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#pragma once
#include <mbgl/style/expression/parse.hpp>
#include <mbgl/style/expression/at.hpp>
#include <mbgl/style/expression/parsing_context.hpp>
#include <mbgl/style/expression/type.hpp>
namespace mbgl {
namespace style {
namespace expression {
struct ParseAt {
static ParseResult parse(const mbgl::style::conversion::Value& value, ParsingContext ctx) {
using namespace mbgl::style::conversion;
assert(isArray(value));
std::size_t length = arrayLength(value);
if (length != 3) {
ctx.error("Expected 2 arguments, but found " + std::to_string(length - 1) + " instead.");
return ParseResult();
}
ParseResult index = parseExpression(arrayMember(value, 1), ParsingContext(ctx, 1, {type::Number}));
ParseResult input = parseExpression(arrayMember(value, 2),
ParsingContext(ctx, 2, {type::Array(ctx.expected ? *ctx.expected : type::Value)}));
if (!index || !input) return ParseResult();
return ParseResult(std::make_unique<At>(std::move(*index), std::move(*input)));
}
};
} // namespace expression
} // namespace style
} // namespace mbgl
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