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Class Expr

Abstract class representing the style expressions used in Theme.

Hierarchy

Index

Methods

Methods

Abstract accept

  • accept<Result, Context>(visitor: ExprVisitor<Result, Context>, context: Context): Result

dependencies

evaluate

Protected Abstract exprIsDynamic

  • exprIsDynamic(): boolean

instantiate

intern

  • intern(pool: ExprPool): Expr

isDynamic

  • isDynamic(): boolean

toJSON

Static fromJSON

  • Creates a style expression from JSON.

    remarks

    The optional set of definitions is used to resolve the ref expressions.

    example
    const expr = Expr.fromJSON(["all",
    ["==", ["geometry-type"], "LineString"],
    ["has", "text"]
]);

    Parameters

    • json: JsonValue

      JSON object representing the expression to parse.

    • Optional definitions: Definitions

      Optional set of definitions used to expand references.

    • Optional definitionExprCache: Map<string, Expr>

      Optional cache of Expr instances

    Returns Expr

Static isExpr

  • isExpr(value: any): value is Expr

Static parse

  • parse(code: string): Expr | never

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