements
@ -49,9 +49,9 @@ type Node interface {
type Statement interface {
Node
// stmt ensures that no other type accidentally implements the interface
// PromQLStmt ensures that no other type accidentally implements the interface
// nolint:unused
stmt()
PromQLStmt()
}
// EvalStmt holds an expression and information on the range it should
@ -66,7 +66,7 @@ type EvalStmt struct {
Interval time.Duration
}
func (*EvalStmt) stmt() {}
func (*EvalStmt) PromQLStmt() {}
// Expr is a generic interface for all expression types.
type Expr interface {
@ -75,8 +75,8 @@ type Expr interface {
// Type returns the type the expression evaluates to. It does not perform
// in-depth checks as this is done at parsing-time.
Type() ValueType
// expr ensures that no other types accidentally implement the interface.
expr()
// PromQLExpr ensures that no other types accidentally implement the interface.
PromQLExpr()
}
// Expressions is a list of expression nodes that implements Node.
@ -180,7 +180,7 @@ type VectorSelector struct {
type TestStmt func(context.Context) error
func (TestStmt) String() string { return "test statement" }
func (TestStmt) stmt() {}
func (TestStmt) PromQLStmt() {}
func (TestStmt) PositionRange() PositionRange {
return PositionRange{
@ -204,16 +204,16 @@ func (e *BinaryExpr) Type() ValueType {
return ValueTypeVector
}
func (*AggregateExpr) expr() {}
func (*BinaryExpr) expr() {}
func (*Call) expr() {}
func (*MatrixSelector) expr() {}
func (*SubqueryExpr) expr() {}
func (*NumberLiteral) expr() {}
func (*ParenExpr) expr() {}
func (*StringLiteral) expr() {}
func (*UnaryExpr) expr() {}
func (*VectorSelector) expr() {}
func (*AggregateExpr) PromQLExpr() {}
func (*BinaryExpr) PromQLExpr() {}
func (*Call) PromQLExpr() {}
func (*MatrixSelector) PromQLExpr() {}
func (*SubqueryExpr) PromQLExpr() {}
func (*NumberLiteral) PromQLExpr() {}
func (*ParenExpr) PromQLExpr() {}
func (*StringLiteral) PromQLExpr() {}
func (*UnaryExpr) PromQLExpr() {}
func (*VectorSelector) PromQLExpr() {}
// VectorMatchCardinality describes the cardinality relationship
// of two Vectors in a binary operation.